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Is Pimavanserin a Better Option for Parkinson’s Psychosis?
PHILADELPHIA —
In the first prospective comparison of the two antipsychotics in this patient population, pimavanserin yielded significant improvement across all parameters of efficacy without worsening motor symptoms and was very well tolerated, said study investigator Amey Mane, MD, Sun Pharma Laboratories, Mumbai, India.
Psychosis occurs in about 50% patients with Parkinson’s disease and is a major risk factor for hospitalization, nursing home placement, and mortality.
Antipsychotics are used to treat Parkinson’s disease psychosis, but evidence for the efficacy of quetiapine is inconsistent and clozapine requires regular monitoring for agranulocytosis, said Dr. Mane. Cholinergic blockade by these drugs can also increase non-motor symptoms such as constipation, drooling, and cognitive impairment.
Pimavanserin is an oral 5-HT2A inverse agonist and antagonist and the only Food and Drug Administration–approved medication for Parkinson’s disease psychosis, he said. The drug was approved in 2016, and its label was updated in 2023 to clarify that it can be used to treat patients with Parkinson’s disease psychosis, who also have dementia.
“To the best of our understanding, this is the first completed prospective study of pimavanserin with an active comparator, quetiapine,” in Parkinson’s disease psychosis, he said.
The findings were presented in a late-breaking abstract session at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
Primary Outcome at 56 Days
The assessor-blinded study enrolled 247 patients with Parkinson’s disease for at least 1 year, who were Hoehn and Yahr stage 3 or higher, with hallucinations and/or delusions on a stable dose of Parkinson’s disease medication for at least 4 weeks. The average duration of psychosis was 1.2 years.
Patients were randomly assigned to receive daily pimavanserin 34 mg or quetiapine 25-200 mg for 56 days and evaluated at baseline and days 14, 28, 42, and 56.
The mean change in Scale for the Assessment of Positive Symptoms–Parkinson’s disease (SAPS-PD) nine-item total scores improved from baseline in both groups at all visits (P < .0001) and was significantly greater at 42 days with pimavanserin than with quetiapine (−7.15 vs −6.33; P = .029).
The primary outcome of mean change in SAPS-PD total score at day 56 was −9.64 in the pimavanserin group and −8.37 in the quetiapine group (P = .008). The between-group difference was −1.27, and the upper bound of the 95% CI (−2.77 to 0.24) was lower than the prespecified margin of 0.9, demonstrating noninferiority, Dr. Mane said.
Secondary Endpoints and Safety
Pimavanserin was associated with significantly greater improvement than quetiapine for the following secondary outcomes:
- SAPS-Hallucinations and Delusions at day 42 (mean, −12.70 vs −11.40; P = .009) and day 56 (mean, −17.00 vs −15.60; P = .007)
- SAPS-Hallucinations at day 42 (mean, −5.61 vs −4.75; P = .01) and day 56 (mean, −7.33 vs −6.52; P = .02)
- Clinical Global Impression-Improvement score at day 56 (−1.90 vs −1.59; P = .01)
- Scales for Outcomes in Parkinson’s disease (SCOPA) scores for nighttime sleep at day 14 (−1.12 vs −0.85; P = .03) and SCOPA daytime wakefulness at day 28 (−2.42 vs −1.70; P = .01)
Treatment-emergent adverse events (TEAEs) were reported in 7.5% and 13.5% of the pimavanserin and quetiapine groups, respectively.
Five TEAEs, all of mild intensity, were reported as related to study drugs: Pyrexia (1), headache (1), and nasopharyngitis (2) with pimavanserin and headache (1) with quetiapine, Dr. Mane said. There was one unrelated fatal stroke in the quetiapine group. No drug discontinuations occurred because of TEAEs.
Delayed Onset of Action?
During a discussion of the results, Hubert Fernandez, MD, director, Center for Neurological Restoration, Cleveland Clinic in Ohio, asked whether the investigators observed a difference in onset between the two drugs.
“Our general impression in the United States is that pimavanserin has a slower uptake in efficacy as compared with quetiapine. If it [quetiapine] works, it works the next day or the day after, whereas with pimavanserin you have to wait for a week or 2. I was just wondering if that’s validated or just anecdotal experience,” he said.
Dr. Mane said the study showed no difference in efficacy at 14 days and greater improvement in efficacy between days 14 and 56.
Another attendee pointed out that quetiapine is particularly good at inducing sleep and asked whether some of the observed differences, especially early on, were due to the need to rapidly titrate quetiapine to induce sleep and get the sleep-wake cycle back on track.
“We did discuss this with most of our investigators, and they gave the same reason. It’s the titration with the quetiapine, and that’s why it’s seen in the early parts,” said Dr. Mane.
Reached for comment, Regina Katzenschlager, MD, Karl Landsteiner Institute for Neuroimmunological and Neurodegenerative Disorders, Klinik Donaustadt, Vienna, Austria, said the majority of drugs commonly used for other types of psychosis cannot be used in PD because of motor worsening.
“Quetiapine is one of the very, very few options we have to treat people with Parkinson’s psychosis because it leads to little, if any, worsening and is the best tolerated,” she said. “Everything else is almost absolutely contraindicated. So that’s why an additional drug — this one has a slightly different mechanism — is incredibly helpful in the clinic because not everyone responds to quetiapine.”
Dr. Katzenschlager pointed out that pimavanserin is not approved in Europe and that the present study was conducted for regulatory purposes in India.
Dr. Mane is an employee of Sun Pharma Laboratories. Dr. Katzenschlager reported having no relevant financial relationships.
A version of this article appeared on Medscape.com.
PHILADELPHIA —
In the first prospective comparison of the two antipsychotics in this patient population, pimavanserin yielded significant improvement across all parameters of efficacy without worsening motor symptoms and was very well tolerated, said study investigator Amey Mane, MD, Sun Pharma Laboratories, Mumbai, India.
Psychosis occurs in about 50% patients with Parkinson’s disease and is a major risk factor for hospitalization, nursing home placement, and mortality.
Antipsychotics are used to treat Parkinson’s disease psychosis, but evidence for the efficacy of quetiapine is inconsistent and clozapine requires regular monitoring for agranulocytosis, said Dr. Mane. Cholinergic blockade by these drugs can also increase non-motor symptoms such as constipation, drooling, and cognitive impairment.
Pimavanserin is an oral 5-HT2A inverse agonist and antagonist and the only Food and Drug Administration–approved medication for Parkinson’s disease psychosis, he said. The drug was approved in 2016, and its label was updated in 2023 to clarify that it can be used to treat patients with Parkinson’s disease psychosis, who also have dementia.
“To the best of our understanding, this is the first completed prospective study of pimavanserin with an active comparator, quetiapine,” in Parkinson’s disease psychosis, he said.
The findings were presented in a late-breaking abstract session at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
Primary Outcome at 56 Days
The assessor-blinded study enrolled 247 patients with Parkinson’s disease for at least 1 year, who were Hoehn and Yahr stage 3 or higher, with hallucinations and/or delusions on a stable dose of Parkinson’s disease medication for at least 4 weeks. The average duration of psychosis was 1.2 years.
Patients were randomly assigned to receive daily pimavanserin 34 mg or quetiapine 25-200 mg for 56 days and evaluated at baseline and days 14, 28, 42, and 56.
The mean change in Scale for the Assessment of Positive Symptoms–Parkinson’s disease (SAPS-PD) nine-item total scores improved from baseline in both groups at all visits (P < .0001) and was significantly greater at 42 days with pimavanserin than with quetiapine (−7.15 vs −6.33; P = .029).
The primary outcome of mean change in SAPS-PD total score at day 56 was −9.64 in the pimavanserin group and −8.37 in the quetiapine group (P = .008). The between-group difference was −1.27, and the upper bound of the 95% CI (−2.77 to 0.24) was lower than the prespecified margin of 0.9, demonstrating noninferiority, Dr. Mane said.
Secondary Endpoints and Safety
Pimavanserin was associated with significantly greater improvement than quetiapine for the following secondary outcomes:
- SAPS-Hallucinations and Delusions at day 42 (mean, −12.70 vs −11.40; P = .009) and day 56 (mean, −17.00 vs −15.60; P = .007)
- SAPS-Hallucinations at day 42 (mean, −5.61 vs −4.75; P = .01) and day 56 (mean, −7.33 vs −6.52; P = .02)
- Clinical Global Impression-Improvement score at day 56 (−1.90 vs −1.59; P = .01)
- Scales for Outcomes in Parkinson’s disease (SCOPA) scores for nighttime sleep at day 14 (−1.12 vs −0.85; P = .03) and SCOPA daytime wakefulness at day 28 (−2.42 vs −1.70; P = .01)
Treatment-emergent adverse events (TEAEs) were reported in 7.5% and 13.5% of the pimavanserin and quetiapine groups, respectively.
Five TEAEs, all of mild intensity, were reported as related to study drugs: Pyrexia (1), headache (1), and nasopharyngitis (2) with pimavanserin and headache (1) with quetiapine, Dr. Mane said. There was one unrelated fatal stroke in the quetiapine group. No drug discontinuations occurred because of TEAEs.
Delayed Onset of Action?
During a discussion of the results, Hubert Fernandez, MD, director, Center for Neurological Restoration, Cleveland Clinic in Ohio, asked whether the investigators observed a difference in onset between the two drugs.
“Our general impression in the United States is that pimavanserin has a slower uptake in efficacy as compared with quetiapine. If it [quetiapine] works, it works the next day or the day after, whereas with pimavanserin you have to wait for a week or 2. I was just wondering if that’s validated or just anecdotal experience,” he said.
Dr. Mane said the study showed no difference in efficacy at 14 days and greater improvement in efficacy between days 14 and 56.
Another attendee pointed out that quetiapine is particularly good at inducing sleep and asked whether some of the observed differences, especially early on, were due to the need to rapidly titrate quetiapine to induce sleep and get the sleep-wake cycle back on track.
“We did discuss this with most of our investigators, and they gave the same reason. It’s the titration with the quetiapine, and that’s why it’s seen in the early parts,” said Dr. Mane.
Reached for comment, Regina Katzenschlager, MD, Karl Landsteiner Institute for Neuroimmunological and Neurodegenerative Disorders, Klinik Donaustadt, Vienna, Austria, said the majority of drugs commonly used for other types of psychosis cannot be used in PD because of motor worsening.
“Quetiapine is one of the very, very few options we have to treat people with Parkinson’s psychosis because it leads to little, if any, worsening and is the best tolerated,” she said. “Everything else is almost absolutely contraindicated. So that’s why an additional drug — this one has a slightly different mechanism — is incredibly helpful in the clinic because not everyone responds to quetiapine.”
Dr. Katzenschlager pointed out that pimavanserin is not approved in Europe and that the present study was conducted for regulatory purposes in India.
Dr. Mane is an employee of Sun Pharma Laboratories. Dr. Katzenschlager reported having no relevant financial relationships.
A version of this article appeared on Medscape.com.
PHILADELPHIA —
In the first prospective comparison of the two antipsychotics in this patient population, pimavanserin yielded significant improvement across all parameters of efficacy without worsening motor symptoms and was very well tolerated, said study investigator Amey Mane, MD, Sun Pharma Laboratories, Mumbai, India.
Psychosis occurs in about 50% patients with Parkinson’s disease and is a major risk factor for hospitalization, nursing home placement, and mortality.
Antipsychotics are used to treat Parkinson’s disease psychosis, but evidence for the efficacy of quetiapine is inconsistent and clozapine requires regular monitoring for agranulocytosis, said Dr. Mane. Cholinergic blockade by these drugs can also increase non-motor symptoms such as constipation, drooling, and cognitive impairment.
Pimavanserin is an oral 5-HT2A inverse agonist and antagonist and the only Food and Drug Administration–approved medication for Parkinson’s disease psychosis, he said. The drug was approved in 2016, and its label was updated in 2023 to clarify that it can be used to treat patients with Parkinson’s disease psychosis, who also have dementia.
“To the best of our understanding, this is the first completed prospective study of pimavanserin with an active comparator, quetiapine,” in Parkinson’s disease psychosis, he said.
The findings were presented in a late-breaking abstract session at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
Primary Outcome at 56 Days
The assessor-blinded study enrolled 247 patients with Parkinson’s disease for at least 1 year, who were Hoehn and Yahr stage 3 or higher, with hallucinations and/or delusions on a stable dose of Parkinson’s disease medication for at least 4 weeks. The average duration of psychosis was 1.2 years.
Patients were randomly assigned to receive daily pimavanserin 34 mg or quetiapine 25-200 mg for 56 days and evaluated at baseline and days 14, 28, 42, and 56.
The mean change in Scale for the Assessment of Positive Symptoms–Parkinson’s disease (SAPS-PD) nine-item total scores improved from baseline in both groups at all visits (P < .0001) and was significantly greater at 42 days with pimavanserin than with quetiapine (−7.15 vs −6.33; P = .029).
The primary outcome of mean change in SAPS-PD total score at day 56 was −9.64 in the pimavanserin group and −8.37 in the quetiapine group (P = .008). The between-group difference was −1.27, and the upper bound of the 95% CI (−2.77 to 0.24) was lower than the prespecified margin of 0.9, demonstrating noninferiority, Dr. Mane said.
Secondary Endpoints and Safety
Pimavanserin was associated with significantly greater improvement than quetiapine for the following secondary outcomes:
- SAPS-Hallucinations and Delusions at day 42 (mean, −12.70 vs −11.40; P = .009) and day 56 (mean, −17.00 vs −15.60; P = .007)
- SAPS-Hallucinations at day 42 (mean, −5.61 vs −4.75; P = .01) and day 56 (mean, −7.33 vs −6.52; P = .02)
- Clinical Global Impression-Improvement score at day 56 (−1.90 vs −1.59; P = .01)
- Scales for Outcomes in Parkinson’s disease (SCOPA) scores for nighttime sleep at day 14 (−1.12 vs −0.85; P = .03) and SCOPA daytime wakefulness at day 28 (−2.42 vs −1.70; P = .01)
Treatment-emergent adverse events (TEAEs) were reported in 7.5% and 13.5% of the pimavanserin and quetiapine groups, respectively.
Five TEAEs, all of mild intensity, were reported as related to study drugs: Pyrexia (1), headache (1), and nasopharyngitis (2) with pimavanserin and headache (1) with quetiapine, Dr. Mane said. There was one unrelated fatal stroke in the quetiapine group. No drug discontinuations occurred because of TEAEs.
Delayed Onset of Action?
During a discussion of the results, Hubert Fernandez, MD, director, Center for Neurological Restoration, Cleveland Clinic in Ohio, asked whether the investigators observed a difference in onset between the two drugs.
“Our general impression in the United States is that pimavanserin has a slower uptake in efficacy as compared with quetiapine. If it [quetiapine] works, it works the next day or the day after, whereas with pimavanserin you have to wait for a week or 2. I was just wondering if that’s validated or just anecdotal experience,” he said.
Dr. Mane said the study showed no difference in efficacy at 14 days and greater improvement in efficacy between days 14 and 56.
Another attendee pointed out that quetiapine is particularly good at inducing sleep and asked whether some of the observed differences, especially early on, were due to the need to rapidly titrate quetiapine to induce sleep and get the sleep-wake cycle back on track.
“We did discuss this with most of our investigators, and they gave the same reason. It’s the titration with the quetiapine, and that’s why it’s seen in the early parts,” said Dr. Mane.
Reached for comment, Regina Katzenschlager, MD, Karl Landsteiner Institute for Neuroimmunological and Neurodegenerative Disorders, Klinik Donaustadt, Vienna, Austria, said the majority of drugs commonly used for other types of psychosis cannot be used in PD because of motor worsening.
“Quetiapine is one of the very, very few options we have to treat people with Parkinson’s psychosis because it leads to little, if any, worsening and is the best tolerated,” she said. “Everything else is almost absolutely contraindicated. So that’s why an additional drug — this one has a slightly different mechanism — is incredibly helpful in the clinic because not everyone responds to quetiapine.”
Dr. Katzenschlager pointed out that pimavanserin is not approved in Europe and that the present study was conducted for regulatory purposes in India.
Dr. Mane is an employee of Sun Pharma Laboratories. Dr. Katzenschlager reported having no relevant financial relationships.
A version of this article appeared on Medscape.com.
FROM MDS 2024
Clozapine and Respiratory Infection Risk: What to Know
Clozapine is considered the drug of choice for treatment-resistant schizophrenia in guidelines globally, but it remains significantly underutilized. This is largely due to its range of side effects, particularly its increased infection risk which prompted the US Food and Drug Administration (FDA) to mandate regular blood testing to monitor neutrophil counts.
The COVID-19 pandemic raised new concerns about the care of clozapine-treated patients, leading clinicians and patients to urge the FDA to relax prescription requirements for the drug under the Risk Evaluation and Mitigation Strategy (REMS) program.
As the FDA prepares for a public hearing in November on proposed adjustments to the drug’s REMS criteria, a growing body of research is challenging the previous understanding of clozapine and infection risk.
Clarifying the Risk
Research on the link between clozapine and respiratory infections has produced conflicting results. Some studies indicate little to no increased risk for mild COVID-19 and other respiratory illnesses, while others have shown a higher likelihood of severe infection.
A recent nationwide Danish registry study of respiratory infections in people with a schizophrenia spectrum disorder could bring some clarity, Maxime Taquet, MD, a clinical lecturer at the University of Oxford, Warneford Hospital, Oxford, England, told this news organization.
By tracking periods when patients were on and off clozapine and other antipsychotics, the study offers more precise risk estimates, distinguishing the risks associated with the antipsychotic from those related to underlying schizophrenia, said Dr. Taquet, who authored an accompanying editorial on the study.
“It’s very important to try to disentangle the effects of schizophrenia, its severity, from the medication,” Dr. Taquet said. “I think that the Danish study is the first to try and really do that with as much precision as possible.”
After adjusting for key confounders including economic status and COVID-19 vaccination status, the researchers found that individuals taking antipsychotics had lower odds of testing positive for SARS-CoV-2 and similar rates of filled anti-infective prescriptions as those not taking the drugs.
Although antipsychotic use was not linked to higher rates of mild infection, it was linked to an increased risk for COVID-19 hospitalization in individuals older than 70 years, as well as hospitalization and death from other respiratory infections, mainly pneumonia, in those older than 40 years.
Notably, there was no excess risk for any outcome with clozapine vs other antipsychotics.
Strong Link to Pneumonia Risk
Results from a longitudinal Finnish study, just published in The American Journal of Psychiatry, also show an increased risk for severe outcomes from ileus and pneumonia among more than 2600 patients with schizophrenia taking clozapine.
Twenty years after initiating clozapine, the cumulative incidence estimate for ileus was 5.3% — more than sixfold higher than previously reported. The incidence of pneumonia was also high, at 29.5%.
Both illnesses were significantly associated with mortality, with odds ratios of 4.5 and 2.8, respectively.
These findings align with previous pharmacovigilance studies, with reported mortality rates for gastrointestinal hypomotility and pneumonia that were 4-10 times higher than those for agranulocytosis, the researchers said.
The study “really adds to a growing body of research suggesting a connection between clozapine use and a higher risk of developing pneumonia,” Robert O. Cotes, MD, a professor of psychiatry and behavioral sciences at Emory University, Atlanta, who specializes in the use of clozapine, told this news organization.
“Additionally, when people on clozapine do contract pneumonia, there’s concern the condition may be more dangerous,” he added.
A Closer Look at Neutropenia Risk
Neutropenia receives the lion’s share of attention among clozapine’s potential side effects, but this focus may need to be re-evaluated, Dr. Cotes said.
He pointed out that recent data suggest the risk for severe neutropenia, 2-3 years after initiating clozapine, is comparable to that of other antipsychotics.
A study of 26,630 clozapine users in Australia and New Zealand showed that most cases of severe neutropenia leading to clozapine cessation peaked within 18 weeks and was negligible after 2 years. This suggests weekly hematologic monitoring could potentially be discontinued after the 2-year mark.
Another study reported earlier this year by this news organization showed a low risk for mild or moderate neutropenia and no severe cases in nearly 1000 people taking clozapine.
