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Living-donor liver transplants linked with substantial survival benefit
Living-donor liver transplant recipients gained an additional 13-17 years of life, compared with patients who remained on the wait list, according to a retrospective case-control study.
The data suggest that the life-years gained are comparable to or greater than those conferred by either other lifesaving procedures or liver transplant from a deceased donor, wrote the researchers, led by Whitney Jackson, MD, assistant professor of gastroenterology and medical director of living-donor liver transplantation at the University of Colorado Anschutz Medical Campus.
“Despite the acceptance of living-donor liver transplant as a lifesaving procedure for end-stage liver disease, it remains underused in the United States,” the authors wrote in JAMA Surgery. “This study’s findings challenge current perceptions regarding when the survival benefit of a living-donor transplant occurs.”
Dr. Jackson and colleagues conducted a retrospective, secondary analysis of the Scientific Registry of Transplant Recipients database for 119,275 U.S. liver transplant candidates and recipients from January 2012 to September 2021. They assessed the survival benefit, life-years saved, and the Model for End-Stage Liver Disease incorporating sodium levels (MELD-Na) score at which the survival benefit was obtained, compared with those who remained on the wait list.
The research team included 116,455 liver transplant candidates who were 18 and older and assigned to the wait list, as well as 2,820 patients who received a living-donor liver transplant. Patients listed for retransplant or multiorgan transplant were excluded, as were those with prior kidney or liver transplants.
The mean age of the study participants was 55 years, and 63% were men. Overall, 70.2% were White, 15.8% were Hispanic or Latinx, 8.2% were Black or African American, 4.3% were Asian, 0.9% were American Indian or Alaska Native, and 0.2% were Native Hawaiian or Pacific Islander. The most common etiologies were alcoholic cirrhosis (23.8%) and nonalcoholic steatohepatitis (15.9%).
Compared with patients on the wait list, recipients of a living-donor liver transplant were younger, more often women, more educated, and more often White. A greater proportion of transplant recipients had a primary etiology of nonalcoholic steatohepatitis (19.8%) and cholestatic liver disease (24.1%). At wait list placement, one-third of candidates had a MELD-Na score of 14 or higher.
The research team found a significant survival benefit for patients receiving a living-donor liver transplant based on mortality risk and survival scores. The survival benefit was significant at a MELD-Na score as low as 11, with a 34% decrease(95% confidence interval [CI], 17.4%-52.0%) in mortality compared with the wait list. In addition, mortality risk models confirmed a survival benefit for patients with a MELD-Na score of 11 or higher at 1 year after transplant (adjusted hazard ratio, 0.64; 95% CI, 0.47-0.88; P = .006). At a MELD-Na score of 14-16, mortality decreased by about 50% (aHR, 0.47; 95% CI, 0.34-0.66; P < .001).
The probability of death from a living-donor liver transplant for patients with very low MELD-Na scores (between 6 and 10) was greater than that for patients on the wait list for the first 259 days, at which point the risk of death for both groups was equal. At 471 days, the probability of survival in both groups was equal. As the MELD-Na score increased, both the time to equal risk of death and the time to equal survival decreased, demonstrating that the survival benefit occurs much earlier for patients with a higher MELD-Na score.
Analysis of life-years from transplant showed living-donor transplant recipients gained 13-17 life-years compared to those who didn’t receive one.
“Living-donor liver transplantation is a valuable yet underutilized strategy to address the significant organ shortage and long waiting times on the transplant list in the U.S.,” said Renu Dhanasekaran, MD, PhD, assistant professor of gastroenterology and hepatology at Stanford (Calif.) University.
Dr. Dhanasekaran, who wasn’t involved with this study, also welcomed the finding that living-donor liver transplantation can benefit patients with low MELD-Na scores, even below the expected cutoff at 15. According to the study authors, previous research had suggested benefit would be seen only at MELD-Na 15 and above.
“In my practice, I have several patients whose symptoms are out of proportion to their MELD score, and data like this will convince them and their potential donors to avail a transplant at an earlier stage,” she said.
The findings challenge the current paradigm around the timing of referral for a liver transplant and may have ramifications for allocation policies for deceased donors, the study authors wrote. The data can also help to contextualize risk-benefit discussions for donors and recipients.
“Donating a part of one’s liver to save a patient suffering from end-stage liver disease is an incredible act of selfless love,” Dr. Dhanasekaran said. “I hope strong positive data from studies like this one encourage more donors, patients, and transplant centers to expand the use of [living-donor liver transplant].”
The authors reported no grant support or funding sources for this study. One author disclosed being married to the current chair of the United Network for Organ Sharing’s Liver and Intestinal Organ Transplantation Committee. No other conflicts of interest were reported. Dr. Dhanasekaran reported no relevant disclosures.
Living-donor liver transplant recipients gained an additional 13-17 years of life, compared with patients who remained on the wait list, according to a retrospective case-control study.
The data suggest that the life-years gained are comparable to or greater than those conferred by either other lifesaving procedures or liver transplant from a deceased donor, wrote the researchers, led by Whitney Jackson, MD, assistant professor of gastroenterology and medical director of living-donor liver transplantation at the University of Colorado Anschutz Medical Campus.
“Despite the acceptance of living-donor liver transplant as a lifesaving procedure for end-stage liver disease, it remains underused in the United States,” the authors wrote in JAMA Surgery. “This study’s findings challenge current perceptions regarding when the survival benefit of a living-donor transplant occurs.”
Dr. Jackson and colleagues conducted a retrospective, secondary analysis of the Scientific Registry of Transplant Recipients database for 119,275 U.S. liver transplant candidates and recipients from January 2012 to September 2021. They assessed the survival benefit, life-years saved, and the Model for End-Stage Liver Disease incorporating sodium levels (MELD-Na) score at which the survival benefit was obtained, compared with those who remained on the wait list.
The research team included 116,455 liver transplant candidates who were 18 and older and assigned to the wait list, as well as 2,820 patients who received a living-donor liver transplant. Patients listed for retransplant or multiorgan transplant were excluded, as were those with prior kidney or liver transplants.
The mean age of the study participants was 55 years, and 63% were men. Overall, 70.2% were White, 15.8% were Hispanic or Latinx, 8.2% were Black or African American, 4.3% were Asian, 0.9% were American Indian or Alaska Native, and 0.2% were Native Hawaiian or Pacific Islander. The most common etiologies were alcoholic cirrhosis (23.8%) and nonalcoholic steatohepatitis (15.9%).
Compared with patients on the wait list, recipients of a living-donor liver transplant were younger, more often women, more educated, and more often White. A greater proportion of transplant recipients had a primary etiology of nonalcoholic steatohepatitis (19.8%) and cholestatic liver disease (24.1%). At wait list placement, one-third of candidates had a MELD-Na score of 14 or higher.
The research team found a significant survival benefit for patients receiving a living-donor liver transplant based on mortality risk and survival scores. The survival benefit was significant at a MELD-Na score as low as 11, with a 34% decrease(95% confidence interval [CI], 17.4%-52.0%) in mortality compared with the wait list. In addition, mortality risk models confirmed a survival benefit for patients with a MELD-Na score of 11 or higher at 1 year after transplant (adjusted hazard ratio, 0.64; 95% CI, 0.47-0.88; P = .006). At a MELD-Na score of 14-16, mortality decreased by about 50% (aHR, 0.47; 95% CI, 0.34-0.66; P < .001).
The probability of death from a living-donor liver transplant for patients with very low MELD-Na scores (between 6 and 10) was greater than that for patients on the wait list for the first 259 days, at which point the risk of death for both groups was equal. At 471 days, the probability of survival in both groups was equal. As the MELD-Na score increased, both the time to equal risk of death and the time to equal survival decreased, demonstrating that the survival benefit occurs much earlier for patients with a higher MELD-Na score.
Analysis of life-years from transplant showed living-donor transplant recipients gained 13-17 life-years compared to those who didn’t receive one.
“Living-donor liver transplantation is a valuable yet underutilized strategy to address the significant organ shortage and long waiting times on the transplant list in the U.S.,” said Renu Dhanasekaran, MD, PhD, assistant professor of gastroenterology and hepatology at Stanford (Calif.) University.
Dr. Dhanasekaran, who wasn’t involved with this study, also welcomed the finding that living-donor liver transplantation can benefit patients with low MELD-Na scores, even below the expected cutoff at 15. According to the study authors, previous research had suggested benefit would be seen only at MELD-Na 15 and above.
“In my practice, I have several patients whose symptoms are out of proportion to their MELD score, and data like this will convince them and their potential donors to avail a transplant at an earlier stage,” she said.
The findings challenge the current paradigm around the timing of referral for a liver transplant and may have ramifications for allocation policies for deceased donors, the study authors wrote. The data can also help to contextualize risk-benefit discussions for donors and recipients.
“Donating a part of one’s liver to save a patient suffering from end-stage liver disease is an incredible act of selfless love,” Dr. Dhanasekaran said. “I hope strong positive data from studies like this one encourage more donors, patients, and transplant centers to expand the use of [living-donor liver transplant].”
The authors reported no grant support or funding sources for this study. One author disclosed being married to the current chair of the United Network for Organ Sharing’s Liver and Intestinal Organ Transplantation Committee. No other conflicts of interest were reported. Dr. Dhanasekaran reported no relevant disclosures.
Living-donor liver transplant recipients gained an additional 13-17 years of life, compared with patients who remained on the wait list, according to a retrospective case-control study.
The data suggest that the life-years gained are comparable to or greater than those conferred by either other lifesaving procedures or liver transplant from a deceased donor, wrote the researchers, led by Whitney Jackson, MD, assistant professor of gastroenterology and medical director of living-donor liver transplantation at the University of Colorado Anschutz Medical Campus.
“Despite the acceptance of living-donor liver transplant as a lifesaving procedure for end-stage liver disease, it remains underused in the United States,” the authors wrote in JAMA Surgery. “This study’s findings challenge current perceptions regarding when the survival benefit of a living-donor transplant occurs.”
Dr. Jackson and colleagues conducted a retrospective, secondary analysis of the Scientific Registry of Transplant Recipients database for 119,275 U.S. liver transplant candidates and recipients from January 2012 to September 2021. They assessed the survival benefit, life-years saved, and the Model for End-Stage Liver Disease incorporating sodium levels (MELD-Na) score at which the survival benefit was obtained, compared with those who remained on the wait list.
The research team included 116,455 liver transplant candidates who were 18 and older and assigned to the wait list, as well as 2,820 patients who received a living-donor liver transplant. Patients listed for retransplant or multiorgan transplant were excluded, as were those with prior kidney or liver transplants.
The mean age of the study participants was 55 years, and 63% were men. Overall, 70.2% were White, 15.8% were Hispanic or Latinx, 8.2% were Black or African American, 4.3% were Asian, 0.9% were American Indian or Alaska Native, and 0.2% were Native Hawaiian or Pacific Islander. The most common etiologies were alcoholic cirrhosis (23.8%) and nonalcoholic steatohepatitis (15.9%).
Compared with patients on the wait list, recipients of a living-donor liver transplant were younger, more often women, more educated, and more often White. A greater proportion of transplant recipients had a primary etiology of nonalcoholic steatohepatitis (19.8%) and cholestatic liver disease (24.1%). At wait list placement, one-third of candidates had a MELD-Na score of 14 or higher.
The research team found a significant survival benefit for patients receiving a living-donor liver transplant based on mortality risk and survival scores. The survival benefit was significant at a MELD-Na score as low as 11, with a 34% decrease(95% confidence interval [CI], 17.4%-52.0%) in mortality compared with the wait list. In addition, mortality risk models confirmed a survival benefit for patients with a MELD-Na score of 11 or higher at 1 year after transplant (adjusted hazard ratio, 0.64; 95% CI, 0.47-0.88; P = .006). At a MELD-Na score of 14-16, mortality decreased by about 50% (aHR, 0.47; 95% CI, 0.34-0.66; P < .001).
The probability of death from a living-donor liver transplant for patients with very low MELD-Na scores (between 6 and 10) was greater than that for patients on the wait list for the first 259 days, at which point the risk of death for both groups was equal. At 471 days, the probability of survival in both groups was equal. As the MELD-Na score increased, both the time to equal risk of death and the time to equal survival decreased, demonstrating that the survival benefit occurs much earlier for patients with a higher MELD-Na score.
Analysis of life-years from transplant showed living-donor transplant recipients gained 13-17 life-years compared to those who didn’t receive one.
“Living-donor liver transplantation is a valuable yet underutilized strategy to address the significant organ shortage and long waiting times on the transplant list in the U.S.,” said Renu Dhanasekaran, MD, PhD, assistant professor of gastroenterology and hepatology at Stanford (Calif.) University.
Dr. Dhanasekaran, who wasn’t involved with this study, also welcomed the finding that living-donor liver transplantation can benefit patients with low MELD-Na scores, even below the expected cutoff at 15. According to the study authors, previous research had suggested benefit would be seen only at MELD-Na 15 and above.
“In my practice, I have several patients whose symptoms are out of proportion to their MELD score, and data like this will convince them and their potential donors to avail a transplant at an earlier stage,” she said.
The findings challenge the current paradigm around the timing of referral for a liver transplant and may have ramifications for allocation policies for deceased donors, the study authors wrote. The data can also help to contextualize risk-benefit discussions for donors and recipients.
“Donating a part of one’s liver to save a patient suffering from end-stage liver disease is an incredible act of selfless love,” Dr. Dhanasekaran said. “I hope strong positive data from studies like this one encourage more donors, patients, and transplant centers to expand the use of [living-donor liver transplant].”
The authors reported no grant support or funding sources for this study. One author disclosed being married to the current chair of the United Network for Organ Sharing’s Liver and Intestinal Organ Transplantation Committee. No other conflicts of interest were reported. Dr. Dhanasekaran reported no relevant disclosures.
FROM JAMA SURGERY
Then and now: Liver disease
In the late 2000s, we witnessed revolutionary discoveries and advances in our understanding and management of chronic hepatitis C. Who knew that when IL-28B was first described in 2009, providing a genetic basis for patients’ response to interferon-based therapies, its impact would also be so swiftly supplanted by the introduction of direct acting antivirals a few years later? The pipeline for HCV treatment was feverish for several years, which resulted in a complete transformation of HCV treatment from a long, exhausting, side-effect filled course to a simple 8-to-12-week regimen. Furthermore, we now have established protocols for organ transplantation for patients without active HCV infection to receive HCV-positive organs due to the effectiveness of treatments for HCV. This kind of progress in our field demonstrates how awe-inspiring medical advances can be and how fortunate we are to have witnessed and lived this progress in such a short period of time.
