User login
Epilepsy
Pediatric epilepsy surgery may improve cognition and behavior
CHARLOTTE, NC – according to a study presented at the annual meeting of the Child Neurology Society. The presence of comorbidities such as mood disorders and autism may influence the likelihood of perceived improvement, whereas the type of surgery may not.
“The parents and the families of the patients perceive that, even if the patients are not completely seizure free, the behavior and cognitive outcomes are better if there is some sort of seizure improvement,” said Trishna Kantamneni, MD, director of pediatric epilepsy at UC Davis in Sacramento.
To assess behavioral and cognitive outcomes following pediatric epilepsy surgery and to identify factors that predict improvement, Dr. Kantamneni and colleagues at the Cleveland Clinic Epilepsy Center retrospectively reviewed 126 patients younger than 18 years who underwent epilepsy surgery for medically refractory epilepsy during 2009-2016.
The primary outcome measure was the Impact of Childhood Neurologic Disability Scale (ICNDS), a parent-reported scale that assesses the behavior, cognition, and physical or neurologic disability of children with epilepsy. Parents completed the ICNDS preoperatively and at 6, 12, and 24 months after surgery. The researchers constructed separate linear mixed effects models to identify predictors of postoperative changes in ICNDS score.
Of the 126 patients, 62.7% were male, the median duration of epilepsy was 4.7 years, and 69.8% were seizure-free at the 2-year follow-up. Postoperative ICNDS scores were available for 103 patients at 6 months and for 54 patients at 24 months.
Before surgery, the average total ICNDS score was 55.7. At 6 months after surgery, the average score was 34.6, and at 24 months, it was 32.1, representing significant improvement from baseline.
In addition, behavior, cognition, and epilepsy subscores also improved post operatively, and the improvement persisted through 24 months. ICNDS scores significantly improved “even in patients who were not seizure-free after surgery,” by an average of about 22 points, the researchers said.
The absence of comorbid autism, cognitive impairment, and global developmental impairment and the absence of anxiety, depression, and ADHD were predictors of improved total ICNDS scores. Tumor pathology and being seizure free at 2 years also predicted improved scores. Duration and type of epilepsy, the number of antiepileptic drugs that patients were taking before surgery, and lobe of surgery were not predictive of improved ICNDS scores.
Dr. Kantamneni had no relevant disclosures.
SOURCE: Kantamneni T et al. CNS 2019, Abstract 51.
CHARLOTTE, NC – according to a study presented at the annual meeting of the Child Neurology Society. The presence of comorbidities such as mood disorders and autism may influence the likelihood of perceived improvement, whereas the type of surgery may not.
“The parents and the families of the patients perceive that, even if the patients are not completely seizure free, the behavior and cognitive outcomes are better if there is some sort of seizure improvement,” said Trishna Kantamneni, MD, director of pediatric epilepsy at UC Davis in Sacramento.
To assess behavioral and cognitive outcomes following pediatric epilepsy surgery and to identify factors that predict improvement, Dr. Kantamneni and colleagues at the Cleveland Clinic Epilepsy Center retrospectively reviewed 126 patients younger than 18 years who underwent epilepsy surgery for medically refractory epilepsy during 2009-2016.
The primary outcome measure was the Impact of Childhood Neurologic Disability Scale (ICNDS), a parent-reported scale that assesses the behavior, cognition, and physical or neurologic disability of children with epilepsy. Parents completed the ICNDS preoperatively and at 6, 12, and 24 months after surgery. The researchers constructed separate linear mixed effects models to identify predictors of postoperative changes in ICNDS score.
Of the 126 patients, 62.7% were male, the median duration of epilepsy was 4.7 years, and 69.8% were seizure-free at the 2-year follow-up. Postoperative ICNDS scores were available for 103 patients at 6 months and for 54 patients at 24 months.
Before surgery, the average total ICNDS score was 55.7. At 6 months after surgery, the average score was 34.6, and at 24 months, it was 32.1, representing significant improvement from baseline.
In addition, behavior, cognition, and epilepsy subscores also improved post operatively, and the improvement persisted through 24 months. ICNDS scores significantly improved “even in patients who were not seizure-free after surgery,” by an average of about 22 points, the researchers said.
The absence of comorbid autism, cognitive impairment, and global developmental impairment and the absence of anxiety, depression, and ADHD were predictors of improved total ICNDS scores. Tumor pathology and being seizure free at 2 years also predicted improved scores. Duration and type of epilepsy, the number of antiepileptic drugs that patients were taking before surgery, and lobe of surgery were not predictive of improved ICNDS scores.
Dr. Kantamneni had no relevant disclosures.
SOURCE: Kantamneni T et al. CNS 2019, Abstract 51.
CHARLOTTE, NC – according to a study presented at the annual meeting of the Child Neurology Society. The presence of comorbidities such as mood disorders and autism may influence the likelihood of perceived improvement, whereas the type of surgery may not.
“The parents and the families of the patients perceive that, even if the patients are not completely seizure free, the behavior and cognitive outcomes are better if there is some sort of seizure improvement,” said Trishna Kantamneni, MD, director of pediatric epilepsy at UC Davis in Sacramento.
To assess behavioral and cognitive outcomes following pediatric epilepsy surgery and to identify factors that predict improvement, Dr. Kantamneni and colleagues at the Cleveland Clinic Epilepsy Center retrospectively reviewed 126 patients younger than 18 years who underwent epilepsy surgery for medically refractory epilepsy during 2009-2016.
The primary outcome measure was the Impact of Childhood Neurologic Disability Scale (ICNDS), a parent-reported scale that assesses the behavior, cognition, and physical or neurologic disability of children with epilepsy. Parents completed the ICNDS preoperatively and at 6, 12, and 24 months after surgery. The researchers constructed separate linear mixed effects models to identify predictors of postoperative changes in ICNDS score.
Of the 126 patients, 62.7% were male, the median duration of epilepsy was 4.7 years, and 69.8% were seizure-free at the 2-year follow-up. Postoperative ICNDS scores were available for 103 patients at 6 months and for 54 patients at 24 months.
Before surgery, the average total ICNDS score was 55.7. At 6 months after surgery, the average score was 34.6, and at 24 months, it was 32.1, representing significant improvement from baseline.
In addition, behavior, cognition, and epilepsy subscores also improved post operatively, and the improvement persisted through 24 months. ICNDS scores significantly improved “even in patients who were not seizure-free after surgery,” by an average of about 22 points, the researchers said.
The absence of comorbid autism, cognitive impairment, and global developmental impairment and the absence of anxiety, depression, and ADHD were predictors of improved total ICNDS scores. Tumor pathology and being seizure free at 2 years also predicted improved scores. Duration and type of epilepsy, the number of antiepileptic drugs that patients were taking before surgery, and lobe of surgery were not predictive of improved ICNDS scores.
Dr. Kantamneni had no relevant disclosures.
SOURCE: Kantamneni T et al. CNS 2019, Abstract 51.
REPORTING FROM CNS 2019
Delay in EEG monitoring associated with increased seizure duration in pediatric refractory status epilepticus
CHARLOTTE, NC – , according to a multicenter study that was presented at the annual meeting of the Child Neurology Society. Delays in initiating EEG monitoring are associated with longer seizure duration in this patient population.
Neurologists are advised to initiate continuous EEG monitoring rapidly for all cases of pediatric refractory status epilepticus. Little information is available, however, about patterns in the timing of EEG placement. In addition, the relationship between delays in the initiation of continuous EEG and outcomes of refractory status epilepticus are unknown. Dmitry Tchapyjnikov, MD, assistant professor of child neurology at Duke University in Durham, N.C., and colleagues evaluated trends in the time to continuous EEG initiation and examined whether delays are associated with longer seizure duration in children with refractory status epilepticus.
A retrospective analysis of pSERG data
Dr. Tchapyjnikov and colleagues analyzed data from 11 hospitals participating in the Pediatric Status Epilepticus Research Group (pSERG), a prospective, observational cohort. They focused on pediatric patients who were admitted from 2011 to 2017 with refractory status epilepticus, which they defined as a seizure that persisted after treatment with two or more antiseizure medications (ASMs), one of which had to be a nonbenzodiazepine ASM, or a continuous infusion. Eligible patients were between 1 month and 21 years old and had convulsive seizures at onset. Patients who had EEG placement before seizure onset were excluded.
The investigators included in their study 121 patients who had seizure durations of 3 or more hours. Based on an exploratory analysis of various time-point cutoffs, Dr. Tchapyjnikov and colleagues defined delayed continuous EEG placement as placement at more than 5 hours after seizure onset. They used the Kaplan–Meier estimator to assess time to continuous EEG and used covariate-adjusted proportional hazards models to examine the association between delay in continuous EEG placement and seizure duration.
EEG placement overall was delayed
The median time to continuous EEG placement after seizure onset was 9 hours. Approximately 4% of the children had continuous EEG placed within 1 hour, and 74% had it placed within 24 hours.
The investigators found that seizure onset outside the study hospital was associated with a higher likelihood of delayed time to EEG placement. “Females seemed to be more likely to have timely EEG placement,” said Dr. Tchapyjnikov. “I don’t have a physiological explanation for that.” The researchers saw no difference in treatment between patients who had timely EEG placement and those who had delayed EEG placement.
About 68% of children were having seizures at the time of continuous EEG placement. A presumed seizure etiology of CNS infection was associated with a higher likelihood of being in status epilepticus at the time of EEG placement. A history of epilepsy, developmental delay, or home ASM use, however, was associated with a lower likelihood of being in status epilepticus at time of EEG placement.
Dr. Tchapyjnikov’s group found that the 24-hour cumulative probability of seizure resolution was lower among patients who did not have continuous EEG initiation within 5 hours, compared with those who did (56% vs.70%). The association remained significant after the investigators adjusted the data for covariates that were independently associated with 24-hour seizure resolution (hazard ratio, 0.31).
The investigators included in their analysis patients who had seizure resolution before EEG placement, because restricting the analysis to patients who have persistent status epilepticus would have overemphasized the benefits of EEG, according to Dr. Tchapyjnikov. “Looking at the overall hazard ratios is a more conservative way of looking at these data.”
The study was not supported by external funding. Dr. Tchapyjnikov had no relevant disclosures.
CHARLOTTE, NC – , according to a multicenter study that was presented at the annual meeting of the Child Neurology Society. Delays in initiating EEG monitoring are associated with longer seizure duration in this patient population.
Neurologists are advised to initiate continuous EEG monitoring rapidly for all cases of pediatric refractory status epilepticus. Little information is available, however, about patterns in the timing of EEG placement. In addition, the relationship between delays in the initiation of continuous EEG and outcomes of refractory status epilepticus are unknown. Dmitry Tchapyjnikov, MD, assistant professor of child neurology at Duke University in Durham, N.C., and colleagues evaluated trends in the time to continuous EEG initiation and examined whether delays are associated with longer seizure duration in children with refractory status epilepticus.
A retrospective analysis of pSERG data
Dr. Tchapyjnikov and colleagues analyzed data from 11 hospitals participating in the Pediatric Status Epilepticus Research Group (pSERG), a prospective, observational cohort. They focused on pediatric patients who were admitted from 2011 to 2017 with refractory status epilepticus, which they defined as a seizure that persisted after treatment with two or more antiseizure medications (ASMs), one of which had to be a nonbenzodiazepine ASM, or a continuous infusion. Eligible patients were between 1 month and 21 years old and had convulsive seizures at onset. Patients who had EEG placement before seizure onset were excluded.
The investigators included in their study 121 patients who had seizure durations of 3 or more hours. Based on an exploratory analysis of various time-point cutoffs, Dr. Tchapyjnikov and colleagues defined delayed continuous EEG placement as placement at more than 5 hours after seizure onset. They used the Kaplan–Meier estimator to assess time to continuous EEG and used covariate-adjusted proportional hazards models to examine the association between delay in continuous EEG placement and seizure duration.
EEG placement overall was delayed
The median time to continuous EEG placement after seizure onset was 9 hours. Approximately 4% of the children had continuous EEG placed within 1 hour, and 74% had it placed within 24 hours.