“I worry that we may be missing the forest for the trees by hyperfocusing on neutropenia and not considering clozapine’s other potential serious side effects like pneumonia, myocarditis, and gastrointestinal hypermotility,” Dr. Cotes said.
Importance of Vaccines
The findings of these studies highlight the importance of vaccines in this at-risk group, said Dr. Taquet, a point emphasized by investigators of the Danish study he reviewed.
“Inspired by the experience of COVID-19 vaccine prioritization in severe mental illness and based on our findings, there is momentum for preventive action,” the authors wrote. “Our findings do not suggest the avoidance of specific antipsychotics but rather a call for increased vigilance regarding this at-risk group.”
This includes recommending pneumococcal, influenza, COVID-19, and other anti-infective vaccines in those older than 40 years treated with, or due to start, an antipsychotic.
“It’s not mandatory, but we do recommend that patients on clozapine get the regular vaccines,” Dr. Taquet said.
Pointing to the recent study on pneumonia risk, Dr. Cotes said addressing underlying risk factors, such as smoking, obesity, and possibly sedation and excessive salivation caused by clozapine, is key.
“And to make sure that vaccinations are up to date, particularly heading into this fall,” he added.
Rethinking Clozapine REMS
One of the most challenging issues facing clinicians and researchers is how to help people understand the safety profile of clozapine and to use it with more confidence, Dr. Cotes said.
“A lot of people hear about clozapine and they think about neutropenia, they think about side effects, the REMS system, and all of these factors really drive down clozapine utilization,” he said.
Treatment-resistant schizophrenia affects about a quarter of those with schizophrenia, yet only 4% of these patients receive clozapine in the United States, Dr. Cotes said. That number may be even lower for its other indication of reducing suicidal behavior in patients with schizophrenia or schizoaffective disorder.
The clozapine REMS is viewed as a major barrier to utilization and requires certification of pharmacists and physicians and use of a central system to monitor absolute neutrophil counts for neutropenia in patients.
As previously reported by this news organization in November 2022, the FDA opted to temporarily exercise enforcement discretion for certain aspects of the drug safety program to ensure continuity of care for patients after concerns were raised by the American Psychiatric Association (APA) along with other professional organizations.
Even with that temporary enforcement discretion, “reports have shown that over half of those prescribed clozapine have trouble accessing the medication because of the REMS program,” a spokesperson for the APA told this news organization.
“Not only are patients having trouble accessing the medication, many have trouble finding a prescriber in their geographic locations and others because of the monitoring requirements have their treatment discontinued leading to negative outcomes,” the spokesperson said.
The FDA is currently reviewing the clozapine REMS and is holding a joint advisory committee meeting on November 19 to discuss the review and “possible changes to minimize burden on patients, pharmacies, and prescribers while maintaining safe use of clozapine.”
The APA plans to submit written and oral comments to the advisory committees.
“We are hopeful that the re-evaluation meeting in November will remove barriers and increase access to clozapine, which is currently highly underutilized, especially in marginalized communities,” the spokesperson said.
Dr. Cotes reported serving as a speaker and consultant for Saladax Biomedical and as a consultant for Syneos Health. Dr. Taquet reported having no competing interests.
A version of this article first appeared on Medscape.com.
Clozapine is considered the drug of choice for treatment-resistant schizophrenia in guidelines globally, but it remains significantly underutilized. This is largely due to its range of side effects, particularly its increased infection risk which prompted the US Food and Drug Administration (FDA) to mandate regular blood testing to monitor neutrophil counts.
The COVID-19 pandemic raised new concerns about the care of clozapine-treated patients, leading clinicians and patients to urge the FDA to relax prescription requirements for the drug under the Risk Evaluation and Mitigation Strategy (REMS) program.
As the FDA prepares for a public hearing in November on proposed adjustments to the drug’s REMS criteria, a growing body of research is challenging the previous understanding of clozapine and infection risk.
Clarifying the Risk
Research on the link between clozapine and respiratory infections has produced conflicting results. Some studies indicate little to no increased risk for mild COVID-19 and other respiratory illnesses, while others have shown a higher likelihood of severe infection.
A recent nationwide Danish registry study of respiratory infections in people with a schizophrenia spectrum disorder could bring some clarity, Maxime Taquet, MD, a clinical lecturer at the University of Oxford, Warneford Hospital, Oxford, England, told this news organization.
By tracking periods when patients were on and off clozapine and other antipsychotics, the study offers more precise risk estimates, distinguishing the risks associated with the antipsychotic from those related to underlying schizophrenia, said Dr. Taquet, who authored an accompanying editorial on the study.
“It’s very important to try to disentangle the effects of schizophrenia, its severity, from the medication,” Dr. Taquet said. “I think that the Danish study is the first to try and really do that with as much precision as possible.”
After adjusting for key confounders including economic status and COVID-19 vaccination status, the researchers found that individuals taking antipsychotics had lower odds of testing positive for SARS-CoV-2 and similar rates of filled anti-infective prescriptions as those not taking the drugs.
Although antipsychotic use was not linked to higher rates of mild infection, it was linked to an increased risk for COVID-19 hospitalization in individuals older than 70 years, as well as hospitalization and death from other respiratory infections, mainly pneumonia, in those older than 40 years.
Notably, there was no excess risk for any outcome with clozapine vs other antipsychotics.
Strong Link to Pneumonia Risk
Results from a longitudinal Finnish study, just published in The American Journal of Psychiatry, also show an increased risk for severe outcomes from ileus and pneumonia among more than 2600 patients with schizophrenia taking clozapine.
Twenty years after initiating clozapine, the cumulative incidence estimate for ileus was 5.3% — more than sixfold higher than previously reported. The incidence of pneumonia was also high, at 29.5%.
Both illnesses were significantly associated with mortality, with odds ratios of 4.5 and 2.8, respectively.
These findings align with previous pharmacovigilance studies, with reported mortality rates for gastrointestinal hypomotility and pneumonia that were 4-10 times higher than those for agranulocytosis, the researchers said.
The study “really adds to a growing body of research suggesting a connection between clozapine use and a higher risk of developing pneumonia,” Robert O. Cotes, MD, a professor of psychiatry and behavioral sciences at Emory University, Atlanta, who specializes in the use of clozapine, told this news organization.
“Additionally, when people on clozapine do contract pneumonia, there’s concern the condition may be more dangerous,” he added.
A Closer Look at Neutropenia Risk
Neutropenia receives the lion’s share of attention among clozapine’s potential side effects, but this focus may need to be re-evaluated, Dr. Cotes said.
He pointed out that recent data suggest the risk for severe neutropenia, 2-3 years after initiating clozapine, is comparable to that of other antipsychotics.
A study of 26,630 clozapine users in Australia and New Zealand showed that most cases of severe neutropenia leading to clozapine cessation peaked within 18 weeks and was negligible after 2 years. This suggests weekly hematologic monitoring could potentially be discontinued after the 2-year mark.
Another study reported earlier this year by this news organization showed a low risk for mild or moderate neutropenia and no severe cases in nearly 1000 people taking clozapine.
“I worry that we may be missing the forest for the trees by hyperfocusing on neutropenia and not considering clozapine’s other potential serious side effects like pneumonia, myocarditis, and gastrointestinal hypermotility,” Dr. Cotes said.
Importance of Vaccines
The findings of these studies highlight the importance of vaccines in this at-risk group, said Dr. Taquet, a point emphasized by investigators of the Danish study he reviewed.
“Inspired by the experience of COVID-19 vaccine prioritization in severe mental illness and based on our findings, there is momentum for preventive action,” the authors wrote. “Our findings do not suggest the avoidance of specific antipsychotics but rather a call for increased vigilance regarding this at-risk group.”
This includes recommending pneumococcal, influenza, COVID-19, and other anti-infective vaccines in those older than 40 years treated with, or due to start, an antipsychotic.
“It’s not mandatory, but we do recommend that patients on clozapine get the regular vaccines,” Dr. Taquet said.
Pointing to the recent study on pneumonia risk, Dr. Cotes said addressing underlying risk factors, such as smoking, obesity, and possibly sedation and excessive salivation caused by clozapine, is key.
“And to make sure that vaccinations are up to date, particularly heading into this fall,” he added.
Rethinking Clozapine REMS
One of the most challenging issues facing clinicians and researchers is how to help people understand the safety profile of clozapine and to use it with more confidence, Dr. Cotes said.
“A lot of people hear about clozapine and they think about neutropenia, they think about side effects, the REMS system, and all of these factors really drive down clozapine utilization,” he said.
Treatment-resistant schizophrenia affects about a quarter of those with schizophrenia, yet only 4% of these patients receive clozapine in the United States, Dr. Cotes said. That number may be even lower for its other indication of reducing suicidal behavior in patients with schizophrenia or schizoaffective disorder.
The clozapine REMS is viewed as a major barrier to utilization and requires certification of pharmacists and physicians and use of a central system to monitor absolute neutrophil counts for neutropenia in patients.
As previously reported by this news organization in November 2022, the FDA opted to temporarily exercise enforcement discretion for certain aspects of the drug safety program to ensure continuity of care for patients after concerns were raised by the American Psychiatric Association (APA) along with other professional organizations.
Even with that temporary enforcement discretion, “reports have shown that over half of those prescribed clozapine have trouble accessing the medication because of the REMS program,” a spokesperson for the APA told this news organization.
“Not only are patients having trouble accessing the medication, many have trouble finding a prescriber in their geographic locations and others because of the monitoring requirements have their treatment discontinued leading to negative outcomes,” the spokesperson said.
The FDA is currently reviewing the clozapine REMS and is holding a joint advisory committee meeting on November 19 to discuss the review and “possible changes to minimize burden on patients, pharmacies, and prescribers while maintaining safe use of clozapine.”
The APA plans to submit written and oral comments to the advisory committees.
“We are hopeful that the re-evaluation meeting in November will remove barriers and increase access to clozapine, which is currently highly underutilized, especially in marginalized communities,” the spokesperson said.
Dr. Cotes reported serving as a speaker and consultant for Saladax Biomedical and as a consultant for Syneos Health. Dr. Taquet reported having no competing interests.
A version of this article first appeared on Medscape.com.
Clozapine is considered the drug of choice for treatment-resistant schizophrenia in guidelines globally, but it remains significantly underutilized. This is largely due to its range of side effects, particularly its increased infection risk which prompted the US Food and Drug Administration (FDA) to mandate regular blood testing to monitor neutrophil counts.
The COVID-19 pandemic raised new concerns about the care of clozapine-treated patients, leading clinicians and patients to urge the FDA to relax prescription requirements for the drug under the Risk Evaluation and Mitigation Strategy (REMS) program.
As the FDA prepares for a public hearing in November on proposed adjustments to the drug’s REMS criteria, a growing body of research is challenging the previous understanding of clozapine and infection risk.
Clarifying the Risk
Research on the link between clozapine and respiratory infections has produced conflicting results. Some studies indicate little to no increased risk for mild COVID-19 and other respiratory illnesses, while others have shown a higher likelihood of severe infection.
A recent nationwide Danish registry study of respiratory infections in people with a schizophrenia spectrum disorder could bring some clarity, Maxime Taquet, MD, a clinical lecturer at the University of Oxford, Warneford Hospital, Oxford, England, told this news organization.
By tracking periods when patients were on and off clozapine and other antipsychotics, the study offers more precise risk estimates, distinguishing the risks associated with the antipsychotic from those related to underlying schizophrenia, said Dr. Taquet, who authored an accompanying editorial on the study.
“It’s very important to try to disentangle the effects of schizophrenia, its severity, from the medication,” Dr. Taquet said. “I think that the Danish study is the first to try and really do that with as much precision as possible.”
After adjusting for key confounders including economic status and COVID-19 vaccination status, the researchers found that individuals taking antipsychotics had lower odds of testing positive for SARS-CoV-2 and similar rates of filled anti-infective prescriptions as those not taking the drugs.
Although antipsychotic use was not linked to higher rates of mild infection, it was linked to an increased risk for COVID-19 hospitalization in individuals older than 70 years, as well as hospitalization and death from other respiratory infections, mainly pneumonia, in those older than 40 years.
Notably, there was no excess risk for any outcome with clozapine vs other antipsychotics.
Strong Link to Pneumonia Risk
Results from a longitudinal Finnish study, just published in The American Journal of Psychiatry, also show an increased risk for severe outcomes from ileus and pneumonia among more than 2600 patients with schizophrenia taking clozapine.
Twenty years after initiating clozapine, the cumulative incidence estimate for ileus was 5.3% — more than sixfold higher than previously reported. The incidence of pneumonia was also high, at 29.5%.
Both illnesses were significantly associated with mortality, with odds ratios of 4.5 and 2.8, respectively.
These findings align with previous pharmacovigilance studies, with reported mortality rates for gastrointestinal hypomotility and pneumonia that were 4-10 times higher than those for agranulocytosis, the researchers said.
The study “really adds to a growing body of research suggesting a connection between clozapine use and a higher risk of developing pneumonia,” Robert O. Cotes, MD, a professor of psychiatry and behavioral sciences at Emory University, Atlanta, who specializes in the use of clozapine, told this news organization.
“Additionally, when people on clozapine do contract pneumonia, there’s concern the condition may be more dangerous,” he added.
A Closer Look at Neutropenia Risk
Neutropenia receives the lion’s share of attention among clozapine’s potential side effects, but this focus may need to be re-evaluated, Dr. Cotes said.
He pointed out that recent data suggest the risk for severe neutropenia, 2-3 years after initiating clozapine, is comparable to that of other antipsychotics.
A study of 26,630 clozapine users in Australia and New Zealand showed that most cases of severe neutropenia leading to clozapine cessation peaked within 18 weeks and was negligible after 2 years. This suggests weekly hematologic monitoring could potentially be discontinued after the 2-year mark.
Another study reported earlier this year by this news organization showed a low risk for mild or moderate neutropenia and no severe cases in nearly 1000 people taking clozapine.
“I worry that we may be missing the forest for the trees by hyperfocusing on neutropenia and not considering clozapine’s other potential serious side effects like pneumonia, myocarditis, and gastrointestinal hypermotility,” Dr. Cotes said.
Importance of Vaccines
The findings of these studies highlight the importance of vaccines in this at-risk group, said Dr. Taquet, a point emphasized by investigators of the Danish study he reviewed.
“Inspired by the experience of COVID-19 vaccine prioritization in severe mental illness and based on our findings, there is momentum for preventive action,” the authors wrote. “Our findings do not suggest the avoidance of specific antipsychotics but rather a call for increased vigilance regarding this at-risk group.”
This includes recommending pneumococcal, influenza, COVID-19, and other anti-infective vaccines in those older than 40 years treated with, or due to start, an antipsychotic.
“It’s not mandatory, but we do recommend that patients on clozapine get the regular vaccines,” Dr. Taquet said.
Pointing to the recent study on pneumonia risk, Dr. Cotes said addressing underlying risk factors, such as smoking, obesity, and possibly sedation and excessive salivation caused by clozapine, is key.
“And to make sure that vaccinations are up to date, particularly heading into this fall,” he added.
Rethinking Clozapine REMS
One of the most challenging issues facing clinicians and researchers is how to help people understand the safety profile of clozapine and to use it with more confidence, Dr. Cotes said.
“A lot of people hear about clozapine and they think about neutropenia, they think about side effects, the REMS system, and all of these factors really drive down clozapine utilization,” he said.
Treatment-resistant schizophrenia affects about a quarter of those with schizophrenia, yet only 4% of these patients receive clozapine in the United States, Dr. Cotes said. That number may be even lower for its other indication of reducing suicidal behavior in patients with schizophrenia or schizoaffective disorder.
The clozapine REMS is viewed as a major barrier to utilization and requires certification of pharmacists and physicians and use of a central system to monitor absolute neutrophil counts for neutropenia in patients.
As previously reported by this news organization in November 2022, the FDA opted to temporarily exercise enforcement discretion for certain aspects of the drug safety program to ensure continuity of care for patients after concerns were raised by the American Psychiatric Association (APA) along with other professional organizations.
Even with that temporary enforcement discretion, “reports have shown that over half of those prescribed clozapine have trouble accessing the medication because of the REMS program,” a spokesperson for the APA told this news organization.
“Not only are patients having trouble accessing the medication, many have trouble finding a prescriber in their geographic locations and others because of the monitoring requirements have their treatment discontinued leading to negative outcomes,” the spokesperson said.
The FDA is currently reviewing the clozapine REMS and is holding a joint advisory committee meeting on November 19 to discuss the review and “possible changes to minimize burden on patients, pharmacies, and prescribers while maintaining safe use of clozapine.”
The APA plans to submit written and oral comments to the advisory committees.
“We are hopeful that the re-evaluation meeting in November will remove barriers and increase access to clozapine, which is currently highly underutilized, especially in marginalized communities,” the spokesperson said.
Dr. Cotes reported serving as a speaker and consultant for Saladax Biomedical and as a consultant for Syneos Health. Dr. Taquet reported having no competing interests.
A version of this article first appeared on Medscape.com.
Investigational Med for Tourette Syndrome Promising
PHILADELPHIA — , results of a new analysis suggest.
As previously reported, the first-in-class dopamine-1 (D1) receptor antagonist reduced the primary endpoint of tic severity scores by 30% compared with placebo among 149 patients in the 12-week, phase 2b D1AMOND trial.
What was unknown, however, is whether ecopipam would affect the comorbidities of attention-deficit/hyperactivity disorder (ADHD), anxiety, obsessive-compulsive disorder (OCD), and depression that were present in two thirds of participants.
The two key findings in this post hoc analysis were “first, that patients with a nonmotor diagnosis like depression or ADHD did not do any worse in terms of tic efficacy; and second, we didn’t find any evidence that any of the nonmotor symptoms of Tourette’s got worse with ecopipam,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology at University of Cincinnati Children’s Hospital Medical Center.
Dr. Gilbert presented the results at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
No Worsening of ADHD Symptoms
Tourette syndrome affects approximately 1 in 160 children between 5 and 17 years of age in the United States, data from the Tourette Association of America show. Research has shown that 85% of patients with Tourette syndrome will have a co-occurring psychiatric condition.
Guidelines recommend Comprehensive Behavioral Intervention for Tics (CBIT) as first-line treatment for Tourette syndrome, but cost and access are barriers. The only currently approved medications to treat Tourette syndrome are antipsychotics that act on the D2 receptor, but their use is limited by the potential for weight gain, metabolic changes, drug-induced movement disorders, and risk for suicidality, said Dr. Gilbert.
The D1AMOND study randomly assigned patients aged 6-17 years with Tourette syndrome and a Yale Global Tic Severity Total Tic Scale score of at least 20 to receive a target steady-state dose of 2 mg/kg/d of oral ecopipam or placebo for a 4-week titration period, followed by an 8-week treatment phase before being tapered off the study drug.
Patients were allowed to remain on medications without D2-receptor blocking activity for anxiety, OCD, and ADHD if the dosage was stable for 4 weeks before screening and not specifically prescribed for tics.
A mixed model for repeated measures was used to assess changes in several scales administered at baseline and at weeks 4, 6, 8, and 12: the Swanson, Nolan, and Pelham Teacher and Parent Rating Scale (SNAP-IV); Pediatric Anxiety Rating Scale; Children’s Yale-Brown Obsessive-Compulsive Scale (CY-BOCS), and Children’s Depression Rating Scale–Revised (CDRS-R).
In patients with a co-occurring psychiatric condition, no significant differences were found over time between ecopipam and placebo in terms of SNAP-IV (-4.4; P = .45), Pediatric Anxiety Rating Scale (1.0; P = .62), CDRS-R (-3.2; P = .65), or CY-BOCS (-0.7; P = .76) scores.
For ADHD, the most frequent comorbidity, scores trended lower in the ecopipam group but were not significantly different from those in the placebo group. “We found no evidence that ecopipam worsened ADHD symptoms,” Dr. Gilbert said.
No Weight Gain
Suicidal ideation was reported during the dosing period in eight patients in the placebo group and none in the ecopipam group. One patient treated with ecopipam had multiple depressive episodes and dropped out of the study on day 79. Ecopipam was discontinued in another patient because of anxiety.