In recent years, non-alcoholic fatty liver disease (NAFLD) has supplanted HCV as the most prevalent chronic liver disease seen in GI and hepatology practices across the country.
The sheer number of these patients can be overwhelming for any practice, whether a GI practice or primary care. It has become clear that we have an urgent need for improved and easily accessible non-invasive methods to risk stratify NAFLD to identify patients at most risk for developing advanced fibrosis, decompensated cirrhosis, and hepatocellular carcinoma. Furthermore, effective strategies for prevention of these adverse outcomes in the general population still need to be further characterized. For treatment of non-alcoholic steatohepatitis, therapeutic agents being studied for their efficacy are wide ranging with particular interest in weight loss medications, diabetic medications, and anti-inflammatory medications. Yet, we can all see that there are sizeable gaps in our understanding and management of patients with NAFLD. However, rather than being intimidated, we should look forward to the progress that will surely come in the next 15 years.
Dr. Jou is associate professor of medicine, division of gastroenterology and hepatology, School of Medicine Fellowship program director, Medicine, Division of Gastroenterology and Hepatology, School of Medicine, Oregon Health and Science University, Portland. She reported no relevant financial conflicts of interest.
In the late 2000s, we witnessed revolutionary discoveries and advances in our understanding and management of chronic hepatitis C. Who knew that when IL-28B was first described in 2009, providing a genetic basis for patients’ response to interferon-based therapies, its impact would also be so swiftly supplanted by the introduction of direct acting antivirals a few years later? The pipeline for HCV treatment was feverish for several years, which resulted in a complete transformation of HCV treatment from a long, exhausting, side-effect filled course to a simple 8-to-12-week regimen. Furthermore, we now have established protocols for organ transplantation for patients without active HCV infection to receive HCV-positive organs due to the effectiveness of treatments for HCV. This kind of progress in our field demonstrates how awe-inspiring medical advances can be and how fortunate we are to have witnessed and lived this progress in such a short period of time.
In recent years, non-alcoholic fatty liver disease (NAFLD) has supplanted HCV as the most prevalent chronic liver disease seen in GI and hepatology practices across the country.
The sheer number of these patients can be overwhelming for any practice, whether a GI practice or primary care. It has become clear that we have an urgent need for improved and easily accessible non-invasive methods to risk stratify NAFLD to identify patients at most risk for developing advanced fibrosis, decompensated cirrhosis, and hepatocellular carcinoma. Furthermore, effective strategies for prevention of these adverse outcomes in the general population still need to be further characterized. For treatment of non-alcoholic steatohepatitis, therapeutic agents being studied for their efficacy are wide ranging with particular interest in weight loss medications, diabetic medications, and anti-inflammatory medications. Yet, we can all see that there are sizeable gaps in our understanding and management of patients with NAFLD. However, rather than being intimidated, we should look forward to the progress that will surely come in the next 15 years.
Dr. Jou is associate professor of medicine, division of gastroenterology and hepatology, School of Medicine Fellowship program director, Medicine, Division of Gastroenterology and Hepatology, School of Medicine, Oregon Health and Science University, Portland. She reported no relevant financial conflicts of interest.
In the late 2000s, we witnessed revolutionary discoveries and advances in our understanding and management of chronic hepatitis C. Who knew that when IL-28B was first described in 2009, providing a genetic basis for patients’ response to interferon-based therapies, its impact would also be so swiftly supplanted by the introduction of direct acting antivirals a few years later? The pipeline for HCV treatment was feverish for several years, which resulted in a complete transformation of HCV treatment from a long, exhausting, side-effect filled course to a simple 8-to-12-week regimen. Furthermore, we now have established protocols for organ transplantation for patients without active HCV infection to receive HCV-positive organs due to the effectiveness of treatments for HCV. This kind of progress in our field demonstrates how awe-inspiring medical advances can be and how fortunate we are to have witnessed and lived this progress in such a short period of time.
In recent years, non-alcoholic fatty liver disease (NAFLD) has supplanted HCV as the most prevalent chronic liver disease seen in GI and hepatology practices across the country.
The sheer number of these patients can be overwhelming for any practice, whether a GI practice or primary care. It has become clear that we have an urgent need for improved and easily accessible non-invasive methods to risk stratify NAFLD to identify patients at most risk for developing advanced fibrosis, decompensated cirrhosis, and hepatocellular carcinoma. Furthermore, effective strategies for prevention of these adverse outcomes in the general population still need to be further characterized. For treatment of non-alcoholic steatohepatitis, therapeutic agents being studied for their efficacy are wide ranging with particular interest in weight loss medications, diabetic medications, and anti-inflammatory medications. Yet, we can all see that there are sizeable gaps in our understanding and management of patients with NAFLD. However, rather than being intimidated, we should look forward to the progress that will surely come in the next 15 years.
Dr. Jou is associate professor of medicine, division of gastroenterology and hepatology, School of Medicine Fellowship program director, Medicine, Division of Gastroenterology and Hepatology, School of Medicine, Oregon Health and Science University, Portland. She reported no relevant financial conflicts of interest.
Fewer GI docs, more alcohol-associated liver disease deaths
People are more likely to die of alcohol-associated liver disease (ALD) when there are fewer gastroenterologists in their state, researchers say.
The finding raises questions about steps that policymakers could take to increase the number of gastroenterologists and spread them more evenly around the United States.
“We found that there’s a fivefold difference in density of gastroenterologists through different states,” said Brian P. Lee, MD, MAS, an assistant professor of clinical medicine at the University of Southern California, Los Angeles.
Dr. Lee and colleagues published their findings in Clinical Gastroenterology and Hepatology.
ALD is becoming more common, and it is killing more people. Research among veterans has linked visits to gastroenterologists to a lower risk for death from liver disease.
To see whether that correlation applies more broadly, Dr. Lee and colleagues compared multiple datasets. One from the U.S. Health Resources & Service Administration provided the number of gastroenterologists per 100,000 population. The other from the U.S. Centers for Disease Control and Prevention provided ALD-related deaths per 1,000,000 adults for each state and the District of Columbia.
The researchers adjusted for many variables that could affect the relationship between the availability of gastroenterologists and deaths related to ALD, including the age distribution of the population in each state, the gender balance, race and ethnicity, binge drinking, household income, obesity, and the proportion of rural residents.
They found that for every additional gastroenterologist, there is almost one fewer ALD-related death each year per 100,000 population (9.0 [95% confidence interval, 1.3-16.7] fewer ALD-related deaths per 1,000,000 population for each additional gastroenterologist per 100,000 population).
The strength of the association appeared to plateau when there were at least 7.5 gastroenterologists per 100,000 people.
From these findings, the researchers calculated that as many as 40% of deaths from ALD nationwide could be prevented by providing more gastroenterologists in the places where they are lacking.
The mean number of gastroenterologists per 100,000 people in the United States was 4.6, and the annual ALD-related death rate was 85.6 per 1,000,000 people.
The Atlantic states had the greatest concentration of gastroenterologists and the lowest ALD-related mortality, whereas the Mountain states had the lowest concentration of gastroenterologists and the highest ALD-related mortality.
The lowest mortality related to ALD was in New Jersey, Maryland, and Hawaii, with 52 per 1,000,000 people, and the highest was in Wyoming, with 289.
Study shines spotlight on general GI care
Access to liver transplants did not make a statistically significant difference in mortality from ALD.
“It makes you realize that transplant will only be accessible for really just a small fraction of the population who needs it,” Dr. Lee told this news organization.
General gastroenterologic care appears to make a bigger difference in saving patients’ lives. “Are they getting endoscopy for bleeding from varices?” Dr. Lee asked. “Are they getting appropriate antibiotics prescribed to prevent bacterial infection of ascites?”
The concentration of primary care physicians did not reduce mortality from ALD, and neither did the concentration of substance use, behavioral disorder, and mental health counselors.
Previous research has shown that substance abuse therapy is effective. But many people do not want to undertake it, or they face barriers of transportation, language, or insurance, said Dr. Lee.
“I have many patients whose insurance will provide them access to medical visits to me but will not to substance-use rehab, for example,” he said.
To see whether the effect was more generally due to the concentration of medical specialists, the researchers examined the state-level density of ophthalmologists and dermatologists. They found no significant difference in ALD-related mortality.
The finding builds on reports by the American Gastroenterological Association and the American Association for the Study of Liver Diseases that the number of gastroenterologists has not kept up with the U.S. population nor the burden of digestive diseases, and that predicts a critical shortage in the future.
Overcoming barriers to care for liver disease
The overall supply of gastroenterologists could be increased by reducing the educational requirements and increasing the funding for fellowships, said Dr. Lee.
“We have to have a better understanding as to the barriers to gastroenterology practice in certain areas, then interventions to address those barriers and also incentives to attract gastroenterologists to those areas,” Dr. Lee said.
The study underscores the importance of access to gastroenterological care, said George Cholankeril, MD, assistant professor of medicine at Baylor College of Medicine, Houston, who was not involved in the study. That urgency has only grown as ALD has spiraled up with the COVID-19 pandemic, he said.
“Anyone in clinical practice right now will be able to say that there’s been a clear rising tide of patients with alcohol-related liver disease,” he told this news organization. “There’s an urgent need to address this and provide the necessary resources.”
Prevention remains essential, Dr. Cholankeril said.
Gastroenterologists and primary care physicians can help stem the tide of ALD by screening their patients for the disease through a tool like AUDIT (Alcohol Use Disorders Identification Test), he said. They can then refer patients to substance abuse treatment centers or to psychologists and psychiatrists.
Dr. Lee and Dr. Cholankeril report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
People are more likely to die of alcohol-associated liver disease (ALD) when there are fewer gastroenterologists in their state, researchers say.
The finding raises questions about steps that policymakers could take to increase the number of gastroenterologists and spread them more evenly around the United States.
“We found that there’s a fivefold difference in density of gastroenterologists through different states,” said Brian P. Lee, MD, MAS, an assistant professor of clinical medicine at the University of Southern California, Los Angeles.
Dr. Lee and colleagues published their findings in Clinical Gastroenterology and Hepatology.
ALD is becoming more common, and it is killing more people. Research among veterans has linked visits to gastroenterologists to a lower risk for death from liver disease.
To see whether that correlation applies more broadly, Dr. Lee and colleagues compared multiple datasets. One from the U.S. Health Resources & Service Administration provided the number of gastroenterologists per 100,000 population. The other from the U.S. Centers for Disease Control and Prevention provided ALD-related deaths per 1,000,000 adults for each state and the District of Columbia.
The researchers adjusted for many variables that could affect the relationship between the availability of gastroenterologists and deaths related to ALD, including the age distribution of the population in each state, the gender balance, race and ethnicity, binge drinking, household income, obesity, and the proportion of rural residents.
They found that for every additional gastroenterologist, there is almost one fewer ALD-related death each year per 100,000 population (9.0 [95% confidence interval, 1.3-16.7] fewer ALD-related deaths per 1,000,000 population for each additional gastroenterologist per 100,000 population).
The strength of the association appeared to plateau when there were at least 7.5 gastroenterologists per 100,000 people.
From these findings, the researchers calculated that as many as 40% of deaths from ALD nationwide could be prevented by providing more gastroenterologists in the places where they are lacking.
The mean number of gastroenterologists per 100,000 people in the United States was 4.6, and the annual ALD-related death rate was 85.6 per 1,000,000 people.
The Atlantic states had the greatest concentration of gastroenterologists and the lowest ALD-related mortality, whereas the Mountain states had the lowest concentration of gastroenterologists and the highest ALD-related mortality.
The lowest mortality related to ALD was in New Jersey, Maryland, and Hawaii, with 52 per 1,000,000 people, and the highest was in Wyoming, with 289.
Study shines spotlight on general GI care
Access to liver transplants did not make a statistically significant difference in mortality from ALD.
“It makes you realize that transplant will only be accessible for really just a small fraction of the population who needs it,” Dr. Lee told this news organization.
General gastroenterologic care appears to make a bigger difference in saving patients’ lives. “Are they getting endoscopy for bleeding from varices?” Dr. Lee asked. “Are they getting appropriate antibiotics prescribed to prevent bacterial infection of ascites?”
The concentration of primary care physicians did not reduce mortality from ALD, and neither did the concentration of substance use, behavioral disorder, and mental health counselors.
Previous research has shown that substance abuse therapy is effective. But many people do not want to undertake it, or they face barriers of transportation, language, or insurance, said Dr. Lee.
“I have many patients whose insurance will provide them access to medical visits to me but will not to substance-use rehab, for example,” he said.
To see whether the effect was more generally due to the concentration of medical specialists, the researchers examined the state-level density of ophthalmologists and dermatologists. They found no significant difference in ALD-related mortality.
The finding builds on reports by the American Gastroenterological Association and the American Association for the Study of Liver Diseases that the number of gastroenterologists has not kept up with the U.S. population nor the burden of digestive diseases, and that predicts a critical shortage in the future.
Overcoming barriers to care for liver disease
The overall supply of gastroenterologists could be increased by reducing the educational requirements and increasing the funding for fellowships, said Dr. Lee.
“We have to have a better understanding as to the barriers to gastroenterology practice in certain areas, then interventions to address those barriers and also incentives to attract gastroenterologists to those areas,” Dr. Lee said.
The study underscores the importance of access to gastroenterological care, said George Cholankeril, MD, assistant professor of medicine at Baylor College of Medicine, Houston, who was not involved in the study. That urgency has only grown as ALD has spiraled up with the COVID-19 pandemic, he said.
“Anyone in clinical practice right now will be able to say that there’s been a clear rising tide of patients with alcohol-related liver disease,” he told this news organization. “There’s an urgent need to address this and provide the necessary resources.”
Prevention remains essential, Dr. Cholankeril said.
Gastroenterologists and primary care physicians can help stem the tide of ALD by screening their patients for the disease through a tool like AUDIT (Alcohol Use Disorders Identification Test), he said. They can then refer patients to substance abuse treatment centers or to psychologists and psychiatrists.