The investigators found that seizure onset outside the study hospital was associated with a higher likelihood of delayed time to EEG placement. “Females seemed to be more likely to have timely EEG placement,” said Dr. Tchapyjnikov. “I don’t have a physiological explanation for that.” The researchers saw no difference in treatment between patients who had timely EEG placement and those who had delayed EEG placement.
About 68% of children were having seizures at the time of continuous EEG placement. A presumed seizure etiology of CNS infection was associated with a higher likelihood of being in status epilepticus at the time of EEG placement. A history of epilepsy, developmental delay, or home ASM use, however, was associated with a lower likelihood of being in status epilepticus at time of EEG placement.
Dr. Tchapyjnikov’s group found that the 24-hour cumulative probability of seizure resolution was lower among patients who did not have continuous EEG initiation within 5 hours, compared with those who did (56% vs.70%). The association remained significant after the investigators adjusted the data for covariates that were independently associated with 24-hour seizure resolution (hazard ratio, 0.31).
The investigators included in their analysis patients who had seizure resolution before EEG placement, because restricting the analysis to patients who have persistent status epilepticus would have overemphasized the benefits of EEG, according to Dr. Tchapyjnikov. “Looking at the overall hazard ratios is a more conservative way of looking at these data.”
The study was not supported by external funding. Dr. Tchapyjnikov had no relevant disclosures.
CHARLOTTE, NC – , according to a multicenter study that was presented at the annual meeting of the Child Neurology Society. Delays in initiating EEG monitoring are associated with longer seizure duration in this patient population.
Neurologists are advised to initiate continuous EEG monitoring rapidly for all cases of pediatric refractory status epilepticus. Little information is available, however, about patterns in the timing of EEG placement. In addition, the relationship between delays in the initiation of continuous EEG and outcomes of refractory status epilepticus are unknown. Dmitry Tchapyjnikov, MD, assistant professor of child neurology at Duke University in Durham, N.C., and colleagues evaluated trends in the time to continuous EEG initiation and examined whether delays are associated with longer seizure duration in children with refractory status epilepticus.
A retrospective analysis of pSERG data
Dr. Tchapyjnikov and colleagues analyzed data from 11 hospitals participating in the Pediatric Status Epilepticus Research Group (pSERG), a prospective, observational cohort. They focused on pediatric patients who were admitted from 2011 to 2017 with refractory status epilepticus, which they defined as a seizure that persisted after treatment with two or more antiseizure medications (ASMs), one of which had to be a nonbenzodiazepine ASM, or a continuous infusion. Eligible patients were between 1 month and 21 years old and had convulsive seizures at onset. Patients who had EEG placement before seizure onset were excluded.
The investigators included in their study 121 patients who had seizure durations of 3 or more hours. Based on an exploratory analysis of various time-point cutoffs, Dr. Tchapyjnikov and colleagues defined delayed continuous EEG placement as placement at more than 5 hours after seizure onset. They used the Kaplan–Meier estimator to assess time to continuous EEG and used covariate-adjusted proportional hazards models to examine the association between delay in continuous EEG placement and seizure duration.
EEG placement overall was delayed
The median time to continuous EEG placement after seizure onset was 9 hours. Approximately 4% of the children had continuous EEG placed within 1 hour, and 74% had it placed within 24 hours.
The investigators found that seizure onset outside the study hospital was associated with a higher likelihood of delayed time to EEG placement. “Females seemed to be more likely to have timely EEG placement,” said Dr. Tchapyjnikov. “I don’t have a physiological explanation for that.” The researchers saw no difference in treatment between patients who had timely EEG placement and those who had delayed EEG placement.
About 68% of children were having seizures at the time of continuous EEG placement. A presumed seizure etiology of CNS infection was associated with a higher likelihood of being in status epilepticus at the time of EEG placement. A history of epilepsy, developmental delay, or home ASM use, however, was associated with a lower likelihood of being in status epilepticus at time of EEG placement.
Dr. Tchapyjnikov’s group found that the 24-hour cumulative probability of seizure resolution was lower among patients who did not have continuous EEG initiation within 5 hours, compared with those who did (56% vs.70%). The association remained significant after the investigators adjusted the data for covariates that were independently associated with 24-hour seizure resolution (hazard ratio, 0.31).
The investigators included in their analysis patients who had seizure resolution before EEG placement, because restricting the analysis to patients who have persistent status epilepticus would have overemphasized the benefits of EEG, according to Dr. Tchapyjnikov. “Looking at the overall hazard ratios is a more conservative way of looking at these data.”
The study was not supported by external funding. Dr. Tchapyjnikov had no relevant disclosures.
REPORTING FROM CNS 2019
Does AED prophylaxis delay seizure onset in children with brain tumors?
CHARLOTTE, N.C. – according to research presented at the annual meeting of the Child Neurology Society. Levetiracetam, oxcarbazepine, and phenytoin are the most common initial prophylactic AEDs administered to children with brain tumors, the researchers said.
The literature indicates that between 20% and 35% of children with brain tumors have seizures, and up to half of these patients have seizure as their presenting symptom. Common practice is to prescribe antiseizure medication after a child has had a first seizure, because the risk for recurrence is high. In 2000, the American Academy of Neurology discouraged prophylactic use of AEDs in children, citing a lack of evidence for efficacy. Most of the data that it reviewed, however, came from adults.
Michelle Yun, a medical student at Weill Cornell Medical College, New York, and colleagues used national Medicaid claims data that had been collected between 2009 and 2012 for children with seizures to conduct a retrospective, observational, case-control study. They included children aged 0-20 years with a diagnosis of brain tumor, a seizure diagnosis within 6 months after brain tumor diagnosis, an AED prescription, and 12 continuous months of Medicaid coverage following brain tumor diagnosis in their analysis. The investigators defined seizure prophylaxis as AED prescription within 30 days after brain tumor diagnosis but before a first seizure diagnosis.
The exposure in the study was AED prescription within 45 days of diagnosis, and the outcome was the time to first seizure. Ms. Yun and colleagues also analyzed the most common initial prophylactic AEDs and the proportion of cases with first seizure diagnosis after prophylactic AED discontinuation, which was defined as a treatment gap longer than 30 days. The study covariates included age, sex, race, ethnicity, and medical comorbidities.
In all, 218 children were included in the study; 40 received AED prophylaxis and 26 received it within 45 days of brain tumor diagnosis. Patients with and without AED prophylaxis were well matched on all covariates.
At 1 year, Ms. Yun and colleagues saw no difference in time to first seizure between the two groups. The median time to first seizure was 75 days in the prophylaxis group and 80 days in the no-prophylaxis group. The researchers observed a transient separation between the two groups, however, in the early months after brain tumor diagnosis. When they examined children who had a seizure during the first 6 months of follow-up, the median time to diagnosis of first seizure was 68 days in children with prophylaxis and 34 days in the no-prophylaxis group. The difference between groups was statistically significant. “When we added all the covariates of interest, we found that there was a protective effect in these children with early seizures,” said Ms. Yun.
Among the study limitations that Ms. Yun acknowledged were its observational, retrospective design and its small sample size. Medicaid data themselves are limited, since states do not report them in a uniform manner, and the data do not include much clinical information. “Something that would be helpful is a prospective clinical study,” Ms. Yun concluded.
The Weill Cornell Clinical and Translational Science Center and the American Academy of Neurology provided funding for the study. The Pediatric Epilepsy Research Foundation provided the Medicaid data. Ms. Yun had no relevant disclosures.
SOURCE: Yun M et al. CNS 2019, Abstract PL2-1.
CHARLOTTE, N.C. – according to research presented at the annual meeting of the Child Neurology Society. Levetiracetam, oxcarbazepine, and phenytoin are the most common initial prophylactic AEDs administered to children with brain tumors, the researchers said.
The literature indicates that between 20% and 35% of children with brain tumors have seizures, and up to half of these patients have seizure as their presenting symptom. Common practice is to prescribe antiseizure medication after a child has had a first seizure, because the risk for recurrence is high. In 2000, the American Academy of Neurology discouraged prophylactic use of AEDs in children, citing a lack of evidence for efficacy. Most of the data that it reviewed, however, came from adults.
Michelle Yun, a medical student at Weill Cornell Medical College, New York, and colleagues used national Medicaid claims data that had been collected between 2009 and 2012 for children with seizures to conduct a retrospective, observational, case-control study. They included children aged 0-20 years with a diagnosis of brain tumor, a seizure diagnosis within 6 months after brain tumor diagnosis, an AED prescription, and 12 continuous months of Medicaid coverage following brain tumor diagnosis in their analysis. The investigators defined seizure prophylaxis as AED prescription within 30 days after brain tumor diagnosis but before a first seizure diagnosis.
The exposure in the study was AED prescription within 45 days of diagnosis, and the outcome was the time to first seizure. Ms. Yun and colleagues also analyzed the most common initial prophylactic AEDs and the proportion of cases with first seizure diagnosis after prophylactic AED discontinuation, which was defined as a treatment gap longer than 30 days. The study covariates included age, sex, race, ethnicity, and medical comorbidities.
In all, 218 children were included in the study; 40 received AED prophylaxis and 26 received it within 45 days of brain tumor diagnosis. Patients with and without AED prophylaxis were well matched on all covariates.
At 1 year, Ms. Yun and colleagues saw no difference in time to first seizure between the two groups. The median time to first seizure was 75 days in the prophylaxis group and 80 days in the no-prophylaxis group. The researchers observed a transient separation between the two groups, however, in the early months after brain tumor diagnosis. When they examined children who had a seizure during the first 6 months of follow-up, the median time to diagnosis of first seizure was 68 days in children with prophylaxis and 34 days in the no-prophylaxis group. The difference between groups was statistically significant. “When we added all the covariates of interest, we found that there was a protective effect in these children with early seizures,” said Ms. Yun.
Among the study limitations that Ms. Yun acknowledged were its observational, retrospective design and its small sample size. Medicaid data themselves are limited, since states do not report them in a uniform manner, and the data do not include much clinical information. “Something that would be helpful is a prospective clinical study,” Ms. Yun concluded.
The Weill Cornell Clinical and Translational Science Center and the American Academy of Neurology provided funding for the study. The Pediatric Epilepsy Research Foundation provided the Medicaid data. Ms. Yun had no relevant disclosures.
SOURCE: Yun M et al. CNS 2019, Abstract PL2-1.
CHARLOTTE, N.C. – according to research presented at the annual meeting of the Child Neurology Society. Levetiracetam, oxcarbazepine, and phenytoin are the most common initial prophylactic AEDs administered to children with brain tumors, the researchers said.
The literature indicates that between 20% and 35% of children with brain tumors have seizures, and up to half of these patients have seizure as their presenting symptom. Common practice is to prescribe antiseizure medication after a child has had a first seizure, because the risk for recurrence is high. In 2000, the American Academy of Neurology discouraged prophylactic use of AEDs in children, citing a lack of evidence for efficacy. Most of the data that it reviewed, however, came from adults.
Michelle Yun, a medical student at Weill Cornell Medical College, New York, and colleagues used national Medicaid claims data that had been collected between 2009 and 2012 for children with seizures to conduct a retrospective, observational, case-control study. They included children aged 0-20 years with a diagnosis of brain tumor, a seizure diagnosis within 6 months after brain tumor diagnosis, an AED prescription, and 12 continuous months of Medicaid coverage following brain tumor diagnosis in their analysis. The investigators defined seizure prophylaxis as AED prescription within 30 days after brain tumor diagnosis but before a first seizure diagnosis.
The exposure in the study was AED prescription within 45 days of diagnosis, and the outcome was the time to first seizure. Ms. Yun and colleagues also analyzed the most common initial prophylactic AEDs and the proportion of cases with first seizure diagnosis after prophylactic AED discontinuation, which was defined as a treatment gap longer than 30 days. The study covariates included age, sex, race, ethnicity, and medical comorbidities.
In all, 218 children were included in the study; 40 received AED prophylaxis and 26 received it within 45 days of brain tumor diagnosis. Patients with and without AED prophylaxis were well matched on all covariates.