Notably, there was more weight gain in the placebo group than in the ecopipam group (2.4 kg vs 1.8 kg) by 12 weeks. No shifts from baseline were seen in blood glucose, A1c, total cholesterol, or triglycerides in either group.
The lack of weight gain with ecopipam is important, Dr. Gilbert stressed. “Medicines that block D2 so often cause weight gain, and a lot of our patients, unfortunately, can be heavier already,” he explained. “We don’t want to make that worse or put them at a long-term risk of type 2 diabetes.”
For patients with more severe disease, we really “do need something else besides D2-blockers in our tool kit,” he added.
Commenting on the study, Tanya Simuni, MD, co-moderator of the session and director of the Parkinson’s Disease and Movement Disorders Center, Northwestern Feinberg School of Medicine, Chicago, said the aim of assessing D1-directed medications is to reduce the negative impact of traditional antipsychotics with a theoretical benefit on hyperkinetic movement.
But the most important thing that they’ve shown is that “there was no negative effect, no liability for the nonmotor manifestations of Tourette’s. That is important because Tourette’s is not a pure motor syndrome, and psychiatric manifestations in a lot of cases are associated with more disease-related quality of life impairment compared to the motor manifestations,” said Dr. Simuni.
That said, she noted, the “ideal drug would be the one that would have benefit for both motor and nonmotor domains.”
Multiple Agents in the Pipeline
“The neuropharmacology of Tourette syndrome has long remained stagnant, and most existing treatments often fail to balance efficacy with tolerability, underscoring the urgent need for newer therapeutics,” Christos Ganos, MD, professor of neurology, University of Toronto, said in a press release.
He noted that three studies have been published on ecopipam since 2014: an 8-week, open-label trial in adults with Tourette syndrome, a 4-week, placebo-controlled crossover trial in 38 children with Tourette syndrome, and the 12-week D1AMOND trial.
“These studies demonstrated clinically meaningful reductions in tics, without relevant safety concerns or changes in Tourette syndrome-typical neuropsychiatric measures, as also shown by the abstract highlighted here,” Dr. Ganos said.
“This emerging body of research provides a solid foundation for introducing ecopipam as a novel pharmacological agent to treat tics and may motivate further work, both on the pathophysiology and pharmacotherapy of tic disorders and their associations.”
A single-arm, phase 3 trial is currently underway at 58 centers in North America and Europe investigating the long-term safety and tolerability of ecopipam over 24 months in 150 children, adolescents, and adults with Tourette syndrome. The study is expected to be completed in 2027.
Several other new medications are also under investigation including the vesicular monoamine transporter (VMAT2) inhibitors tetrabenazine, deutetrabenazine, and valbenazine; the PEDE10A inhibitor gemlapodect; the allopregnanolone antagonist sepranolone; and SCI-110, which combines dronabinol (the synthetic form of tetrahydrocannabinol) and the endocannabinoid palmitoylethanolamide.
The study was funded by Emalex Biosciences. Dr. Gilbert’s institution received research support from Emalex Biosciences and PTC Therapeutics. Dr. Gilbert has received publishing royalties from a healthcare-related publication; compensation for serving as a medical expert with Teladoc; Advanced Medical; and the National Vaccine Injury Compensation Program, US Department of Health and Human Services. Simuni reports no relevant conflicts of interest. Dr. Ganos has received honoraria for educational activities from the Movement Disorder Society and academic research support from VolkswagenStiftung.
A version of this article first appeared on Medscape.com.
PHILADELPHIA — , results of a new analysis suggest.
As previously reported, the first-in-class dopamine-1 (D1) receptor antagonist reduced the primary endpoint of tic severity scores by 30% compared with placebo among 149 patients in the 12-week, phase 2b D1AMOND trial.
What was unknown, however, is whether ecopipam would affect the comorbidities of attention-deficit/hyperactivity disorder (ADHD), anxiety, obsessive-compulsive disorder (OCD), and depression that were present in two thirds of participants.
The two key findings in this post hoc analysis were “first, that patients with a nonmotor diagnosis like depression or ADHD did not do any worse in terms of tic efficacy; and second, we didn’t find any evidence that any of the nonmotor symptoms of Tourette’s got worse with ecopipam,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology at University of Cincinnati Children’s Hospital Medical Center.
Dr. Gilbert presented the results at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
No Worsening of ADHD Symptoms
Tourette syndrome affects approximately 1 in 160 children between 5 and 17 years of age in the United States, data from the Tourette Association of America show. Research has shown that 85% of patients with Tourette syndrome will have a co-occurring psychiatric condition.
Guidelines recommend Comprehensive Behavioral Intervention for Tics (CBIT) as first-line treatment for Tourette syndrome, but cost and access are barriers. The only currently approved medications to treat Tourette syndrome are antipsychotics that act on the D2 receptor, but their use is limited by the potential for weight gain, metabolic changes, drug-induced movement disorders, and risk for suicidality, said Dr. Gilbert.
The D1AMOND study randomly assigned patients aged 6-17 years with Tourette syndrome and a Yale Global Tic Severity Total Tic Scale score of at least 20 to receive a target steady-state dose of 2 mg/kg/d of oral ecopipam or placebo for a 4-week titration period, followed by an 8-week treatment phase before being tapered off the study drug.
Patients were allowed to remain on medications without D2-receptor blocking activity for anxiety, OCD, and ADHD if the dosage was stable for 4 weeks before screening and not specifically prescribed for tics.
A mixed model for repeated measures was used to assess changes in several scales administered at baseline and at weeks 4, 6, 8, and 12: the Swanson, Nolan, and Pelham Teacher and Parent Rating Scale (SNAP-IV); Pediatric Anxiety Rating Scale; Children’s Yale-Brown Obsessive-Compulsive Scale (CY-BOCS), and Children’s Depression Rating Scale–Revised (CDRS-R).
In patients with a co-occurring psychiatric condition, no significant differences were found over time between ecopipam and placebo in terms of SNAP-IV (-4.4; P = .45), Pediatric Anxiety Rating Scale (1.0; P = .62), CDRS-R (-3.2; P = .65), or CY-BOCS (-0.7; P = .76) scores.
For ADHD, the most frequent comorbidity, scores trended lower in the ecopipam group but were not significantly different from those in the placebo group. “We found no evidence that ecopipam worsened ADHD symptoms,” Dr. Gilbert said.
No Weight Gain
Suicidal ideation was reported during the dosing period in eight patients in the placebo group and none in the ecopipam group. One patient treated with ecopipam had multiple depressive episodes and dropped out of the study on day 79. Ecopipam was discontinued in another patient because of anxiety.
Notably, there was more weight gain in the placebo group than in the ecopipam group (2.4 kg vs 1.8 kg) by 12 weeks. No shifts from baseline were seen in blood glucose, A1c, total cholesterol, or triglycerides in either group.
The lack of weight gain with ecopipam is important, Dr. Gilbert stressed. “Medicines that block D2 so often cause weight gain, and a lot of our patients, unfortunately, can be heavier already,” he explained. “We don’t want to make that worse or put them at a long-term risk of type 2 diabetes.”
For patients with more severe disease, we really “do need something else besides D2-blockers in our tool kit,” he added.
Commenting on the study, Tanya Simuni, MD, co-moderator of the session and director of the Parkinson’s Disease and Movement Disorders Center, Northwestern Feinberg School of Medicine, Chicago, said the aim of assessing D1-directed medications is to reduce the negative impact of traditional antipsychotics with a theoretical benefit on hyperkinetic movement.
But the most important thing that they’ve shown is that “there was no negative effect, no liability for the nonmotor manifestations of Tourette’s. That is important because Tourette’s is not a pure motor syndrome, and psychiatric manifestations in a lot of cases are associated with more disease-related quality of life impairment compared to the motor manifestations,” said Dr. Simuni.
That said, she noted, the “ideal drug would be the one that would have benefit for both motor and nonmotor domains.”
Multiple Agents in the Pipeline
“The neuropharmacology of Tourette syndrome has long remained stagnant, and most existing treatments often fail to balance efficacy with tolerability, underscoring the urgent need for newer therapeutics,” Christos Ganos, MD, professor of neurology, University of Toronto, said in a press release.
He noted that three studies have been published on ecopipam since 2014: an 8-week, open-label trial in adults with Tourette syndrome, a 4-week, placebo-controlled crossover trial in 38 children with Tourette syndrome, and the 12-week D1AMOND trial.
“These studies demonstrated clinically meaningful reductions in tics, without relevant safety concerns or changes in Tourette syndrome-typical neuropsychiatric measures, as also shown by the abstract highlighted here,” Dr. Ganos said.
“This emerging body of research provides a solid foundation for introducing ecopipam as a novel pharmacological agent to treat tics and may motivate further work, both on the pathophysiology and pharmacotherapy of tic disorders and their associations.”
A single-arm, phase 3 trial is currently underway at 58 centers in North America and Europe investigating the long-term safety and tolerability of ecopipam over 24 months in 150 children, adolescents, and adults with Tourette syndrome. The study is expected to be completed in 2027.
Several other new medications are also under investigation including the vesicular monoamine transporter (VMAT2) inhibitors tetrabenazine, deutetrabenazine, and valbenazine; the PEDE10A inhibitor gemlapodect; the allopregnanolone antagonist sepranolone; and SCI-110, which combines dronabinol (the synthetic form of tetrahydrocannabinol) and the endocannabinoid palmitoylethanolamide.
The study was funded by Emalex Biosciences. Dr. Gilbert’s institution received research support from Emalex Biosciences and PTC Therapeutics. Dr. Gilbert has received publishing royalties from a healthcare-related publication; compensation for serving as a medical expert with Teladoc; Advanced Medical; and the National Vaccine Injury Compensation Program, US Department of Health and Human Services. Simuni reports no relevant conflicts of interest. Dr. Ganos has received honoraria for educational activities from the Movement Disorder Society and academic research support from VolkswagenStiftung.
A version of this article first appeared on Medscape.com.
PHILADELPHIA — , results of a new analysis suggest.
As previously reported, the first-in-class dopamine-1 (D1) receptor antagonist reduced the primary endpoint of tic severity scores by 30% compared with placebo among 149 patients in the 12-week, phase 2b D1AMOND trial.
What was unknown, however, is whether ecopipam would affect the comorbidities of attention-deficit/hyperactivity disorder (ADHD), anxiety, obsessive-compulsive disorder (OCD), and depression that were present in two thirds of participants.
The two key findings in this post hoc analysis were “first, that patients with a nonmotor diagnosis like depression or ADHD did not do any worse in terms of tic efficacy; and second, we didn’t find any evidence that any of the nonmotor symptoms of Tourette’s got worse with ecopipam,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology at University of Cincinnati Children’s Hospital Medical Center.
Dr. Gilbert presented the results at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
No Worsening of ADHD Symptoms
Tourette syndrome affects approximately 1 in 160 children between 5 and 17 years of age in the United States, data from the Tourette Association of America show. Research has shown that 85% of patients with Tourette syndrome will have a co-occurring psychiatric condition.
Guidelines recommend Comprehensive Behavioral Intervention for Tics (CBIT) as first-line treatment for Tourette syndrome, but cost and access are barriers. The only currently approved medications to treat Tourette syndrome are antipsychotics that act on the D2 receptor, but their use is limited by the potential for weight gain, metabolic changes, drug-induced movement disorders, and risk for suicidality, said Dr. Gilbert.
The D1AMOND study randomly assigned patients aged 6-17 years with Tourette syndrome and a Yale Global Tic Severity Total Tic Scale score of at least 20 to receive a target steady-state dose of 2 mg/kg/d of oral ecopipam or placebo for a 4-week titration period, followed by an 8-week treatment phase before being tapered off the study drug.
Patients were allowed to remain on medications without D2-receptor blocking activity for anxiety, OCD, and ADHD if the dosage was stable for 4 weeks before screening and not specifically prescribed for tics.
A mixed model for repeated measures was used to assess changes in several scales administered at baseline and at weeks 4, 6, 8, and 12: the Swanson, Nolan, and Pelham Teacher and Parent Rating Scale (SNAP-IV); Pediatric Anxiety Rating Scale; Children’s Yale-Brown Obsessive-Compulsive Scale (CY-BOCS), and Children’s Depression Rating Scale–Revised (CDRS-R).
In patients with a co-occurring psychiatric condition, no significant differences were found over time between ecopipam and placebo in terms of SNAP-IV (-4.4; P = .45), Pediatric Anxiety Rating Scale (1.0; P = .62), CDRS-R (-3.2; P = .65), or CY-BOCS (-0.7; P = .76) scores.
For ADHD, the most frequent comorbidity, scores trended lower in the ecopipam group but were not significantly different from those in the placebo group. “We found no evidence that ecopipam worsened ADHD symptoms,” Dr. Gilbert said.
No Weight Gain
Suicidal ideation was reported during the dosing period in eight patients in the placebo group and none in the ecopipam group. One patient treated with ecopipam had multiple depressive episodes and dropped out of the study on day 79. Ecopipam was discontinued in another patient because of anxiety.
Notably, there was more weight gain in the placebo group than in the ecopipam group (2.4 kg vs 1.8 kg) by 12 weeks. No shifts from baseline were seen in blood glucose, A1c, total cholesterol, or triglycerides in either group.
The lack of weight gain with ecopipam is important, Dr. Gilbert stressed. “Medicines that block D2 so often cause weight gain, and a lot of our patients, unfortunately, can be heavier already,” he explained. “We don’t want to make that worse or put them at a long-term risk of type 2 diabetes.”
For patients with more severe disease, we really “do need something else besides D2-blockers in our tool kit,” he added.
Commenting on the study, Tanya Simuni, MD, co-moderator of the session and director of the Parkinson’s Disease and Movement Disorders Center, Northwestern Feinberg School of Medicine, Chicago, said the aim of assessing D1-directed medications is to reduce the negative impact of traditional antipsychotics with a theoretical benefit on hyperkinetic movement.
But the most important thing that they’ve shown is that “there was no negative effect, no liability for the nonmotor manifestations of Tourette’s. That is important because Tourette’s is not a pure motor syndrome, and psychiatric manifestations in a lot of cases are associated with more disease-related quality of life impairment compared to the motor manifestations,” said Dr. Simuni.
That said, she noted, the “ideal drug would be the one that would have benefit for both motor and nonmotor domains.”
Multiple Agents in the Pipeline
“The neuropharmacology of Tourette syndrome has long remained stagnant, and most existing treatments often fail to balance efficacy with tolerability, underscoring the urgent need for newer therapeutics,” Christos Ganos, MD, professor of neurology, University of Toronto, said in a press release.
He noted that three studies have been published on ecopipam since 2014: an 8-week, open-label trial in adults with Tourette syndrome, a 4-week, placebo-controlled crossover trial in 38 children with Tourette syndrome, and the 12-week D1AMOND trial.
“These studies demonstrated clinically meaningful reductions in tics, without relevant safety concerns or changes in Tourette syndrome-typical neuropsychiatric measures, as also shown by the abstract highlighted here,” Dr. Ganos said.
“This emerging body of research provides a solid foundation for introducing ecopipam as a novel pharmacological agent to treat tics and may motivate further work, both on the pathophysiology and pharmacotherapy of tic disorders and their associations.”
A single-arm, phase 3 trial is currently underway at 58 centers in North America and Europe investigating the long-term safety and tolerability of ecopipam over 24 months in 150 children, adolescents, and adults with Tourette syndrome. The study is expected to be completed in 2027.
Several other new medications are also under investigation including the vesicular monoamine transporter (VMAT2) inhibitors tetrabenazine, deutetrabenazine, and valbenazine; the PEDE10A inhibitor gemlapodect; the allopregnanolone antagonist sepranolone; and SCI-110, which combines dronabinol (the synthetic form of tetrahydrocannabinol) and the endocannabinoid palmitoylethanolamide.
The study was funded by Emalex Biosciences. Dr. Gilbert’s institution received research support from Emalex Biosciences and PTC Therapeutics. Dr. Gilbert has received publishing royalties from a healthcare-related publication; compensation for serving as a medical expert with Teladoc; Advanced Medical; and the National Vaccine Injury Compensation Program, US Department of Health and Human Services. Simuni reports no relevant conflicts of interest. Dr. Ganos has received honoraria for educational activities from the Movement Disorder Society and academic research support from VolkswagenStiftung.
A version of this article first appeared on Medscape.com.
FROM MDS 2024
Nighttime Outdoor Light Pollution Linked to Alzheimer’s Risk
a new national study suggested.
Analyses of state and county light pollution data and Medicare claims showed that areas with higher average nighttime light intensity had a greater prevalence of Alzheimer’s disease.
Among people aged 65 years or older, Alzheimer’s disease prevalence was more strongly associated with nightly light pollution exposure than with alcohol misuse, chronic kidney disease, depression, or obesity.
In those younger than 65 years, greater nighttime light intensity had a stronger association with Alzheimer’s disease prevalence than any other risk factor included in the study.
“The results are pretty striking when you do these comparisons and it’s true for people of all ages,” said Robin Voigt-Zuwala, PhD, lead author and director, Circadian Rhythm Research Laboratory, Rush University, Chicago, Illinois.
The study was published online in Frontiers of Neuroscience.
Shining a Light
Exposure to artificial outdoor light at night has been associated with adverse health effects such as sleep disruption, obesity, atherosclerosis, and cancer, but this is the first study to look specifically at Alzheimer’s disease, investigators noted.
Two recent studies reported higher risks for mild cognitive impairment among Chinese veterans and late-onset dementia among Italian residents living in areas with brighter outdoor light at night.
For this study, Dr. Voigt-Zuwala and colleagues examined the relationship between Alzheimer’s disease prevalence and average nighttime light intensity in the lower 48 states using data from Medicare Part A and B, the Centers for Disease Control and Prevention, and NASA satellite–acquired radiance data.
The data were averaged for the years 2012-2018 and states divided into five groups based on average nighttime light intensity.
The darkest states were Montana, Wyoming, South Dakota, Idaho, Maine, New Mexico, Vermont, Oregon, Utah, and Nevada. The brightest states were Indiana, Illinois, Florida, Ohio, Massachusetts, Connecticut, Maryland, Delaware, Rhode Island, and New Jersey.
Analysis of variance revealed a significant difference in Alzheimer’s disease prevalence between state groups (P < .0001). Multiple comparisons testing also showed that states with the lowest average nighttime light had significantly different Alzheimer’s disease prevalence than those with higher intensity.
The same positive relationship was observed when each year was assessed individually and at the county level, using data from 45 counties and the District of Columbia.
Strong Association
The investigators also found that state average nighttime light intensity is significantly associated with Alzheimer’s disease prevalence (P = .006). This effect was seen across all ages, sexes, and races except Asian Pacific Island, the latter possibly related to statistical power, the authors said.
When known or proposed risk factors for Alzheimer’s disease were added to the model, atrial fibrillation, diabetes, hyperlipidemia, hypertension, and stroke had a stronger association with Alzheimer’s disease than average nighttime light intensity.
Nighttime light intensity, however, was more strongly associated with Alzheimer’s disease prevalence than alcohol abuse, chronic kidney disease, depression, heart failure, and obesity.
Moreover, in people younger than 65 years, nighttime light pollution had a stronger association with Alzheimer’s disease prevalence than all other risk factors (P = .007).
The mechanism behind this increased vulnerability is unclear, but there may be an interplay between genetic susceptibility of an individual and how they respond to light, Dr. Voigt-Zuwala suggested.
“APOE4 is the genotype most highly associated with Alzheimer’s disease risk, and maybe the people who have that genotype are just more sensitive to the effects of light exposure at night, more sensitive to circadian rhythm disruption,” she said.
The authors noted that additional research is needed but suggested light pollution may also influence Alzheimer’s disease through sleep disruption, which can promote inflammation, activate microglia and astrocytes, and negatively alter the clearance of amyloid beta, and by decreasing the levels of brain-derived neurotrophic factor.
Are We Measuring the Right Light?
“It’s a good article and it’s got a good message, but I have some caveats to that,” said George C. Brainard, PhD, director, Light Research Program, Thomas Jefferson University in Philadelphia, Pennsylvania, and a pioneer in the study of how light affects biology including breast cancer in night-shift workers.