Dr. Lee and Dr. Cholankeril report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
People are more likely to die of alcohol-associated liver disease (ALD) when there are fewer gastroenterologists in their state, researchers say.
The finding raises questions about steps that policymakers could take to increase the number of gastroenterologists and spread them more evenly around the United States.
“We found that there’s a fivefold difference in density of gastroenterologists through different states,” said Brian P. Lee, MD, MAS, an assistant professor of clinical medicine at the University of Southern California, Los Angeles.
Dr. Lee and colleagues published their findings in Clinical Gastroenterology and Hepatology.
ALD is becoming more common, and it is killing more people. Research among veterans has linked visits to gastroenterologists to a lower risk for death from liver disease.
To see whether that correlation applies more broadly, Dr. Lee and colleagues compared multiple datasets. One from the U.S. Health Resources & Service Administration provided the number of gastroenterologists per 100,000 population. The other from the U.S. Centers for Disease Control and Prevention provided ALD-related deaths per 1,000,000 adults for each state and the District of Columbia.
The researchers adjusted for many variables that could affect the relationship between the availability of gastroenterologists and deaths related to ALD, including the age distribution of the population in each state, the gender balance, race and ethnicity, binge drinking, household income, obesity, and the proportion of rural residents.
They found that for every additional gastroenterologist, there is almost one fewer ALD-related death each year per 100,000 population (9.0 [95% confidence interval, 1.3-16.7] fewer ALD-related deaths per 1,000,000 population for each additional gastroenterologist per 100,000 population).
The strength of the association appeared to plateau when there were at least 7.5 gastroenterologists per 100,000 people.
From these findings, the researchers calculated that as many as 40% of deaths from ALD nationwide could be prevented by providing more gastroenterologists in the places where they are lacking.
The mean number of gastroenterologists per 100,000 people in the United States was 4.6, and the annual ALD-related death rate was 85.6 per 1,000,000 people.
The Atlantic states had the greatest concentration of gastroenterologists and the lowest ALD-related mortality, whereas the Mountain states had the lowest concentration of gastroenterologists and the highest ALD-related mortality.
The lowest mortality related to ALD was in New Jersey, Maryland, and Hawaii, with 52 per 1,000,000 people, and the highest was in Wyoming, with 289.
Study shines spotlight on general GI care
Access to liver transplants did not make a statistically significant difference in mortality from ALD.
“It makes you realize that transplant will only be accessible for really just a small fraction of the population who needs it,” Dr. Lee told this news organization.
General gastroenterologic care appears to make a bigger difference in saving patients’ lives. “Are they getting endoscopy for bleeding from varices?” Dr. Lee asked. “Are they getting appropriate antibiotics prescribed to prevent bacterial infection of ascites?”
The concentration of primary care physicians did not reduce mortality from ALD, and neither did the concentration of substance use, behavioral disorder, and mental health counselors.
Previous research has shown that substance abuse therapy is effective. But many people do not want to undertake it, or they face barriers of transportation, language, or insurance, said Dr. Lee.
“I have many patients whose insurance will provide them access to medical visits to me but will not to substance-use rehab, for example,” he said.
To see whether the effect was more generally due to the concentration of medical specialists, the researchers examined the state-level density of ophthalmologists and dermatologists. They found no significant difference in ALD-related mortality.
The finding builds on reports by the American Gastroenterological Association and the American Association for the Study of Liver Diseases that the number of gastroenterologists has not kept up with the U.S. population nor the burden of digestive diseases, and that predicts a critical shortage in the future.
Overcoming barriers to care for liver disease
The overall supply of gastroenterologists could be increased by reducing the educational requirements and increasing the funding for fellowships, said Dr. Lee.
“We have to have a better understanding as to the barriers to gastroenterology practice in certain areas, then interventions to address those barriers and also incentives to attract gastroenterologists to those areas,” Dr. Lee said.
The study underscores the importance of access to gastroenterological care, said George Cholankeril, MD, assistant professor of medicine at Baylor College of Medicine, Houston, who was not involved in the study. That urgency has only grown as ALD has spiraled up with the COVID-19 pandemic, he said.
“Anyone in clinical practice right now will be able to say that there’s been a clear rising tide of patients with alcohol-related liver disease,” he told this news organization. “There’s an urgent need to address this and provide the necessary resources.”
Prevention remains essential, Dr. Cholankeril said.
Gastroenterologists and primary care physicians can help stem the tide of ALD by screening their patients for the disease through a tool like AUDIT (Alcohol Use Disorders Identification Test), he said. They can then refer patients to substance abuse treatment centers or to psychologists and psychiatrists.
Dr. Lee and Dr. Cholankeril report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM CLINICAL GASTROENTEROLOGY AND HEPATOLOGY
Gene variants found to protect against liver disease
Rare gene variants are associated with a reduced risk for multiple types of liver disease, including cirrhosis, researchers say.
People with certain variants in the gene CIDEB are one-third less likely to develop any sort of liver disease, according to Aris Baras, MD, a senior vice president at Regeneron, and colleagues.
“The unprecedented protective effect that these CIDEB genetic variants have against liver disease provides us with one of our most exciting targets and potential therapeutic approaches for a notoriously hard-to-treat disease where there are currently no approved treatments,” said Dr. Baras in a press release.
Dr. Baras and colleagues published the finding in The New England Journal of Medicine.
The finding follows on a similar discovery about a common variant in the gene HSD17B13. Treatments targeting this gene are being tested in clinical trials.
To search for more such genes, the researchers analyzed human exomes – the part of the genome that codes for proteins – to look for associations between gene variants and liver function.
The researchers used exome sequencing on 542,904 people from the UK Biobank, the Geisinger Health System MyCode cohort, and other datasets.
They found that coding variants in APOB, ABCB4, SLC30A10, and TM6SF2 were associated with increased aminotransferase levels and an increased risk for liver disease.
But variants in CIDEB were associated with decreased levels of alanine aminotransferase, a biomarker of hepatocellular injury. And they were associated with a decreased risk for liver disease of any cause (odds ratio per allele, 0.67; 95% confidence interval, 0.57-0.79).
The CIDEB variants were present in only 0.7% of the persons in the study.
Zeroing in on various kinds of liver disease, the researchers found that the CIDEB variants were associated with a reduced risk for alcoholic liver disease, nonalcoholic liver disease, any liver cirrhosis, alcoholic liver cirrhosis, nonalcoholic liver cirrhosis, and viral hepatitis.
In 3,599 patients who had undergone bariatric surgery, variants in CIDEB were associated with a reduced nonalcoholic fatty liver disease activity score of –0.98 beta per allele in score units, where scores range from 0-8, with a higher score indicating more severe disease.
In patients for whom MRI data were available, those with rare coding variants in CIDEB had lower proportions of liver fat. However, percentage of liver fat did not fully explain the reduced risk for liver disease.
Pursuing another line of investigation, the researchers found that they could prevent the buildup of large lipid droplets in oleic acid-treated human hepatoma cell lines by silencing the CIDEB gene using small interfering RNA.
The association was particularly strong among people with higher body mass indices and type 2 diabetes.
The associations with the rare protective CIDEB variants were consistent across ancestries, but people of non-European ancestry, who might be disproportionately affected by liver disease, were underrepresented in the database, the researchers note.
The study was supported by Regeneron Pharmaceuticals, which also employed several of the researchers.
A version of this article first appeared on Medscape.com.
Rare gene variants are associated with a reduced risk for multiple types of liver disease, including cirrhosis, researchers say.
People with certain variants in the gene CIDEB are one-third less likely to develop any sort of liver disease, according to Aris Baras, MD, a senior vice president at Regeneron, and colleagues.
“The unprecedented protective effect that these CIDEB genetic variants have against liver disease provides us with one of our most exciting targets and potential therapeutic approaches for a notoriously hard-to-treat disease where there are currently no approved treatments,” said Dr. Baras in a press release.
Dr. Baras and colleagues published the finding in The New England Journal of Medicine.
The finding follows on a similar discovery about a common variant in the gene HSD17B13. Treatments targeting this gene are being tested in clinical trials.
To search for more such genes, the researchers analyzed human exomes – the part of the genome that codes for proteins – to look for associations between gene variants and liver function.
The researchers used exome sequencing on 542,904 people from the UK Biobank, the Geisinger Health System MyCode cohort, and other datasets.
They found that coding variants in APOB, ABCB4, SLC30A10, and TM6SF2 were associated with increased aminotransferase levels and an increased risk for liver disease.
But variants in CIDEB were associated with decreased levels of alanine aminotransferase, a biomarker of hepatocellular injury. And they were associated with a decreased risk for liver disease of any cause (odds ratio per allele, 0.67; 95% confidence interval, 0.57-0.79).
The CIDEB variants were present in only 0.7% of the persons in the study.
Zeroing in on various kinds of liver disease, the researchers found that the CIDEB variants were associated with a reduced risk for alcoholic liver disease, nonalcoholic liver disease, any liver cirrhosis, alcoholic liver cirrhosis, nonalcoholic liver cirrhosis, and viral hepatitis.
In 3,599 patients who had undergone bariatric surgery, variants in CIDEB were associated with a reduced nonalcoholic fatty liver disease activity score of –0.98 beta per allele in score units, where scores range from 0-8, with a higher score indicating more severe disease.
In patients for whom MRI data were available, those with rare coding variants in CIDEB had lower proportions of liver fat. However, percentage of liver fat did not fully explain the reduced risk for liver disease.
Pursuing another line of investigation, the researchers found that they could prevent the buildup of large lipid droplets in oleic acid-treated human hepatoma cell lines by silencing the CIDEB gene using small interfering RNA.
The association was particularly strong among people with higher body mass indices and type 2 diabetes.
The associations with the rare protective CIDEB variants were consistent across ancestries, but people of non-European ancestry, who might be disproportionately affected by liver disease, were underrepresented in the database, the researchers note.
The study was supported by Regeneron Pharmaceuticals, which also employed several of the researchers.
A version of this article first appeared on Medscape.com.
Rare gene variants are associated with a reduced risk for multiple types of liver disease, including cirrhosis, researchers say.
People with certain variants in the gene CIDEB are one-third less likely to develop any sort of liver disease, according to Aris Baras, MD, a senior vice president at Regeneron, and colleagues.
“The unprecedented protective effect that these CIDEB genetic variants have against liver disease provides us with one of our most exciting targets and potential therapeutic approaches for a notoriously hard-to-treat disease where there are currently no approved treatments,” said Dr. Baras in a press release.
Dr. Baras and colleagues published the finding in The New England Journal of Medicine.
The finding follows on a similar discovery about a common variant in the gene HSD17B13. Treatments targeting this gene are being tested in clinical trials.
To search for more such genes, the researchers analyzed human exomes – the part of the genome that codes for proteins – to look for associations between gene variants and liver function.
The researchers used exome sequencing on 542,904 people from the UK Biobank, the Geisinger Health System MyCode cohort, and other datasets.
They found that coding variants in APOB, ABCB4, SLC30A10, and TM6SF2 were associated with increased aminotransferase levels and an increased risk for liver disease.
But variants in CIDEB were associated with decreased levels of alanine aminotransferase, a biomarker of hepatocellular injury. And they were associated with a decreased risk for liver disease of any cause (odds ratio per allele, 0.67; 95% confidence interval, 0.57-0.79).
The CIDEB variants were present in only 0.7% of the persons in the study.
Zeroing in on various kinds of liver disease, the researchers found that the CIDEB variants were associated with a reduced risk for alcoholic liver disease, nonalcoholic liver disease, any liver cirrhosis, alcoholic liver cirrhosis, nonalcoholic liver cirrhosis, and viral hepatitis.
In 3,599 patients who had undergone bariatric surgery, variants in CIDEB were associated with a reduced nonalcoholic fatty liver disease activity score of –0.98 beta per allele in score units, where scores range from 0-8, with a higher score indicating more severe disease.
In patients for whom MRI data were available, those with rare coding variants in CIDEB had lower proportions of liver fat. However, percentage of liver fat did not fully explain the reduced risk for liver disease.
Pursuing another line of investigation, the researchers found that they could prevent the buildup of large lipid droplets in oleic acid-treated human hepatoma cell lines by silencing the CIDEB gene using small interfering RNA.
The association was particularly strong among people with higher body mass indices and type 2 diabetes.
The associations with the rare protective CIDEB variants were consistent across ancestries, but people of non-European ancestry, who might be disproportionately affected by liver disease, were underrepresented in the database, the researchers note.
The study was supported by Regeneron Pharmaceuticals, which also employed several of the researchers.
A version of this article first appeared on Medscape.com.
FROM THE NEW ENGLAND JOURNAL OF MEDICINE
Neighborhood factors contribute to liver cancer disparities in Texas
Factors operating at the community level may help explain disparities in rates of hepatocellular carcinoma (HCC) across Texas.
Researchers found that the risk for HCC is higher in neighborhoods characterized by minority populations, socioeconomic disadvantage, and blue-collar workers from specific industries.
However, these relationships are not uniform across the state, report researchers from Baylor College of Medicine, Houston.
“HCC is a serious health concern in Texas, and our foundational work is a step forward to better prevent this deadly disease,” study investigator Hashem El-Serag, MD, PhD, said in a news release.
The study was published online in Clinical Gastroenterology and Hepatology.
HCC is the most common type of liver cancer in the United States, and Texas has the highest rate of HCC. Yet, within Texas, incidence rates vary by race, ethnicity, and geographic location.
The Baylor team examined these disparities at the neighborhood level, with a focus on measures of social determinants of health and the industries where most neighborhood residents work.
They identified 11,547 Texas residents diagnosed with HCC between 2011 and 2015, at a mean age of 63 years. Roughly three-quarters were men, and 44% were non-Hispanic White, 14% non-Hispanic Black, 37% Hispanic, and 5% other.
The researchers used demographics, socioeconomic status, and employment provided by the U.S. Census Bureau to characterize the neighborhoods where these people lived when they were diagnosed with HCC.
Among their key findings, the risk for HCC among African American and Hispanic residents was highest in West Texas, South Texas, and the panhandle. However, some factors, like age and socioeconomic status, were not affected by location.
Across the entire state, however, people older than 60 years and those of low socioeconomic status had a higher relative risk for HCC.