At 1 year, Ms. Yun and colleagues saw no difference in time to first seizure between the two groups. The median time to first seizure was 75 days in the prophylaxis group and 80 days in the no-prophylaxis group. The researchers observed a transient separation between the two groups, however, in the early months after brain tumor diagnosis. When they examined children who had a seizure during the first 6 months of follow-up, the median time to diagnosis of first seizure was 68 days in children with prophylaxis and 34 days in the no-prophylaxis group. The difference between groups was statistically significant. “When we added all the covariates of interest, we found that there was a protective effect in these children with early seizures,” said Ms. Yun.
Among the study limitations that Ms. Yun acknowledged were its observational, retrospective design and its small sample size. Medicaid data themselves are limited, since states do not report them in a uniform manner, and the data do not include much clinical information. “Something that would be helpful is a prospective clinical study,” Ms. Yun concluded.
The Weill Cornell Clinical and Translational Science Center and the American Academy of Neurology provided funding for the study. The Pediatric Epilepsy Research Foundation provided the Medicaid data. Ms. Yun had no relevant disclosures.
SOURCE: Yun M et al. CNS 2019, Abstract PL2-1.
REPORTING FROM CNS 2019
CBD: What physicians need to know about it
Cannabidiol is a derivative of marijuana that is sold everywhere from medical marijuana stores to health food markets to gas stations. While this chemical is derived from marijuana plants, it can be sold in many states as a supplement and is largely unregulated. The ubiquity of cannabidiol (CBD) and its potential benefits means that doctors need to be able to counsel patients about what we know, what we don’t, and how to use it safely. For conditions such as chronic pain and addiction, where we have few safe and effective alternatives, CBD may be reasonable to recommend.
To find out what physicians need to know about CBD, Elisabeth Poorman, MD, a general internist at a University of Washington neighborhood clinic in Kent and member of the editorial advisory board of Internal Medicine News, interviewed Peter Grinspoon, MD, who provides free consultation to primary care patients on the benefits and risks of using various forms of cannabis, including CBD. Dr. Grinspoon is an internist at Massachusetts General Hospital Chelsea Healthcare Center and is an instructor at Harvard Medical School, Boston. He has contributed to the Harvard Health Blog on the topic of medical marijuana, delivered grand rounds on cannabis at Massachusetts General Hospital, and lectured at the American College of Physicians. Dr. Grinspoon is also medical director for Galenas, a medical marijuana company.
Dr. Grinspoon is the son of Lester Grinspoon, MD, associate professor emeritus of psychiatry at Harvard Medical School, who researched the medicinal legitimacy of marijuana prohibition and has authored books on the medical benefits of marijuana.
and his knowledge of CBD’s efficacy for various medical conditions. Below are excerpts from that conversation.
Dr. Poorman: How do you explain the difference between THC and CBD to patients?
Dr. Grinspoon: Cannabis contains at least a hundred different chemicals called cannabinoids, of which tetrahydrocannabinol (THC) and CBD are the most prevalent. THC is the one that gets you high and can be used recreationally and medically. The CBD molecule is not intoxicating, and people use it for a variety of medical purposes, most commonly to treat anxiety, insomnia, and pain.
Dr. Poorman: There are a lot of gaps in what we now about CBD’s potential benefits. Why don’t we know more?
Dr. Grinspoon: CBD has no abuse liability according to the World Health Organization, but because it is a cannabinoid, it is still technically a schedule I substance under the Controlled Substances Act, and that makes it difficult to study.
Dr. Poorman: What kinds of conditions can CBD treat?
Dr. Grinspoon: In anxiety, the enthusiasm has outpaced the science; there’s no question about that. And most of the studies have done in animals. That said, some studies have shown that CBD helps treat components of anxiety, like public speaking. Unlike THC, it is nonintoxicating and non–habit forming. But we don’t have the wealth of randomized controlled trials that we have for official psychiatric medications.
CBD’s benefits have been most extensively studied in pediatric epilepsy. The one Food and Drug Administration–approved drug derived from cannabis is Epidiolex, used to treat rare forms of childhood epilepsy. There is some evidence that as an adjunct, it can be used for glioblastoma multiforme in patients receiving other appropriate therapy. There is also some preliminary evidence that it can be used for addiction, including to opioids, cannabis, tobacco, and stimulants.
Most of the evidence for using CBD in chronic pain comes from animal studies, including a study published in the European Journal of Pain in 2016. Among my patients to whom I have suggested CBD for chronic pain, a few have noticed great benefit, a few have noticed some benefit, and a lot have noticed no benefit. For those who have said they noticed benefit it is unclear whether that benefit was just the placebo effect.
In insomnia, I usually have them take CBD under the tongue half an hour time before bedtime, or if it’s an edible, an hour before bedtime. I start with a lower dose and slowly try higher doses. I also encourage them to do the other sleep hygiene things, like no screens, increasing exercise, and decreasing caffeine. It seems that CBD helps them fall asleep, though it’s hard to know if it’s the CBD or the fact that they have started taking something, and have simultaneously made various lifestyle changes.
Dr. Poorman: Can CBD interfere with your normal sleep architecture, the way benzodiazepines and Benadryl can?
Dr. Grinspoon: We know that THC affects your sleep architecture and affects what percentage of REM sleep you have. But I don’t know if the effects of CBD on sleep architecture have been studied.
Dr. Poorman: What harms do you counsel patients about when discussing CBD?
Dr. Grinspoon: There are four main harms. The first is the price. It’s overpriced, and the doses are very low. In most animal studies, the doses are about 20 milligrams per kilogram of weight. And you go to the market, and it’s like a dollar for a hundredth of that.
Number two is that it’s not regulated; it’s a supplement. A few years ago, the government tested a bunch of samples of CBD, and some didn’t actually contain CBD, some didn’t have the right amount; and worse, some contained THC that had not been disclosed in the packaging. So you can’t just go to a roadside gas station and assume that if you buy CBD, it’s actually that. You want a place that has a certificate of assurance. Make sure third-party testing was done, including testing for pesticides and other heavy metals.
The third thing is drug interactions. It affects the body like grapefruit and inhibits the cytochrome P450 system. The medications doctors should be most concerned about are blood thinners like Coumadin. And if you’re on blood thinners, you definitely want to tell your doctor that you are on CBD and he or she might want to check your blood levels more frequently than they usually do.
The fourth concern is liver inflammation. In the childhood epilepsy studies, a bump in some liver enzymes was seen, although I haven’t heard of any clinically significant cases of chemical hepatitis related to CBD. But if someone has liver disease you want to keep an eye on their liver enzymes.
Dr. Poorman: What methods of ingestion do you recommend or not recommend?
Dr. Grinspoon: It’s basically trial and error, but I usually recommend oral form. If people feel comfortable taking a gummy bear, or a pill, I’m not particular about that. If the product being taken contains less than 0.3% THC, it won’t get you high.
The topical form probably works better for treating chronic pain if it contains some THC, suggests a review article published in the Cleveland Clinic Journal of Medicine. Topical THC is nonintoxicating, unless you managed to sit in a bathtub for 8 hours after applying it.
I don’t recommend smoking CBD, and right now, I don’t recommend vaping anything.
If people have severe pain, like moderately severe arthritis, CBD may not be enough, whereas medical cannabis with THC could help, a report suggests.
Dr. Poorman: Do you ever encourage patients to stop using CBD products?
Dr. Grinspoon: I work in a low-income area, and my patients don’t have a ton of disposable income. If it’s not working, I worry about the expense.
Dr. Poorman: The CBD industry is growing quickly. What changes are you seeing in what products are out there, and what changes would you like to see?
Dr. Grinspoon: CBD is being put in everything, and it’s comical. On the one hand, you can say if people want to waste their money on a CBD emitting pillowcase, that’s fine. On the other hand, you can say that certainly seems like misleading advertising, because a CBD emitting pillowcase isn’t going to help you sleep any better.
I think the purported benefits are far beyond what we can say scientifically. We do know that CBD has anti-inflammatory characteristics. But that doesn’t mean that putting CBD in all skin products is good for your skin. It’s bad for your pocketbook, though. I would like there to be less of a gap between the claims and the science.
Dr. Elisabeth Poorman has no conflicts to disclose.
Cannabidiol is a derivative of marijuana that is sold everywhere from medical marijuana stores to health food markets to gas stations. While this chemical is derived from marijuana plants, it can be sold in many states as a supplement and is largely unregulated. The ubiquity of cannabidiol (CBD) and its potential benefits means that doctors need to be able to counsel patients about what we know, what we don’t, and how to use it safely. For conditions such as chronic pain and addiction, where we have few safe and effective alternatives, CBD may be reasonable to recommend.
To find out what physicians need to know about CBD, Elisabeth Poorman, MD, a general internist at a University of Washington neighborhood clinic in Kent and member of the editorial advisory board of Internal Medicine News, interviewed Peter Grinspoon, MD, who provides free consultation to primary care patients on the benefits and risks of using various forms of cannabis, including CBD. Dr. Grinspoon is an internist at Massachusetts General Hospital Chelsea Healthcare Center and is an instructor at Harvard Medical School, Boston. He has contributed to the Harvard Health Blog on the topic of medical marijuana, delivered grand rounds on cannabis at Massachusetts General Hospital, and lectured at the American College of Physicians. Dr. Grinspoon is also medical director for Galenas, a medical marijuana company.
Dr. Grinspoon is the son of Lester Grinspoon, MD, associate professor emeritus of psychiatry at Harvard Medical School, who researched the medicinal legitimacy of marijuana prohibition and has authored books on the medical benefits of marijuana.
and his knowledge of CBD’s efficacy for various medical conditions. Below are excerpts from that conversation.
Dr. Poorman: How do you explain the difference between THC and CBD to patients?
Dr. Grinspoon: Cannabis contains at least a hundred different chemicals called cannabinoids, of which tetrahydrocannabinol (THC) and CBD are the most prevalent. THC is the one that gets you high and can be used recreationally and medically. The CBD molecule is not intoxicating, and people use it for a variety of medical purposes, most commonly to treat anxiety, insomnia, and pain.
Dr. Poorman: There are a lot of gaps in what we now about CBD’s potential benefits. Why don’t we know more?
Dr. Grinspoon: CBD has no abuse liability according to the World Health Organization, but because it is a cannabinoid, it is still technically a schedule I substance under the Controlled Substances Act, and that makes it difficult to study.
Dr. Poorman: What kinds of conditions can CBD treat?
Dr. Grinspoon: In anxiety, the enthusiasm has outpaced the science; there’s no question about that. And most of the studies have done in animals. That said, some studies have shown that CBD helps treat components of anxiety, like public speaking. Unlike THC, it is nonintoxicating and non–habit forming. But we don’t have the wealth of randomized controlled trials that we have for official psychiatric medications.
CBD’s benefits have been most extensively studied in pediatric epilepsy. The one Food and Drug Administration–approved drug derived from cannabis is Epidiolex, used to treat rare forms of childhood epilepsy. There is some evidence that as an adjunct, it can be used for glioblastoma multiforme in patients receiving other appropriate therapy. There is also some preliminary evidence that it can be used for addiction, including to opioids, cannabis, tobacco, and stimulants.
Most of the evidence for using CBD in chronic pain comes from animal studies, including a study published in the European Journal of Pain in 2016. Among my patients to whom I have suggested CBD for chronic pain, a few have noticed great benefit, a few have noticed some benefit, and a lot have noticed no benefit. For those who have said they noticed benefit it is unclear whether that benefit was just the placebo effect.
In insomnia, I usually have them take CBD under the tongue half an hour time before bedtime, or if it’s an edible, an hour before bedtime. I start with a lower dose and slowly try higher doses. I also encourage them to do the other sleep hygiene things, like no screens, increasing exercise, and decreasing caffeine. It seems that CBD helps them fall asleep, though it’s hard to know if it’s the CBD or the fact that they have started taking something, and have simultaneously made various lifestyle changes.
Dr. Poorman: Can CBD interfere with your normal sleep architecture, the way benzodiazepines and Benadryl can?
Dr. Grinspoon: We know that THC affects your sleep architecture and affects what percentage of REM sleep you have. But I don’t know if the effects of CBD on sleep architecture have been studied.
Dr. Poorman: What harms do you counsel patients about when discussing CBD?
Dr. Grinspoon: There are four main harms. The first is the price. It’s overpriced, and the doses are very low. In most animal studies, the doses are about 20 milligrams per kilogram of weight. And you go to the market, and it’s like a dollar for a hundredth of that.