The biggest caveat, and one acknowledged by the authors, is that the study didn’t measure indoor light exposure and relied instead on satellite imaging.
“They’re very striking images, but they may not be particularly relevant. And here’s why: People don’t live outdoors all night,” Dr. Brainard said.
Instead, people spend much of their time at night indoors where they’re exposed to lighting in the home and from smartphones, laptops, and television screens.
“It doesn’t invalidate their work. It’s an important advancement, an important observation,” Dr. Brainard said. “But the important thing really is to find out what is the population exposed to that triggers this response, and it’s probably indoor lighting related to the amount and physical characteristics of indoor lighting. It doesn’t mean outdoor lighting can’t play a role. It certainly can.”
Reached for comment, Erik Musiek, MD, PhD, a professor of neurology whose lab at Washington University School of Medicine in St. Louis, Missouri, has extensively studied circadian clock disruption and Alzheimer’s disease pathology in the brain, said the study provides a 10,000-foot view of the issue.
For example, the study was not designed to detect whether people living in high light pollution areas are actually experiencing more outdoor light at night and if risk factors such as air pollution and low socioeconomic status may correlate with these areas.
“Most of what we worry about is do people have lights on in the house, do they have their TV on, their screens up to their face late at night? This can’t tell us about that,” Dr. Musiek said. “But on the other hand, this kind of light exposure is something that public policy can affect.”
“It’s hard to control people’s personal habits nor should we probably, but we can control what types of bulbs you put into streetlights, how bright they are, and where you put lighting in a public place,” he added. “So I do think there’s value there.”
At least 19 states, the District of Columbia, and Puerto Rico have laws in place to reduce light pollution, with the majority doing so to promote energy conservation, public safety, aesthetic interests, or astronomical research, according to the National Conference of State Legislatures.
To respond to some of the limitations in this study, Dr. Voigt-Zuwala is writing a grant application for a new project to look at both indoor and outdoor light exposure on an individual level.
“This is what I’ve been wanting to study for a long time, and this study is just sort of the stepping stone, the proof of concept that this is something we need to be investigating,” she said.
Dr. Voigt-Zuwala reported RO1 and R24 grants from the National Institutes of Health (NIH), one coauthor reported an NIH R24 grant; another reported having no conflicts of interest. Dr. Brainard reported having no relevant conflicts of interest. Dr. Musiek reported research funding from Eisai Pharmaceuticals.
A version of this article first appeared on Medscape.com.
a new national study suggested.
Analyses of state and county light pollution data and Medicare claims showed that areas with higher average nighttime light intensity had a greater prevalence of Alzheimer’s disease.
Among people aged 65 years or older, Alzheimer’s disease prevalence was more strongly associated with nightly light pollution exposure than with alcohol misuse, chronic kidney disease, depression, or obesity.
In those younger than 65 years, greater nighttime light intensity had a stronger association with Alzheimer’s disease prevalence than any other risk factor included in the study.
“The results are pretty striking when you do these comparisons and it’s true for people of all ages,” said Robin Voigt-Zuwala, PhD, lead author and director, Circadian Rhythm Research Laboratory, Rush University, Chicago, Illinois.
The study was published online in Frontiers of Neuroscience.
Shining a Light
Exposure to artificial outdoor light at night has been associated with adverse health effects such as sleep disruption, obesity, atherosclerosis, and cancer, but this is the first study to look specifically at Alzheimer’s disease, investigators noted.
Two recent studies reported higher risks for mild cognitive impairment among Chinese veterans and late-onset dementia among Italian residents living in areas with brighter outdoor light at night.
For this study, Dr. Voigt-Zuwala and colleagues examined the relationship between Alzheimer’s disease prevalence and average nighttime light intensity in the lower 48 states using data from Medicare Part A and B, the Centers for Disease Control and Prevention, and NASA satellite–acquired radiance data.
The data were averaged for the years 2012-2018 and states divided into five groups based on average nighttime light intensity.
The darkest states were Montana, Wyoming, South Dakota, Idaho, Maine, New Mexico, Vermont, Oregon, Utah, and Nevada. The brightest states were Indiana, Illinois, Florida, Ohio, Massachusetts, Connecticut, Maryland, Delaware, Rhode Island, and New Jersey.
Analysis of variance revealed a significant difference in Alzheimer’s disease prevalence between state groups (P < .0001). Multiple comparisons testing also showed that states with the lowest average nighttime light had significantly different Alzheimer’s disease prevalence than those with higher intensity.
The same positive relationship was observed when each year was assessed individually and at the county level, using data from 45 counties and the District of Columbia.
Strong Association
The investigators also found that state average nighttime light intensity is significantly associated with Alzheimer’s disease prevalence (P = .006). This effect was seen across all ages, sexes, and races except Asian Pacific Island, the latter possibly related to statistical power, the authors said.
When known or proposed risk factors for Alzheimer’s disease were added to the model, atrial fibrillation, diabetes, hyperlipidemia, hypertension, and stroke had a stronger association with Alzheimer’s disease than average nighttime light intensity.
Nighttime light intensity, however, was more strongly associated with Alzheimer’s disease prevalence than alcohol abuse, chronic kidney disease, depression, heart failure, and obesity.
Moreover, in people younger than 65 years, nighttime light pollution had a stronger association with Alzheimer’s disease prevalence than all other risk factors (P = .007).
The mechanism behind this increased vulnerability is unclear, but there may be an interplay between genetic susceptibility of an individual and how they respond to light, Dr. Voigt-Zuwala suggested.
“APOE4 is the genotype most highly associated with Alzheimer’s disease risk, and maybe the people who have that genotype are just more sensitive to the effects of light exposure at night, more sensitive to circadian rhythm disruption,” she said.
The authors noted that additional research is needed but suggested light pollution may also influence Alzheimer’s disease through sleep disruption, which can promote inflammation, activate microglia and astrocytes, and negatively alter the clearance of amyloid beta, and by decreasing the levels of brain-derived neurotrophic factor.
Are We Measuring the Right Light?
“It’s a good article and it’s got a good message, but I have some caveats to that,” said George C. Brainard, PhD, director, Light Research Program, Thomas Jefferson University in Philadelphia, Pennsylvania, and a pioneer in the study of how light affects biology including breast cancer in night-shift workers.
The biggest caveat, and one acknowledged by the authors, is that the study didn’t measure indoor light exposure and relied instead on satellite imaging.
“They’re very striking images, but they may not be particularly relevant. And here’s why: People don’t live outdoors all night,” Dr. Brainard said.
Instead, people spend much of their time at night indoors where they’re exposed to lighting in the home and from smartphones, laptops, and television screens.
“It doesn’t invalidate their work. It’s an important advancement, an important observation,” Dr. Brainard said. “But the important thing really is to find out what is the population exposed to that triggers this response, and it’s probably indoor lighting related to the amount and physical characteristics of indoor lighting. It doesn’t mean outdoor lighting can’t play a role. It certainly can.”
Reached for comment, Erik Musiek, MD, PhD, a professor of neurology whose lab at Washington University School of Medicine in St. Louis, Missouri, has extensively studied circadian clock disruption and Alzheimer’s disease pathology in the brain, said the study provides a 10,000-foot view of the issue.
For example, the study was not designed to detect whether people living in high light pollution areas are actually experiencing more outdoor light at night and if risk factors such as air pollution and low socioeconomic status may correlate with these areas.
“Most of what we worry about is do people have lights on in the house, do they have their TV on, their screens up to their face late at night? This can’t tell us about that,” Dr. Musiek said. “But on the other hand, this kind of light exposure is something that public policy can affect.”
“It’s hard to control people’s personal habits nor should we probably, but we can control what types of bulbs you put into streetlights, how bright they are, and where you put lighting in a public place,” he added. “So I do think there’s value there.”
At least 19 states, the District of Columbia, and Puerto Rico have laws in place to reduce light pollution, with the majority doing so to promote energy conservation, public safety, aesthetic interests, or astronomical research, according to the National Conference of State Legislatures.
To respond to some of the limitations in this study, Dr. Voigt-Zuwala is writing a grant application for a new project to look at both indoor and outdoor light exposure on an individual level.
“This is what I’ve been wanting to study for a long time, and this study is just sort of the stepping stone, the proof of concept that this is something we need to be investigating,” she said.
Dr. Voigt-Zuwala reported RO1 and R24 grants from the National Institutes of Health (NIH), one coauthor reported an NIH R24 grant; another reported having no conflicts of interest. Dr. Brainard reported having no relevant conflicts of interest. Dr. Musiek reported research funding from Eisai Pharmaceuticals.
A version of this article first appeared on Medscape.com.
a new national study suggested.
Analyses of state and county light pollution data and Medicare claims showed that areas with higher average nighttime light intensity had a greater prevalence of Alzheimer’s disease.
Among people aged 65 years or older, Alzheimer’s disease prevalence was more strongly associated with nightly light pollution exposure than with alcohol misuse, chronic kidney disease, depression, or obesity.
In those younger than 65 years, greater nighttime light intensity had a stronger association with Alzheimer’s disease prevalence than any other risk factor included in the study.
“The results are pretty striking when you do these comparisons and it’s true for people of all ages,” said Robin Voigt-Zuwala, PhD, lead author and director, Circadian Rhythm Research Laboratory, Rush University, Chicago, Illinois.
The study was published online in Frontiers of Neuroscience.
Shining a Light
Exposure to artificial outdoor light at night has been associated with adverse health effects such as sleep disruption, obesity, atherosclerosis, and cancer, but this is the first study to look specifically at Alzheimer’s disease, investigators noted.
Two recent studies reported higher risks for mild cognitive impairment among Chinese veterans and late-onset dementia among Italian residents living in areas with brighter outdoor light at night.
For this study, Dr. Voigt-Zuwala and colleagues examined the relationship between Alzheimer’s disease prevalence and average nighttime light intensity in the lower 48 states using data from Medicare Part A and B, the Centers for Disease Control and Prevention, and NASA satellite–acquired radiance data.
The data were averaged for the years 2012-2018 and states divided into five groups based on average nighttime light intensity.
The darkest states were Montana, Wyoming, South Dakota, Idaho, Maine, New Mexico, Vermont, Oregon, Utah, and Nevada. The brightest states were Indiana, Illinois, Florida, Ohio, Massachusetts, Connecticut, Maryland, Delaware, Rhode Island, and New Jersey.
Analysis of variance revealed a significant difference in Alzheimer’s disease prevalence between state groups (P < .0001). Multiple comparisons testing also showed that states with the lowest average nighttime light had significantly different Alzheimer’s disease prevalence than those with higher intensity.
The same positive relationship was observed when each year was assessed individually and at the county level, using data from 45 counties and the District of Columbia.
Strong Association
The investigators also found that state average nighttime light intensity is significantly associated with Alzheimer’s disease prevalence (P = .006). This effect was seen across all ages, sexes, and races except Asian Pacific Island, the latter possibly related to statistical power, the authors said.
When known or proposed risk factors for Alzheimer’s disease were added to the model, atrial fibrillation, diabetes, hyperlipidemia, hypertension, and stroke had a stronger association with Alzheimer’s disease than average nighttime light intensity.
Nighttime light intensity, however, was more strongly associated with Alzheimer’s disease prevalence than alcohol abuse, chronic kidney disease, depression, heart failure, and obesity.
Moreover, in people younger than 65 years, nighttime light pollution had a stronger association with Alzheimer’s disease prevalence than all other risk factors (P = .007).
The mechanism behind this increased vulnerability is unclear, but there may be an interplay between genetic susceptibility of an individual and how they respond to light, Dr. Voigt-Zuwala suggested.
“APOE4 is the genotype most highly associated with Alzheimer’s disease risk, and maybe the people who have that genotype are just more sensitive to the effects of light exposure at night, more sensitive to circadian rhythm disruption,” she said.
The authors noted that additional research is needed but suggested light pollution may also influence Alzheimer’s disease through sleep disruption, which can promote inflammation, activate microglia and astrocytes, and negatively alter the clearance of amyloid beta, and by decreasing the levels of brain-derived neurotrophic factor.
Are We Measuring the Right Light?
“It’s a good article and it’s got a good message, but I have some caveats to that,” said George C. Brainard, PhD, director, Light Research Program, Thomas Jefferson University in Philadelphia, Pennsylvania, and a pioneer in the study of how light affects biology including breast cancer in night-shift workers.
The biggest caveat, and one acknowledged by the authors, is that the study didn’t measure indoor light exposure and relied instead on satellite imaging.
“They’re very striking images, but they may not be particularly relevant. And here’s why: People don’t live outdoors all night,” Dr. Brainard said.
Instead, people spend much of their time at night indoors where they’re exposed to lighting in the home and from smartphones, laptops, and television screens.
“It doesn’t invalidate their work. It’s an important advancement, an important observation,” Dr. Brainard said. “But the important thing really is to find out what is the population exposed to that triggers this response, and it’s probably indoor lighting related to the amount and physical characteristics of indoor lighting. It doesn’t mean outdoor lighting can’t play a role. It certainly can.”
Reached for comment, Erik Musiek, MD, PhD, a professor of neurology whose lab at Washington University School of Medicine in St. Louis, Missouri, has extensively studied circadian clock disruption and Alzheimer’s disease pathology in the brain, said the study provides a 10,000-foot view of the issue.
For example, the study was not designed to detect whether people living in high light pollution areas are actually experiencing more outdoor light at night and if risk factors such as air pollution and low socioeconomic status may correlate with these areas.
“Most of what we worry about is do people have lights on in the house, do they have their TV on, their screens up to their face late at night? This can’t tell us about that,” Dr. Musiek said. “But on the other hand, this kind of light exposure is something that public policy can affect.”
“It’s hard to control people’s personal habits nor should we probably, but we can control what types of bulbs you put into streetlights, how bright they are, and where you put lighting in a public place,” he added. “So I do think there’s value there.”
At least 19 states, the District of Columbia, and Puerto Rico have laws in place to reduce light pollution, with the majority doing so to promote energy conservation, public safety, aesthetic interests, or astronomical research, according to the National Conference of State Legislatures.
To respond to some of the limitations in this study, Dr. Voigt-Zuwala is writing a grant application for a new project to look at both indoor and outdoor light exposure on an individual level.
“This is what I’ve been wanting to study for a long time, and this study is just sort of the stepping stone, the proof of concept that this is something we need to be investigating,” she said.
Dr. Voigt-Zuwala reported RO1 and R24 grants from the National Institutes of Health (NIH), one coauthor reported an NIH R24 grant; another reported having no conflicts of interest. Dr. Brainard reported having no relevant conflicts of interest. Dr. Musiek reported research funding from Eisai Pharmaceuticals.
A version of this article first appeared on Medscape.com.
FROM FRONTIERS OF NEUROSCIENCE
New Biological Pathway May Explain BPA Exposure, Autism Link
BPA is a potent endocrine disruptor found in polycarbonate plastics and epoxy resins and has been banned by the Food and Drug Administration for use in baby bottles, sippy cups, and infant formula packaging.
“Exposure to BPA has already been shown in some studies to be associated with subsequent autism in offspring,” lead researcher Anne-Louise Ponsonby, PhD, The Florey Institute, Heidelberg, Australia, said in a statement.
“Our work is important because it demonstrates one of the biological mechanisms potentially involved. BPA can disrupt hormone-controlled male fetal brain development in several ways, including silencing a key enzyme, aromatase, that controls neurohormones and is especially important in fetal male brain development. This appears to be part of the autism puzzle,” she said.
Brain aromatase, encoded by CYP19A1, converts neural androgens to neural estrogens and has been implicated in ASD. Postmortem analyses of men with ASD also show markedly reduced aromatase activity.
The findings were published online in Nature Communications.
New Biological Mechanism
For the study, the researchers analyzed data from the Barwon Infant Study in 1067 infants in Australia. At age 7-11 years, 43 children had a confirmed ASD diagnosis, and 249 infants with Child Behavior Checklist (CBCL) data at age 2 years had an autism spectrum problem score above the median.
The researchers developed a CYP19A1 genetic score for aromatase activity based on five single nucleotide polymorphisms associated with lower estrogen levels. Among 595 children with prenatal BPA and CBCL, those with three or more variants were classified as “low aromatase activity” and the remaining were classified as “high.”
In regression analyses, boys with low aromatase activity and high prenatal BPA exposure (top quartile > 2.18 µg/L) were 3.5 times more likely to have autism symptoms at age 2 years (odds ratio [OR], 3.56; 95% CI, 1.13-11.22).
The odds of a confirmed ASD diagnosis were six times higher at age 9 years only in men with low aromatase activity (OR, 6.24; 95% CI, 1.02-38.26).
The researchers also found that higher BPA levels predicted higher methylation in cord blood across the CYP19A1 brain promoter PI.f region (P = .009).
To replicate the findings, data were used from the Columbia Centre for Children’s Health Study–Mothers and Newborns cohort in the United States. Once again, the BPA level was associated with hypermethylation of the aromatase brain promoter PI.f (P = .0089).
In both cohorts, there was evidence that the effect of increased BPA on brain-derived neurotrophic factor hypermethylation was mediated partly through higher aromatase gene methylation (P = .001).
To validate the findings, the researchers examined human neuroblastoma SH-SY5Y cell lines and found aromatase protein levels were more than halved in the presence of BPA 50 µg/L (P = .01).
Additionally, mouse studies showed that male mice exposed to BPA 50 µg/L mid-gestation and male aromatase knockout mice — but not female mice — had social behavior deficits, such as interacting with a strange mouse, as well as structural and functional brain changes.
“We found that BPA suppresses the aromatase enzyme and is associated with anatomical, neurologic, and behavioral changes in the male mice that may be consistent with autism spectrum disorder,” Wah Chin Boon, PhD, co–lead researcher and research fellow, also with The Florey Institute, said in a statement.
“This is the first time a biological pathway has been identified that might help explain the connection between autism and BPA,” she said.
“In this study, not only were the levels of BPA higher than most people would be exposed to, but in at least one of the experiments the mice were injected with BPA directly, whereas humans would be exposed via food and drink,” observed Oliver Jones, PhD, MSc, professor of chemistry, RMIT University, Melbourne, Australia. “If you ingest the food, it undergoes metabolism before it gets to the bloodstream, which reduces the effective dose.”
Dr. Jones said further studies with larger numbers of participants measuring BPA throughout pregnancy and other chemicals the mother and child were exposed to are needed to be sure of any such link. “Just because there is a possible mechanism in place does not automatically mean that it is activated,” he said.
Dr. Ponsonby pointed out that BPA and other endocrine-disrupting chemicals are “almost impossible for individuals to avoid” and can enter the body through plastic food and drink packaging, home renovation fumes, and sources such as cosmetics.
Fatty Acid Helpful?
Building on earlier observations that 10-hydroxy-2-decenoic acid (10HDA) may have estrogenic modulating activities, the researchers conducted additional studies suggesting that 10HDA may be effective as a competitive ligand that could counteract the effects of BPA on estrogen signaling within cells.
Further, among 3-week-old mice pups prenatally exposed to BPA, daily injections of 10HDA for 3 weeks showed striking and significant improvements in social interaction. Stopping 10HDA resulted in a deficit in social interaction that was again ameliorated by subsequent 10HDA treatment.
“10-hydroxy-2-decenoic acid shows early indications of potential in activating opposing biological pathways to improve autism-like characteristics when administered to animals that have been prenatally exposed to BPA,” Dr. Boon said. “It warrants further studies to see whether this potential treatment could be realized in humans.”
Reached for comment, Dr. Jones said “the human studies are not strong at all,” in large part because BPA levels were tested only once at 36 weeks in the BIS cohort.
“I would argue that if BPA is in the urine, it has been excreted and is no longer in the bloodstream, thus not able to affect the child,” he said. “I’d also argue that a single measurement at 36 weeks cannot give you any idea of the mother’s exposure to BPA over the rest of the pregnancy or what the child was exposed to after birth.”