Two areas of employment – construction and service occupations – also stood out as being associated with a higher risk for HCC, whereas employment in agriculture was associated with lower risk.
The authors caution that the ecological nature of the study precludes any firm conclusions regarding a causal link between working in these industries and HCC.
“Further research, including longitudinal studies, [is] needed to clarify the roles of specific occupations in HCC risk,” corresponding author Abiodun Oluyomi, PhD, said in the news release.
“Our findings validate factors previously associated with HCC, and our geographic analysis shows areas of Texas where specific intervention strategies may be most relevant,” Dr. Oluyomi added.
This research was supported by the Cancer Prevention & Research Institute of Texas. The authors have no relevant disclosures.
A version of this article first appeared on Medscape.com.
Factors operating at the community level may help explain disparities in rates of hepatocellular carcinoma (HCC) across Texas.
Researchers found that the risk for HCC is higher in neighborhoods characterized by minority populations, socioeconomic disadvantage, and blue-collar workers from specific industries.
However, these relationships are not uniform across the state, report researchers from Baylor College of Medicine, Houston.
“HCC is a serious health concern in Texas, and our foundational work is a step forward to better prevent this deadly disease,” study investigator Hashem El-Serag, MD, PhD, said in a news release.
The study was published online in Clinical Gastroenterology and Hepatology.
HCC is the most common type of liver cancer in the United States, and Texas has the highest rate of HCC. Yet, within Texas, incidence rates vary by race, ethnicity, and geographic location.
The Baylor team examined these disparities at the neighborhood level, with a focus on measures of social determinants of health and the industries where most neighborhood residents work.
They identified 11,547 Texas residents diagnosed with HCC between 2011 and 2015, at a mean age of 63 years. Roughly three-quarters were men, and 44% were non-Hispanic White, 14% non-Hispanic Black, 37% Hispanic, and 5% other.
The researchers used demographics, socioeconomic status, and employment provided by the U.S. Census Bureau to characterize the neighborhoods where these people lived when they were diagnosed with HCC.
Among their key findings, the risk for HCC among African American and Hispanic residents was highest in West Texas, South Texas, and the panhandle. However, some factors, like age and socioeconomic status, were not affected by location.
Across the entire state, however, people older than 60 years and those of low socioeconomic status had a higher relative risk for HCC.
Two areas of employment – construction and service occupations – also stood out as being associated with a higher risk for HCC, whereas employment in agriculture was associated with lower risk.
The authors caution that the ecological nature of the study precludes any firm conclusions regarding a causal link between working in these industries and HCC.
“Further research, including longitudinal studies, [is] needed to clarify the roles of specific occupations in HCC risk,” corresponding author Abiodun Oluyomi, PhD, said in the news release.
“Our findings validate factors previously associated with HCC, and our geographic analysis shows areas of Texas where specific intervention strategies may be most relevant,” Dr. Oluyomi added.
This research was supported by the Cancer Prevention & Research Institute of Texas. The authors have no relevant disclosures.
A version of this article first appeared on Medscape.com.
Factors operating at the community level may help explain disparities in rates of hepatocellular carcinoma (HCC) across Texas.
Researchers found that the risk for HCC is higher in neighborhoods characterized by minority populations, socioeconomic disadvantage, and blue-collar workers from specific industries.
However, these relationships are not uniform across the state, report researchers from Baylor College of Medicine, Houston.
“HCC is a serious health concern in Texas, and our foundational work is a step forward to better prevent this deadly disease,” study investigator Hashem El-Serag, MD, PhD, said in a news release.
The study was published online in Clinical Gastroenterology and Hepatology.
HCC is the most common type of liver cancer in the United States, and Texas has the highest rate of HCC. Yet, within Texas, incidence rates vary by race, ethnicity, and geographic location.
The Baylor team examined these disparities at the neighborhood level, with a focus on measures of social determinants of health and the industries where most neighborhood residents work.
They identified 11,547 Texas residents diagnosed with HCC between 2011 and 2015, at a mean age of 63 years. Roughly three-quarters were men, and 44% were non-Hispanic White, 14% non-Hispanic Black, 37% Hispanic, and 5% other.
The researchers used demographics, socioeconomic status, and employment provided by the U.S. Census Bureau to characterize the neighborhoods where these people lived when they were diagnosed with HCC.
Among their key findings, the risk for HCC among African American and Hispanic residents was highest in West Texas, South Texas, and the panhandle. However, some factors, like age and socioeconomic status, were not affected by location.
Across the entire state, however, people older than 60 years and those of low socioeconomic status had a higher relative risk for HCC.
Two areas of employment – construction and service occupations – also stood out as being associated with a higher risk for HCC, whereas employment in agriculture was associated with lower risk.
The authors caution that the ecological nature of the study precludes any firm conclusions regarding a causal link between working in these industries and HCC.
“Further research, including longitudinal studies, [is] needed to clarify the roles of specific occupations in HCC risk,” corresponding author Abiodun Oluyomi, PhD, said in the news release.
“Our findings validate factors previously associated with HCC, and our geographic analysis shows areas of Texas where specific intervention strategies may be most relevant,” Dr. Oluyomi added.
This research was supported by the Cancer Prevention & Research Institute of Texas. The authors have no relevant disclosures.
A version of this article first appeared on Medscape.com.
FROM CLINICAL GASTROENTEROLOGY AND HEPATOLOGY
Degree of PPG reduction linked with ascites control after TIPS
A reduction in portal hepatic pressure gradient (PPG) soon after implantation of a transjugular intrahepatic portosystemic shunt (TIPS) greater than 60% was associated with improved ascites control at 6 weeks in a study published in Hepatology.
“The probability of ascites resolution is much higher if PPG reduction exceeded 60% of PPG before TIPS,” wrote the researchers, led by co–first authors Alexander Queck, MD, a postdoctoral researcher in the department of internal medicine at University Hospital Frankfurt (Germany) and Goethe University Frankfurt, and Louise Schwierz, MD, of the department of internal medicine in the University Hospital Bonn (Germany). “This study suggests that, even in patients with uncomplicated TIPS insertion, a short-term follow-up 6 weeks after TIPS should be scheduled to be able to predict their course of disease.”
The authors investigated the decrease of PPG in a single-center, retrospective analysis of 341 patients with liver cirrhosis undergoing TIPS insertion for recurrent or refractory ascites between March 1994 and July 2015. During each procedure, portal and inferior vena cava pressures were invasively measured and correlated with patients’ outcomes and ascites progression over time. In 241 patients, or 71%, chronic alcohol consumption was the reason for cirrhosis development, followed by 13% with chronic viral hepatitis (n = 43). Median survival after TIPS insertion was 102 weeks, and 19 patients received liver transplants over time.
Median portal pressure before TIPS placement was 28 mm Hg, which decreased to a median of 21 mm Hg after TIPS. Median PPG levels were 19 mm Hg before TIPS and 8 mm Hg immediately after TIPS placement.
At the time of TIPS placement, 65 patients, or 19%, had hepatic encephalopathy, and nine had severe hepatic encephalopathy. Six weeks after TIPS, two had episodes of hepatic encephalopathy.
After 6 weeks, ascites significantly improved through TIPS insertion. About 47% had a complete resolution of ascites at 6 weeks, whereas 29% had ascites detectable only by ultrasound and 24% of patients still needed large-volume paracentesis. There was an association between extent of PPG reduction and ascites resolution: Median PPG reduction was 55% of initial PPG in patients with persistence of severe ascites, 58% in patients with ascites detected by ultrasound, and 65% in patients with complete resolution of ascites at 6 weeks after TIPS.
Ascites resolved in 54% of patients with higher PPG reduction (60% or above), compared with 39% of patients with lower PPG reduction (below 60%). Ascites that was detected by ultrasound in another 27% of patients with higher PPG reduction, compared with 31% of patients with lower PPG reduction. In addition, persistent severe ascites was seen in 19% of patients with higher PPG reduction, compared with 30% of patients with lower PPG reduction.
The authors also noted the importance of timing follow-up evaluation: They noted that post-TIPS follow-up is a frequent question and not yet standardized; in this study, they found that, with follow-up at 6 weeks, they could “clearly stratify the course post TIPS” and this could “detect patients at high risk of unstable course of disease.”
PPG reduction of more than 60% after TIPS correlated with resolution of severe ascites 6 weeks after TIPS, the study authors concluded.
“This is one of the first studies that highlights the optimal goal for a portal pressure gradient in the setting of refractory ascites post TIPS procedure,” said Neeral Shah, MD, an associate professor of gastroenterology and hepatology and transplant hepatology specialist at the University of Virginia, Charlottesville.
“It is exciting to see some data from patients examining a question we have always thought to be true but have never quantified,” he said. “As a clinician who refers patients for TIPS, one of my biggest concerns is that significant shunting of blood past liver tissue through a TIPS can lead to the development of confusion.”
Dr. Shah, who wasn’t involved with the study, pointed to ongoing questions about hepatic encephalopathy around TIPS. The study authors didn’t find an issue with this among their study population, and some patients had improvements in their mental status after TIPS.
“This has not been my experience in those patients with hepatic encephalopathy at baseline pre-TIPS,” Dr. Shah said. “This point will need to be clarified further, especially if we are aiming for portal pressure gradients of 10 mm Hg or less in all patients with refractory ascites.”
The study authors declared that the research was conducted without commercial or financial relationships that could be construed as a potential conflict of interest. The authors were supported by the German Research Foundation, the German Federal Ministry of Education and Research, the European Union’s Horizon 2020 research program, and Goethe University Frankfurt. Dr. Shah reported no relevant disclosures.
A reduction in portal hepatic pressure gradient (PPG) soon after implantation of a transjugular intrahepatic portosystemic shunt (TIPS) greater than 60% was associated with improved ascites control at 6 weeks in a study published in Hepatology.
“The probability of ascites resolution is much higher if PPG reduction exceeded 60% of PPG before TIPS,” wrote the researchers, led by co–first authors Alexander Queck, MD, a postdoctoral researcher in the department of internal medicine at University Hospital Frankfurt (Germany) and Goethe University Frankfurt, and Louise Schwierz, MD, of the department of internal medicine in the University Hospital Bonn (Germany). “This study suggests that, even in patients with uncomplicated TIPS insertion, a short-term follow-up 6 weeks after TIPS should be scheduled to be able to predict their course of disease.”
The authors investigated the decrease of PPG in a single-center, retrospective analysis of 341 patients with liver cirrhosis undergoing TIPS insertion for recurrent or refractory ascites between March 1994 and July 2015. During each procedure, portal and inferior vena cava pressures were invasively measured and correlated with patients’ outcomes and ascites progression over time. In 241 patients, or 71%, chronic alcohol consumption was the reason for cirrhosis development, followed by 13% with chronic viral hepatitis (n = 43). Median survival after TIPS insertion was 102 weeks, and 19 patients received liver transplants over time.
Median portal pressure before TIPS placement was 28 mm Hg, which decreased to a median of 21 mm Hg after TIPS. Median PPG levels were 19 mm Hg before TIPS and 8 mm Hg immediately after TIPS placement.
At the time of TIPS placement, 65 patients, or 19%, had hepatic encephalopathy, and nine had severe hepatic encephalopathy. Six weeks after TIPS, two had episodes of hepatic encephalopathy.
After 6 weeks, ascites significantly improved through TIPS insertion. About 47% had a complete resolution of ascites at 6 weeks, whereas 29% had ascites detectable only by ultrasound and 24% of patients still needed large-volume paracentesis. There was an association between extent of PPG reduction and ascites resolution: Median PPG reduction was 55% of initial PPG in patients with persistence of severe ascites, 58% in patients with ascites detected by ultrasound, and 65% in patients with complete resolution of ascites at 6 weeks after TIPS.
Ascites resolved in 54% of patients with higher PPG reduction (60% or above), compared with 39% of patients with lower PPG reduction (below 60%). Ascites that was detected by ultrasound in another 27% of patients with higher PPG reduction, compared with 31% of patients with lower PPG reduction. In addition, persistent severe ascites was seen in 19% of patients with higher PPG reduction, compared with 30% of patients with lower PPG reduction.
The authors also noted the importance of timing follow-up evaluation: They noted that post-TIPS follow-up is a frequent question and not yet standardized; in this study, they found that, with follow-up at 6 weeks, they could “clearly stratify the course post TIPS” and this could “detect patients at high risk of unstable course of disease.”
PPG reduction of more than 60% after TIPS correlated with resolution of severe ascites 6 weeks after TIPS, the study authors concluded.
“This is one of the first studies that highlights the optimal goal for a portal pressure gradient in the setting of refractory ascites post TIPS procedure,” said Neeral Shah, MD, an associate professor of gastroenterology and hepatology and transplant hepatology specialist at the University of Virginia, Charlottesville.
“It is exciting to see some data from patients examining a question we have always thought to be true but have never quantified,” he said. “As a clinician who refers patients for TIPS, one of my biggest concerns is that significant shunting of blood past liver tissue through a TIPS can lead to the development of confusion.”
Dr. Shah, who wasn’t involved with the study, pointed to ongoing questions about hepatic encephalopathy around TIPS. The study authors didn’t find an issue with this among their study population, and some patients had improvements in their mental status after TIPS.
“This has not been my experience in those patients with hepatic encephalopathy at baseline pre-TIPS,” Dr. Shah said. “This point will need to be clarified further, especially if we are aiming for portal pressure gradients of 10 mm Hg or less in all patients with refractory ascites.”
The study authors declared that the research was conducted without commercial or financial relationships that could be construed as a potential conflict of interest. The authors were supported by the German Research Foundation, the German Federal Ministry of Education and Research, the European Union’s Horizon 2020 research program, and Goethe University Frankfurt. Dr. Shah reported no relevant disclosures.
A reduction in portal hepatic pressure gradient (PPG) soon after implantation of a transjugular intrahepatic portosystemic shunt (TIPS) greater than 60% was associated with improved ascites control at 6 weeks in a study published in Hepatology.
“The probability of ascites resolution is much higher if PPG reduction exceeded 60% of PPG before TIPS,” wrote the researchers, led by co–first authors Alexander Queck, MD, a postdoctoral researcher in the department of internal medicine at University Hospital Frankfurt (Germany) and Goethe University Frankfurt, and Louise Schwierz, MD, of the department of internal medicine in the University Hospital Bonn (Germany). “This study suggests that, even in patients with uncomplicated TIPS insertion, a short-term follow-up 6 weeks after TIPS should be scheduled to be able to predict their course of disease.”