Number two is that it’s not regulated; it’s a supplement. A few years ago, the government tested a bunch of samples of CBD, and some didn’t actually contain CBD, some didn’t have the right amount; and worse, some contained THC that had not been disclosed in the packaging. So you can’t just go to a roadside gas station and assume that if you buy CBD, it’s actually that. You want a place that has a certificate of assurance. Make sure third-party testing was done, including testing for pesticides and other heavy metals.
The third thing is drug interactions. It affects the body like grapefruit and inhibits the cytochrome P450 system. The medications doctors should be most concerned about are blood thinners like Coumadin. And if you’re on blood thinners, you definitely want to tell your doctor that you are on CBD and he or she might want to check your blood levels more frequently than they usually do.
The fourth concern is liver inflammation. In the childhood epilepsy studies, a bump in some liver enzymes was seen, although I haven’t heard of any clinically significant cases of chemical hepatitis related to CBD. But if someone has liver disease you want to keep an eye on their liver enzymes.
Dr. Poorman: What methods of ingestion do you recommend or not recommend?
Dr. Grinspoon: It’s basically trial and error, but I usually recommend oral form. If people feel comfortable taking a gummy bear, or a pill, I’m not particular about that. If the product being taken contains less than 0.3% THC, it won’t get you high.
The topical form probably works better for treating chronic pain if it contains some THC, suggests a review article published in the Cleveland Clinic Journal of Medicine. Topical THC is nonintoxicating, unless you managed to sit in a bathtub for 8 hours after applying it.
I don’t recommend smoking CBD, and right now, I don’t recommend vaping anything.
If people have severe pain, like moderately severe arthritis, CBD may not be enough, whereas medical cannabis with THC could help, a report suggests.
Dr. Poorman: Do you ever encourage patients to stop using CBD products?
Dr. Grinspoon: I work in a low-income area, and my patients don’t have a ton of disposable income. If it’s not working, I worry about the expense.
Dr. Poorman: The CBD industry is growing quickly. What changes are you seeing in what products are out there, and what changes would you like to see?
Dr. Grinspoon: CBD is being put in everything, and it’s comical. On the one hand, you can say if people want to waste their money on a CBD emitting pillowcase, that’s fine. On the other hand, you can say that certainly seems like misleading advertising, because a CBD emitting pillowcase isn’t going to help you sleep any better.
I think the purported benefits are far beyond what we can say scientifically. We do know that CBD has anti-inflammatory characteristics. But that doesn’t mean that putting CBD in all skin products is good for your skin. It’s bad for your pocketbook, though. I would like there to be less of a gap between the claims and the science.
Dr. Elisabeth Poorman has no conflicts to disclose.
Cannabidiol is a derivative of marijuana that is sold everywhere from medical marijuana stores to health food markets to gas stations. While this chemical is derived from marijuana plants, it can be sold in many states as a supplement and is largely unregulated. The ubiquity of cannabidiol (CBD) and its potential benefits means that doctors need to be able to counsel patients about what we know, what we don’t, and how to use it safely. For conditions such as chronic pain and addiction, where we have few safe and effective alternatives, CBD may be reasonable to recommend.
To find out what physicians need to know about CBD, Elisabeth Poorman, MD, a general internist at a University of Washington neighborhood clinic in Kent and member of the editorial advisory board of Internal Medicine News, interviewed Peter Grinspoon, MD, who provides free consultation to primary care patients on the benefits and risks of using various forms of cannabis, including CBD. Dr. Grinspoon is an internist at Massachusetts General Hospital Chelsea Healthcare Center and is an instructor at Harvard Medical School, Boston. He has contributed to the Harvard Health Blog on the topic of medical marijuana, delivered grand rounds on cannabis at Massachusetts General Hospital, and lectured at the American College of Physicians. Dr. Grinspoon is also medical director for Galenas, a medical marijuana company.
Dr. Grinspoon is the son of Lester Grinspoon, MD, associate professor emeritus of psychiatry at Harvard Medical School, who researched the medicinal legitimacy of marijuana prohibition and has authored books on the medical benefits of marijuana.
and his knowledge of CBD’s efficacy for various medical conditions. Below are excerpts from that conversation.
Dr. Poorman: How do you explain the difference between THC and CBD to patients?
Dr. Grinspoon: Cannabis contains at least a hundred different chemicals called cannabinoids, of which tetrahydrocannabinol (THC) and CBD are the most prevalent. THC is the one that gets you high and can be used recreationally and medically. The CBD molecule is not intoxicating, and people use it for a variety of medical purposes, most commonly to treat anxiety, insomnia, and pain.
Dr. Poorman: There are a lot of gaps in what we now about CBD’s potential benefits. Why don’t we know more?
Dr. Grinspoon: CBD has no abuse liability according to the World Health Organization, but because it is a cannabinoid, it is still technically a schedule I substance under the Controlled Substances Act, and that makes it difficult to study.
Dr. Poorman: What kinds of conditions can CBD treat?
Dr. Grinspoon: In anxiety, the enthusiasm has outpaced the science; there’s no question about that. And most of the studies have done in animals. That said, some studies have shown that CBD helps treat components of anxiety, like public speaking. Unlike THC, it is nonintoxicating and non–habit forming. But we don’t have the wealth of randomized controlled trials that we have for official psychiatric medications.
CBD’s benefits have been most extensively studied in pediatric epilepsy. The one Food and Drug Administration–approved drug derived from cannabis is Epidiolex, used to treat rare forms of childhood epilepsy. There is some evidence that as an adjunct, it can be used for glioblastoma multiforme in patients receiving other appropriate therapy. There is also some preliminary evidence that it can be used for addiction, including to opioids, cannabis, tobacco, and stimulants.
Most of the evidence for using CBD in chronic pain comes from animal studies, including a study published in the European Journal of Pain in 2016. Among my patients to whom I have suggested CBD for chronic pain, a few have noticed great benefit, a few have noticed some benefit, and a lot have noticed no benefit. For those who have said they noticed benefit it is unclear whether that benefit was just the placebo effect.
In insomnia, I usually have them take CBD under the tongue half an hour time before bedtime, or if it’s an edible, an hour before bedtime. I start with a lower dose and slowly try higher doses. I also encourage them to do the other sleep hygiene things, like no screens, increasing exercise, and decreasing caffeine. It seems that CBD helps them fall asleep, though it’s hard to know if it’s the CBD or the fact that they have started taking something, and have simultaneously made various lifestyle changes.
Dr. Poorman: Can CBD interfere with your normal sleep architecture, the way benzodiazepines and Benadryl can?
Dr. Grinspoon: We know that THC affects your sleep architecture and affects what percentage of REM sleep you have. But I don’t know if the effects of CBD on sleep architecture have been studied.
Dr. Poorman: What harms do you counsel patients about when discussing CBD?
Dr. Grinspoon: There are four main harms. The first is the price. It’s overpriced, and the doses are very low. In most animal studies, the doses are about 20 milligrams per kilogram of weight. And you go to the market, and it’s like a dollar for a hundredth of that.
Number two is that it’s not regulated; it’s a supplement. A few years ago, the government tested a bunch of samples of CBD, and some didn’t actually contain CBD, some didn’t have the right amount; and worse, some contained THC that had not been disclosed in the packaging. So you can’t just go to a roadside gas station and assume that if you buy CBD, it’s actually that. You want a place that has a certificate of assurance. Make sure third-party testing was done, including testing for pesticides and other heavy metals.
The third thing is drug interactions. It affects the body like grapefruit and inhibits the cytochrome P450 system. The medications doctors should be most concerned about are blood thinners like Coumadin. And if you’re on blood thinners, you definitely want to tell your doctor that you are on CBD and he or she might want to check your blood levels more frequently than they usually do.
The fourth concern is liver inflammation. In the childhood epilepsy studies, a bump in some liver enzymes was seen, although I haven’t heard of any clinically significant cases of chemical hepatitis related to CBD. But if someone has liver disease you want to keep an eye on their liver enzymes.
Dr. Poorman: What methods of ingestion do you recommend or not recommend?
Dr. Grinspoon: It’s basically trial and error, but I usually recommend oral form. If people feel comfortable taking a gummy bear, or a pill, I’m not particular about that. If the product being taken contains less than 0.3% THC, it won’t get you high.
The topical form probably works better for treating chronic pain if it contains some THC, suggests a review article published in the Cleveland Clinic Journal of Medicine. Topical THC is nonintoxicating, unless you managed to sit in a bathtub for 8 hours after applying it.
I don’t recommend smoking CBD, and right now, I don’t recommend vaping anything.
If people have severe pain, like moderately severe arthritis, CBD may not be enough, whereas medical cannabis with THC could help, a report suggests.
Dr. Poorman: Do you ever encourage patients to stop using CBD products?
Dr. Grinspoon: I work in a low-income area, and my patients don’t have a ton of disposable income. If it’s not working, I worry about the expense.
Dr. Poorman: The CBD industry is growing quickly. What changes are you seeing in what products are out there, and what changes would you like to see?
Dr. Grinspoon: CBD is being put in everything, and it’s comical. On the one hand, you can say if people want to waste their money on a CBD emitting pillowcase, that’s fine. On the other hand, you can say that certainly seems like misleading advertising, because a CBD emitting pillowcase isn’t going to help you sleep any better.
I think the purported benefits are far beyond what we can say scientifically. We do know that CBD has anti-inflammatory characteristics. But that doesn’t mean that putting CBD in all skin products is good for your skin. It’s bad for your pocketbook, though. I would like there to be less of a gap between the claims and the science.
Dr. Elisabeth Poorman has no conflicts to disclose.
Is serum serotonin level associated with risk of seizure-related breathing dysfunction?
, according to research published online Sept. 4 in Neurology. The change in serotonin level may reflect physiologic changes that protect against harmful processes that promote sudden unexpected death in epilepsy (SUDEP), the authors wrote.
“Our results give new insight into a possible link between serotonin levels and breathing during and after seizure,” Samden D. Lhatoo, MD, professor of neurology at McGovern Medical School at the University of Texas Health Science Center in Houston, said in a press release. “This may give hope that perhaps someday new therapies could be developed that may help prevent SUDEP. However, our study was small, and much more research is needed to confirm our findings in larger groups before any treatment decisions can be made. It is also important to note that excess serotonin can be harmful, so we strongly recommend against anyone trying to find ways to increase their serotonin levels in response to our study findings.”
Animal and human studies have indicated that breathing dysfunction related to SUDEP may involve serotonergic pathways. Compared with controls, patients with SUDEP have fewer midline serotonergic neurons. Furthermore, a 2018 study suggested an association between severe seizures and decreased serotonergic tone in the postictal state.
Dr. Lhatoo and colleagues examined a prospective cohort of patients with intractable epilepsy to understand the relationship between serum serotonin levels, ictal central apnea (ICA), and postconvulsive central apnea (PCCA). Patients were aged 18 years or older, were admitted to the epilepsy monitoring unit from January 2015 to April 2018, and agreed to take part in an investigation of SUDEP biomarkers. Dr. Lhatoo and colleagues evaluated video EEG, plethysmography, capillary oxygen saturation, and ECG for 49 patients. After a patient had a clinical seizure, the researchers collected postictal and interictal venous blood samples from him or her to measure serum serotonin levels. They classified seizures using the International League Against Epilepsy 2017 seizure classification. Dr. Lhatoo and colleagues analyzed 49 seizures with and without ICA and 27 generalized convulsive seizures with and without PCCA.
Of the 49 patients, 29 were female. Participants’ mean age was 42 years, mean age at epilepsy onset was 25.2 years, and mean epilepsy duration was 16.8 years. The population’s mean body mass index was 28.9. Dr. Lhatoo and colleagues observed ICA in 17 of 49 (34.7%) seizures and PCCA in 8 of 27 (29.6%) seizures.
Postictal serum serotonin levels were significantly higher than interictal levels for seizures without ICA, but not for seizures with ICA. Among patients with generalized convulsive seizures without PCCA, serum serotonin levels were significantly increased postictally, compared with interictal levels, but not among patients with seizures with PCCA. The change in postictal and interictal serotonin levels also differed significantly between participants with and without PCCA. In patients without PCCA, an increase in serotonin was associated with an increase in heart rate, but not in patients with PCCA.