The study was funded by the Minderoo Foundation, the National Health and Medical Research Council of Australia, the Australian Research Council, and numerous other sponsors. Dr. Boon is a coinventor on “Methods of treating neurodevelopmental diseases and disorders” and is a board member of Meizon Innovation Holdings. Dr. Ponsonby is a scientific adviser to Meizon Innovation Holdings. The remaining authors declared no competing interests.
A version of this article first appeared on Medscape.com.
BPA is a potent endocrine disruptor found in polycarbonate plastics and epoxy resins and has been banned by the Food and Drug Administration for use in baby bottles, sippy cups, and infant formula packaging.
“Exposure to BPA has already been shown in some studies to be associated with subsequent autism in offspring,” lead researcher Anne-Louise Ponsonby, PhD, The Florey Institute, Heidelberg, Australia, said in a statement.
“Our work is important because it demonstrates one of the biological mechanisms potentially involved. BPA can disrupt hormone-controlled male fetal brain development in several ways, including silencing a key enzyme, aromatase, that controls neurohormones and is especially important in fetal male brain development. This appears to be part of the autism puzzle,” she said.
Brain aromatase, encoded by CYP19A1, converts neural androgens to neural estrogens and has been implicated in ASD. Postmortem analyses of men with ASD also show markedly reduced aromatase activity.
The findings were published online in Nature Communications.
New Biological Mechanism
For the study, the researchers analyzed data from the Barwon Infant Study in 1067 infants in Australia. At age 7-11 years, 43 children had a confirmed ASD diagnosis, and 249 infants with Child Behavior Checklist (CBCL) data at age 2 years had an autism spectrum problem score above the median.
The researchers developed a CYP19A1 genetic score for aromatase activity based on five single nucleotide polymorphisms associated with lower estrogen levels. Among 595 children with prenatal BPA and CBCL, those with three or more variants were classified as “low aromatase activity” and the remaining were classified as “high.”
In regression analyses, boys with low aromatase activity and high prenatal BPA exposure (top quartile > 2.18 µg/L) were 3.5 times more likely to have autism symptoms at age 2 years (odds ratio [OR], 3.56; 95% CI, 1.13-11.22).
The odds of a confirmed ASD diagnosis were six times higher at age 9 years only in men with low aromatase activity (OR, 6.24; 95% CI, 1.02-38.26).
The researchers also found that higher BPA levels predicted higher methylation in cord blood across the CYP19A1 brain promoter PI.f region (P = .009).
To replicate the findings, data were used from the Columbia Centre for Children’s Health Study–Mothers and Newborns cohort in the United States. Once again, the BPA level was associated with hypermethylation of the aromatase brain promoter PI.f (P = .0089).
In both cohorts, there was evidence that the effect of increased BPA on brain-derived neurotrophic factor hypermethylation was mediated partly through higher aromatase gene methylation (P = .001).
To validate the findings, the researchers examined human neuroblastoma SH-SY5Y cell lines and found aromatase protein levels were more than halved in the presence of BPA 50 µg/L (P = .01).
Additionally, mouse studies showed that male mice exposed to BPA 50 µg/L mid-gestation and male aromatase knockout mice — but not female mice — had social behavior deficits, such as interacting with a strange mouse, as well as structural and functional brain changes.
“We found that BPA suppresses the aromatase enzyme and is associated with anatomical, neurologic, and behavioral changes in the male mice that may be consistent with autism spectrum disorder,” Wah Chin Boon, PhD, co–lead researcher and research fellow, also with The Florey Institute, said in a statement.
“This is the first time a biological pathway has been identified that might help explain the connection between autism and BPA,” she said.
“In this study, not only were the levels of BPA higher than most people would be exposed to, but in at least one of the experiments the mice were injected with BPA directly, whereas humans would be exposed via food and drink,” observed Oliver Jones, PhD, MSc, professor of chemistry, RMIT University, Melbourne, Australia. “If you ingest the food, it undergoes metabolism before it gets to the bloodstream, which reduces the effective dose.”
Dr. Jones said further studies with larger numbers of participants measuring BPA throughout pregnancy and other chemicals the mother and child were exposed to are needed to be sure of any such link. “Just because there is a possible mechanism in place does not automatically mean that it is activated,” he said.
Dr. Ponsonby pointed out that BPA and other endocrine-disrupting chemicals are “almost impossible for individuals to avoid” and can enter the body through plastic food and drink packaging, home renovation fumes, and sources such as cosmetics.
Fatty Acid Helpful?
Building on earlier observations that 10-hydroxy-2-decenoic acid (10HDA) may have estrogenic modulating activities, the researchers conducted additional studies suggesting that 10HDA may be effective as a competitive ligand that could counteract the effects of BPA on estrogen signaling within cells.
Further, among 3-week-old mice pups prenatally exposed to BPA, daily injections of 10HDA for 3 weeks showed striking and significant improvements in social interaction. Stopping 10HDA resulted in a deficit in social interaction that was again ameliorated by subsequent 10HDA treatment.
“10-hydroxy-2-decenoic acid shows early indications of potential in activating opposing biological pathways to improve autism-like characteristics when administered to animals that have been prenatally exposed to BPA,” Dr. Boon said. “It warrants further studies to see whether this potential treatment could be realized in humans.”
Reached for comment, Dr. Jones said “the human studies are not strong at all,” in large part because BPA levels were tested only once at 36 weeks in the BIS cohort.
“I would argue that if BPA is in the urine, it has been excreted and is no longer in the bloodstream, thus not able to affect the child,” he said. “I’d also argue that a single measurement at 36 weeks cannot give you any idea of the mother’s exposure to BPA over the rest of the pregnancy or what the child was exposed to after birth.”
The study was funded by the Minderoo Foundation, the National Health and Medical Research Council of Australia, the Australian Research Council, and numerous other sponsors. Dr. Boon is a coinventor on “Methods of treating neurodevelopmental diseases and disorders” and is a board member of Meizon Innovation Holdings. Dr. Ponsonby is a scientific adviser to Meizon Innovation Holdings. The remaining authors declared no competing interests.
A version of this article first appeared on Medscape.com.
BPA is a potent endocrine disruptor found in polycarbonate plastics and epoxy resins and has been banned by the Food and Drug Administration for use in baby bottles, sippy cups, and infant formula packaging.
“Exposure to BPA has already been shown in some studies to be associated with subsequent autism in offspring,” lead researcher Anne-Louise Ponsonby, PhD, The Florey Institute, Heidelberg, Australia, said in a statement.
“Our work is important because it demonstrates one of the biological mechanisms potentially involved. BPA can disrupt hormone-controlled male fetal brain development in several ways, including silencing a key enzyme, aromatase, that controls neurohormones and is especially important in fetal male brain development. This appears to be part of the autism puzzle,” she said.
Brain aromatase, encoded by CYP19A1, converts neural androgens to neural estrogens and has been implicated in ASD. Postmortem analyses of men with ASD also show markedly reduced aromatase activity.
The findings were published online in Nature Communications.
New Biological Mechanism
For the study, the researchers analyzed data from the Barwon Infant Study in 1067 infants in Australia. At age 7-11 years, 43 children had a confirmed ASD diagnosis, and 249 infants with Child Behavior Checklist (CBCL) data at age 2 years had an autism spectrum problem score above the median.
The researchers developed a CYP19A1 genetic score for aromatase activity based on five single nucleotide polymorphisms associated with lower estrogen levels. Among 595 children with prenatal BPA and CBCL, those with three or more variants were classified as “low aromatase activity” and the remaining were classified as “high.”
In regression analyses, boys with low aromatase activity and high prenatal BPA exposure (top quartile > 2.18 µg/L) were 3.5 times more likely to have autism symptoms at age 2 years (odds ratio [OR], 3.56; 95% CI, 1.13-11.22).
The odds of a confirmed ASD diagnosis were six times higher at age 9 years only in men with low aromatase activity (OR, 6.24; 95% CI, 1.02-38.26).
The researchers also found that higher BPA levels predicted higher methylation in cord blood across the CYP19A1 brain promoter PI.f region (P = .009).
To replicate the findings, data were used from the Columbia Centre for Children’s Health Study–Mothers and Newborns cohort in the United States. Once again, the BPA level was associated with hypermethylation of the aromatase brain promoter PI.f (P = .0089).
In both cohorts, there was evidence that the effect of increased BPA on brain-derived neurotrophic factor hypermethylation was mediated partly through higher aromatase gene methylation (P = .001).
To validate the findings, the researchers examined human neuroblastoma SH-SY5Y cell lines and found aromatase protein levels were more than halved in the presence of BPA 50 µg/L (P = .01).
Additionally, mouse studies showed that male mice exposed to BPA 50 µg/L mid-gestation and male aromatase knockout mice — but not female mice — had social behavior deficits, such as interacting with a strange mouse, as well as structural and functional brain changes.
“We found that BPA suppresses the aromatase enzyme and is associated with anatomical, neurologic, and behavioral changes in the male mice that may be consistent with autism spectrum disorder,” Wah Chin Boon, PhD, co–lead researcher and research fellow, also with The Florey Institute, said in a statement.
“This is the first time a biological pathway has been identified that might help explain the connection between autism and BPA,” she said.
“In this study, not only were the levels of BPA higher than most people would be exposed to, but in at least one of the experiments the mice were injected with BPA directly, whereas humans would be exposed via food and drink,” observed Oliver Jones, PhD, MSc, professor of chemistry, RMIT University, Melbourne, Australia. “If you ingest the food, it undergoes metabolism before it gets to the bloodstream, which reduces the effective dose.”
Dr. Jones said further studies with larger numbers of participants measuring BPA throughout pregnancy and other chemicals the mother and child were exposed to are needed to be sure of any such link. “Just because there is a possible mechanism in place does not automatically mean that it is activated,” he said.
Dr. Ponsonby pointed out that BPA and other endocrine-disrupting chemicals are “almost impossible for individuals to avoid” and can enter the body through plastic food and drink packaging, home renovation fumes, and sources such as cosmetics.
Fatty Acid Helpful?
Building on earlier observations that 10-hydroxy-2-decenoic acid (10HDA) may have estrogenic modulating activities, the researchers conducted additional studies suggesting that 10HDA may be effective as a competitive ligand that could counteract the effects of BPA on estrogen signaling within cells.
Further, among 3-week-old mice pups prenatally exposed to BPA, daily injections of 10HDA for 3 weeks showed striking and significant improvements in social interaction. Stopping 10HDA resulted in a deficit in social interaction that was again ameliorated by subsequent 10HDA treatment.
“10-hydroxy-2-decenoic acid shows early indications of potential in activating opposing biological pathways to improve autism-like characteristics when administered to animals that have been prenatally exposed to BPA,” Dr. Boon said. “It warrants further studies to see whether this potential treatment could be realized in humans.”
Reached for comment, Dr. Jones said “the human studies are not strong at all,” in large part because BPA levels were tested only once at 36 weeks in the BIS cohort.
“I would argue that if BPA is in the urine, it has been excreted and is no longer in the bloodstream, thus not able to affect the child,” he said. “I’d also argue that a single measurement at 36 weeks cannot give you any idea of the mother’s exposure to BPA over the rest of the pregnancy or what the child was exposed to after birth.”
The study was funded by the Minderoo Foundation, the National Health and Medical Research Council of Australia, the Australian Research Council, and numerous other sponsors. Dr. Boon is a coinventor on “Methods of treating neurodevelopmental diseases and disorders” and is a board member of Meizon Innovation Holdings. Dr. Ponsonby is a scientific adviser to Meizon Innovation Holdings. The remaining authors declared no competing interests.
A version of this article first appeared on Medscape.com.
FROM NATURE COMMUNICATIONS
More Evidence PTSD Tied to Obstructive Sleep Apnea Risk
Posttraumatic stress disorder (PTSD) may enhance the risk for obstructive sleep apnea (OSA) in older male veterans, the results of a cross-sectional twin study suggested. However, additional high-quality research is needed and may yield important mechanistic insights into both conditions and improve treatment, experts said.
“The strength of the association was a bit surprising,” said study investigator Amit J. Shah, MD, MSCR, Emory University, Atlanta, Georgia. “Many physicians and scientists may otherwise assume that the relationship between PTSD and sleep apnea would be primarily mediated by obesity, but we did not find that obesity explained our findings.”
The study was published online in JAMA Network Open.
A More Rigorous Evaluation
“Prior studies have shown an association between PTSD and sleep apnea, but the size of the association was not as strong,” Dr. Shah said, possibly because many were based on symptomatic patients referred for clinical evaluation of OSA and some relied on self-report of a sleep apnea diagnosis.
The current study involved 181 male twins, aged 61-71 years, including 66 pairs discordant for PTSD symptoms and 15 pairs discordant for PTSD diagnosis, who were recruited from the Vietnam Era Twin Registry and underwent a formal psychiatric and polysomnography evaluation as follow-up of the Emory Twin Study.
PTSD symptom severity was assessed using the self-administered Posttraumatic Stress Disorder Checklist (PCL). OSA was mild in 74% of participants, moderate to severe in 40%, and severe in 18%.
The mean apnea-hypopnea index (AHI) was 17.7 events per hour, and the mean proportion of the night with SaO2 less than 90% was 8.9%.
In fully adjusted models, each 15-point within-pair difference in PCL score was associated with a 4.6 events-per-hour higher AHI, a 6.4 events-per-hour higher oxygen desaturation index, and a 4.8% greater sleep duration with SaO2 less than 90%.
A current PTSD diagnosis is associated with an approximate 10-unit higher adjusted AHI in separate models involving potential cardiovascular mediators (10.5-unit; 95% CI, 5.7-15.3) and sociodemographic and psychiatric confounders (10.7-unit; 95% CI, 4.0-17.4).
The investigators called for more research into the underlying mechanisms but speculated that pharyngeal collapsibility and exaggerated loop gain, among others, may play a role.
“Our findings broaden the concept of OSA as one that may involve stress pathways in addition to the traditional mechanisms involving airway collapse and obesity,” Dr. Shah said. “We should be more suspicious of OSA as an important comorbidity in PTSD, given the high OSA prevalence that we found in PTSD veterans.”
Questions Remain
In an accompanying editorial, Steven H. Woodward, PhD, and Ruth M. Benca, MD, PhD, VA Palo Alto Health Care Systems, Palo Alto, California, noted the study affirmatively answers the decades-old question of whether rates of OSA are elevated in PTSD and “eliminates many potential confounders that might cast doubt on the PTSD-OSA association.”
However, they noted, it’s difficult to ascertain the directionality of this association and point out that, in terms of potential mechanisms, the oft-cited 1994 study linking sleep fragmentation with upper airway collapsibility has never been replicated and that a recent study found no difference in airway collapsibility or evidence of differential loop gain in combat veterans with and without PTSD.
Dr. Woodward and Dr. Benca also highlighted the large body of evidence that psychiatric disorders such as bipolar disorder, schizophrenia, and, in particular, major depressive disorder, are strongly associated with higher rates of OSA.
“In sum, we do not believe that a fair reading of the current literature supports a conclusion that PTSD bears an association with OSA that does not overlap with those manifested by other psychiatric disorders,” they wrote.
“This commentary is not intended to discourage any specific line of inquiry. Rather, we seek to keep the door open as wide as possible to hypotheses and research designs aimed at elucidating the relationships between OSA and psychiatric disorders,” Dr. Woodward and Dr. Benca concluded.
In response, Dr. Shah said the editorialists’ “point about psychiatric conditions other than PTSD also being important in OSA is well taken. In our own cohort, we did not see such an association, but that does not mean that this does not exist.
“Autonomic physiology, which we plan to study next, may underlie not only the PTSD-OSA relationship but also the relationship between other psychiatric factors and OSA,” he added.
The study was funded by grants from the National Institutes of Health (NIH). One study author reported receiving personal fees from Idorsia, and another reported receiving personal fees from Clinilabs, Eisai, Ferring Pharmaceuticals, Huxley, Idorsia, and Merck Sharp & Dohme. Dr. Benca reported receiving grants from the NIH and Eisai and personal fees from Eisai, Idorsia, Haleon, and Sage Therapeutics. Dr. Woodward reported having no relevant conflicts of interest.
A version of this article first appeared on Medscape.com.
Posttraumatic stress disorder (PTSD) may enhance the risk for obstructive sleep apnea (OSA) in older male veterans, the results of a cross-sectional twin study suggested. However, additional high-quality research is needed and may yield important mechanistic insights into both conditions and improve treatment, experts said.
“The strength of the association was a bit surprising,” said study investigator Amit J. Shah, MD, MSCR, Emory University, Atlanta, Georgia. “Many physicians and scientists may otherwise assume that the relationship between PTSD and sleep apnea would be primarily mediated by obesity, but we did not find that obesity explained our findings.”
The study was published online in JAMA Network Open.
A More Rigorous Evaluation
“Prior studies have shown an association between PTSD and sleep apnea, but the size of the association was not as strong,” Dr. Shah said, possibly because many were based on symptomatic patients referred for clinical evaluation of OSA and some relied on self-report of a sleep apnea diagnosis.
The current study involved 181 male twins, aged 61-71 years, including 66 pairs discordant for PTSD symptoms and 15 pairs discordant for PTSD diagnosis, who were recruited from the Vietnam Era Twin Registry and underwent a formal psychiatric and polysomnography evaluation as follow-up of the Emory Twin Study.
PTSD symptom severity was assessed using the self-administered Posttraumatic Stress Disorder Checklist (PCL). OSA was mild in 74% of participants, moderate to severe in 40%, and severe in 18%.
The mean apnea-hypopnea index (AHI) was 17.7 events per hour, and the mean proportion of the night with SaO2 less than 90% was 8.9%.
In fully adjusted models, each 15-point within-pair difference in PCL score was associated with a 4.6 events-per-hour higher AHI, a 6.4 events-per-hour higher oxygen desaturation index, and a 4.8% greater sleep duration with SaO2 less than 90%.
A current PTSD diagnosis is associated with an approximate 10-unit higher adjusted AHI in separate models involving potential cardiovascular mediators (10.5-unit; 95% CI, 5.7-15.3) and sociodemographic and psychiatric confounders (10.7-unit; 95% CI, 4.0-17.4).
The investigators called for more research into the underlying mechanisms but speculated that pharyngeal collapsibility and exaggerated loop gain, among others, may play a role.
“Our findings broaden the concept of OSA as one that may involve stress pathways in addition to the traditional mechanisms involving airway collapse and obesity,” Dr. Shah said. “We should be more suspicious of OSA as an important comorbidity in PTSD, given the high OSA prevalence that we found in PTSD veterans.”
Questions Remain
In an accompanying editorial, Steven H. Woodward, PhD, and Ruth M. Benca, MD, PhD, VA Palo Alto Health Care Systems, Palo Alto, California, noted the study affirmatively answers the decades-old question of whether rates of OSA are elevated in PTSD and “eliminates many potential confounders that might cast doubt on the PTSD-OSA association.”
However, they noted, it’s difficult to ascertain the directionality of this association and point out that, in terms of potential mechanisms, the oft-cited 1994 study linking sleep fragmentation with upper airway collapsibility has never been replicated and that a recent study found no difference in airway collapsibility or evidence of differential loop gain in combat veterans with and without PTSD.
Dr. Woodward and Dr. Benca also highlighted the large body of evidence that psychiatric disorders such as bipolar disorder, schizophrenia, and, in particular, major depressive disorder, are strongly associated with higher rates of OSA.
“In sum, we do not believe that a fair reading of the current literature supports a conclusion that PTSD bears an association with OSA that does not overlap with those manifested by other psychiatric disorders,” they wrote.
“This commentary is not intended to discourage any specific line of inquiry. Rather, we seek to keep the door open as wide as possible to hypotheses and research designs aimed at elucidating the relationships between OSA and psychiatric disorders,” Dr. Woodward and Dr. Benca concluded.
In response, Dr. Shah said the editorialists’ “point about psychiatric conditions other than PTSD also being important in OSA is well taken. In our own cohort, we did not see such an association, but that does not mean that this does not exist.
“Autonomic physiology, which we plan to study next, may underlie not only the PTSD-OSA relationship but also the relationship between other psychiatric factors and OSA,” he added.
