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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
Abbott to start making Similac baby formula again
Abbott Nutrition is resuming production of Similac, its leading baby formula, at a Michigan plant that was shut down earlier in 2022 because of contamination concerns.
The company closed the plant in February, which triggered a national shortage of baby formula amid pandemic-related supply chain issues that created a lack of formula ingredients.
“We know that the nationwide infant formula shortage has been difficult for the families we serve, and while restarting Similac production in Michigan is an important milestone, we won’t rest until this product is back on shelves,” Robert Ford, chairman and CEO of Abbott, said in a statement on Aug. 26.
“Making infant formula is a responsibility we take very seriously, and parents can feel confident in the quality and safety of Similac and other Abbott formulas,” he said. “We are committed to re-earning the trust parents and health care providers have placed in us for decades.”
Abbott estimated that it will take about 6 weeks for Similac products to ship to stores. Production has restarted, which will be followed by “enhanced” testing before and after the formula is made.
In February, Abbott voluntarily recalled batches of three formulas after the Food and Drug Administration received consumer complaints about infants becoming sick. Four babies who consumed formulas from the Michigan plant got bacterial infections, and at least two babies died.
The illnesses were linked to Cronobacter sakazakii – bacteria that can lead to life-threatening infections and inflammation of the brain and spine.
After investigations at the plant, Abbott said there is no conclusive evidence to link the formula to the illnesses. No samples of the recalled product tested positive for the bacteria, and in all four cases, unopened containers of formula in the infants’ homes tested negative for the bacteria.
At the same time, FDA officials said in May that the Michigan plant had a leaking roof, water pooling on the floor, and cracks in production equipment that could allow bacteria to grow, according to The New York Times.
Abbott agreed with the federal government to create new safeguards, such as hiring a qualified expert to oversee improvements at the plant and notify the FDA if any issues were identified, the newspaper reported.
On July 1, the company restarted production of EleCare, a specialty formula, and later resumed production of some metabolic formulas. These products will begin to ship in coming weeks, the company said.
Since July, C. sakazakii has been found in a couple of batches of formula.
“In those cases, we found the issue, addressed it and no affected product has been or will be distributed,” Abbott said in the statement. “This confirms our quality systems work.”
In August, Abbott will supply the United States with more than 8 million pounds of infant formula, which is higher than the levels in August 2021, the company said. To ensure that people in the federal Special Supplemental Nutrition Program for Women, Infants and Children have access to formula, the company is extending rebates until the end of October.
“Restarting a large manufacturing facility after a several-month shutdown is a complex process, and it takes time to ensure that equipment, processes and production are functioning smoothly and sustainably,” the company said in the statement. “There have been – and likely will be – stops and starts from time to time. We’ve experienced events like severe weather, we’ve had to make mechanical adjustments, and we’ve had to discard some early production batches that didn’t meet our standards.”
A version of this article first appeared on WebMD.com.
Abbott Nutrition is resuming production of Similac, its leading baby formula, at a Michigan plant that was shut down earlier in 2022 because of contamination concerns.
The company closed the plant in February, which triggered a national shortage of baby formula amid pandemic-related supply chain issues that created a lack of formula ingredients.
“We know that the nationwide infant formula shortage has been difficult for the families we serve, and while restarting Similac production in Michigan is an important milestone, we won’t rest until this product is back on shelves,” Robert Ford, chairman and CEO of Abbott, said in a statement on Aug. 26.
“Making infant formula is a responsibility we take very seriously, and parents can feel confident in the quality and safety of Similac and other Abbott formulas,” he said. “We are committed to re-earning the trust parents and health care providers have placed in us for decades.”
Abbott estimated that it will take about 6 weeks for Similac products to ship to stores. Production has restarted, which will be followed by “enhanced” testing before and after the formula is made.
In February, Abbott voluntarily recalled batches of three formulas after the Food and Drug Administration received consumer complaints about infants becoming sick. Four babies who consumed formulas from the Michigan plant got bacterial infections, and at least two babies died.
The illnesses were linked to Cronobacter sakazakii – bacteria that can lead to life-threatening infections and inflammation of the brain and spine.
After investigations at the plant, Abbott said there is no conclusive evidence to link the formula to the illnesses. No samples of the recalled product tested positive for the bacteria, and in all four cases, unopened containers of formula in the infants’ homes tested negative for the bacteria.
At the same time, FDA officials said in May that the Michigan plant had a leaking roof, water pooling on the floor, and cracks in production equipment that could allow bacteria to grow, according to The New York Times.
Abbott agreed with the federal government to create new safeguards, such as hiring a qualified expert to oversee improvements at the plant and notify the FDA if any issues were identified, the newspaper reported.
On July 1, the company restarted production of EleCare, a specialty formula, and later resumed production of some metabolic formulas. These products will begin to ship in coming weeks, the company said.
Since July, C. sakazakii has been found in a couple of batches of formula.
“In those cases, we found the issue, addressed it and no affected product has been or will be distributed,” Abbott said in the statement. “This confirms our quality systems work.”
In August, Abbott will supply the United States with more than 8 million pounds of infant formula, which is higher than the levels in August 2021, the company said. To ensure that people in the federal Special Supplemental Nutrition Program for Women, Infants and Children have access to formula, the company is extending rebates until the end of October.
“Restarting a large manufacturing facility after a several-month shutdown is a complex process, and it takes time to ensure that equipment, processes and production are functioning smoothly and sustainably,” the company said in the statement. “There have been – and likely will be – stops and starts from time to time. We’ve experienced events like severe weather, we’ve had to make mechanical adjustments, and we’ve had to discard some early production batches that didn’t meet our standards.”