“Large postictal increases in serum serotonin may play a role in modulation of respiration in these patients,” wrote Dr. Lhatoo and colleagues. “Alternatively, the increase in serum serotonin that we measured may be a surrogate for an increase in brain serotonin levels that may depend on similar physiologic mechanisms, rather than serum serotonin directly stimulating breathing.” Low levels of postictal serum serotonin are associated with potentially harmful breathing phenomena that should be investigated in larger studies, the investigators concluded.
The study was funded by a grant from the National Institutes of Health. One author received a laboratory research grant from Zogenix.
SOURCE: Murugesan A et al. Neurology. 2019 Sep 3. doi: 10.1212/WNL.0000000000008244.
, according to research published online Sept. 4 in Neurology. The change in serotonin level may reflect physiologic changes that protect against harmful processes that promote sudden unexpected death in epilepsy (SUDEP), the authors wrote.
“Our results give new insight into a possible link between serotonin levels and breathing during and after seizure,” Samden D. Lhatoo, MD, professor of neurology at McGovern Medical School at the University of Texas Health Science Center in Houston, said in a press release. “This may give hope that perhaps someday new therapies could be developed that may help prevent SUDEP. However, our study was small, and much more research is needed to confirm our findings in larger groups before any treatment decisions can be made. It is also important to note that excess serotonin can be harmful, so we strongly recommend against anyone trying to find ways to increase their serotonin levels in response to our study findings.”
Animal and human studies have indicated that breathing dysfunction related to SUDEP may involve serotonergic pathways. Compared with controls, patients with SUDEP have fewer midline serotonergic neurons. Furthermore, a 2018 study suggested an association between severe seizures and decreased serotonergic tone in the postictal state.
Dr. Lhatoo and colleagues examined a prospective cohort of patients with intractable epilepsy to understand the relationship between serum serotonin levels, ictal central apnea (ICA), and postconvulsive central apnea (PCCA). Patients were aged 18 years or older, were admitted to the epilepsy monitoring unit from January 2015 to April 2018, and agreed to take part in an investigation of SUDEP biomarkers. Dr. Lhatoo and colleagues evaluated video EEG, plethysmography, capillary oxygen saturation, and ECG for 49 patients. After a patient had a clinical seizure, the researchers collected postictal and interictal venous blood samples from him or her to measure serum serotonin levels. They classified seizures using the International League Against Epilepsy 2017 seizure classification. Dr. Lhatoo and colleagues analyzed 49 seizures with and without ICA and 27 generalized convulsive seizures with and without PCCA.
Of the 49 patients, 29 were female. Participants’ mean age was 42 years, mean age at epilepsy onset was 25.2 years, and mean epilepsy duration was 16.8 years. The population’s mean body mass index was 28.9. Dr. Lhatoo and colleagues observed ICA in 17 of 49 (34.7%) seizures and PCCA in 8 of 27 (29.6%) seizures.
Postictal serum serotonin levels were significantly higher than interictal levels for seizures without ICA, but not for seizures with ICA. Among patients with generalized convulsive seizures without PCCA, serum serotonin levels were significantly increased postictally, compared with interictal levels, but not among patients with seizures with PCCA. The change in postictal and interictal serotonin levels also differed significantly between participants with and without PCCA. In patients without PCCA, an increase in serotonin was associated with an increase in heart rate, but not in patients with PCCA.
“Large postictal increases in serum serotonin may play a role in modulation of respiration in these patients,” wrote Dr. Lhatoo and colleagues. “Alternatively, the increase in serum serotonin that we measured may be a surrogate for an increase in brain serotonin levels that may depend on similar physiologic mechanisms, rather than serum serotonin directly stimulating breathing.” Low levels of postictal serum serotonin are associated with potentially harmful breathing phenomena that should be investigated in larger studies, the investigators concluded.
The study was funded by a grant from the National Institutes of Health. One author received a laboratory research grant from Zogenix.
SOURCE: Murugesan A et al. Neurology. 2019 Sep 3. doi: 10.1212/WNL.0000000000008244.
, according to research published online Sept. 4 in Neurology. The change in serotonin level may reflect physiologic changes that protect against harmful processes that promote sudden unexpected death in epilepsy (SUDEP), the authors wrote.
“Our results give new insight into a possible link between serotonin levels and breathing during and after seizure,” Samden D. Lhatoo, MD, professor of neurology at McGovern Medical School at the University of Texas Health Science Center in Houston, said in a press release. “This may give hope that perhaps someday new therapies could be developed that may help prevent SUDEP. However, our study was small, and much more research is needed to confirm our findings in larger groups before any treatment decisions can be made. It is also important to note that excess serotonin can be harmful, so we strongly recommend against anyone trying to find ways to increase their serotonin levels in response to our study findings.”
Animal and human studies have indicated that breathing dysfunction related to SUDEP may involve serotonergic pathways. Compared with controls, patients with SUDEP have fewer midline serotonergic neurons. Furthermore, a 2018 study suggested an association between severe seizures and decreased serotonergic tone in the postictal state.
Dr. Lhatoo and colleagues examined a prospective cohort of patients with intractable epilepsy to understand the relationship between serum serotonin levels, ictal central apnea (ICA), and postconvulsive central apnea (PCCA). Patients were aged 18 years or older, were admitted to the epilepsy monitoring unit from January 2015 to April 2018, and agreed to take part in an investigation of SUDEP biomarkers. Dr. Lhatoo and colleagues evaluated video EEG, plethysmography, capillary oxygen saturation, and ECG for 49 patients. After a patient had a clinical seizure, the researchers collected postictal and interictal venous blood samples from him or her to measure serum serotonin levels. They classified seizures using the International League Against Epilepsy 2017 seizure classification. Dr. Lhatoo and colleagues analyzed 49 seizures with and without ICA and 27 generalized convulsive seizures with and without PCCA.
Of the 49 patients, 29 were female. Participants’ mean age was 42 years, mean age at epilepsy onset was 25.2 years, and mean epilepsy duration was 16.8 years. The population’s mean body mass index was 28.9. Dr. Lhatoo and colleagues observed ICA in 17 of 49 (34.7%) seizures and PCCA in 8 of 27 (29.6%) seizures.
Postictal serum serotonin levels were significantly higher than interictal levels for seizures without ICA, but not for seizures with ICA. Among patients with generalized convulsive seizures without PCCA, serum serotonin levels were significantly increased postictally, compared with interictal levels, but not among patients with seizures with PCCA. The change in postictal and interictal serotonin levels also differed significantly between participants with and without PCCA. In patients without PCCA, an increase in serotonin was associated with an increase in heart rate, but not in patients with PCCA.
“Large postictal increases in serum serotonin may play a role in modulation of respiration in these patients,” wrote Dr. Lhatoo and colleagues. “Alternatively, the increase in serum serotonin that we measured may be a surrogate for an increase in brain serotonin levels that may depend on similar physiologic mechanisms, rather than serum serotonin directly stimulating breathing.” Low levels of postictal serum serotonin are associated with potentially harmful breathing phenomena that should be investigated in larger studies, the investigators concluded.
The study was funded by a grant from the National Institutes of Health. One author received a laboratory research grant from Zogenix.
SOURCE: Murugesan A et al. Neurology. 2019 Sep 3. doi: 10.1212/WNL.0000000000008244.
FROM NEUROLOGY
Key clinical point: Significant increases in serum serotonin after a seizure are associated with lower risk of seizure-related breathing dysfunction.
Major finding: In patients without ictal central apnea, mean interictal serotonin level was 109.1 ng/mL, and postictal levels were 139.8 ng/mL.
Study details: A prospective cohort study of 49 patients with intractable epilepsy.
Disclosures: The study was funded by a grant from the National Institutes of Health. One author received a laboratory research grant from Zogenix.
Source: Murugesan A et al. Neurology. 2019 Sep 3. doi: 10.1212/WNL.0000000000008244.
A new beverage aims to make ketogenic diets more palatable
BANGKOK –
Chief among those shortcomings is the notoriously poor compliance with these highly restrictive diets, which, as defining features, emphasize high fat intake and scrupulous restriction of carbohydrates in an effort to mimic the metabolic effects of starvation, J. Helen Cross, MD, explained at the International Epilepsy Congress.
She was a coauthor of a study led by Natasha E. Schoeler, PhD, a research dietician at the University College London Great Ormond Street Institute of Child Health, which demonstrated that children and adults with epilepsy who experience a significant antiseizure effect in response to ketogenic diet therapies have higher baseline blood levels of acetyl carnitine (Epilepsia. 2017 May;58(5):893-900).
The importance of this novel observation is twofold: It indicates a potential role for baseline acetyl carnitine level as a predictor of differential response to ketogenic diet therapies, a predictor for which there is an unmet need, and it is consistent with the hypothesis that an important potential mechanism of ketogenic diet effectiveness in epilepsy involves altered mitochondrial energy metabolism. That is because acetyl carnitine plays an essential role in mitochondrial uptake of long-chain fatty acids, noted Dr. Cross, professor of pediatric neurology and head of the developmental neurosciences program at the University College London Great Ormond Street Institute of Child Health.
At the congress sponsored by the International League Against Epilepsy, Dr. Cross and Dr. Schoeler presented the results of the initial 12-week tolerability study of Betashot, a ready-to-use, palatable blend of specific medium-chain triglycerides designed to be consumed three to four times daily with normal meals, limiting only intake of foods high in refined sugar. The Betashot beverage was developed in conjunction with Vitaflo International, a nutritional products company.
“It actually tastes good. It tastes like a strawberry shake,” according to Dr. Schoeler.
The 12-week study included 35 children with genetically caused forms of epilepsy and 26 adults with drug-resistant epilepsy. This was primarily a tolerability and compliance study, and the main finding was that two-thirds of the children and 69% of adults who started the study were still using Betashot at the 12-week mark. Moreover, 91% of the children and 56% of adults who completed the study elected to stay on Betashot afterwards. By week 12, after titrating their daily dose of Betashot upward as tolerated, the pediatric patients averaged 18% of their total daily energy intake from Betashot, the adults 24%.
The most common reasons for discontinuation among both children and adults were gastrointestinal side effects: abdominal discomfort, diarrhea, and/or vomiting.
“What’s exciting is that, even though the study is not powered to look at seizure response – it’s a tolerability study – we can report that there was a statistically significant reduction in the number of seizures in the group overall after 3 months of treatment,” Dr. Cross said.
She declined to provide specific data on seizure frequency because the study was underpowered for that endpoint. However, she added that further larger studies looking at a possible antiseizure effect of Betashot are ongoing.
The Betashot study was funded by Vitaflo International.
BANGKOK –
Chief among those shortcomings is the notoriously poor compliance with these highly restrictive diets, which, as defining features, emphasize high fat intake and scrupulous restriction of carbohydrates in an effort to mimic the metabolic effects of starvation, J. Helen Cross, MD, explained at the International Epilepsy Congress.
She was a coauthor of a study led by Natasha E. Schoeler, PhD, a research dietician at the University College London Great Ormond Street Institute of Child Health, which demonstrated that children and adults with epilepsy who experience a significant antiseizure effect in response to ketogenic diet therapies have higher baseline blood levels of acetyl carnitine (Epilepsia. 2017 May;58(5):893-900).
The importance of this novel observation is twofold: It indicates a potential role for baseline acetyl carnitine level as a predictor of differential response to ketogenic diet therapies, a predictor for which there is an unmet need, and it is consistent with the hypothesis that an important potential mechanism of ketogenic diet effectiveness in epilepsy involves altered mitochondrial energy metabolism. That is because acetyl carnitine plays an essential role in mitochondrial uptake of long-chain fatty acids, noted Dr. Cross, professor of pediatric neurology and head of the developmental neurosciences program at the University College London Great Ormond Street Institute of Child Health.
At the congress sponsored by the International League Against Epilepsy, Dr. Cross and Dr. Schoeler presented the results of the initial 12-week tolerability study of Betashot, a ready-to-use, palatable blend of specific medium-chain triglycerides designed to be consumed three to four times daily with normal meals, limiting only intake of foods high in refined sugar. The Betashot beverage was developed in conjunction with Vitaflo International, a nutritional products company.