The study was funded by grants from the National Institutes of Health (NIH). One study author reported receiving personal fees from Idorsia, and another reported receiving personal fees from Clinilabs, Eisai, Ferring Pharmaceuticals, Huxley, Idorsia, and Merck Sharp & Dohme. Dr. Benca reported receiving grants from the NIH and Eisai and personal fees from Eisai, Idorsia, Haleon, and Sage Therapeutics. Dr. Woodward reported having no relevant conflicts of interest.
A version of this article first appeared on Medscape.com.
Posttraumatic stress disorder (PTSD) may enhance the risk for obstructive sleep apnea (OSA) in older male veterans, the results of a cross-sectional twin study suggested. However, additional high-quality research is needed and may yield important mechanistic insights into both conditions and improve treatment, experts said.
“The strength of the association was a bit surprising,” said study investigator Amit J. Shah, MD, MSCR, Emory University, Atlanta, Georgia. “Many physicians and scientists may otherwise assume that the relationship between PTSD and sleep apnea would be primarily mediated by obesity, but we did not find that obesity explained our findings.”
The study was published online in JAMA Network Open.
A More Rigorous Evaluation
“Prior studies have shown an association between PTSD and sleep apnea, but the size of the association was not as strong,” Dr. Shah said, possibly because many were based on symptomatic patients referred for clinical evaluation of OSA and some relied on self-report of a sleep apnea diagnosis.
The current study involved 181 male twins, aged 61-71 years, including 66 pairs discordant for PTSD symptoms and 15 pairs discordant for PTSD diagnosis, who were recruited from the Vietnam Era Twin Registry and underwent a formal psychiatric and polysomnography evaluation as follow-up of the Emory Twin Study.
PTSD symptom severity was assessed using the self-administered Posttraumatic Stress Disorder Checklist (PCL). OSA was mild in 74% of participants, moderate to severe in 40%, and severe in 18%.
The mean apnea-hypopnea index (AHI) was 17.7 events per hour, and the mean proportion of the night with SaO2 less than 90% was 8.9%.
In fully adjusted models, each 15-point within-pair difference in PCL score was associated with a 4.6 events-per-hour higher AHI, a 6.4 events-per-hour higher oxygen desaturation index, and a 4.8% greater sleep duration with SaO2 less than 90%.
A current PTSD diagnosis is associated with an approximate 10-unit higher adjusted AHI in separate models involving potential cardiovascular mediators (10.5-unit; 95% CI, 5.7-15.3) and sociodemographic and psychiatric confounders (10.7-unit; 95% CI, 4.0-17.4).
The investigators called for more research into the underlying mechanisms but speculated that pharyngeal collapsibility and exaggerated loop gain, among others, may play a role.
“Our findings broaden the concept of OSA as one that may involve stress pathways in addition to the traditional mechanisms involving airway collapse and obesity,” Dr. Shah said. “We should be more suspicious of OSA as an important comorbidity in PTSD, given the high OSA prevalence that we found in PTSD veterans.”
Questions Remain
In an accompanying editorial, Steven H. Woodward, PhD, and Ruth M. Benca, MD, PhD, VA Palo Alto Health Care Systems, Palo Alto, California, noted the study affirmatively answers the decades-old question of whether rates of OSA are elevated in PTSD and “eliminates many potential confounders that might cast doubt on the PTSD-OSA association.”
However, they noted, it’s difficult to ascertain the directionality of this association and point out that, in terms of potential mechanisms, the oft-cited 1994 study linking sleep fragmentation with upper airway collapsibility has never been replicated and that a recent study found no difference in airway collapsibility or evidence of differential loop gain in combat veterans with and without PTSD.
Dr. Woodward and Dr. Benca also highlighted the large body of evidence that psychiatric disorders such as bipolar disorder, schizophrenia, and, in particular, major depressive disorder, are strongly associated with higher rates of OSA.
“In sum, we do not believe that a fair reading of the current literature supports a conclusion that PTSD bears an association with OSA that does not overlap with those manifested by other psychiatric disorders,” they wrote.
“This commentary is not intended to discourage any specific line of inquiry. Rather, we seek to keep the door open as wide as possible to hypotheses and research designs aimed at elucidating the relationships between OSA and psychiatric disorders,” Dr. Woodward and Dr. Benca concluded.
In response, Dr. Shah said the editorialists’ “point about psychiatric conditions other than PTSD also being important in OSA is well taken. In our own cohort, we did not see such an association, but that does not mean that this does not exist.
“Autonomic physiology, which we plan to study next, may underlie not only the PTSD-OSA relationship but also the relationship between other psychiatric factors and OSA,” he added.
The study was funded by grants from the National Institutes of Health (NIH). One study author reported receiving personal fees from Idorsia, and another reported receiving personal fees from Clinilabs, Eisai, Ferring Pharmaceuticals, Huxley, Idorsia, and Merck Sharp & Dohme. Dr. Benca reported receiving grants from the NIH and Eisai and personal fees from Eisai, Idorsia, Haleon, and Sage Therapeutics. Dr. Woodward reported having no relevant conflicts of interest.
A version of this article first appeared on Medscape.com.
FROM JAMA NETWORK OPEN
Commonly Used Meds Tied to Lower Risk for Brain Aneurysm Rupture
(aSAH), a drug-wide association study suggested.
The blood pressure drug lisinopril; the cholesterol drug simvastatin; the diabetes drug metformin; and the drug tamsulosin, prescribed for an enlarged prostate, were all associated with decreased aSAH risk, investigators found.
Conversely, four other drugs were associated with an increased risk for this severely morbid, often deadly, condition.
“The motivation for this study was the fact that we can currently prevent bleeding from intracranial aneurysms only by invasive treatment of those aneurysms with inherent complication risks,” said study investigator Ynte Ruigrok, MD, PhD, associate professor of neurology and neurosurgery, University Medical Center Utrecht, Utrecht, the Netherlands. “Drugs to reduce or eliminate this risk are not yet available. This study is a first step in identifying such drugs.”
The findings were published online in Neurology.
Surprising Results
For the study, the researchers used the Secure Anonymized Information Linkage data bank in Wales to identify 4879 patients with aSAH between January 2000 and December 2019 and 43,911 patients without aSAH matched on age, sex, and year of database entry. Clustering resulted in 2023 unique drugs, of which 205 were commonly prescribed.
After adjusting for other factors such as high blood pressure, alcohol abuse, smoking, and a total number of health conditions, the results yielded two surprises, Dr. Ruigrok observed.
The first was a significant decrease in aSAH risk for current use of lisinopril, compared with nonuse (odds ratio [OR], 0.63; 95% confidence interval [CI], 0.44-0.90), and a nonsignificant decrease with current use of amlodipine (OR, 0.82; 95% CI, 0.65-1.04).
“Hypertension is a major risk factor for occurrence and bleeding from aneurysms. If there is indeed a specific blood pressure–lowering drug that not only has a blood pressure–lowering effect but also has additional protection against aSAH, then perhaps that drug should become the drug of choice in aneurysm patients in the future,” he said.
Notably, recent use of both drugs, defined as between 1 year and 3 months before the index date, was associated with an increased risk for aSAH. This trend was not found for other antihypertensives and was significant for amlodipine but not lisinopril.
The reasons are unclear, but “we trust the findings on lisinopril more,” Dr. Ruigrok said. “The findings on amlodipine may be due to confounding by indication, specifically caused by hypertension. Therefore, it is important to validate our findings in an independent research cohort, and we are in the process of doing so.”
The study’s second surprise was the antidiabetic drug metformin and cholesterol-lowering drug simvastatin were also associated with reduced aSAH risk, Dr. Ruigrok noted.
“We already knew from previous studies that diabetes and high cholesterol are protective factors for aSAH,” he said. “Our results suggest that perhaps not the conditions themselves are protective for aSAH but rather the drugs used to treat these conditions with are.”
The risk for a ruptured brain aneurysm among current users was 42% lower with metformin (OR, 0.58; 95% CI, 0.43-0.78), 22% lower with simvastatin (OR, 0.78; 95% CI, 0.64-0.96), and 45% lower with tamsulosin (OR, 0.55; 95% CI, 0.32-0.93).
An increased risk for aSAH was found only in current users of warfarin (OR, 1.35; 95% CI, 1.02-1.79), venlafaxine (OR, 1.67; 95% CI, 1.01-2.75), prochlorperazine (OR, 2.15; 95% CI, 1.45-3.18), and co-codamol (OR, 1.31; 95% CI, 1.10-1.56).
Other drugs within the classes of vitamin K antagonists, serotonin reuptake inhibitors, conventional antipsychotics, and compound analgesics did not show an association with aSAH.
The study was limited by the use of drug prescriptions, and patients may not take their drugs or use them incorrectly, noted the researchers, led by Jos P. Kanning, MSc, also with University Medical Center Utrecht.
The study was supported by the European Research Council. The authors reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
(aSAH), a drug-wide association study suggested.
The blood pressure drug lisinopril; the cholesterol drug simvastatin; the diabetes drug metformin; and the drug tamsulosin, prescribed for an enlarged prostate, were all associated with decreased aSAH risk, investigators found.
Conversely, four other drugs were associated with an increased risk for this severely morbid, often deadly, condition.
“The motivation for this study was the fact that we can currently prevent bleeding from intracranial aneurysms only by invasive treatment of those aneurysms with inherent complication risks,” said study investigator Ynte Ruigrok, MD, PhD, associate professor of neurology and neurosurgery, University Medical Center Utrecht, Utrecht, the Netherlands. “Drugs to reduce or eliminate this risk are not yet available. This study is a first step in identifying such drugs.”
The findings were published online in Neurology.
Surprising Results
For the study, the researchers used the Secure Anonymized Information Linkage data bank in Wales to identify 4879 patients with aSAH between January 2000 and December 2019 and 43,911 patients without aSAH matched on age, sex, and year of database entry. Clustering resulted in 2023 unique drugs, of which 205 were commonly prescribed.
After adjusting for other factors such as high blood pressure, alcohol abuse, smoking, and a total number of health conditions, the results yielded two surprises, Dr. Ruigrok observed.
The first was a significant decrease in aSAH risk for current use of lisinopril, compared with nonuse (odds ratio [OR], 0.63; 95% confidence interval [CI], 0.44-0.90), and a nonsignificant decrease with current use of amlodipine (OR, 0.82; 95% CI, 0.65-1.04).
“Hypertension is a major risk factor for occurrence and bleeding from aneurysms. If there is indeed a specific blood pressure–lowering drug that not only has a blood pressure–lowering effect but also has additional protection against aSAH, then perhaps that drug should become the drug of choice in aneurysm patients in the future,” he said.
Notably, recent use of both drugs, defined as between 1 year and 3 months before the index date, was associated with an increased risk for aSAH. This trend was not found for other antihypertensives and was significant for amlodipine but not lisinopril.
The reasons are unclear, but “we trust the findings on lisinopril more,” Dr. Ruigrok said. “The findings on amlodipine may be due to confounding by indication, specifically caused by hypertension. Therefore, it is important to validate our findings in an independent research cohort, and we are in the process of doing so.”
The study’s second surprise was the antidiabetic drug metformin and cholesterol-lowering drug simvastatin were also associated with reduced aSAH risk, Dr. Ruigrok noted.
“We already knew from previous studies that diabetes and high cholesterol are protective factors for aSAH,” he said. “Our results suggest that perhaps not the conditions themselves are protective for aSAH but rather the drugs used to treat these conditions with are.”
The risk for a ruptured brain aneurysm among current users was 42% lower with metformin (OR, 0.58; 95% CI, 0.43-0.78), 22% lower with simvastatin (OR, 0.78; 95% CI, 0.64-0.96), and 45% lower with tamsulosin (OR, 0.55; 95% CI, 0.32-0.93).
An increased risk for aSAH was found only in current users of warfarin (OR, 1.35; 95% CI, 1.02-1.79), venlafaxine (OR, 1.67; 95% CI, 1.01-2.75), prochlorperazine (OR, 2.15; 95% CI, 1.45-3.18), and co-codamol (OR, 1.31; 95% CI, 1.10-1.56).
Other drugs within the classes of vitamin K antagonists, serotonin reuptake inhibitors, conventional antipsychotics, and compound analgesics did not show an association with aSAH.
The study was limited by the use of drug prescriptions, and patients may not take their drugs or use them incorrectly, noted the researchers, led by Jos P. Kanning, MSc, also with University Medical Center Utrecht.
The study was supported by the European Research Council. The authors reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
(aSAH), a drug-wide association study suggested.
The blood pressure drug lisinopril; the cholesterol drug simvastatin; the diabetes drug metformin; and the drug tamsulosin, prescribed for an enlarged prostate, were all associated with decreased aSAH risk, investigators found.
Conversely, four other drugs were associated with an increased risk for this severely morbid, often deadly, condition.
“The motivation for this study was the fact that we can currently prevent bleeding from intracranial aneurysms only by invasive treatment of those aneurysms with inherent complication risks,” said study investigator Ynte Ruigrok, MD, PhD, associate professor of neurology and neurosurgery, University Medical Center Utrecht, Utrecht, the Netherlands. “Drugs to reduce or eliminate this risk are not yet available. This study is a first step in identifying such drugs.”
The findings were published online in Neurology.
Surprising Results
For the study, the researchers used the Secure Anonymized Information Linkage data bank in Wales to identify 4879 patients with aSAH between January 2000 and December 2019 and 43,911 patients without aSAH matched on age, sex, and year of database entry. Clustering resulted in 2023 unique drugs, of which 205 were commonly prescribed.
After adjusting for other factors such as high blood pressure, alcohol abuse, smoking, and a total number of health conditions, the results yielded two surprises, Dr. Ruigrok observed.
The first was a significant decrease in aSAH risk for current use of lisinopril, compared with nonuse (odds ratio [OR], 0.63; 95% confidence interval [CI], 0.44-0.90), and a nonsignificant decrease with current use of amlodipine (OR, 0.82; 95% CI, 0.65-1.04).
“Hypertension is a major risk factor for occurrence and bleeding from aneurysms. If there is indeed a specific blood pressure–lowering drug that not only has a blood pressure–lowering effect but also has additional protection against aSAH, then perhaps that drug should become the drug of choice in aneurysm patients in the future,” he said.
Notably, recent use of both drugs, defined as between 1 year and 3 months before the index date, was associated with an increased risk for aSAH. This trend was not found for other antihypertensives and was significant for amlodipine but not lisinopril.
The reasons are unclear, but “we trust the findings on lisinopril more,” Dr. Ruigrok said. “The findings on amlodipine may be due to confounding by indication, specifically caused by hypertension. Therefore, it is important to validate our findings in an independent research cohort, and we are in the process of doing so.”
The study’s second surprise was the antidiabetic drug metformin and cholesterol-lowering drug simvastatin were also associated with reduced aSAH risk, Dr. Ruigrok noted.
“We already knew from previous studies that diabetes and high cholesterol are protective factors for aSAH,” he said. “Our results suggest that perhaps not the conditions themselves are protective for aSAH but rather the drugs used to treat these conditions with are.”
The risk for a ruptured brain aneurysm among current users was 42% lower with metformin (OR, 0.58; 95% CI, 0.43-0.78), 22% lower with simvastatin (OR, 0.78; 95% CI, 0.64-0.96), and 45% lower with tamsulosin (OR, 0.55; 95% CI, 0.32-0.93).
An increased risk for aSAH was found only in current users of warfarin (OR, 1.35; 95% CI, 1.02-1.79), venlafaxine (OR, 1.67; 95% CI, 1.01-2.75), prochlorperazine (OR, 2.15; 95% CI, 1.45-3.18), and co-codamol (OR, 1.31; 95% CI, 1.10-1.56).
Other drugs within the classes of vitamin K antagonists, serotonin reuptake inhibitors, conventional antipsychotics, and compound analgesics did not show an association with aSAH.
The study was limited by the use of drug prescriptions, and patients may not take their drugs or use them incorrectly, noted the researchers, led by Jos P. Kanning, MSc, also with University Medical Center Utrecht.
The study was supported by the European Research Council. The authors reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
FROM NEUROLOGY
Suicide in Surgeons: The Heavy Toll of a High-Stakes Career
For those outside the medical profession, it took a global pandemic to finally understand how pervasive distress and suicide are among medical professionals, particularly surgeons.
For James Harrop, MD, it was made real years earlier by a colleague he’d trained alongside and worked with for decades — “one of the best surgeons I’ve ever seen” who, one day, just wasn’t there.
Lost in his own work, it wasn’t until Dr. Harrop, a professor of neurological and orthopedic surgery at Thomas Jefferson University, Philadelphia, read an article in The New England Journal of Medicine and realized his friend Michael Weinstein, MD, MPH, had been profoundly depressed for years and was hospitalized for his own safety.
Dr. Weinstein recovered and later gave grand rounds at Thomas Jefferson University, where he is an associate professor of surgery in the Acute Care Surgery Division. But the story stuck with Dr. Harrop.
“I said to Mike afterward, I’ve known you for 20 years and, retrospectively, going back, I never saw a single sign that you were depressed, sad, or had any issues, and he said to me ‘that’s because I did everything I could to make sure no one knew I had a problem,’ ” Dr. Harrop said during a talk on physician suicide on May 4 at the American Association of Neurological Surgeons (AANS) 2024 Annual Meeting.
“And that scared me because we need to help these people, we need to identify who they are.”
Surgeons at Greater Risk
Among 9175 physicians surveyed in the 2023 Medscape Physician Suicide Report, 9% had considered suicide, and 1% had attempted it. The average for US adults is 4.9% and 0.5%, respectively.
Surgeons are at particularly high risk. A 2011 survey of 7905 US surgeons found that 1 in 16 (6.3%) had considered suicide in the previous year. A post-pandemic survey of more than 600 surgeons and surgical trainees reported that one in seven had suicidal ideation.
It’s often estimated that between 300 and 400 physicians die by suicide each year in the United States, but exact numbers are not known. Recent updated estimates from the National Violent Death Reporting System put the number at 119 physician suicides annually.
Notably, that’s no better than data reported more than 50 years ago in the landmark policy paper The Sick Physician: Impairment by Psychiatric Disorders, Including Alcoholism and Drug Dependence. It sounded the alarm on poor mental health in physicians and reported that 100 doctors died by suicide annually — the equivalent of the average medical school graduating class at the time.
“If I take my med school class and double it, that’s how many physicians die each year,” Dr. Harrop said. “And here’s the bad news, it starts in medical school.”
Research shows higher rates of depression and suicidal ideation in medical students and residents than in other graduates, with rates varying by stage of training, he noted.
In a multischool study, 12% of medical students and residents had probable major depression, 9.2% mild/moderate depression, and suicidal ideation jumped from 6.6% in the first year of medical school to 9.4% in year 4.
A recent AANS survey of 346 neurosurgery residents revealed 67% had burnout, and 41% seriously considered quitting. Burnout rose to a high of 76% in the second year and decreased to 49% and 54% in years 3 and 4, respectively.
Inadequate operating room exposure, hostile faculty, and stressors outside work were tied to burnout, whereas mentorship was linked to a threefold lower likelihood of burnout.
Notably, a 2019 study conservatively estimated that the annual cost of burnout-related physician turnover and reduced clinical hours was $4.6 billion nationally and $7600 per employed physician for an organization.
“We need to be kinder to each other, to look out for each other, and to talk to each other,” Dr. Harrop told conference attendees.
‘Death by a 1000 Cuts’
A host of factors are associated with physician suicide including long work hours, delayed gratification, difficulty balancing work and home life, changing healthcare systems, lawsuits, and the unique ability to prescribe medications, said Dr. Harrop.
“In my life, I think of it as death by 1000 cuts. Every day I come in, you’ve got another person attacking you,” he said, referencing Death by 1000 Cuts: Medscape National Physician Burnout & Suicide Report 2021.
Dr. Harrop told this news organization that talking with numerous experts in this field has made him appreciate that anyone is at a risk for suicide.
“The problem is an overload of external resources crushing your existence to the point that you become paralyzed and make the irrational thought that the best solution is to end your life,” he said.
Ann Stroink, MD, immediate past president of the AANS, said in an interview that one potential trigger for burnout is the current shortage of neurosurgeons in the United States, which has led to increased workloads and potential sleep deprivation among existing neurosurgeons.