The authors investigated the decrease of PPG in a single-center, retrospective analysis of 341 patients with liver cirrhosis undergoing TIPS insertion for recurrent or refractory ascites between March 1994 and July 2015. During each procedure, portal and inferior vena cava pressures were invasively measured and correlated with patients’ outcomes and ascites progression over time. In 241 patients, or 71%, chronic alcohol consumption was the reason for cirrhosis development, followed by 13% with chronic viral hepatitis (n = 43). Median survival after TIPS insertion was 102 weeks, and 19 patients received liver transplants over time.
Median portal pressure before TIPS placement was 28 mm Hg, which decreased to a median of 21 mm Hg after TIPS. Median PPG levels were 19 mm Hg before TIPS and 8 mm Hg immediately after TIPS placement.
At the time of TIPS placement, 65 patients, or 19%, had hepatic encephalopathy, and nine had severe hepatic encephalopathy. Six weeks after TIPS, two had episodes of hepatic encephalopathy.
After 6 weeks, ascites significantly improved through TIPS insertion. About 47% had a complete resolution of ascites at 6 weeks, whereas 29% had ascites detectable only by ultrasound and 24% of patients still needed large-volume paracentesis. There was an association between extent of PPG reduction and ascites resolution: Median PPG reduction was 55% of initial PPG in patients with persistence of severe ascites, 58% in patients with ascites detected by ultrasound, and 65% in patients with complete resolution of ascites at 6 weeks after TIPS.
Ascites resolved in 54% of patients with higher PPG reduction (60% or above), compared with 39% of patients with lower PPG reduction (below 60%). Ascites that was detected by ultrasound in another 27% of patients with higher PPG reduction, compared with 31% of patients with lower PPG reduction. In addition, persistent severe ascites was seen in 19% of patients with higher PPG reduction, compared with 30% of patients with lower PPG reduction.
The authors also noted the importance of timing follow-up evaluation: They noted that post-TIPS follow-up is a frequent question and not yet standardized; in this study, they found that, with follow-up at 6 weeks, they could “clearly stratify the course post TIPS” and this could “detect patients at high risk of unstable course of disease.”
PPG reduction of more than 60% after TIPS correlated with resolution of severe ascites 6 weeks after TIPS, the study authors concluded.
“This is one of the first studies that highlights the optimal goal for a portal pressure gradient in the setting of refractory ascites post TIPS procedure,” said Neeral Shah, MD, an associate professor of gastroenterology and hepatology and transplant hepatology specialist at the University of Virginia, Charlottesville.
“It is exciting to see some data from patients examining a question we have always thought to be true but have never quantified,” he said. “As a clinician who refers patients for TIPS, one of my biggest concerns is that significant shunting of blood past liver tissue through a TIPS can lead to the development of confusion.”
Dr. Shah, who wasn’t involved with the study, pointed to ongoing questions about hepatic encephalopathy around TIPS. The study authors didn’t find an issue with this among their study population, and some patients had improvements in their mental status after TIPS.
“This has not been my experience in those patients with hepatic encephalopathy at baseline pre-TIPS,” Dr. Shah said. “This point will need to be clarified further, especially if we are aiming for portal pressure gradients of 10 mm Hg or less in all patients with refractory ascites.”
The study authors declared that the research was conducted without commercial or financial relationships that could be construed as a potential conflict of interest. The authors were supported by the German Research Foundation, the German Federal Ministry of Education and Research, the European Union’s Horizon 2020 research program, and Goethe University Frankfurt. Dr. Shah reported no relevant disclosures.
FROM HEPATOLOGY
Ultrasound on par with CT for evaluating sarcopenia in patients with cirrhosis
Using ultrasound (US) to evaluate sarcopenic obesity in patients with cirrhosis may offer accuracy on par with computed tomography (CT), according to investigators.
US-based assessment presents a more affordable point-of-care strategy that limits radiation exposure, which enables sequential monitoring, reported lead author Sukhpal Dhariwal, MBBS, MD, of the Postgraduate Institute of Medical Education and Research, Chandigarh, India.
“Preliminary data in patients with liver disease ... suggest that US muscle assessment–derived indices, especially thigh muscle thickness, identify sarcopenia CT-skeletal muscle index (SMI) and also predict hospitalization and mortality,” the investigators wrote in Journal of Clinical Gastroenterology. “However, the applicability of US-based techniques to measure muscle mass in the high-risk group of patients with cirrhosis and sarcopenic obesity has not been evaluated.”
To address this knowledge gap, the investigators performed both US- and CT-based muscle assessments in 52 patients with obesity and evidence of cirrhosis; 40 patients were male and the mean age was 50.9 years. In all, 20 (38.5%) were diagnosed with sarcopenia based on CT-determined SMI scores of less than 39 cm2/m2 for women and 50 cm2/m2 for men.
US showed that it was similarly capable of categorizing patients. The modality significantly differentiated individuals with or without sarcopenia based on high area under the curve values in four muscle indices: quadriceps muscle thickness (0.98), quadriceps muscle feather index (0.95), forearm muscle thickness (0.85), and forearm feather index (0.80).
Direct comparison of US-based assessment against CT-based SMI revealed positive correlations, with significant r values ranging from 0.40 to 0.58. These correlations were stronger in a male-only subgroup analysis, in which r values ranged from 0.52 to 0.70. R values were not calculated in the female subgroup because of the small sample size (n = 12).
The investigators adjusted indices for height, which may pose bias for overestimating muscle mass. Another limitation is the small sample size.
“US-based assessment of sarcopenia has excellent diagnostic accuracy and correlates highly with cross-sectional imaging-based SMI in cirrhosis patients with sarcopenic obesity,” the investigators concluded. “US may serve as an easy-to-use, point-of-care tool for assessing sarcopenia in sarcopenic obesity with the advantage of repeated sequential assessment.”
According to Jamile Wakim-Fleming, MD, of the Cleveland Clinic, “US-based muscle mass assessment seems to be reliable, reproducible, and simple to perform and should be encouraged along with nutrition assessments in all patients with cirrhosis and obesity.”
In a written comment, Dr. Wakim-Fleming noted the importance of timely monitoring and intervention in this patient population.
“Considering the morbidity and the poor outcomes associated with sarcopenic obesity and its frequency in cirrhosis, it is important to make early diagnosis and institute a management plan to improve muscle mass and function,” she said.
The study was supported the Patient-Centered Outcomes Research Institute, the American Medical Association, and the American Heart Association. The investigators disclosed additional relationships with Pfizer, Bristol Myers Squibb, and Novartis. Dr. Wakim-Fleming reported no relevant conflicts of interest.
Using ultrasound (US) to evaluate sarcopenic obesity in patients with cirrhosis may offer accuracy on par with computed tomography (CT), according to investigators.
US-based assessment presents a more affordable point-of-care strategy that limits radiation exposure, which enables sequential monitoring, reported lead author Sukhpal Dhariwal, MBBS, MD, of the Postgraduate Institute of Medical Education and Research, Chandigarh, India.
“Preliminary data in patients with liver disease ... suggest that US muscle assessment–derived indices, especially thigh muscle thickness, identify sarcopenia CT-skeletal muscle index (SMI) and also predict hospitalization and mortality,” the investigators wrote in Journal of Clinical Gastroenterology. “However, the applicability of US-based techniques to measure muscle mass in the high-risk group of patients with cirrhosis and sarcopenic obesity has not been evaluated.”
To address this knowledge gap, the investigators performed both US- and CT-based muscle assessments in 52 patients with obesity and evidence of cirrhosis; 40 patients were male and the mean age was 50.9 years. In all, 20 (38.5%) were diagnosed with sarcopenia based on CT-determined SMI scores of less than 39 cm2/m2 for women and 50 cm2/m2 for men.
US showed that it was similarly capable of categorizing patients. The modality significantly differentiated individuals with or without sarcopenia based on high area under the curve values in four muscle indices: quadriceps muscle thickness (0.98), quadriceps muscle feather index (0.95), forearm muscle thickness (0.85), and forearm feather index (0.80).
Direct comparison of US-based assessment against CT-based SMI revealed positive correlations, with significant r values ranging from 0.40 to 0.58. These correlations were stronger in a male-only subgroup analysis, in which r values ranged from 0.52 to 0.70. R values were not calculated in the female subgroup because of the small sample size (n = 12).
The investigators adjusted indices for height, which may pose bias for overestimating muscle mass. Another limitation is the small sample size.
“US-based assessment of sarcopenia has excellent diagnostic accuracy and correlates highly with cross-sectional imaging-based SMI in cirrhosis patients with sarcopenic obesity,” the investigators concluded. “US may serve as an easy-to-use, point-of-care tool for assessing sarcopenia in sarcopenic obesity with the advantage of repeated sequential assessment.”
According to Jamile Wakim-Fleming, MD, of the Cleveland Clinic, “US-based muscle mass assessment seems to be reliable, reproducible, and simple to perform and should be encouraged along with nutrition assessments in all patients with cirrhosis and obesity.”
In a written comment, Dr. Wakim-Fleming noted the importance of timely monitoring and intervention in this patient population.
“Considering the morbidity and the poor outcomes associated with sarcopenic obesity and its frequency in cirrhosis, it is important to make early diagnosis and institute a management plan to improve muscle mass and function,” she said.
The study was supported the Patient-Centered Outcomes Research Institute, the American Medical Association, and the American Heart Association. The investigators disclosed additional relationships with Pfizer, Bristol Myers Squibb, and Novartis. Dr. Wakim-Fleming reported no relevant conflicts of interest.
Using ultrasound (US) to evaluate sarcopenic obesity in patients with cirrhosis may offer accuracy on par with computed tomography (CT), according to investigators.
US-based assessment presents a more affordable point-of-care strategy that limits radiation exposure, which enables sequential monitoring, reported lead author Sukhpal Dhariwal, MBBS, MD, of the Postgraduate Institute of Medical Education and Research, Chandigarh, India.
“Preliminary data in patients with liver disease ... suggest that US muscle assessment–derived indices, especially thigh muscle thickness, identify sarcopenia CT-skeletal muscle index (SMI) and also predict hospitalization and mortality,” the investigators wrote in Journal of Clinical Gastroenterology. “However, the applicability of US-based techniques to measure muscle mass in the high-risk group of patients with cirrhosis and sarcopenic obesity has not been evaluated.”
To address this knowledge gap, the investigators performed both US- and CT-based muscle assessments in 52 patients with obesity and evidence of cirrhosis; 40 patients were male and the mean age was 50.9 years. In all, 20 (38.5%) were diagnosed with sarcopenia based on CT-determined SMI scores of less than 39 cm2/m2 for women and 50 cm2/m2 for men.
US showed that it was similarly capable of categorizing patients. The modality significantly differentiated individuals with or without sarcopenia based on high area under the curve values in four muscle indices: quadriceps muscle thickness (0.98), quadriceps muscle feather index (0.95), forearm muscle thickness (0.85), and forearm feather index (0.80).
Direct comparison of US-based assessment against CT-based SMI revealed positive correlations, with significant r values ranging from 0.40 to 0.58. These correlations were stronger in a male-only subgroup analysis, in which r values ranged from 0.52 to 0.70. R values were not calculated in the female subgroup because of the small sample size (n = 12).
The investigators adjusted indices for height, which may pose bias for overestimating muscle mass. Another limitation is the small sample size.
“US-based assessment of sarcopenia has excellent diagnostic accuracy and correlates highly with cross-sectional imaging-based SMI in cirrhosis patients with sarcopenic obesity,” the investigators concluded. “US may serve as an easy-to-use, point-of-care tool for assessing sarcopenia in sarcopenic obesity with the advantage of repeated sequential assessment.”
According to Jamile Wakim-Fleming, MD, of the Cleveland Clinic, “US-based muscle mass assessment seems to be reliable, reproducible, and simple to perform and should be encouraged along with nutrition assessments in all patients with cirrhosis and obesity.”
In a written comment, Dr. Wakim-Fleming noted the importance of timely monitoring and intervention in this patient population.
“Considering the morbidity and the poor outcomes associated with sarcopenic obesity and its frequency in cirrhosis, it is important to make early diagnosis and institute a management plan to improve muscle mass and function,” she said.
The study was supported the Patient-Centered Outcomes Research Institute, the American Medical Association, and the American Heart Association. The investigators disclosed additional relationships with Pfizer, Bristol Myers Squibb, and Novartis. Dr. Wakim-Fleming reported no relevant conflicts of interest.
FROM JAMA INTERNAL MEDICINE
Liver protein protects against parenteral nutrition liver injury
Hepatic protein PP2A-C-alpha may serve as a protective factor against parenteral nutrition–associated hepatic steatosis by improving liver function, according to a recent study published in Cellular and Molecular Gastroenterology and Hepatology.
Parenteral nutrition–associated hepatic steatosis likely involves the down-regulation of hepatic PP2A-C-alpha and consequent increased phosphorylation of Akt2; this in turn alters hepatic lipid metabolism, promotes triglyceride accumulation, and leads to liver injury, wrote the researchers, led by Gulisudumu Maitiabula and Feng Tian of the Research Institute of General Surgery at Jinling Hospital, Nanjing, China, and the Medical School of Nanjing University.
“Our study provides a strong rationale that PP2A-C-alpha may be involved in the pathogenesis of [parenteral nutrition–associated hepatic steatosis],” they wrote. “Further research is merited to establish whether interventions to enhance PP2A function might suppress the development of hepatic steatosis in patients receiving long-term [parenteral nutrition].”
Parenteral nutrition can be a lifesaving therapy for patients with intestinal failure caused by insufficient bowel length or function, the authors noted However, long-term use can lead to potentially fatal complications such as liver disease, but an understanding of the pathological mechanisms behind parenteral nutrition–associated hepatic steatosis limited.
The research team performed comparative proteomic/phosphoproteomic analyses of liver samples from 10 patients with parenteral nutrition–associated hepatic steatosis, as well as 8 cholelithiasis patients as controls, who were admitted to Jinling Hospital between June 2018 and June 2019. The researchers also assessed the effect of PP2A-C-alpha on liver injury from total parenteral nutrition in mice.