“It actually tastes good. It tastes like a strawberry shake,” according to Dr. Schoeler.
The 12-week study included 35 children with genetically caused forms of epilepsy and 26 adults with drug-resistant epilepsy. This was primarily a tolerability and compliance study, and the main finding was that two-thirds of the children and 69% of adults who started the study were still using Betashot at the 12-week mark. Moreover, 91% of the children and 56% of adults who completed the study elected to stay on Betashot afterwards. By week 12, after titrating their daily dose of Betashot upward as tolerated, the pediatric patients averaged 18% of their total daily energy intake from Betashot, the adults 24%.
The most common reasons for discontinuation among both children and adults were gastrointestinal side effects: abdominal discomfort, diarrhea, and/or vomiting.
“What’s exciting is that, even though the study is not powered to look at seizure response – it’s a tolerability study – we can report that there was a statistically significant reduction in the number of seizures in the group overall after 3 months of treatment,” Dr. Cross said.
She declined to provide specific data on seizure frequency because the study was underpowered for that endpoint. However, she added that further larger studies looking at a possible antiseizure effect of Betashot are ongoing.
The Betashot study was funded by Vitaflo International.
BANGKOK –
Chief among those shortcomings is the notoriously poor compliance with these highly restrictive diets, which, as defining features, emphasize high fat intake and scrupulous restriction of carbohydrates in an effort to mimic the metabolic effects of starvation, J. Helen Cross, MD, explained at the International Epilepsy Congress.
She was a coauthor of a study led by Natasha E. Schoeler, PhD, a research dietician at the University College London Great Ormond Street Institute of Child Health, which demonstrated that children and adults with epilepsy who experience a significant antiseizure effect in response to ketogenic diet therapies have higher baseline blood levels of acetyl carnitine (Epilepsia. 2017 May;58(5):893-900).
The importance of this novel observation is twofold: It indicates a potential role for baseline acetyl carnitine level as a predictor of differential response to ketogenic diet therapies, a predictor for which there is an unmet need, and it is consistent with the hypothesis that an important potential mechanism of ketogenic diet effectiveness in epilepsy involves altered mitochondrial energy metabolism. That is because acetyl carnitine plays an essential role in mitochondrial uptake of long-chain fatty acids, noted Dr. Cross, professor of pediatric neurology and head of the developmental neurosciences program at the University College London Great Ormond Street Institute of Child Health.
At the congress sponsored by the International League Against Epilepsy, Dr. Cross and Dr. Schoeler presented the results of the initial 12-week tolerability study of Betashot, a ready-to-use, palatable blend of specific medium-chain triglycerides designed to be consumed three to four times daily with normal meals, limiting only intake of foods high in refined sugar. The Betashot beverage was developed in conjunction with Vitaflo International, a nutritional products company.
“It actually tastes good. It tastes like a strawberry shake,” according to Dr. Schoeler.
The 12-week study included 35 children with genetically caused forms of epilepsy and 26 adults with drug-resistant epilepsy. This was primarily a tolerability and compliance study, and the main finding was that two-thirds of the children and 69% of adults who started the study were still using Betashot at the 12-week mark. Moreover, 91% of the children and 56% of adults who completed the study elected to stay on Betashot afterwards. By week 12, after titrating their daily dose of Betashot upward as tolerated, the pediatric patients averaged 18% of their total daily energy intake from Betashot, the adults 24%.
The most common reasons for discontinuation among both children and adults were gastrointestinal side effects: abdominal discomfort, diarrhea, and/or vomiting.
“What’s exciting is that, even though the study is not powered to look at seizure response – it’s a tolerability study – we can report that there was a statistically significant reduction in the number of seizures in the group overall after 3 months of treatment,” Dr. Cross said.
She declined to provide specific data on seizure frequency because the study was underpowered for that endpoint. However, she added that further larger studies looking at a possible antiseizure effect of Betashot are ongoing.
The Betashot study was funded by Vitaflo International.
REPORTING FROM IEC 2019
Mortality is high in pediatric superrefractory status epilepticus
BANGKOK – presented by Maggie Lo Yee Yau, MD, at the International Epilepsy Congress.
“Death in these children usually occurred within the first few days after admission to the pediatric ICU,” she said at the congress sponsored by the International League Against Epilepsy.
The study included 15 consecutive patients aged between 1 month and 17 years treated for superrefractory status epilepticus (SRSE) during 2011-2017 at the Chinese University of Hong Kong, where Dr. Yau practices. Seven children died during their index hospital admission, with a median time to death of 8 days. Two more died within several years post discharge.
Morbidity was substantial: At follow-up 1 year after the index episode of SRSE, two patients had a Glasgow Outcome Scale (GOS) score of 3, indicative of severe disability; three patients had moderate disability, with a GOS of 4; and two patients were in a vegetative state, with a GOS of 2, both of whom subsequently died of aspiration pneumonia. Only 1 of the 15 patients had a good recovery. Through 8 years of follow-up, all six survivors had epilepsy. Common nonneurologic deficits included a predisposition to a variety of infections.
By way of background, Dr. Yau noted that convulsive status epilepticus is the most common neurologic emergency in children, with an incidence of about 20 episodes per 100,000. Of affected children, 10%-40% develop refractory status, with reported mortality rates of 16%-43%. SRSE is a term reserved for persistent or recurrent seizures 24 hours or more after onset of general anesthesia for management of refractory status.
The impetus for Dr. Yau’s study was the dearth of data on SRSE in children. The literature consists of a few case series totaling well under 100 patients.
The Hong Kong case series included 15 patients with SRSE who had a median age of 7.9 years, only 1 of whom had preexisting epilepsy, a case of epileptic encephalopathy with severe developmental delay. Of the 15, 12 were boys. The patients were placed on a median of four antiepileptic drugs. Those who survived to discharge spent a median of 17.8 days under general anesthesia and 42.5 days in the pediatric ICU.
The SRSE etiologies included febrile infection–related epilepsy syndrome in two cases, four serious infections, four cases of autoimmune etiology, two cases of epileptic encephalopathy, one patient with hypoxia caused by severe croup, and two of unknown origin despite intensive work-up.
The four in-hospital deaths caused by acute cerebral edema occurred a median 6.5 days after admission. There were also two deaths because of uncontrolled sepsis and one because of intraventricular bleeding secondary to thrombotic thrombocytopenic purpura thought to have occurred as a complication of interactions between the numerous prescribed medications. All six children with an infectious or unknown etiology died in hospital, whereas none of those with an autoimmune etiology, epileptic encephalopathy, or hypoxia did. Duration of anesthesia did not predict mortality.
Other investigators have reported that younger age is associated with higher mortality, but that was not true in the Hong Kong experience. Neither of the two children aged less than 3 years died during their index hospitalization. All 7 deaths occurred in the 13 children age 3 years or older.
When asked whether she thought SRSE or the underlying disorder was the bigger contributor to mortality, Dr. Yau replied that she believes the prolonged refractory seizures may have worsened cerebral edema in some patients and thereby have been the cause of death.
She reported having no financial conflicts regarding her study.
BANGKOK – presented by Maggie Lo Yee Yau, MD, at the International Epilepsy Congress.
“Death in these children usually occurred within the first few days after admission to the pediatric ICU,” she said at the congress sponsored by the International League Against Epilepsy.
The study included 15 consecutive patients aged between 1 month and 17 years treated for superrefractory status epilepticus (SRSE) during 2011-2017 at the Chinese University of Hong Kong, where Dr. Yau practices. Seven children died during their index hospital admission, with a median time to death of 8 days. Two more died within several years post discharge.
Morbidity was substantial: At follow-up 1 year after the index episode of SRSE, two patients had a Glasgow Outcome Scale (GOS) score of 3, indicative of severe disability; three patients had moderate disability, with a GOS of 4; and two patients were in a vegetative state, with a GOS of 2, both of whom subsequently died of aspiration pneumonia. Only 1 of the 15 patients had a good recovery. Through 8 years of follow-up, all six survivors had epilepsy. Common nonneurologic deficits included a predisposition to a variety of infections.
By way of background, Dr. Yau noted that convulsive status epilepticus is the most common neurologic emergency in children, with an incidence of about 20 episodes per 100,000. Of affected children, 10%-40% develop refractory status, with reported mortality rates of 16%-43%. SRSE is a term reserved for persistent or recurrent seizures 24 hours or more after onset of general anesthesia for management of refractory status.
The impetus for Dr. Yau’s study was the dearth of data on SRSE in children. The literature consists of a few case series totaling well under 100 patients.
The Hong Kong case series included 15 patients with SRSE who had a median age of 7.9 years, only 1 of whom had preexisting epilepsy, a case of epileptic encephalopathy with severe developmental delay. Of the 15, 12 were boys. The patients were placed on a median of four antiepileptic drugs. Those who survived to discharge spent a median of 17.8 days under general anesthesia and 42.5 days in the pediatric ICU.
The SRSE etiologies included febrile infection–related epilepsy syndrome in two cases, four serious infections, four cases of autoimmune etiology, two cases of epileptic encephalopathy, one patient with hypoxia caused by severe croup, and two of unknown origin despite intensive work-up.
The four in-hospital deaths caused by acute cerebral edema occurred a median 6.5 days after admission. There were also two deaths because of uncontrolled sepsis and one because of intraventricular bleeding secondary to thrombotic thrombocytopenic purpura thought to have occurred as a complication of interactions between the numerous prescribed medications. All six children with an infectious or unknown etiology died in hospital, whereas none of those with an autoimmune etiology, epileptic encephalopathy, or hypoxia did. Duration of anesthesia did not predict mortality.
Other investigators have reported that younger age is associated with higher mortality, but that was not true in the Hong Kong experience. Neither of the two children aged less than 3 years died during their index hospitalization. All 7 deaths occurred in the 13 children age 3 years or older.
When asked whether she thought SRSE or the underlying disorder was the bigger contributor to mortality, Dr. Yau replied that she believes the prolonged refractory seizures may have worsened cerebral edema in some patients and thereby have been the cause of death.
She reported having no financial conflicts regarding her study.
BANGKOK – presented by Maggie Lo Yee Yau, MD, at the International Epilepsy Congress.
“Death in these children usually occurred within the first few days after admission to the pediatric ICU,” she said at the congress sponsored by the International League Against Epilepsy.
The study included 15 consecutive patients aged between 1 month and 17 years treated for superrefractory status epilepticus (SRSE) during 2011-2017 at the Chinese University of Hong Kong, where Dr. Yau practices. Seven children died during their index hospital admission, with a median time to death of 8 days. Two more died within several years post discharge.
Morbidity was substantial: At follow-up 1 year after the index episode of SRSE, two patients had a Glasgow Outcome Scale (GOS) score of 3, indicative of severe disability; three patients had moderate disability, with a GOS of 4; and two patients were in a vegetative state, with a GOS of 2, both of whom subsequently died of aspiration pneumonia. Only 1 of the 15 patients had a good recovery. Through 8 years of follow-up, all six survivors had epilepsy. Common nonneurologic deficits included a predisposition to a variety of infections.
By way of background, Dr. Yau noted that convulsive status epilepticus is the most common neurologic emergency in children, with an incidence of about 20 episodes per 100,000. Of affected children, 10%-40% develop refractory status, with reported mortality rates of 16%-43%. SRSE is a term reserved for persistent or recurrent seizures 24 hours or more after onset of general anesthesia for management of refractory status.
The impetus for Dr. Yau’s study was the dearth of data on SRSE in children. The literature consists of a few case series totaling well under 100 patients.
The Hong Kong case series included 15 patients with SRSE who had a median age of 7.9 years, only 1 of whom had preexisting epilepsy, a case of epileptic encephalopathy with severe developmental delay. Of the 15, 12 were boys. The patients were placed on a median of four antiepileptic drugs. Those who survived to discharge spent a median of 17.8 days under general anesthesia and 42.5 days in the pediatric ICU.
The SRSE etiologies included febrile infection–related epilepsy syndrome in two cases, four serious infections, four cases of autoimmune etiology, two cases of epileptic encephalopathy, one patient with hypoxia caused by severe croup, and two of unknown origin despite intensive work-up.