“To address this critical issue, we’ve been advocating through legislative channels for additional Medicare[-funded] slots” to train more neurosurgeons, she said. “It’s imperative that we take proactive steps to ensure that our healthcare system can sustainably meet the needs of patients, while also supporting the well-being of our neurosurgical professionals.”
The AANS is also advocating for decreased regulatory burdens associated with Medicare and insurance coverage, such as prior authorization, to help alleviate the administrative burdens that often contribute to burnout among its members, Dr. Stroink said.
A Model for Suicide Prevention
Dr. Harrop emphasized that suicide is preventable and that there is “some good news.” Turning to another high-risk profession, he noted that the US Air Force was able to reduce its suicide rate by 42.7% between 1994 and 1998 by doing three basic things.
The agency established a central surveillance database, restructured prevention services, and, more importantly, began conducting annual suicide prevention and awareness training, using gatekeepers to channel at-risk personnel to appropriate agencies and performing mental health questionnaires at enrollment and annually.
Similarly, education, screening, and access to mental health treatment are core recommendations for a national response to depression and suicide in physician trainees, said Dr. Harrop, who noted that his own hospital has started using the Patient Health Questionnaire 9-item for its staff.
Asked by this news organization how much progress has been made since The Sick Physician report, Dr. Harrop said, “we are probably doing worse” in terms of the number of physician suicides, but “on a positive note, we are better with resources and acknowledgment that a problem exists.”
He noted that the AANS, which has published a physician burnout series on its Neurosurgery Blog, has shown great interest in this topic and is working to spread the word to help neurosurgeons. “My simple talk has led to me being approached by numerous people and healthcare organizations on how to further focus resources and prevention of this problem.”
Asked the one thing he would tell his friend, Michael Weinstein, a fellow surgeon, or trainee who’s struggling, Dr. Harrop said, “I am here for you, and we will get over these temporary problems, which are not significant in the big picture of what you mean to the world.”
Dr. Harrop reported serving as an adviser for Ethicon and Spiderwort.
A version of this article appeared on Medscape.com.
For those outside the medical profession, it took a global pandemic to finally understand how pervasive distress and suicide are among medical professionals, particularly surgeons.
For James Harrop, MD, it was made real years earlier by a colleague he’d trained alongside and worked with for decades — “one of the best surgeons I’ve ever seen” who, one day, just wasn’t there.
Lost in his own work, it wasn’t until Dr. Harrop, a professor of neurological and orthopedic surgery at Thomas Jefferson University, Philadelphia, read an article in The New England Journal of Medicine and realized his friend Michael Weinstein, MD, MPH, had been profoundly depressed for years and was hospitalized for his own safety.
Dr. Weinstein recovered and later gave grand rounds at Thomas Jefferson University, where he is an associate professor of surgery in the Acute Care Surgery Division. But the story stuck with Dr. Harrop.
“I said to Mike afterward, I’ve known you for 20 years and, retrospectively, going back, I never saw a single sign that you were depressed, sad, or had any issues, and he said to me ‘that’s because I did everything I could to make sure no one knew I had a problem,’ ” Dr. Harrop said during a talk on physician suicide on May 4 at the American Association of Neurological Surgeons (AANS) 2024 Annual Meeting.
“And that scared me because we need to help these people, we need to identify who they are.”
Surgeons at Greater Risk
Among 9175 physicians surveyed in the 2023 Medscape Physician Suicide Report, 9% had considered suicide, and 1% had attempted it. The average for US adults is 4.9% and 0.5%, respectively.
Surgeons are at particularly high risk. A 2011 survey of 7905 US surgeons found that 1 in 16 (6.3%) had considered suicide in the previous year. A post-pandemic survey of more than 600 surgeons and surgical trainees reported that one in seven had suicidal ideation.
It’s often estimated that between 300 and 400 physicians die by suicide each year in the United States, but exact numbers are not known. Recent updated estimates from the National Violent Death Reporting System put the number at 119 physician suicides annually.
Notably, that’s no better than data reported more than 50 years ago in the landmark policy paper The Sick Physician: Impairment by Psychiatric Disorders, Including Alcoholism and Drug Dependence. It sounded the alarm on poor mental health in physicians and reported that 100 doctors died by suicide annually — the equivalent of the average medical school graduating class at the time.
“If I take my med school class and double it, that’s how many physicians die each year,” Dr. Harrop said. “And here’s the bad news, it starts in medical school.”
Research shows higher rates of depression and suicidal ideation in medical students and residents than in other graduates, with rates varying by stage of training, he noted.
In a multischool study, 12% of medical students and residents had probable major depression, 9.2% mild/moderate depression, and suicidal ideation jumped from 6.6% in the first year of medical school to 9.4% in year 4.
A recent AANS survey of 346 neurosurgery residents revealed 67% had burnout, and 41% seriously considered quitting. Burnout rose to a high of 76% in the second year and decreased to 49% and 54% in years 3 and 4, respectively.
Inadequate operating room exposure, hostile faculty, and stressors outside work were tied to burnout, whereas mentorship was linked to a threefold lower likelihood of burnout.
Notably, a 2019 study conservatively estimated that the annual cost of burnout-related physician turnover and reduced clinical hours was $4.6 billion nationally and $7600 per employed physician for an organization.
“We need to be kinder to each other, to look out for each other, and to talk to each other,” Dr. Harrop told conference attendees.
‘Death by a 1000 Cuts’
A host of factors are associated with physician suicide including long work hours, delayed gratification, difficulty balancing work and home life, changing healthcare systems, lawsuits, and the unique ability to prescribe medications, said Dr. Harrop.
“In my life, I think of it as death by 1000 cuts. Every day I come in, you’ve got another person attacking you,” he said, referencing Death by 1000 Cuts: Medscape National Physician Burnout & Suicide Report 2021.
Dr. Harrop told this news organization that talking with numerous experts in this field has made him appreciate that anyone is at a risk for suicide.
“The problem is an overload of external resources crushing your existence to the point that you become paralyzed and make the irrational thought that the best solution is to end your life,” he said.
Ann Stroink, MD, immediate past president of the AANS, said in an interview that one potential trigger for burnout is the current shortage of neurosurgeons in the United States, which has led to increased workloads and potential sleep deprivation among existing neurosurgeons.
“To address this critical issue, we’ve been advocating through legislative channels for additional Medicare[-funded] slots” to train more neurosurgeons, she said. “It’s imperative that we take proactive steps to ensure that our healthcare system can sustainably meet the needs of patients, while also supporting the well-being of our neurosurgical professionals.”
The AANS is also advocating for decreased regulatory burdens associated with Medicare and insurance coverage, such as prior authorization, to help alleviate the administrative burdens that often contribute to burnout among its members, Dr. Stroink said.
A Model for Suicide Prevention
Dr. Harrop emphasized that suicide is preventable and that there is “some good news.” Turning to another high-risk profession, he noted that the US Air Force was able to reduce its suicide rate by 42.7% between 1994 and 1998 by doing three basic things.
The agency established a central surveillance database, restructured prevention services, and, more importantly, began conducting annual suicide prevention and awareness training, using gatekeepers to channel at-risk personnel to appropriate agencies and performing mental health questionnaires at enrollment and annually.
Similarly, education, screening, and access to mental health treatment are core recommendations for a national response to depression and suicide in physician trainees, said Dr. Harrop, who noted that his own hospital has started using the Patient Health Questionnaire 9-item for its staff.
Asked by this news organization how much progress has been made since The Sick Physician report, Dr. Harrop said, “we are probably doing worse” in terms of the number of physician suicides, but “on a positive note, we are better with resources and acknowledgment that a problem exists.”
He noted that the AANS, which has published a physician burnout series on its Neurosurgery Blog, has shown great interest in this topic and is working to spread the word to help neurosurgeons. “My simple talk has led to me being approached by numerous people and healthcare organizations on how to further focus resources and prevention of this problem.”
Asked the one thing he would tell his friend, Michael Weinstein, a fellow surgeon, or trainee who’s struggling, Dr. Harrop said, “I am here for you, and we will get over these temporary problems, which are not significant in the big picture of what you mean to the world.”
Dr. Harrop reported serving as an adviser for Ethicon and Spiderwort.
A version of this article appeared on Medscape.com.
For those outside the medical profession, it took a global pandemic to finally understand how pervasive distress and suicide are among medical professionals, particularly surgeons.
For James Harrop, MD, it was made real years earlier by a colleague he’d trained alongside and worked with for decades — “one of the best surgeons I’ve ever seen” who, one day, just wasn’t there.
Lost in his own work, it wasn’t until Dr. Harrop, a professor of neurological and orthopedic surgery at Thomas Jefferson University, Philadelphia, read an article in The New England Journal of Medicine and realized his friend Michael Weinstein, MD, MPH, had been profoundly depressed for years and was hospitalized for his own safety.
Dr. Weinstein recovered and later gave grand rounds at Thomas Jefferson University, where he is an associate professor of surgery in the Acute Care Surgery Division. But the story stuck with Dr. Harrop.
“I said to Mike afterward, I’ve known you for 20 years and, retrospectively, going back, I never saw a single sign that you were depressed, sad, or had any issues, and he said to me ‘that’s because I did everything I could to make sure no one knew I had a problem,’ ” Dr. Harrop said during a talk on physician suicide on May 4 at the American Association of Neurological Surgeons (AANS) 2024 Annual Meeting.
“And that scared me because we need to help these people, we need to identify who they are.”
Surgeons at Greater Risk
Among 9175 physicians surveyed in the 2023 Medscape Physician Suicide Report, 9% had considered suicide, and 1% had attempted it. The average for US adults is 4.9% and 0.5%, respectively.
Surgeons are at particularly high risk. A 2011 survey of 7905 US surgeons found that 1 in 16 (6.3%) had considered suicide in the previous year. A post-pandemic survey of more than 600 surgeons and surgical trainees reported that one in seven had suicidal ideation.
It’s often estimated that between 300 and 400 physicians die by suicide each year in the United States, but exact numbers are not known. Recent updated estimates from the National Violent Death Reporting System put the number at 119 physician suicides annually.
Notably, that’s no better than data reported more than 50 years ago in the landmark policy paper The Sick Physician: Impairment by Psychiatric Disorders, Including Alcoholism and Drug Dependence. It sounded the alarm on poor mental health in physicians and reported that 100 doctors died by suicide annually — the equivalent of the average medical school graduating class at the time.
“If I take my med school class and double it, that’s how many physicians die each year,” Dr. Harrop said. “And here’s the bad news, it starts in medical school.”
Research shows higher rates of depression and suicidal ideation in medical students and residents than in other graduates, with rates varying by stage of training, he noted.
In a multischool study, 12% of medical students and residents had probable major depression, 9.2% mild/moderate depression, and suicidal ideation jumped from 6.6% in the first year of medical school to 9.4% in year 4.
A recent AANS survey of 346 neurosurgery residents revealed 67% had burnout, and 41% seriously considered quitting. Burnout rose to a high of 76% in the second year and decreased to 49% and 54% in years 3 and 4, respectively.
Inadequate operating room exposure, hostile faculty, and stressors outside work were tied to burnout, whereas mentorship was linked to a threefold lower likelihood of burnout.
Notably, a 2019 study conservatively estimated that the annual cost of burnout-related physician turnover and reduced clinical hours was $4.6 billion nationally and $7600 per employed physician for an organization.
“We need to be kinder to each other, to look out for each other, and to talk to each other,” Dr. Harrop told conference attendees.
‘Death by a 1000 Cuts’
A host of factors are associated with physician suicide including long work hours, delayed gratification, difficulty balancing work and home life, changing healthcare systems, lawsuits, and the unique ability to prescribe medications, said Dr. Harrop.
“In my life, I think of it as death by 1000 cuts. Every day I come in, you’ve got another person attacking you,” he said, referencing Death by 1000 Cuts: Medscape National Physician Burnout & Suicide Report 2021.
Dr. Harrop told this news organization that talking with numerous experts in this field has made him appreciate that anyone is at a risk for suicide.
“The problem is an overload of external resources crushing your existence to the point that you become paralyzed and make the irrational thought that the best solution is to end your life,” he said.
Ann Stroink, MD, immediate past president of the AANS, said in an interview that one potential trigger for burnout is the current shortage of neurosurgeons in the United States, which has led to increased workloads and potential sleep deprivation among existing neurosurgeons.
“To address this critical issue, we’ve been advocating through legislative channels for additional Medicare[-funded] slots” to train more neurosurgeons, she said. “It’s imperative that we take proactive steps to ensure that our healthcare system can sustainably meet the needs of patients, while also supporting the well-being of our neurosurgical professionals.”
The AANS is also advocating for decreased regulatory burdens associated with Medicare and insurance coverage, such as prior authorization, to help alleviate the administrative burdens that often contribute to burnout among its members, Dr. Stroink said.
A Model for Suicide Prevention
Dr. Harrop emphasized that suicide is preventable and that there is “some good news.” Turning to another high-risk profession, he noted that the US Air Force was able to reduce its suicide rate by 42.7% between 1994 and 1998 by doing three basic things.
The agency established a central surveillance database, restructured prevention services, and, more importantly, began conducting annual suicide prevention and awareness training, using gatekeepers to channel at-risk personnel to appropriate agencies and performing mental health questionnaires at enrollment and annually.
Similarly, education, screening, and access to mental health treatment are core recommendations for a national response to depression and suicide in physician trainees, said Dr. Harrop, who noted that his own hospital has started using the Patient Health Questionnaire 9-item for its staff.
Asked by this news organization how much progress has been made since The Sick Physician report, Dr. Harrop said, “we are probably doing worse” in terms of the number of physician suicides, but “on a positive note, we are better with resources and acknowledgment that a problem exists.”
He noted that the AANS, which has published a physician burnout series on its Neurosurgery Blog, has shown great interest in this topic and is working to spread the word to help neurosurgeons. “My simple talk has led to me being approached by numerous people and healthcare organizations on how to further focus resources and prevention of this problem.”
Asked the one thing he would tell his friend, Michael Weinstein, a fellow surgeon, or trainee who’s struggling, Dr. Harrop said, “I am here for you, and we will get over these temporary problems, which are not significant in the big picture of what you mean to the world.”
Dr. Harrop reported serving as an adviser for Ethicon and Spiderwort.
A version of this article appeared on Medscape.com.
Is Meningitis a Risk Factor for Trigeminal Neuralgia? New Data
In multivariate analysis, the odds of meningitis were threefold higher in patients admitted with trigeminal neuralgia than in matched controls without trigeminal neuralgia.
This is the first nationwide population-based study of the rare, chronic pain disorder to identify the prevalence of trigeminal neuralgia admissions in the United States and risk factors contributing to trigeminal neuralgia development.
“Our results affirm known associations between trigeminal neuralgia and comorbidities like multiple sclerosis, and they also identify meningitis as a novel risk factor for trigeminal neuralgia,” said investigator Megan Tang, BS, a medical student at the Icahn School of Medicine at Mount Sinai, New York City.
The findings were presented at the American Association of Neurological Surgeons (AANS) 2024 annual meeting.
Strong Clinical Risk Factors
Trigeminal neuralgia is a rare pain disorder involving neurovascular compression of the trigeminal nerve. Its etiology and risk factors are poorly understood. Current literature is based on limited datasets and reports inconsistent risk factors across studies.
To better understand the disorder, researchers used International Classification of Diseases (ICD)-9 codes to identify trigeminal neuralgia admissions in the National Inpatient Sample from 2016 to 2019, and then propensity matched them 1:1 to non-trigeminal neuralgia admissions based on demographics, socioeconomic status, and Charlson comorbidity index scores.
Univariate analysis identified 136,345 trigeminal neuralgia admissions or an overall prevalence of 0.096%.
Trigeminal neuralgia admissions had lower morbidity than non-trigeminal neuralgia admissions and a higher prevalence of non-White patients, private insurance, and prolonged length of stay, Ms. Tang said.
Patients admitted for trigeminal neuralgia also had a higher prevalence of several chronic conditions, including hypertension, hyperlipidemia, and osteoarthritis; inflammatory conditions like lupus, meningitis, rheumatoid arthritis, and inflammatory bowel disease; and neurologic conditions including multiple sclerosis, epilepsy, stroke, and neurovascular compression disorders.
In multivariate analysis, investigators identified meningitis as a previously unknown risk factor for trigeminal neuralgia (odds ratio [OR], 3.1; P < .001).
Other strong risk factors were neurovascular compression disorders (OR, 39.82; P < .001) and multiple sclerosis (OR, 12.41; P < .001). Non-White race (Black; OR, 1.09; Hispanic; OR, 1.23; Other; OR, 1.24) and use of Medicaid (OR, 1.07) and other insurance (OR, 1.17) were demographic risk factors for trigeminal neuralgia.
“This finding points us toward future work exploring the potential mechanisms of predictors, most notably inflammatory conditions in trigeminal neuralgia development,” Ms. Tang concluded.
She declined to comment further on the findings, noting the investigators are still finalizing the results and interpretation.
Ask About Meningitis, Fever
Commenting on the findings, Michael D. Staudt, MD, MSc, University Hospitals Cleveland Medical Center, said that many patients who present with classical trigeminal neuralgia will have a blood vessel on MRI that is pressing on the trigeminal nerve.
“Obviously, the nerve is bathed in cerebrospinal fluid. So, if there’s an inflammatory marker, inflammation, or infection that could be injuring the nerve in a way that we don’t yet understand, that could be something that could cause trigeminal neuralgia without having to see a blood vessel,” said Dr. Staudt, who was not involved in the study. “It makes sense, theoretically. Something that’s inflammatory, something that’s irritating, that’s novel.”
Currently, predictive markers include clinical history, response to classical medications such as carbamazepine, and MRI findings, Dr. Staudt noted.
“Someone shows up with symptoms and MRI, and it’s basically do they have a blood vessel or not,” he said. “Treatments are generally within the same categories, but we don’t think it’s the same sort of success rate as seeing a blood vessel.”
Further research is needed, but, in the meantime, Dr. Staudt said, “We can ask patients who show up with facial pain if they’ve ever had meningitis or some sort of fever that preceded their onset of pain.”
The study had no specific funding. Ms. Tang and coauthor Jack Y. Zhang, MS, reported no relevant financial disclosures. Dr. Staudt reported serving as a consultant for Abbott and as a scientific adviser and consultant for Boston Scientific.
A version of this article appeared on Medscape.com.
In multivariate analysis, the odds of meningitis were threefold higher in patients admitted with trigeminal neuralgia than in matched controls without trigeminal neuralgia.
This is the first nationwide population-based study of the rare, chronic pain disorder to identify the prevalence of trigeminal neuralgia admissions in the United States and risk factors contributing to trigeminal neuralgia development.
“Our results affirm known associations between trigeminal neuralgia and comorbidities like multiple sclerosis, and they also identify meningitis as a novel risk factor for trigeminal neuralgia,” said investigator Megan Tang, BS, a medical student at the Icahn School of Medicine at Mount Sinai, New York City.
The findings were presented at the American Association of Neurological Surgeons (AANS) 2024 annual meeting.
Strong Clinical Risk Factors
Trigeminal neuralgia is a rare pain disorder involving neurovascular compression of the trigeminal nerve. Its etiology and risk factors are poorly understood. Current literature is based on limited datasets and reports inconsistent risk factors across studies.
To better understand the disorder, researchers used International Classification of Diseases (ICD)-9 codes to identify trigeminal neuralgia admissions in the National Inpatient Sample from 2016 to 2019, and then propensity matched them 1:1 to non-trigeminal neuralgia admissions based on demographics, socioeconomic status, and Charlson comorbidity index scores.
Univariate analysis identified 136,345 trigeminal neuralgia admissions or an overall prevalence of 0.096%.
Trigeminal neuralgia admissions had lower morbidity than non-trigeminal neuralgia admissions and a higher prevalence of non-White patients, private insurance, and prolonged length of stay, Ms. Tang said.
Patients admitted for trigeminal neuralgia also had a higher prevalence of several chronic conditions, including hypertension, hyperlipidemia, and osteoarthritis; inflammatory conditions like lupus, meningitis, rheumatoid arthritis, and inflammatory bowel disease; and neurologic conditions including multiple sclerosis, epilepsy, stroke, and neurovascular compression disorders.