The research team found that PP2A-C-alpha was down-regulated in patients and mice with parenteral nutrition–associated hepatic steatosis. In addition, in patients with parenteral nutrition–associated hepatic steatosis, they found enhanced activation of serine/threonine kinase Akt2 and decreased activation of AMPK.
Mice that were given total parenteral nutrition infusion for 14 days developed hepatic steatosis, down-regulation of PP2A-C-alpha, activation of Akt2, and inhibition of AMPK. Hepatocyte-specific deletion of PP2A-C-alpha in mice given parenteral nutrition exacerbated the Akt2 activation, AMPK inhibition, and hepatic steatosis through an effect on fatty acid degradation.
On the other hand, forced expression of PP2A-C-alpha led to reductions in hepatocyte fat deposition and the pathological score for liver steatosis. Overexpression also significantly improved hepatic steatosis, suppressed Akt2, and activated AMPK. In addition, pharmacological activation of Akt2 in mice overexpressing PP2A-C-alpha led to the aggravation of hepatic steatosis.
“Collectively, these observations suggest that [parenteral nutrition] for [more than] 14 days leads to a down-regulation in PP2A-C-alpha expression that activates Akt2-dependent signaling, which would likely lead to hepatic steatosis,” the study authors wrote.
Intervention trials of PP2A-C-alpha in humans have not been performed because PP2A-C-alpha activators or effector analogs were unavailable for clinical use, they wrote. Additional clinical studies are needed to investigate the effects of PP2A-C-alpha intervention on the development of hepatic steatosis in patients receiving long-term parenteral nutrition.
The study was supported by the National Natural Science Foundation of China, the Science Foundation of Outstanding Youth in Jiangsu Province, the National Science and Technology Research Funding for Public Welfare Medical Projects, “The 13th Five-Year Plan” Foundation of Jiangsu Province for Medical Key Talents, and the Natural Science Foundation of Jiangsu Province. The study authors disclosed no conflicts of interest.
New findings may lead to novel treatments
Parenteral nutrition is a life saver for children and adults with insufficient absorptive capacity of the gastrointestinal tract. Unfortunately, up to two-thirds of patients requiring parenteral nutrition long-term develop liver disease, which can have fatal outcomes. Parenteral nutrition–associated liver disease is characterized by fibrosis and steatosis. While portal inflammation and cholestasis resolve in patients who can be weaned off parenteral nutrition, portal fibrosis and steatosis unfortunately remain in about half of the patients. The development of therapeutic strategies for this condition has thus far been hampered by the fact that the molecular mechanism of parenteral nutrition–associated liver disease was unknown.
This study by Maitiabua and colleagues from Nanjing University Medical School addresses this problem by performing a proteomic and, importantly, phospho-proteomic analysis of liver biopsies from adults treated with parenteral nutrition compared to normally-feeding controls. They discovered that levels of phosphorylated AKT2, the key signaling mediator of insulin in the liver, are increased, while protein levels of the opposing protein phosphatase 2A (PP2A) are decreased in patients receiving parenteral nutrition.
Remarkably, they could reproduce these same pathway changes in a mouse model of parenteral nutrition, which again led to a chronic activation of the insulin signaling pathway, culminating in the phosphorylation of AKT2. They show further that activation of AKT2 inhibits AMPK and alters hepatic lipid metabolism to promote triglyceride accumulation. Using the experimentally tractable mouse model, they demonstrate further that the ablation of a PP2A isoform in the liver is sufficient to cause lipid accumulation and liver injury. Conversely, restoring PP2A expression improved the hepatic phenotype in mice in the parenteral nutrition model. These findings could also be mimicked using pharmacological activation and inhibition of PP2A.
In sum, this experimental study could some day lead the way to novel treatments of parenteral nutrition-induced liver disease through the use of PP2A activators.
Klaus H. Kaestner, PhD, is with the department of genetics and Center for Molecular Studies in Digestive and Liver Diseases, Perelman School of Medicine,University of Pennsylvania, Philadelphia.
New findings may lead to novel treatments
Parenteral nutrition is a life saver for children and adults with insufficient absorptive capacity of the gastrointestinal tract. Unfortunately, up to two-thirds of patients requiring parenteral nutrition long-term develop liver disease, which can have fatal outcomes. Parenteral nutrition–associated liver disease is characterized by fibrosis and steatosis. While portal inflammation and cholestasis resolve in patients who can be weaned off parenteral nutrition, portal fibrosis and steatosis unfortunately remain in about half of the patients. The development of therapeutic strategies for this condition has thus far been hampered by the fact that the molecular mechanism of parenteral nutrition–associated liver disease was unknown.
This study by Maitiabua and colleagues from Nanjing University Medical School addresses this problem by performing a proteomic and, importantly, phospho-proteomic analysis of liver biopsies from adults treated with parenteral nutrition compared to normally-feeding controls. They discovered that levels of phosphorylated AKT2, the key signaling mediator of insulin in the liver, are increased, while protein levels of the opposing protein phosphatase 2A (PP2A) are decreased in patients receiving parenteral nutrition.
Remarkably, they could reproduce these same pathway changes in a mouse model of parenteral nutrition, which again led to a chronic activation of the insulin signaling pathway, culminating in the phosphorylation of AKT2. They show further that activation of AKT2 inhibits AMPK and alters hepatic lipid metabolism to promote triglyceride accumulation. Using the experimentally tractable mouse model, they demonstrate further that the ablation of a PP2A isoform in the liver is sufficient to cause lipid accumulation and liver injury. Conversely, restoring PP2A expression improved the hepatic phenotype in mice in the parenteral nutrition model. These findings could also be mimicked using pharmacological activation and inhibition of PP2A.
In sum, this experimental study could some day lead the way to novel treatments of parenteral nutrition-induced liver disease through the use of PP2A activators.
Klaus H. Kaestner, PhD, is with the department of genetics and Center for Molecular Studies in Digestive and Liver Diseases, Perelman School of Medicine,University of Pennsylvania, Philadelphia.
New findings may lead to novel treatments
Parenteral nutrition is a life saver for children and adults with insufficient absorptive capacity of the gastrointestinal tract. Unfortunately, up to two-thirds of patients requiring parenteral nutrition long-term develop liver disease, which can have fatal outcomes. Parenteral nutrition–associated liver disease is characterized by fibrosis and steatosis. While portal inflammation and cholestasis resolve in patients who can be weaned off parenteral nutrition, portal fibrosis and steatosis unfortunately remain in about half of the patients. The development of therapeutic strategies for this condition has thus far been hampered by the fact that the molecular mechanism of parenteral nutrition–associated liver disease was unknown.
This study by Maitiabua and colleagues from Nanjing University Medical School addresses this problem by performing a proteomic and, importantly, phospho-proteomic analysis of liver biopsies from adults treated with parenteral nutrition compared to normally-feeding controls. They discovered that levels of phosphorylated AKT2, the key signaling mediator of insulin in the liver, are increased, while protein levels of the opposing protein phosphatase 2A (PP2A) are decreased in patients receiving parenteral nutrition.
Remarkably, they could reproduce these same pathway changes in a mouse model of parenteral nutrition, which again led to a chronic activation of the insulin signaling pathway, culminating in the phosphorylation of AKT2. They show further that activation of AKT2 inhibits AMPK and alters hepatic lipid metabolism to promote triglyceride accumulation. Using the experimentally tractable mouse model, they demonstrate further that the ablation of a PP2A isoform in the liver is sufficient to cause lipid accumulation and liver injury. Conversely, restoring PP2A expression improved the hepatic phenotype in mice in the parenteral nutrition model. These findings could also be mimicked using pharmacological activation and inhibition of PP2A.
In sum, this experimental study could some day lead the way to novel treatments of parenteral nutrition-induced liver disease through the use of PP2A activators.
Klaus H. Kaestner, PhD, is with the department of genetics and Center for Molecular Studies in Digestive and Liver Diseases, Perelman School of Medicine,University of Pennsylvania, Philadelphia.
Hepatic protein PP2A-C-alpha may serve as a protective factor against parenteral nutrition–associated hepatic steatosis by improving liver function, according to a recent study published in Cellular and Molecular Gastroenterology and Hepatology.
Parenteral nutrition–associated hepatic steatosis likely involves the down-regulation of hepatic PP2A-C-alpha and consequent increased phosphorylation of Akt2; this in turn alters hepatic lipid metabolism, promotes triglyceride accumulation, and leads to liver injury, wrote the researchers, led by Gulisudumu Maitiabula and Feng Tian of the Research Institute of General Surgery at Jinling Hospital, Nanjing, China, and the Medical School of Nanjing University.
“Our study provides a strong rationale that PP2A-C-alpha may be involved in the pathogenesis of [parenteral nutrition–associated hepatic steatosis],” they wrote. “Further research is merited to establish whether interventions to enhance PP2A function might suppress the development of hepatic steatosis in patients receiving long-term [parenteral nutrition].”
Parenteral nutrition can be a lifesaving therapy for patients with intestinal failure caused by insufficient bowel length or function, the authors noted However, long-term use can lead to potentially fatal complications such as liver disease, but an understanding of the pathological mechanisms behind parenteral nutrition–associated hepatic steatosis limited.
The research team performed comparative proteomic/phosphoproteomic analyses of liver samples from 10 patients with parenteral nutrition–associated hepatic steatosis, as well as 8 cholelithiasis patients as controls, who were admitted to Jinling Hospital between June 2018 and June 2019. The researchers also assessed the effect of PP2A-C-alpha on liver injury from total parenteral nutrition in mice.
The research team found that PP2A-C-alpha was down-regulated in patients and mice with parenteral nutrition–associated hepatic steatosis. In addition, in patients with parenteral nutrition–associated hepatic steatosis, they found enhanced activation of serine/threonine kinase Akt2 and decreased activation of AMPK.
Mice that were given total parenteral nutrition infusion for 14 days developed hepatic steatosis, down-regulation of PP2A-C-alpha, activation of Akt2, and inhibition of AMPK. Hepatocyte-specific deletion of PP2A-C-alpha in mice given parenteral nutrition exacerbated the Akt2 activation, AMPK inhibition, and hepatic steatosis through an effect on fatty acid degradation.
On the other hand, forced expression of PP2A-C-alpha led to reductions in hepatocyte fat deposition and the pathological score for liver steatosis. Overexpression also significantly improved hepatic steatosis, suppressed Akt2, and activated AMPK. In addition, pharmacological activation of Akt2 in mice overexpressing PP2A-C-alpha led to the aggravation of hepatic steatosis.
“Collectively, these observations suggest that [parenteral nutrition] for [more than] 14 days leads to a down-regulation in PP2A-C-alpha expression that activates Akt2-dependent signaling, which would likely lead to hepatic steatosis,” the study authors wrote.
Intervention trials of PP2A-C-alpha in humans have not been performed because PP2A-C-alpha activators or effector analogs were unavailable for clinical use, they wrote. Additional clinical studies are needed to investigate the effects of PP2A-C-alpha intervention on the development of hepatic steatosis in patients receiving long-term parenteral nutrition.
The study was supported by the National Natural Science Foundation of China, the Science Foundation of Outstanding Youth in Jiangsu Province, the National Science and Technology Research Funding for Public Welfare Medical Projects, “The 13th Five-Year Plan” Foundation of Jiangsu Province for Medical Key Talents, and the Natural Science Foundation of Jiangsu Province. The study authors disclosed no conflicts of interest.
Hepatic protein PP2A-C-alpha may serve as a protective factor against parenteral nutrition–associated hepatic steatosis by improving liver function, according to a recent study published in Cellular and Molecular Gastroenterology and Hepatology.
Parenteral nutrition–associated hepatic steatosis likely involves the down-regulation of hepatic PP2A-C-alpha and consequent increased phosphorylation of Akt2; this in turn alters hepatic lipid metabolism, promotes triglyceride accumulation, and leads to liver injury, wrote the researchers, led by Gulisudumu Maitiabula and Feng Tian of the Research Institute of General Surgery at Jinling Hospital, Nanjing, China, and the Medical School of Nanjing University.
“Our study provides a strong rationale that PP2A-C-alpha may be involved in the pathogenesis of [parenteral nutrition–associated hepatic steatosis],” they wrote. “Further research is merited to establish whether interventions to enhance PP2A function might suppress the development of hepatic steatosis in patients receiving long-term [parenteral nutrition].”
Parenteral nutrition can be a lifesaving therapy for patients with intestinal failure caused by insufficient bowel length or function, the authors noted However, long-term use can lead to potentially fatal complications such as liver disease, but an understanding of the pathological mechanisms behind parenteral nutrition–associated hepatic steatosis limited.
The research team performed comparative proteomic/phosphoproteomic analyses of liver samples from 10 patients with parenteral nutrition–associated hepatic steatosis, as well as 8 cholelithiasis patients as controls, who were admitted to Jinling Hospital between June 2018 and June 2019. The researchers also assessed the effect of PP2A-C-alpha on liver injury from total parenteral nutrition in mice.
The research team found that PP2A-C-alpha was down-regulated in patients and mice with parenteral nutrition–associated hepatic steatosis. In addition, in patients with parenteral nutrition–associated hepatic steatosis, they found enhanced activation of serine/threonine kinase Akt2 and decreased activation of AMPK.
Mice that were given total parenteral nutrition infusion for 14 days developed hepatic steatosis, down-regulation of PP2A-C-alpha, activation of Akt2, and inhibition of AMPK. Hepatocyte-specific deletion of PP2A-C-alpha in mice given parenteral nutrition exacerbated the Akt2 activation, AMPK inhibition, and hepatic steatosis through an effect on fatty acid degradation.
On the other hand, forced expression of PP2A-C-alpha led to reductions in hepatocyte fat deposition and the pathological score for liver steatosis. Overexpression also significantly improved hepatic steatosis, suppressed Akt2, and activated AMPK. In addition, pharmacological activation of Akt2 in mice overexpressing PP2A-C-alpha led to the aggravation of hepatic steatosis.
“Collectively, these observations suggest that [parenteral nutrition] for [more than] 14 days leads to a down-regulation in PP2A-C-alpha expression that activates Akt2-dependent signaling, which would likely lead to hepatic steatosis,” the study authors wrote.