The four in-hospital deaths caused by acute cerebral edema occurred a median 6.5 days after admission. There were also two deaths because of uncontrolled sepsis and one because of intraventricular bleeding secondary to thrombotic thrombocytopenic purpura thought to have occurred as a complication of interactions between the numerous prescribed medications. All six children with an infectious or unknown etiology died in hospital, whereas none of those with an autoimmune etiology, epileptic encephalopathy, or hypoxia did. Duration of anesthesia did not predict mortality.
Other investigators have reported that younger age is associated with higher mortality, but that was not true in the Hong Kong experience. Neither of the two children aged less than 3 years died during their index hospitalization. All 7 deaths occurred in the 13 children age 3 years or older.
When asked whether she thought SRSE or the underlying disorder was the bigger contributor to mortality, Dr. Yau replied that she believes the prolonged refractory seizures may have worsened cerebral edema in some patients and thereby have been the cause of death.
She reported having no financial conflicts regarding her study.
REPORTING FROM IEC 2019
Cutaneous reaction to AEDs? Think autoimmune epilepsy
BANGKOK – Cutaneous reactions to antiepileptic drugs in patients with chronic epilepsy suggest increased likelihood of an autoimmune element to their seizure disorder, Fernando Cendes, MD, PhD, reported at the International Epilepsy Congress.
“My recommendation based on our findings is that if you have a patient who has a history of skin reactions to AEDs [antiepileptic drugs], or who has psychosis, or who has a very strange response to antiepileptic medication – meaning that at some points they are refractory and at other points they are very well controlled – I think those patients are probably at risk for having an autoantibody,” he said at the congress sponsored by the International League Against Epilepsy.
Screening for autoantibodies in such patients is appropriate. However, there’s a caveat: “The thing is, we don’t have evidence that treating these autoantibodies with immunotherapy will have any benefit on seizure control in these patients. We don’t have that data yet, but we are looking into it,” according to Dr. Cendes, professor of neurology at the State University of Campinas (Brazil).
He presented a study of 221 consecutive adults with severe chronic refractory epilepsy as evidenced by a mean disease duration of nearly 29 years, with an average of 5.93 seizures per month. A total of 77% had a structural etiology for their epilepsy, in most cases hippocampal sclerosis. In 19% of patients, the etiology was unknown. Overall, 95% of subjects had focal epilepsy, and the remainder had generalized epilepsy. All underwent serum testing for a variety of antibodies against neuronal surface antigens that have been implicated in encephalitis, seizures, and/or psychosis. Those who tested positive then underwent confirmatory testing of their cerebrospinal fluid.
The impetus for this study, the neurologist explained, is that although it’s now well established that seizures are a common clinical expression of acute- and subacute-phase autoimmune encephalitis marked by neuronal autoantibodies, little is known about the relationship between chronic epilepsy and such antibodies.
Only five Brazilian patients with chronic epilepsy, or 2.2%, tested positive for autoantibodies, all of whom had mesial temporal lobe epilepsy with hippocampal sclerosis. This suggests a possible autoimmune etiology for hippocampal sclerosis. Three of the five patients had anti-N-methyl-D-aspartate receptor antibodies (anti-NMDA) and two had antiglutamic acid decarboxylate antibodies (anti-GAD). No one was positive for anti–leucine-rich glioma-inactivated 1 antibodies (anti-LGI1), anti–contactin-associated proteinlike 2 (anti-caspr2), anti-glutamate receptor antibodies (anti-AMPAr), or anti–gamma-aminobutyric acid receptor antibodies (anti-GABAr).
The autoantibody-negative and the much smaller autoantibody-positive groups didn’t differ significantly in terms of demographics, seizure frequency, disease duration, drug resistance, cognitive impairment, comorbid autoimmune conditions, or history of status epilepticus. Indeed, only two between-group differences were found: fluctuation in seizure control was an issue in 10.6% of autoantibody-negative and 40% of autoantibody-positive patients, and cutaneous adverse reactions to antiepileptic drugs were noted in 10.6% of antibody-negative and 60% of antibody-positive patients. Psychiatric comorbidities were present in 49.5% of autoantibody-negative patients as compared with 80% – that is, four of five – who were autoantibody-positive, a trend that didn’t achieve statistical significance.
Asked if he thinks the autoantibodies found in a small subset of patients with chronic epilepsy were a cause or an effect of repeated seizures for so long, Dr. Cendes replied, “That’s a very interesting question, and I don’t have an answer, actually. But if seizures trigger development of these antibodies – and remember, this population we’re talking about had many, many seizures over the years – I would expect antibodies to be more frequent than the figure we found.”
He reported having no financial conflicts regarding his study.
SOURCE: Watanabe N et al. IEC 2019, Abstract P004.
BANGKOK – Cutaneous reactions to antiepileptic drugs in patients with chronic epilepsy suggest increased likelihood of an autoimmune element to their seizure disorder, Fernando Cendes, MD, PhD, reported at the International Epilepsy Congress.
“My recommendation based on our findings is that if you have a patient who has a history of skin reactions to AEDs [antiepileptic drugs], or who has psychosis, or who has a very strange response to antiepileptic medication – meaning that at some points they are refractory and at other points they are very well controlled – I think those patients are probably at risk for having an autoantibody,” he said at the congress sponsored by the International League Against Epilepsy.
Screening for autoantibodies in such patients is appropriate. However, there’s a caveat: “The thing is, we don’t have evidence that treating these autoantibodies with immunotherapy will have any benefit on seizure control in these patients. We don’t have that data yet, but we are looking into it,” according to Dr. Cendes, professor of neurology at the State University of Campinas (Brazil).
He presented a study of 221 consecutive adults with severe chronic refractory epilepsy as evidenced by a mean disease duration of nearly 29 years, with an average of 5.93 seizures per month. A total of 77% had a structural etiology for their epilepsy, in most cases hippocampal sclerosis. In 19% of patients, the etiology was unknown. Overall, 95% of subjects had focal epilepsy, and the remainder had generalized epilepsy. All underwent serum testing for a variety of antibodies against neuronal surface antigens that have been implicated in encephalitis, seizures, and/or psychosis. Those who tested positive then underwent confirmatory testing of their cerebrospinal fluid.
The impetus for this study, the neurologist explained, is that although it’s now well established that seizures are a common clinical expression of acute- and subacute-phase autoimmune encephalitis marked by neuronal autoantibodies, little is known about the relationship between chronic epilepsy and such antibodies.
Only five Brazilian patients with chronic epilepsy, or 2.2%, tested positive for autoantibodies, all of whom had mesial temporal lobe epilepsy with hippocampal sclerosis. This suggests a possible autoimmune etiology for hippocampal sclerosis. Three of the five patients had anti-N-methyl-D-aspartate receptor antibodies (anti-NMDA) and two had antiglutamic acid decarboxylate antibodies (anti-GAD). No one was positive for anti–leucine-rich glioma-inactivated 1 antibodies (anti-LGI1), anti–contactin-associated proteinlike 2 (anti-caspr2), anti-glutamate receptor antibodies (anti-AMPAr), or anti–gamma-aminobutyric acid receptor antibodies (anti-GABAr).
The autoantibody-negative and the much smaller autoantibody-positive groups didn’t differ significantly in terms of demographics, seizure frequency, disease duration, drug resistance, cognitive impairment, comorbid autoimmune conditions, or history of status epilepticus. Indeed, only two between-group differences were found: fluctuation in seizure control was an issue in 10.6% of autoantibody-negative and 40% of autoantibody-positive patients, and cutaneous adverse reactions to antiepileptic drugs were noted in 10.6% of antibody-negative and 60% of antibody-positive patients. Psychiatric comorbidities were present in 49.5% of autoantibody-negative patients as compared with 80% – that is, four of five – who were autoantibody-positive, a trend that didn’t achieve statistical significance.
Asked if he thinks the autoantibodies found in a small subset of patients with chronic epilepsy were a cause or an effect of repeated seizures for so long, Dr. Cendes replied, “That’s a very interesting question, and I don’t have an answer, actually. But if seizures trigger development of these antibodies – and remember, this population we’re talking about had many, many seizures over the years – I would expect antibodies to be more frequent than the figure we found.”
He reported having no financial conflicts regarding his study.
SOURCE: Watanabe N et al. IEC 2019, Abstract P004.
BANGKOK – Cutaneous reactions to antiepileptic drugs in patients with chronic epilepsy suggest increased likelihood of an autoimmune element to their seizure disorder, Fernando Cendes, MD, PhD, reported at the International Epilepsy Congress.
“My recommendation based on our findings is that if you have a patient who has a history of skin reactions to AEDs [antiepileptic drugs], or who has psychosis, or who has a very strange response to antiepileptic medication – meaning that at some points they are refractory and at other points they are very well controlled – I think those patients are probably at risk for having an autoantibody,” he said at the congress sponsored by the International League Against Epilepsy.
Screening for autoantibodies in such patients is appropriate. However, there’s a caveat: “The thing is, we don’t have evidence that treating these autoantibodies with immunotherapy will have any benefit on seizure control in these patients. We don’t have that data yet, but we are looking into it,” according to Dr. Cendes, professor of neurology at the State University of Campinas (Brazil).
He presented a study of 221 consecutive adults with severe chronic refractory epilepsy as evidenced by a mean disease duration of nearly 29 years, with an average of 5.93 seizures per month. A total of 77% had a structural etiology for their epilepsy, in most cases hippocampal sclerosis. In 19% of patients, the etiology was unknown. Overall, 95% of subjects had focal epilepsy, and the remainder had generalized epilepsy. All underwent serum testing for a variety of antibodies against neuronal surface antigens that have been implicated in encephalitis, seizures, and/or psychosis. Those who tested positive then underwent confirmatory testing of their cerebrospinal fluid.
The impetus for this study, the neurologist explained, is that although it’s now well established that seizures are a common clinical expression of acute- and subacute-phase autoimmune encephalitis marked by neuronal autoantibodies, little is known about the relationship between chronic epilepsy and such antibodies.
Only five Brazilian patients with chronic epilepsy, or 2.2%, tested positive for autoantibodies, all of whom had mesial temporal lobe epilepsy with hippocampal sclerosis. This suggests a possible autoimmune etiology for hippocampal sclerosis. Three of the five patients had anti-N-methyl-D-aspartate receptor antibodies (anti-NMDA) and two had antiglutamic acid decarboxylate antibodies (anti-GAD). No one was positive for anti–leucine-rich glioma-inactivated 1 antibodies (anti-LGI1), anti–contactin-associated proteinlike 2 (anti-caspr2), anti-glutamate receptor antibodies (anti-AMPAr), or anti–gamma-aminobutyric acid receptor antibodies (anti-GABAr).
The autoantibody-negative and the much smaller autoantibody-positive groups didn’t differ significantly in terms of demographics, seizure frequency, disease duration, drug resistance, cognitive impairment, comorbid autoimmune conditions, or history of status epilepticus. Indeed, only two between-group differences were found: fluctuation in seizure control was an issue in 10.6% of autoantibody-negative and 40% of autoantibody-positive patients, and cutaneous adverse reactions to antiepileptic drugs were noted in 10.6% of antibody-negative and 60% of antibody-positive patients. Psychiatric comorbidities were present in 49.5% of autoantibody-negative patients as compared with 80% – that is, four of five – who were autoantibody-positive, a trend that didn’t achieve statistical significance.
Asked if he thinks the autoantibodies found in a small subset of patients with chronic epilepsy were a cause or an effect of repeated seizures for so long, Dr. Cendes replied, “That’s a very interesting question, and I don’t have an answer, actually. But if seizures trigger development of these antibodies – and remember, this population we’re talking about had many, many seizures over the years – I would expect antibodies to be more frequent than the figure we found.”
He reported having no financial conflicts regarding his study.
SOURCE: Watanabe N et al. IEC 2019, Abstract P004.
REPORTING FROM IEC 2019
Insomnia symptoms correlate with seizure frequency
PHILADELPHIA – . Insomnia symptoms are not associated with epilepsy type, number of antiepileptic drugs (AEDs), or AED standardized dose, however.
“Given the potential benefits of sleep therapies on epilepsy outcomes, routine screening of insomnia symptoms is warranted,” said lead study author Thapanee Somboon, MD, a researcher at the sleep disorders center at Cleveland Clinic Neurological Institute in Ohio and at Prasat Neurological Institute in Bangkok.