In multivariate analysis, investigators identified meningitis as a previously unknown risk factor for trigeminal neuralgia (odds ratio [OR], 3.1; P < .001).
Other strong risk factors were neurovascular compression disorders (OR, 39.82; P < .001) and multiple sclerosis (OR, 12.41; P < .001). Non-White race (Black; OR, 1.09; Hispanic; OR, 1.23; Other; OR, 1.24) and use of Medicaid (OR, 1.07) and other insurance (OR, 1.17) were demographic risk factors for trigeminal neuralgia.
“This finding points us toward future work exploring the potential mechanisms of predictors, most notably inflammatory conditions in trigeminal neuralgia development,” Ms. Tang concluded.
She declined to comment further on the findings, noting the investigators are still finalizing the results and interpretation.
Ask About Meningitis, Fever
Commenting on the findings, Michael D. Staudt, MD, MSc, University Hospitals Cleveland Medical Center, said that many patients who present with classical trigeminal neuralgia will have a blood vessel on MRI that is pressing on the trigeminal nerve.
“Obviously, the nerve is bathed in cerebrospinal fluid. So, if there’s an inflammatory marker, inflammation, or infection that could be injuring the nerve in a way that we don’t yet understand, that could be something that could cause trigeminal neuralgia without having to see a blood vessel,” said Dr. Staudt, who was not involved in the study. “It makes sense, theoretically. Something that’s inflammatory, something that’s irritating, that’s novel.”
Currently, predictive markers include clinical history, response to classical medications such as carbamazepine, and MRI findings, Dr. Staudt noted.
“Someone shows up with symptoms and MRI, and it’s basically do they have a blood vessel or not,” he said. “Treatments are generally within the same categories, but we don’t think it’s the same sort of success rate as seeing a blood vessel.”
Further research is needed, but, in the meantime, Dr. Staudt said, “We can ask patients who show up with facial pain if they’ve ever had meningitis or some sort of fever that preceded their onset of pain.”
The study had no specific funding. Ms. Tang and coauthor Jack Y. Zhang, MS, reported no relevant financial disclosures. Dr. Staudt reported serving as a consultant for Abbott and as a scientific adviser and consultant for Boston Scientific.
A version of this article appeared on Medscape.com.
In multivariate analysis, the odds of meningitis were threefold higher in patients admitted with trigeminal neuralgia than in matched controls without trigeminal neuralgia.
This is the first nationwide population-based study of the rare, chronic pain disorder to identify the prevalence of trigeminal neuralgia admissions in the United States and risk factors contributing to trigeminal neuralgia development.
“Our results affirm known associations between trigeminal neuralgia and comorbidities like multiple sclerosis, and they also identify meningitis as a novel risk factor for trigeminal neuralgia,” said investigator Megan Tang, BS, a medical student at the Icahn School of Medicine at Mount Sinai, New York City.
The findings were presented at the American Association of Neurological Surgeons (AANS) 2024 annual meeting.
Strong Clinical Risk Factors
Trigeminal neuralgia is a rare pain disorder involving neurovascular compression of the trigeminal nerve. Its etiology and risk factors are poorly understood. Current literature is based on limited datasets and reports inconsistent risk factors across studies.
To better understand the disorder, researchers used International Classification of Diseases (ICD)-9 codes to identify trigeminal neuralgia admissions in the National Inpatient Sample from 2016 to 2019, and then propensity matched them 1:1 to non-trigeminal neuralgia admissions based on demographics, socioeconomic status, and Charlson comorbidity index scores.
Univariate analysis identified 136,345 trigeminal neuralgia admissions or an overall prevalence of 0.096%.
Trigeminal neuralgia admissions had lower morbidity than non-trigeminal neuralgia admissions and a higher prevalence of non-White patients, private insurance, and prolonged length of stay, Ms. Tang said.
Patients admitted for trigeminal neuralgia also had a higher prevalence of several chronic conditions, including hypertension, hyperlipidemia, and osteoarthritis; inflammatory conditions like lupus, meningitis, rheumatoid arthritis, and inflammatory bowel disease; and neurologic conditions including multiple sclerosis, epilepsy, stroke, and neurovascular compression disorders.
In multivariate analysis, investigators identified meningitis as a previously unknown risk factor for trigeminal neuralgia (odds ratio [OR], 3.1; P < .001).
Other strong risk factors were neurovascular compression disorders (OR, 39.82; P < .001) and multiple sclerosis (OR, 12.41; P < .001). Non-White race (Black; OR, 1.09; Hispanic; OR, 1.23; Other; OR, 1.24) and use of Medicaid (OR, 1.07) and other insurance (OR, 1.17) were demographic risk factors for trigeminal neuralgia.
“This finding points us toward future work exploring the potential mechanisms of predictors, most notably inflammatory conditions in trigeminal neuralgia development,” Ms. Tang concluded.
She declined to comment further on the findings, noting the investigators are still finalizing the results and interpretation.
Ask About Meningitis, Fever
Commenting on the findings, Michael D. Staudt, MD, MSc, University Hospitals Cleveland Medical Center, said that many patients who present with classical trigeminal neuralgia will have a blood vessel on MRI that is pressing on the trigeminal nerve.
“Obviously, the nerve is bathed in cerebrospinal fluid. So, if there’s an inflammatory marker, inflammation, or infection that could be injuring the nerve in a way that we don’t yet understand, that could be something that could cause trigeminal neuralgia without having to see a blood vessel,” said Dr. Staudt, who was not involved in the study. “It makes sense, theoretically. Something that’s inflammatory, something that’s irritating, that’s novel.”
Currently, predictive markers include clinical history, response to classical medications such as carbamazepine, and MRI findings, Dr. Staudt noted.
“Someone shows up with symptoms and MRI, and it’s basically do they have a blood vessel or not,” he said. “Treatments are generally within the same categories, but we don’t think it’s the same sort of success rate as seeing a blood vessel.”
Further research is needed, but, in the meantime, Dr. Staudt said, “We can ask patients who show up with facial pain if they’ve ever had meningitis or some sort of fever that preceded their onset of pain.”
The study had no specific funding. Ms. Tang and coauthor Jack Y. Zhang, MS, reported no relevant financial disclosures. Dr. Staudt reported serving as a consultant for Abbott and as a scientific adviser and consultant for Boston Scientific.
A version of this article appeared on Medscape.com.
FROM AANS 2024
Diabetes/Weight Loss Med Linked to Repeat Spinal Surgery
CHICAGO — The diabetes/weight loss drug semaglutide is associated with a significantly greater risk for repeat operations in patients with diabetes who require lumbar surgery, a new study suggests.
The risk for additional surgeries was even higher among patients taking the popular weight loss and diabetes drug for longer periods of time.
Investigators say the study provides the first evidence on the impact of semaglutide on spine surgery.
“The expectation was [that] we would see patients doing better after surgery, less wound complications, and other things, and in our diabetic patients we did not see that and saw increased odds of needing additional surgeries,” investigator Syed I. Khalid, MD, neurosurgery resident at University of Illinois Chicago, told this news organization.
The findings were presented on May 3 at the American Association of Neurological Surgeons (AANS) 2024 Annual Meeting.
Additional Surgery at Year 1
The new study used the all-payer Mariner database to identify patients aged 18-74 years with type 2 diabetes who underwent elective one- to three-level transforaminal lumbar interbody fusions (TLIFs) between January 2018 and October 2022.
Patients were matched in a 3:1 ratio for age, sex, hypertension, obesity, smoking history, chronic kidney disease, osteoporosis, insulin use, and spinal fusion level, resulting in 447 patients with semaglutide use and 1334 with no semaglutide use. More than half (56%) were female, 62% used insulin, and 81% underwent single-level TLIF.
Total medical complications were higher in the semaglutide group, at 13.4%, compared with 7.7% in the no-semaglutide group (odds ratio [OR], 1.85). This was driven by higher rates of urinary tract infection (6.7% vs 2.5%) and acute kidney injury (6.3% vs 3.9%), two complications observed with semaglutide in other studies, Dr. Khalid said.
Total surgical complications, however, were lower in patients taking semaglutide, at 3.8% vs 5.2% in those who did not (OR, 0.73).
Patients taking semaglutide vs those who were not using semaglutide had fewer wound healing complications (5 vs 31), hematoma (1 vs 9), surgical-site infections (12 vs 44), and cerebrospinal fluid leaks (2 vs 3).
Still, people taking semaglutide were nearly 12 times more likely to have an additional lumbar surgery at 1 year than did those who did not use the drug (27.3% vs 3.1%; OR, 11.79; 95% CI, 8.17-17.33).
Kaplan-Meier plots revealed a striking divergence of these populations when semaglutide exposure for more than or less than 9 months was examined (log-rank P < .0001).
Currently under review for publication, this study provides the first evidence on the impact of semaglutide on spine surgery, Dr. Khalid said. A second follow-up paper, also under review, looked only at patients with patients morbidly obesity without diabetes who had taken semaglutide for weight loss.
“In nondiabetic, morbidly obese patients undergoing spine surgery, we see a similar trend,” Dr. Khalid said.
Sarcopenia the Cause?
The additional surgeries were primarily extensions of constructs, with additional surgery and fusion at more levels, Dr. Khalid noted.
“The idea is that it could be the fact there is sarcopenia or muscle loss that’s taking place in conjunction with fat loss that’s causing that to happen,” Dr. Khalid said.
The mechanism remains speculative, but evidence from other areas examining frailty states has shown that those patients have weaker bones, sarcopenia, and worse outcomes with spine surgery, he noted.
The investigators plan to use artificial intelligence to evaluate changes in body composition after semaglutide use in patients who underwent imaging prior to spine surgery or even before back pain occurred. Because these medications are uptitrated over time, follow-up studies will also look at whether this change takes place with a certain dose, Dr. Khalid added.
On the basis of the current analysis of generic semaglutide alone, it’s not possible to say whether the use of other glucagon-like peptide 1 (GLP-1) receptor agonists will result in similar findings, but “the odds of a class effect are high,” Dr. Khalid said.
Commenting on the findings, Walavan Sivakumar, MD, director of neurosurgery at Pacific Neuroscience Institute, Los Angeles, noted that the timing of surgery is already an issue for patients taking semaglutide and other GLP-1 receptor agonists following recent guidance from the American Society of Anesthesiologists that suggests stopping GLP-1 receptor agonists prior to elective surgery to reduce the risk for complications associated with anesthesia.
“It’s an incredibly topical point and seems to be something showing up on a daily basis for clinicians all throughout neurosurgery,” Dr. Sivakumar said. “It’s thought-provoking and a great first start.”
Dr. Sivakumar also observed that frailty is a hot topic in all of neurosurgery. “That’s a major, major point that’s showing an impact on all surgical outcomes and it’s being heavily studied in the neurosurgical subsets right now. So that’s definitely a possible correlating factor.”
Dr. Khalid reported no financial relationships. Dr. Sivakumar reported serving as a consultant for Stryker.
A version of this article appeared on Medscape.com.
CHICAGO — The diabetes/weight loss drug semaglutide is associated with a significantly greater risk for repeat operations in patients with diabetes who require lumbar surgery, a new study suggests.
The risk for additional surgeries was even higher among patients taking the popular weight loss and diabetes drug for longer periods of time.
Investigators say the study provides the first evidence on the impact of semaglutide on spine surgery.
“The expectation was [that] we would see patients doing better after surgery, less wound complications, and other things, and in our diabetic patients we did not see that and saw increased odds of needing additional surgeries,” investigator Syed I. Khalid, MD, neurosurgery resident at University of Illinois Chicago, told this news organization.
The findings were presented on May 3 at the American Association of Neurological Surgeons (AANS) 2024 Annual Meeting.
Additional Surgery at Year 1
The new study used the all-payer Mariner database to identify patients aged 18-74 years with type 2 diabetes who underwent elective one- to three-level transforaminal lumbar interbody fusions (TLIFs) between January 2018 and October 2022.
Patients were matched in a 3:1 ratio for age, sex, hypertension, obesity, smoking history, chronic kidney disease, osteoporosis, insulin use, and spinal fusion level, resulting in 447 patients with semaglutide use and 1334 with no semaglutide use. More than half (56%) were female, 62% used insulin, and 81% underwent single-level TLIF.
Total medical complications were higher in the semaglutide group, at 13.4%, compared with 7.7% in the no-semaglutide group (odds ratio [OR], 1.85). This was driven by higher rates of urinary tract infection (6.7% vs 2.5%) and acute kidney injury (6.3% vs 3.9%), two complications observed with semaglutide in other studies, Dr. Khalid said.
Total surgical complications, however, were lower in patients taking semaglutide, at 3.8% vs 5.2% in those who did not (OR, 0.73).
Patients taking semaglutide vs those who were not using semaglutide had fewer wound healing complications (5 vs 31), hematoma (1 vs 9), surgical-site infections (12 vs 44), and cerebrospinal fluid leaks (2 vs 3).
Still, people taking semaglutide were nearly 12 times more likely to have an additional lumbar surgery at 1 year than did those who did not use the drug (27.3% vs 3.1%; OR, 11.79; 95% CI, 8.17-17.33).
Kaplan-Meier plots revealed a striking divergence of these populations when semaglutide exposure for more than or less than 9 months was examined (log-rank P < .0001).
Currently under review for publication, this study provides the first evidence on the impact of semaglutide on spine surgery, Dr. Khalid said. A second follow-up paper, also under review, looked only at patients with patients morbidly obesity without diabetes who had taken semaglutide for weight loss.
“In nondiabetic, morbidly obese patients undergoing spine surgery, we see a similar trend,” Dr. Khalid said.
Sarcopenia the Cause?
The additional surgeries were primarily extensions of constructs, with additional surgery and fusion at more levels, Dr. Khalid noted.
“The idea is that it could be the fact there is sarcopenia or muscle loss that’s taking place in conjunction with fat loss that’s causing that to happen,” Dr. Khalid said.
The mechanism remains speculative, but evidence from other areas examining frailty states has shown that those patients have weaker bones, sarcopenia, and worse outcomes with spine surgery, he noted.
The investigators plan to use artificial intelligence to evaluate changes in body composition after semaglutide use in patients who underwent imaging prior to spine surgery or even before back pain occurred. Because these medications are uptitrated over time, follow-up studies will also look at whether this change takes place with a certain dose, Dr. Khalid added.
On the basis of the current analysis of generic semaglutide alone, it’s not possible to say whether the use of other glucagon-like peptide 1 (GLP-1) receptor agonists will result in similar findings, but “the odds of a class effect are high,” Dr. Khalid said.
Commenting on the findings, Walavan Sivakumar, MD, director of neurosurgery at Pacific Neuroscience Institute, Los Angeles, noted that the timing of surgery is already an issue for patients taking semaglutide and other GLP-1 receptor agonists following recent guidance from the American Society of Anesthesiologists that suggests stopping GLP-1 receptor agonists prior to elective surgery to reduce the risk for complications associated with anesthesia.
“It’s an incredibly topical point and seems to be something showing up on a daily basis for clinicians all throughout neurosurgery,” Dr. Sivakumar said. “It’s thought-provoking and a great first start.”
Dr. Sivakumar also observed that frailty is a hot topic in all of neurosurgery. “That’s a major, major point that’s showing an impact on all surgical outcomes and it’s being heavily studied in the neurosurgical subsets right now. So that’s definitely a possible correlating factor.”
Dr. Khalid reported no financial relationships. Dr. Sivakumar reported serving as a consultant for Stryker.
A version of this article appeared on Medscape.com.
CHICAGO — The diabetes/weight loss drug semaglutide is associated with a significantly greater risk for repeat operations in patients with diabetes who require lumbar surgery, a new study suggests.
The risk for additional surgeries was even higher among patients taking the popular weight loss and diabetes drug for longer periods of time.
Investigators say the study provides the first evidence on the impact of semaglutide on spine surgery.
“The expectation was [that] we would see patients doing better after surgery, less wound complications, and other things, and in our diabetic patients we did not see that and saw increased odds of needing additional surgeries,” investigator Syed I. Khalid, MD, neurosurgery resident at University of Illinois Chicago, told this news organization.
The findings were presented on May 3 at the American Association of Neurological Surgeons (AANS) 2024 Annual Meeting.
Additional Surgery at Year 1
The new study used the all-payer Mariner database to identify patients aged 18-74 years with type 2 diabetes who underwent elective one- to three-level transforaminal lumbar interbody fusions (TLIFs) between January 2018 and October 2022.
Patients were matched in a 3:1 ratio for age, sex, hypertension, obesity, smoking history, chronic kidney disease, osteoporosis, insulin use, and spinal fusion level, resulting in 447 patients with semaglutide use and 1334 with no semaglutide use. More than half (56%) were female, 62% used insulin, and 81% underwent single-level TLIF.
Total medical complications were higher in the semaglutide group, at 13.4%, compared with 7.7% in the no-semaglutide group (odds ratio [OR], 1.85). This was driven by higher rates of urinary tract infection (6.7% vs 2.5%) and acute kidney injury (6.3% vs 3.9%), two complications observed with semaglutide in other studies, Dr. Khalid said.
Total surgical complications, however, were lower in patients taking semaglutide, at 3.8% vs 5.2% in those who did not (OR, 0.73).
Patients taking semaglutide vs those who were not using semaglutide had fewer wound healing complications (5 vs 31), hematoma (1 vs 9), surgical-site infections (12 vs 44), and cerebrospinal fluid leaks (2 vs 3).
Still, people taking semaglutide were nearly 12 times more likely to have an additional lumbar surgery at 1 year than did those who did not use the drug (27.3% vs 3.1%; OR, 11.79; 95% CI, 8.17-17.33).
Kaplan-Meier plots revealed a striking divergence of these populations when semaglutide exposure for more than or less than 9 months was examined (log-rank P < .0001).
Currently under review for publication, this study provides the first evidence on the impact of semaglutide on spine surgery, Dr. Khalid said. A second follow-up paper, also under review, looked only at patients with patients morbidly obesity without diabetes who had taken semaglutide for weight loss.
“In nondiabetic, morbidly obese patients undergoing spine surgery, we see a similar trend,” Dr. Khalid said.
Sarcopenia the Cause?
The additional surgeries were primarily extensions of constructs, with additional surgery and fusion at more levels, Dr. Khalid noted.
“The idea is that it could be the fact there is sarcopenia or muscle loss that’s taking place in conjunction with fat loss that’s causing that to happen,” Dr. Khalid said.
The mechanism remains speculative, but evidence from other areas examining frailty states has shown that those patients have weaker bones, sarcopenia, and worse outcomes with spine surgery, he noted.
The investigators plan to use artificial intelligence to evaluate changes in body composition after semaglutide use in patients who underwent imaging prior to spine surgery or even before back pain occurred. Because these medications are uptitrated over time, follow-up studies will also look at whether this change takes place with a certain dose, Dr. Khalid added.
On the basis of the current analysis of generic semaglutide alone, it’s not possible to say whether the use of other glucagon-like peptide 1 (GLP-1) receptor agonists will result in similar findings, but “the odds of a class effect are high,” Dr. Khalid said.
Commenting on the findings, Walavan Sivakumar, MD, director of neurosurgery at Pacific Neuroscience Institute, Los Angeles, noted that the timing of surgery is already an issue for patients taking semaglutide and other GLP-1 receptor agonists following recent guidance from the American Society of Anesthesiologists that suggests stopping GLP-1 receptor agonists prior to elective surgery to reduce the risk for complications associated with anesthesia.
“It’s an incredibly topical point and seems to be something showing up on a daily basis for clinicians all throughout neurosurgery,” Dr. Sivakumar said. “It’s thought-provoking and a great first start.”
Dr. Sivakumar also observed that frailty is a hot topic in all of neurosurgery. “That’s a major, major point that’s showing an impact on all surgical outcomes and it’s being heavily studied in the neurosurgical subsets right now. So that’s definitely a possible correlating factor.”
Dr. Khalid reported no financial relationships. Dr. Sivakumar reported serving as a consultant for Stryker.
A version of this article appeared on Medscape.com.