Intervention trials of PP2A-C-alpha in humans have not been performed because PP2A-C-alpha activators or effector analogs were unavailable for clinical use, they wrote. Additional clinical studies are needed to investigate the effects of PP2A-C-alpha intervention on the development of hepatic steatosis in patients receiving long-term parenteral nutrition.
The study was supported by the National Natural Science Foundation of China, the Science Foundation of Outstanding Youth in Jiangsu Province, the National Science and Technology Research Funding for Public Welfare Medical Projects, “The 13th Five-Year Plan” Foundation of Jiangsu Province for Medical Key Talents, and the Natural Science Foundation of Jiangsu Province. The study authors disclosed no conflicts of interest.
FROM CELLULAR AND MOLECULAR GASTROENTEROLOGY AND HEPATOLOGY
Model may predict age-related mortality after TIPS implantation
Mortality after implantation of a transjugular intrahepatic portosystemic shunt (TIPS) is increased for patients aged 70 and older with cirrhosis, but creatinine and sodium levels can help with decision-making, according to a study published in Hepatology.
TIPS can improve survival in cirrhotic patients with refractory ascites or portal hypertensive bleeding, and age alone shouldn’t preclude older patients from receiving TIPS, wrote the researchers led by Francesco Vizzutti, MD, of the department of experimental and clinical medicine at the University of Florence in Italy.
“However, the indication for TIPS in older adult patients (70 years and over) is debated, and a specific prediction model developed in this particular setting is lacking,” they wrote.
Dr. Vizzutti and colleagues aimed to develop and validate a multivariable model to accurately predict mortality in older adults. They prospectively enrolled 411 patients at four Italian referral centers with de novo TIPS implantation for refractory ascites or secondary prophylaxis of variceal bleeding between October 2020 and March 2021.
All patients underwent TIPS placement using Viatorr-covered stent grafts. All patients had follow-up outpatient appointments every 6 months until the end of the study or when clinically indicated, such as recurrence of portal hypertension complications or TIPS dysfunction.
The research team created a competing risks model to predict liver-related mortality attributable to liver failure, portal hypertensive bleeding, hepatorenal syndrome, or hepatocellular carcinoma, with orthotopic liver transplant and death from extrahepatic causes considered as competing events. In older adults, the only competing event was death from extrahepatic causes because this age group could not receive orthotopic liver transplant.
Alcohol use disorder was the most common etiology at 37%, followed by viral infection at 30%. At the time of TIPS placement, alcohol use disorder was present as a main or concomitant etiology of liver disease in 181 patients, including 36 with active alcohol consumption.
Compared with younger patients, older adults had significantly higher prevalence of viral etiology (at 41%) and lower prevalence of alcohol use disorder (at 18%). In terms of liver function, older adults had significantly less advanced liver disease based on international normalized ratio levels, likely “reflecting a more careful selection by physicians when managing older adults,” the study authors wrote. However, older adults had significantly higher creatinine levels than younger patients, “underlining the importance of the assessment of kidney function when selecting patients for TIPS placement,” the authors wrote.
During a median follow-up time of about 20 months after TIPS placement, 99 of 411 (or 24%) of patients died of liver-related causes, 49 underwent a transplant, and 17 died of extrahepatic causes. Among the 99 older adults, 44 (or 44%) died of liver-related causes, and 7 patients died of extrahepatic causes.
In the overall cohort, the probabilities of liver-related death were 13% after 1 year, 17% after 2 years, and 24% after 3 years. The probabilities were higher in older adults, at 19% after 1 year, 30% after 2 years, and 41% after 3 years.
According to the model, age, alcoholic etiology, creatinine levels, and international normalized ratio levels were independently associated with a higher risk of liver-related death. In older adults, creatinine and sodium levels were the only independent risk factors for death.
Notably, older adult patients with favorable creatinine and sodium levels (1.2 mg/dL and 140 mEq/L, respectively) had survival probabilities of liver-related death at 1, 2, and 3 years from TIPS placement of 14%, 26%, and 34%, respectively, the authors wrote. In contrast, older adults with creatinine levels of 2.5 mg/dL and sodium levels of 130 mEq/L had worse outcomes, with risks of liver-related death of 71%, 92%, and 96%, respectively.
“These results suggest that older adult patients with preserved renal function and normal sodium levels could obtain a survival outcome after TIPS placement similar to younger patients,” they wrote. “Moreover, the occurrence of [hepatic encephalopathy] and/or recurrence of ascites or bleeding was not significantly different comparing the two groups of patients according to age.”
Future research should update the prediction model with larger sample sizes, the study authors wrote.
“The decision for or against TIPS should be made only after carefully weighing the risks and benefits, taking into consideration the available literature,” said Bubu Banini, MD, PhD, an assistant professor of digestive diseases and translational research director of the Metabolic Health and Weight Loss Program at Yale University, New Haven, Conn.
Dr. Banini, who wasn’t involved with the study, said the prediction model could be a useful tool to guide the decision-making process.
“As is usually the case with management of portal hypertension–related complications, a multidisciplinary discussion with evaluation of a multitude of factors, including quality of life, comorbidities, risks, and benefits, should guide decision-making,” she said.
Dr. Banini highlighted the finding that alcohol etiology for cirrhosis was associated with higher mortality compared with viral etiology.
“This is important in the context of unfortunately increasing trends in alcohol consumption in the pre- and peri-COVID era and the increased prevalence of alcohol-associated liver disease, especially in women,” she said.
The study was supported by grants from the University of Florence and the University of Modena and Reggio Emilia. The study authors have received lecture fees from Gore Medical, which creates stent grafts. Dr. Banini reported no relevant disclosures.
Mortality after implantation of a transjugular intrahepatic portosystemic shunt (TIPS) is increased for patients aged 70 and older with cirrhosis, but creatinine and sodium levels can help with decision-making, according to a study published in Hepatology.
TIPS can improve survival in cirrhotic patients with refractory ascites or portal hypertensive bleeding, and age alone shouldn’t preclude older patients from receiving TIPS, wrote the researchers led by Francesco Vizzutti, MD, of the department of experimental and clinical medicine at the University of Florence in Italy.
“However, the indication for TIPS in older adult patients (70 years and over) is debated, and a specific prediction model developed in this particular setting is lacking,” they wrote.
Dr. Vizzutti and colleagues aimed to develop and validate a multivariable model to accurately predict mortality in older adults. They prospectively enrolled 411 patients at four Italian referral centers with de novo TIPS implantation for refractory ascites or secondary prophylaxis of variceal bleeding between October 2020 and March 2021.
All patients underwent TIPS placement using Viatorr-covered stent grafts. All patients had follow-up outpatient appointments every 6 months until the end of the study or when clinically indicated, such as recurrence of portal hypertension complications or TIPS dysfunction.
The research team created a competing risks model to predict liver-related mortality attributable to liver failure, portal hypertensive bleeding, hepatorenal syndrome, or hepatocellular carcinoma, with orthotopic liver transplant and death from extrahepatic causes considered as competing events. In older adults, the only competing event was death from extrahepatic causes because this age group could not receive orthotopic liver transplant.
Alcohol use disorder was the most common etiology at 37%, followed by viral infection at 30%. At the time of TIPS placement, alcohol use disorder was present as a main or concomitant etiology of liver disease in 181 patients, including 36 with active alcohol consumption.
Compared with younger patients, older adults had significantly higher prevalence of viral etiology (at 41%) and lower prevalence of alcohol use disorder (at 18%). In terms of liver function, older adults had significantly less advanced liver disease based on international normalized ratio levels, likely “reflecting a more careful selection by physicians when managing older adults,” the study authors wrote. However, older adults had significantly higher creatinine levels than younger patients, “underlining the importance of the assessment of kidney function when selecting patients for TIPS placement,” the authors wrote.
During a median follow-up time of about 20 months after TIPS placement, 99 of 411 (or 24%) of patients died of liver-related causes, 49 underwent a transplant, and 17 died of extrahepatic causes. Among the 99 older adults, 44 (or 44%) died of liver-related causes, and 7 patients died of extrahepatic causes.
In the overall cohort, the probabilities of liver-related death were 13% after 1 year, 17% after 2 years, and 24% after 3 years. The probabilities were higher in older adults, at 19% after 1 year, 30% after 2 years, and 41% after 3 years.
According to the model, age, alcoholic etiology, creatinine levels, and international normalized ratio levels were independently associated with a higher risk of liver-related death. In older adults, creatinine and sodium levels were the only independent risk factors for death.
Notably, older adult patients with favorable creatinine and sodium levels (1.2 mg/dL and 140 mEq/L, respectively) had survival probabilities of liver-related death at 1, 2, and 3 years from TIPS placement of 14%, 26%, and 34%, respectively, the authors wrote. In contrast, older adults with creatinine levels of 2.5 mg/dL and sodium levels of 130 mEq/L had worse outcomes, with risks of liver-related death of 71%, 92%, and 96%, respectively.
“These results suggest that older adult patients with preserved renal function and normal sodium levels could obtain a survival outcome after TIPS placement similar to younger patients,” they wrote. “Moreover, the occurrence of [hepatic encephalopathy] and/or recurrence of ascites or bleeding was not significantly different comparing the two groups of patients according to age.”
Future research should update the prediction model with larger sample sizes, the study authors wrote.
“The decision for or against TIPS should be made only after carefully weighing the risks and benefits, taking into consideration the available literature,” said Bubu Banini, MD, PhD, an assistant professor of digestive diseases and translational research director of the Metabolic Health and Weight Loss Program at Yale University, New Haven, Conn.
Dr. Banini, who wasn’t involved with the study, said the prediction model could be a useful tool to guide the decision-making process.
“As is usually the case with management of portal hypertension–related complications, a multidisciplinary discussion with evaluation of a multitude of factors, including quality of life, comorbidities, risks, and benefits, should guide decision-making,” she said.
Dr. Banini highlighted the finding that alcohol etiology for cirrhosis was associated with higher mortality compared with viral etiology.
“This is important in the context of unfortunately increasing trends in alcohol consumption in the pre- and peri-COVID era and the increased prevalence of alcohol-associated liver disease, especially in women,” she said.
The study was supported by grants from the University of Florence and the University of Modena and Reggio Emilia. The study authors have received lecture fees from Gore Medical, which creates stent grafts. Dr. Banini reported no relevant disclosures.
Mortality after implantation of a transjugular intrahepatic portosystemic shunt (TIPS) is increased for patients aged 70 and older with cirrhosis, but creatinine and sodium levels can help with decision-making, according to a study published in Hepatology.
TIPS can improve survival in cirrhotic patients with refractory ascites or portal hypertensive bleeding, and age alone shouldn’t preclude older patients from receiving TIPS, wrote the researchers led by Francesco Vizzutti, MD, of the department of experimental and clinical medicine at the University of Florence in Italy.
“However, the indication for TIPS in older adult patients (70 years and over) is debated, and a specific prediction model developed in this particular setting is lacking,” they wrote.
Dr. Vizzutti and colleagues aimed to develop and validate a multivariable model to accurately predict mortality in older adults. They prospectively enrolled 411 patients at four Italian referral centers with de novo TIPS implantation for refractory ascites or secondary prophylaxis of variceal bleeding between October 2020 and March 2021.
All patients underwent TIPS placement using Viatorr-covered stent grafts. All patients had follow-up outpatient appointments every 6 months until the end of the study or when clinically indicated, such as recurrence of portal hypertension complications or TIPS dysfunction.
The research team created a competing risks model to predict liver-related mortality attributable to liver failure, portal hypertensive bleeding, hepatorenal syndrome, or hepatocellular carcinoma, with orthotopic liver transplant and death from extrahepatic causes considered as competing events. In older adults, the only competing event was death from extrahepatic causes because this age group could not receive orthotopic liver transplant.
Alcohol use disorder was the most common etiology at 37%, followed by viral infection at 30%. At the time of TIPS placement, alcohol use disorder was present as a main or concomitant etiology of liver disease in 181 patients, including 36 with active alcohol consumption.
Compared with younger patients, older adults had significantly higher prevalence of viral etiology (at 41%) and lower prevalence of alcohol use disorder (at 18%). In terms of liver function, older adults had significantly less advanced liver disease based on international normalized ratio levels, likely “reflecting a more careful selection by physicians when managing older adults,” the study authors wrote. However, older adults had significantly higher creatinine levels than younger patients, “underlining the importance of the assessment of kidney function when selecting patients for TIPS placement,” the authors wrote.
During a median follow-up time of about 20 months after TIPS placement, 99 of 411 (or 24%) of patients died of liver-related causes, 49 underwent a transplant, and 17 died of extrahepatic causes. Among the 99 older adults, 44 (or 44%) died of liver-related causes, and 7 patients died of extrahepatic causes.
In the overall cohort, the probabilities of liver-related death were 13% after 1 year, 17% after 2 years, and 24% after 3 years. The probabilities were higher in older adults, at 19% after 1 year, 30% after 2 years, and 41% after 3 years.
According to the model, age, alcoholic etiology, creatinine levels, and international normalized ratio levels were independently associated with a higher risk of liver-related death. In older adults, creatinine and sodium levels were the only independent risk factors for death.
Notably, older adult patients with favorable creatinine and sodium levels (1.2 mg/dL and 140 mEq/L, respectively) had survival probabilities of liver-related death at 1, 2, and 3 years from TIPS placement of 14%, 26%, and 34%, respectively, the authors wrote. In contrast, older adults with creatinine levels of 2.5 mg/dL and sodium levels of 130 mEq/L had worse outcomes, with risks of liver-related death of 71%, 92%, and 96%, respectively.
“These results suggest that older adult patients with preserved renal function and normal sodium levels could obtain a survival outcome after TIPS placement similar to younger patients,” they wrote. “Moreover, the occurrence of [hepatic encephalopathy] and/or recurrence of ascites or bleeding was not significantly different comparing the two groups of patients according to age.”
Future research should update the prediction model with larger sample sizes, the study authors wrote.
“The decision for or against TIPS should be made only after carefully weighing the risks and benefits, taking into consideration the available literature,” said Bubu Banini, MD, PhD, an assistant professor of digestive diseases and translational research director of the Metabolic Health and Weight Loss Program at Yale University, New Haven, Conn.
Dr. Banini, who wasn’t involved with the study, said the prediction model could be a useful tool to guide the decision-making process.