Insomnia is common and associated with depression in patients with epilepsy, but prior studies that looked at the relationship between insomnia and epilepsy-related characteristics yielded limited and conflicting results, according to Dr. Somboon.
To evaluate potential associations between insomnia and epilepsy, Dr. Somboon and colleagues conducted a prospective analysis of data from 270 patients with epilepsy who presented to the Cleveland Clinic Epilepsy Center for an initial evaluation between January and August 2018. The patients completed the Insomnia Severity Index (ISI). An ISI score of 8 or greater indicated clinical insomnia symptoms, and an ISI score of 15 or greater indicated moderate or severe insomnia symptoms.
The researchers used Spearman’s correlation and the Kruskal-Wallis test to evaluate associations among insomnia symptoms and AED standardized dose, monthly seizure frequency, Patient Health Questionnaire (PHQ-9), Generalized Anxiety Disorder Questionnaire (GAD-7), and Quality of Life in Epilepsy-10 (QOLIE10).
Among the 270 patients, the average age was 43.5 years, 58% were female, 74% had focal epilepsy, and 26% had one or more seizures per month. The population’s median ISI score was 7. Nearly half had an ISI score of 8 or greater, and 23% had an ISI score of 15 or greater.
“A positive correlation was found between ISI and PHQ-9 (r = 0.64, P less than .001), GAD-7 (r = 0.68, P less than .001), QOLIE (r = 0.55, P less than .001), and monthly seizure frequency (r = 0.31, P less than .001),” the researchers reported. Insomnia symptoms had a significantly stronger correlation with PHQ-9 and GAD-7 than with seizure frequency.
Dr. Somboon had no disclosures. A coinvestigator has received research support from Jazz Pharmaceuticals.
SOURCE: Somboon T et al. AAN 2019, Abstract P3.6-026.
PHILADELPHIA – . Insomnia symptoms are not associated with epilepsy type, number of antiepileptic drugs (AEDs), or AED standardized dose, however.
“Given the potential benefits of sleep therapies on epilepsy outcomes, routine screening of insomnia symptoms is warranted,” said lead study author Thapanee Somboon, MD, a researcher at the sleep disorders center at Cleveland Clinic Neurological Institute in Ohio and at Prasat Neurological Institute in Bangkok.
Insomnia is common and associated with depression in patients with epilepsy, but prior studies that looked at the relationship between insomnia and epilepsy-related characteristics yielded limited and conflicting results, according to Dr. Somboon.
To evaluate potential associations between insomnia and epilepsy, Dr. Somboon and colleagues conducted a prospective analysis of data from 270 patients with epilepsy who presented to the Cleveland Clinic Epilepsy Center for an initial evaluation between January and August 2018. The patients completed the Insomnia Severity Index (ISI). An ISI score of 8 or greater indicated clinical insomnia symptoms, and an ISI score of 15 or greater indicated moderate or severe insomnia symptoms.
The researchers used Spearman’s correlation and the Kruskal-Wallis test to evaluate associations among insomnia symptoms and AED standardized dose, monthly seizure frequency, Patient Health Questionnaire (PHQ-9), Generalized Anxiety Disorder Questionnaire (GAD-7), and Quality of Life in Epilepsy-10 (QOLIE10).
Among the 270 patients, the average age was 43.5 years, 58% were female, 74% had focal epilepsy, and 26% had one or more seizures per month. The population’s median ISI score was 7. Nearly half had an ISI score of 8 or greater, and 23% had an ISI score of 15 or greater.
“A positive correlation was found between ISI and PHQ-9 (r = 0.64, P less than .001), GAD-7 (r = 0.68, P less than .001), QOLIE (r = 0.55, P less than .001), and monthly seizure frequency (r = 0.31, P less than .001),” the researchers reported. Insomnia symptoms had a significantly stronger correlation with PHQ-9 and GAD-7 than with seizure frequency.
Dr. Somboon had no disclosures. A coinvestigator has received research support from Jazz Pharmaceuticals.
SOURCE: Somboon T et al. AAN 2019, Abstract P3.6-026.
PHILADELPHIA – . Insomnia symptoms are not associated with epilepsy type, number of antiepileptic drugs (AEDs), or AED standardized dose, however.
“Given the potential benefits of sleep therapies on epilepsy outcomes, routine screening of insomnia symptoms is warranted,” said lead study author Thapanee Somboon, MD, a researcher at the sleep disorders center at Cleveland Clinic Neurological Institute in Ohio and at Prasat Neurological Institute in Bangkok.
Insomnia is common and associated with depression in patients with epilepsy, but prior studies that looked at the relationship between insomnia and epilepsy-related characteristics yielded limited and conflicting results, according to Dr. Somboon.
To evaluate potential associations between insomnia and epilepsy, Dr. Somboon and colleagues conducted a prospective analysis of data from 270 patients with epilepsy who presented to the Cleveland Clinic Epilepsy Center for an initial evaluation between January and August 2018. The patients completed the Insomnia Severity Index (ISI). An ISI score of 8 or greater indicated clinical insomnia symptoms, and an ISI score of 15 or greater indicated moderate or severe insomnia symptoms.
The researchers used Spearman’s correlation and the Kruskal-Wallis test to evaluate associations among insomnia symptoms and AED standardized dose, monthly seizure frequency, Patient Health Questionnaire (PHQ-9), Generalized Anxiety Disorder Questionnaire (GAD-7), and Quality of Life in Epilepsy-10 (QOLIE10).
Among the 270 patients, the average age was 43.5 years, 58% were female, 74% had focal epilepsy, and 26% had one or more seizures per month. The population’s median ISI score was 7. Nearly half had an ISI score of 8 or greater, and 23% had an ISI score of 15 or greater.
“A positive correlation was found between ISI and PHQ-9 (r = 0.64, P less than .001), GAD-7 (r = 0.68, P less than .001), QOLIE (r = 0.55, P less than .001), and monthly seizure frequency (r = 0.31, P less than .001),” the researchers reported. Insomnia symptoms had a significantly stronger correlation with PHQ-9 and GAD-7 than with seizure frequency.
Dr. Somboon had no disclosures. A coinvestigator has received research support from Jazz Pharmaceuticals.
SOURCE: Somboon T et al. AAN 2019, Abstract P3.6-026.
REPORTING FROM AAN 2019
More than one in six patients with status epilepticus are readmitted after hospital discharge
PHILADELPHIA – according to research presented at the annual meeting of the American Academy of Neurology. It is possible to identify patients at high risk of readmission, which could allow neurologists to reduce their clinical and economic burden, said the investigators.
Status epilepticus is a major neurologic emergency. Patients often have significant disability and may represent a burden on their families and on the health care system. To identify independent predictors of 30-day hospital readmission among patients discharged after generalized convulsive status epilepticus, Mohamad Rahwan, MD, a neurologist at the Medical University of South Carolina, Charleston, and colleagues examined data from the 2014 Nationwide Readmission Database.
The investigators included adults with a primary discharge diagnosis of generalized convulsive status epilepticus, identified by the ICD-9-CM code 345.3, in their study. Patients who died during hospitalization, had missing information on the length of stay, or were discharged in December 2014 were excluded from analysis. Dr. Rahwan and colleagues calculated the overall 30-day readmission rate for the sample and compared prespecified groups by their 30-day readmission status. They performed multiple logistic regression analysis to identify independent predictors of 30-day readmission, adjusting for potential confounders.
In all, 14,562 adults were discharged with a diagnosis of generalized convulsive status epilepticus. Of this population, 2,520 patients (17.3%) were readmitted within 30 days. Multivariate logistic regression analysis indicated that patients discharged against medical advice (odds ratio, 1.45), those discharged to short-term hospital (OR, 1.39), those with comorbid conditions (OR for Charlson Comorbidity Index of 1, 1.12; OR for Charlson Comorbidity Index of 2 or greater, 1.32), and those with a length of stay exceeding 6 days (OR, 1.42) had a greater risk of 30-day readmission. The researchers observed an inverse association for patients aged 45 years or older and for those in high-income households. “Greater attention to high-risk subgroups may identify opportunities to ameliorate the clinical and economic burden of early readmissions after generalized convulsive status epilepticus,” said the researchers.
The researchers had no disclosures.
SOURCE: Rahwan M et al. AAN 2019, Abstract S36.006.
PHILADELPHIA – according to research presented at the annual meeting of the American Academy of Neurology. It is possible to identify patients at high risk of readmission, which could allow neurologists to reduce their clinical and economic burden, said the investigators.
Status epilepticus is a major neurologic emergency. Patients often have significant disability and may represent a burden on their families and on the health care system. To identify independent predictors of 30-day hospital readmission among patients discharged after generalized convulsive status epilepticus, Mohamad Rahwan, MD, a neurologist at the Medical University of South Carolina, Charleston, and colleagues examined data from the 2014 Nationwide Readmission Database.
The investigators included adults with a primary discharge diagnosis of generalized convulsive status epilepticus, identified by the ICD-9-CM code 345.3, in their study. Patients who died during hospitalization, had missing information on the length of stay, or were discharged in December 2014 were excluded from analysis. Dr. Rahwan and colleagues calculated the overall 30-day readmission rate for the sample and compared prespecified groups by their 30-day readmission status. They performed multiple logistic regression analysis to identify independent predictors of 30-day readmission, adjusting for potential confounders.
In all, 14,562 adults were discharged with a diagnosis of generalized convulsive status epilepticus. Of this population, 2,520 patients (17.3%) were readmitted within 30 days. Multivariate logistic regression analysis indicated that patients discharged against medical advice (odds ratio, 1.45), those discharged to short-term hospital (OR, 1.39), those with comorbid conditions (OR for Charlson Comorbidity Index of 1, 1.12; OR for Charlson Comorbidity Index of 2 or greater, 1.32), and those with a length of stay exceeding 6 days (OR, 1.42) had a greater risk of 30-day readmission. The researchers observed an inverse association for patients aged 45 years or older and for those in high-income households. “Greater attention to high-risk subgroups may identify opportunities to ameliorate the clinical and economic burden of early readmissions after generalized convulsive status epilepticus,” said the researchers.
The researchers had no disclosures.
SOURCE: Rahwan M et al. AAN 2019, Abstract S36.006.
PHILADELPHIA – according to research presented at the annual meeting of the American Academy of Neurology. It is possible to identify patients at high risk of readmission, which could allow neurologists to reduce their clinical and economic burden, said the investigators.
Status epilepticus is a major neurologic emergency. Patients often have significant disability and may represent a burden on their families and on the health care system. To identify independent predictors of 30-day hospital readmission among patients discharged after generalized convulsive status epilepticus, Mohamad Rahwan, MD, a neurologist at the Medical University of South Carolina, Charleston, and colleagues examined data from the 2014 Nationwide Readmission Database.
The investigators included adults with a primary discharge diagnosis of generalized convulsive status epilepticus, identified by the ICD-9-CM code 345.3, in their study. Patients who died during hospitalization, had missing information on the length of stay, or were discharged in December 2014 were excluded from analysis. Dr. Rahwan and colleagues calculated the overall 30-day readmission rate for the sample and compared prespecified groups by their 30-day readmission status. They performed multiple logistic regression analysis to identify independent predictors of 30-day readmission, adjusting for potential confounders.
In all, 14,562 adults were discharged with a diagnosis of generalized convulsive status epilepticus. Of this population, 2,520 patients (17.3%) were readmitted within 30 days. Multivariate logistic regression analysis indicated that patients discharged against medical advice (odds ratio, 1.45), those discharged to short-term hospital (OR, 1.39), those with comorbid conditions (OR for Charlson Comorbidity Index of 1, 1.12; OR for Charlson Comorbidity Index of 2 or greater, 1.32), and those with a length of stay exceeding 6 days (OR, 1.42) had a greater risk of 30-day readmission. The researchers observed an inverse association for patients aged 45 years or older and for those in high-income households. “Greater attention to high-risk subgroups may identify opportunities to ameliorate the clinical and economic burden of early readmissions after generalized convulsive status epilepticus,” said the researchers.
The researchers had no disclosures.
SOURCE: Rahwan M et al. AAN 2019, Abstract S36.006.
REPORTING FROM AAN 2019