“As is usually the case with management of portal hypertension–related complications, a multidisciplinary discussion with evaluation of a multitude of factors, including quality of life, comorbidities, risks, and benefits, should guide decision-making,” she said.
Dr. Banini highlighted the finding that alcohol etiology for cirrhosis was associated with higher mortality compared with viral etiology.
“This is important in the context of unfortunately increasing trends in alcohol consumption in the pre- and peri-COVID era and the increased prevalence of alcohol-associated liver disease, especially in women,” she said.
The study was supported by grants from the University of Florence and the University of Modena and Reggio Emilia. The study authors have received lecture fees from Gore Medical, which creates stent grafts. Dr. Banini reported no relevant disclosures.
FROM HEPATOLOGY
NAFLD linked with increased heart failure risk
The risk of developing incident heart failure is 1.5-times higher in people with nonalcoholic fatty liver disease (NAFLD) during a median follow-up of 10 years, according to a new meta-analysis.
The risk appears to increase with greater liver disease severity and was independent of age, sex, ethnicity, obesity, and the presence of diabetes, hypertension, and other common cardiovascular risk factors.
“Health care professionals should be aware that the risk of new-onset heart failure is moderately higher in patients with NAFLD,” senior author Giovanni Targher, MD, said in an interview.
“Because of the link between the two conditions, more careful surveillance of these patients will be needed,” said Dr. Targher, who is an associate professor of diabetes and endocrinology at the University of Verona (Italy). “In particular, the results of this meta-analysis highlight the need for a patient-centered, multidisciplinary, and holistic approach to manage both liver disease and cardiovascular risk in patients with NAFLD.”
The study was published online in Gut.
Risk calculations
NAFLD has become one of the most common causes of chronic liver disease worldwide (affecting up to about 30% of the world’s adults), and is expected to rise sharply in the next decade, the study authors write. The disease is linked with liver-related conditions, such as nonalcoholic steatohepatitis, cirrhosis, and hepatocellular carcinoma, as well as complications in other organs.
Previous meta-analyses have found an association between NAFLD and a higher risk of heart failure, though the analyses included a relatively small number of studies and a relatively modest sample size, Dr. Targher and colleagues write.
Since then, several new cohort studies have examined the association, which inspired a new meta-analysis.
The research team analyzed 11 observational cohort studies with aggregate data on more than 11 million middle-aged people from different countries, including nearly 3 million with NAFLD and nearly 98,000 cases of incident heart failure over a median follow-up of 10 years.
In the studies, NAFLD was diagnosed by serum liver enzyme levels, serum biomarkers or scores, diagnostic codes, imaging techniques, or liver histology. Four studies were conducted in the United States, three were conducted in South Korea, and four were carried out in Europe, including Finland, Sweden, and the United Kingdom.
Dr. Targher and colleagues found that the presence of NAFLD was associated with a moderately higher risk of new-onset heart failure, with a pooled random-effects hazard ratio of 1.5. The risk was independent of age, sex, ethnicity, adiposity measures, diabetes, hypertension, and other typical cardiovascular risk factors.
The association between NAFLD and heart failure risk was consistent even when the comparison was stratified by study country, follow-up length, modality of heart failure diagnosis, and modality of NAFLD diagnosis.
In addition, sensitivity analyses didn’t change the results, and a funnel plot suggested that publication bias was unlikely.
“Accumulating evidence supports that NAFLD is part of a multisystem disease that adversely affects several extrahepatic organs, including the heart,” Dr. Targher said.
“NAFLD not only promotes accelerated coronary atherosclerosis but also confers a higher risk of myocardial abnormalities (cardiac remodeling and hypertrophy) and certain arrhythmias (mostly atrial fibrillation), which may precede and promote the development of new-onset heart failure over time,” he said.
Future research
Dr. Targher and colleagues also found that the risk of incident heart failure appeared to further increase with more advanced liver disease, particularly with higher levels of liver fibrosis, as assessed by noninvasive fibrosis biomarkers or histology. With only two cohort studies that examined the association, the authors judged there was insufficient data available to combine the studies into a meta-analysis.
But the observations are consistent with other recent meta-analyses that reported a significant association between the presence and severity of NAFLD and the risk of developing adverse cardiovascular outcomes, atrial fibrillation, chronic kidney disease, or other non-liver complications.
“It’s reassuring that the observations that have come from single studies hold true when you look at the totality of evidence,” Ambarish Pandey, MD, a cardiologist and assistant professor of internal medicine at the University of Texas Southwestern Medical Center, Dallas, told this news organization.
Dr. Pandey, who wasn’t involved with this study, conducted one of the recent meta-analyses that found a 1.6-times increased risk of heart failure associated with NAFLD, as well as a further increased risk with more advanced liver disease.
Now Dr. Pandey and colleagues are studying the underlying mechanisms for the link between NAFLD and heart failure risk, including cardiac structure and function, biomarkers of injury and stress, and how proportions of liver fat influence risk. Additional studies should investigate whether resolving NAFLD could reduce the risk of heart failure, he said.
“It’s really important to look for patients with NAFLD in primary care and think about cardiovascular disease in our liver patients,” he said. “Early strategies to implement the prevention of heart failure would go a long way in reducing long-term risks for these patients.”
The study authors did not declare a specific grant for this research from any funding agency in the public, commercial, or nonprofit sectors. Dr. Targher and Dr. Pandey report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
The risk of developing incident heart failure is 1.5-times higher in people with nonalcoholic fatty liver disease (NAFLD) during a median follow-up of 10 years, according to a new meta-analysis.
The risk appears to increase with greater liver disease severity and was independent of age, sex, ethnicity, obesity, and the presence of diabetes, hypertension, and other common cardiovascular risk factors.
“Health care professionals should be aware that the risk of new-onset heart failure is moderately higher in patients with NAFLD,” senior author Giovanni Targher, MD, said in an interview.
“Because of the link between the two conditions, more careful surveillance of these patients will be needed,” said Dr. Targher, who is an associate professor of diabetes and endocrinology at the University of Verona (Italy). “In particular, the results of this meta-analysis highlight the need for a patient-centered, multidisciplinary, and holistic approach to manage both liver disease and cardiovascular risk in patients with NAFLD.”
The study was published online in Gut.
Risk calculations
NAFLD has become one of the most common causes of chronic liver disease worldwide (affecting up to about 30% of the world’s adults), and is expected to rise sharply in the next decade, the study authors write. The disease is linked with liver-related conditions, such as nonalcoholic steatohepatitis, cirrhosis, and hepatocellular carcinoma, as well as complications in other organs.
Previous meta-analyses have found an association between NAFLD and a higher risk of heart failure, though the analyses included a relatively small number of studies and a relatively modest sample size, Dr. Targher and colleagues write.
Since then, several new cohort studies have examined the association, which inspired a new meta-analysis.
The research team analyzed 11 observational cohort studies with aggregate data on more than 11 million middle-aged people from different countries, including nearly 3 million with NAFLD and nearly 98,000 cases of incident heart failure over a median follow-up of 10 years.
In the studies, NAFLD was diagnosed by serum liver enzyme levels, serum biomarkers or scores, diagnostic codes, imaging techniques, or liver histology. Four studies were conducted in the United States, three were conducted in South Korea, and four were carried out in Europe, including Finland, Sweden, and the United Kingdom.
Dr. Targher and colleagues found that the presence of NAFLD was associated with a moderately higher risk of new-onset heart failure, with a pooled random-effects hazard ratio of 1.5. The risk was independent of age, sex, ethnicity, adiposity measures, diabetes, hypertension, and other typical cardiovascular risk factors.
The association between NAFLD and heart failure risk was consistent even when the comparison was stratified by study country, follow-up length, modality of heart failure diagnosis, and modality of NAFLD diagnosis.
In addition, sensitivity analyses didn’t change the results, and a funnel plot suggested that publication bias was unlikely.
“Accumulating evidence supports that NAFLD is part of a multisystem disease that adversely affects several extrahepatic organs, including the heart,” Dr. Targher said.
“NAFLD not only promotes accelerated coronary atherosclerosis but also confers a higher risk of myocardial abnormalities (cardiac remodeling and hypertrophy) and certain arrhythmias (mostly atrial fibrillation), which may precede and promote the development of new-onset heart failure over time,” he said.
Future research
Dr. Targher and colleagues also found that the risk of incident heart failure appeared to further increase with more advanced liver disease, particularly with higher levels of liver fibrosis, as assessed by noninvasive fibrosis biomarkers or histology. With only two cohort studies that examined the association, the authors judged there was insufficient data available to combine the studies into a meta-analysis.
But the observations are consistent with other recent meta-analyses that reported a significant association between the presence and severity of NAFLD and the risk of developing adverse cardiovascular outcomes, atrial fibrillation, chronic kidney disease, or other non-liver complications.
“It’s reassuring that the observations that have come from single studies hold true when you look at the totality of evidence,” Ambarish Pandey, MD, a cardiologist and assistant professor of internal medicine at the University of Texas Southwestern Medical Center, Dallas, told this news organization.
Dr. Pandey, who wasn’t involved with this study, conducted one of the recent meta-analyses that found a 1.6-times increased risk of heart failure associated with NAFLD, as well as a further increased risk with more advanced liver disease.
Now Dr. Pandey and colleagues are studying the underlying mechanisms for the link between NAFLD and heart failure risk, including cardiac structure and function, biomarkers of injury and stress, and how proportions of liver fat influence risk. Additional studies should investigate whether resolving NAFLD could reduce the risk of heart failure, he said.
“It’s really important to look for patients with NAFLD in primary care and think about cardiovascular disease in our liver patients,” he said. “Early strategies to implement the prevention of heart failure would go a long way in reducing long-term risks for these patients.”
The study authors did not declare a specific grant for this research from any funding agency in the public, commercial, or nonprofit sectors. Dr. Targher and Dr. Pandey report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
The risk of developing incident heart failure is 1.5-times higher in people with nonalcoholic fatty liver disease (NAFLD) during a median follow-up of 10 years, according to a new meta-analysis.
The risk appears to increase with greater liver disease severity and was independent of age, sex, ethnicity, obesity, and the presence of diabetes, hypertension, and other common cardiovascular risk factors.
“Health care professionals should be aware that the risk of new-onset heart failure is moderately higher in patients with NAFLD,” senior author Giovanni Targher, MD, said in an interview.
“Because of the link between the two conditions, more careful surveillance of these patients will be needed,” said Dr. Targher, who is an associate professor of diabetes and endocrinology at the University of Verona (Italy). “In particular, the results of this meta-analysis highlight the need for a patient-centered, multidisciplinary, and holistic approach to manage both liver disease and cardiovascular risk in patients with NAFLD.”
The study was published online in Gut.
Risk calculations
NAFLD has become one of the most common causes of chronic liver disease worldwide (affecting up to about 30% of the world’s adults), and is expected to rise sharply in the next decade, the study authors write. The disease is linked with liver-related conditions, such as nonalcoholic steatohepatitis, cirrhosis, and hepatocellular carcinoma, as well as complications in other organs.
Previous meta-analyses have found an association between NAFLD and a higher risk of heart failure, though the analyses included a relatively small number of studies and a relatively modest sample size, Dr. Targher and colleagues write.
Since then, several new cohort studies have examined the association, which inspired a new meta-analysis.
The research team analyzed 11 observational cohort studies with aggregate data on more than 11 million middle-aged people from different countries, including nearly 3 million with NAFLD and nearly 98,000 cases of incident heart failure over a median follow-up of 10 years.
In the studies, NAFLD was diagnosed by serum liver enzyme levels, serum biomarkers or scores, diagnostic codes, imaging techniques, or liver histology. Four studies were conducted in the United States, three were conducted in South Korea, and four were carried out in Europe, including Finland, Sweden, and the United Kingdom.
Dr. Targher and colleagues found that the presence of NAFLD was associated with a moderately higher risk of new-onset heart failure, with a pooled random-effects hazard ratio of 1.5. The risk was independent of age, sex, ethnicity, adiposity measures, diabetes, hypertension, and other typical cardiovascular risk factors.
The association between NAFLD and heart failure risk was consistent even when the comparison was stratified by study country, follow-up length, modality of heart failure diagnosis, and modality of NAFLD diagnosis.
In addition, sensitivity analyses didn’t change the results, and a funnel plot suggested that publication bias was unlikely.
“Accumulating evidence supports that NAFLD is part of a multisystem disease that adversely affects several extrahepatic organs, including the heart,” Dr. Targher said.
“NAFLD not only promotes accelerated coronary atherosclerosis but also confers a higher risk of myocardial abnormalities (cardiac remodeling and hypertrophy) and certain arrhythmias (mostly atrial fibrillation), which may precede and promote the development of new-onset heart failure over time,” he said.
Future research
Dr. Targher and colleagues also found that the risk of incident heart failure appeared to further increase with more advanced liver disease, particularly with higher levels of liver fibrosis, as assessed by noninvasive fibrosis biomarkers or histology. With only two cohort studies that examined the association, the authors judged there was insufficient data available to combine the studies into a meta-analysis.
But the observations are consistent with other recent meta-analyses that reported a significant association between the presence and severity of NAFLD and the risk of developing adverse cardiovascular outcomes, atrial fibrillation, chronic kidney disease, or other non-liver complications.
“It’s reassuring that the observations that have come from single studies hold true when you look at the totality of evidence,” Ambarish Pandey, MD, a cardiologist and assistant professor of internal medicine at the University of Texas Southwestern Medical Center, Dallas, told this news organization.
Dr. Pandey, who wasn’t involved with this study, conducted one of the recent meta-analyses that found a 1.6-times increased risk of heart failure associated with NAFLD, as well as a further increased risk with more advanced liver disease.
Now Dr. Pandey and colleagues are studying the underlying mechanisms for the link between NAFLD and heart failure risk, including cardiac structure and function, biomarkers of injury and stress, and how proportions of liver fat influence risk. Additional studies should investigate whether resolving NAFLD could reduce the risk of heart failure, he said.
“It’s really important to look for patients with NAFLD in primary care and think about cardiovascular disease in our liver patients,” he said. “Early strategies to implement the prevention of heart failure would go a long way in reducing long-term risks for these patients.”
The study authors did not declare a specific grant for this research from any funding agency in the public, commercial, or nonprofit sectors. Dr. Targher and Dr. Pandey report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM GUT