A version of this article first appeared on WebMD.com.
Abbott Nutrition is resuming production of Similac, its leading baby formula, at a Michigan plant that was shut down earlier in 2022 because of contamination concerns.
The company closed the plant in February, which triggered a national shortage of baby formula amid pandemic-related supply chain issues that created a lack of formula ingredients.
“We know that the nationwide infant formula shortage has been difficult for the families we serve, and while restarting Similac production in Michigan is an important milestone, we won’t rest until this product is back on shelves,” Robert Ford, chairman and CEO of Abbott, said in a statement on Aug. 26.
“Making infant formula is a responsibility we take very seriously, and parents can feel confident in the quality and safety of Similac and other Abbott formulas,” he said. “We are committed to re-earning the trust parents and health care providers have placed in us for decades.”
Abbott estimated that it will take about 6 weeks for Similac products to ship to stores. Production has restarted, which will be followed by “enhanced” testing before and after the formula is made.
In February, Abbott voluntarily recalled batches of three formulas after the Food and Drug Administration received consumer complaints about infants becoming sick. Four babies who consumed formulas from the Michigan plant got bacterial infections, and at least two babies died.
The illnesses were linked to Cronobacter sakazakii – bacteria that can lead to life-threatening infections and inflammation of the brain and spine.
After investigations at the plant, Abbott said there is no conclusive evidence to link the formula to the illnesses. No samples of the recalled product tested positive for the bacteria, and in all four cases, unopened containers of formula in the infants’ homes tested negative for the bacteria.
At the same time, FDA officials said in May that the Michigan plant had a leaking roof, water pooling on the floor, and cracks in production equipment that could allow bacteria to grow, according to The New York Times.
Abbott agreed with the federal government to create new safeguards, such as hiring a qualified expert to oversee improvements at the plant and notify the FDA if any issues were identified, the newspaper reported.
On July 1, the company restarted production of EleCare, a specialty formula, and later resumed production of some metabolic formulas. These products will begin to ship in coming weeks, the company said.
Since July, C. sakazakii has been found in a couple of batches of formula.
“In those cases, we found the issue, addressed it and no affected product has been or will be distributed,” Abbott said in the statement. “This confirms our quality systems work.”
In August, Abbott will supply the United States with more than 8 million pounds of infant formula, which is higher than the levels in August 2021, the company said. To ensure that people in the federal Special Supplemental Nutrition Program for Women, Infants and Children have access to formula, the company is extending rebates until the end of October.
“Restarting a large manufacturing facility after a several-month shutdown is a complex process, and it takes time to ensure that equipment, processes and production are functioning smoothly and sustainably,” the company said in the statement. “There have been – and likely will be – stops and starts from time to time. We’ve experienced events like severe weather, we’ve had to make mechanical adjustments, and we’ve had to discard some early production batches that didn’t meet our standards.”
A version of this article first appeared on WebMD.com.
Paxlovid reduces risk of COVID death by 79% in older adults
The antiviral drug Paxlovid appears to reduce the risk of dying from COVID-19 by 79% and decrease hospitalizations by 73% in at-risk patients who are ages 65 and older, according to a new study published in The New England Journal of Medicine.
The pill, which is a combination of the drugs nirmatrelvir and ritonavir, received FDA emergency use authorization in December 2021 to treat mild to moderate disease in ages 12 and older who face high risks for having severe COVID-19, hospitalization, and death.
“The results of the study show unequivocally that treatment with Paxlovid significantly reduces the risk of hospitalization and death from COVID-19,” Doron Netzer, MD, the senior study author and a researcher with Clalit Health Services, Tel Aviv, told The Jerusalem Post.
“We are the country’s leader in the provision of giving Paxlovid to relevant patients,” he said. “It was given to patients all over the country, with medical teams monitoring the patients who took the pills.”
, the news outlet reported. The research team analyzed information from Clalit’s electronic medical records. The health care organization covers about 52% of the Israeli population and almost two-thirds of older adults. More than 30,000 COVID-19 patients in Israel have been treated with the drug so far.
Dr. Netzer and colleagues looked at hospitalization and death data for at-risk COVID-19 patients ages 40 and older between Jan. 9 and March 31, when the original Omicron variant was the dominant strain in Israel. During that time, more than 1.1 million Clalit patients were infected with COVID-19, 109,000 patients were considered at-risk, and 3,900 patients received the drug.
The average age of the patients was 60, and 39% of the patients were 65 and older. Overall, 78% of the patients had previous COVID-19 immunity due to vaccination, prior infection, or both.
Among ages 65 and older, the rate of COVID-19 hospitalization was 14.7 cases per 100,000 person-days among treated patients, compared with 58.9 cases per 100,000 person-days among untreated patients. This represented a 73% lower chance of being hospitalized.
Among ages 40-64, the rate of hospitalization due to COVID-19 was 15.2 cases per 100,000 person-days among treated patients, compared with 15.8 cases per 100,000 person-days among untreated patients. The risk of hospitalization wasn’t significantly lower for this age group.
Among ages 65 and older, there were two deaths from COVID-19 in 2,484 treated patients, compared with 158 in the 40,337 untreated patients. This represented a 79% lower chance of dying from COVID-19.
Among ages 40-64, there was one death from COVID-19 in 1,418 treated patients, compared with 16 in the 65,015 untreated patients. The risk of death wasn’t significantly lower for this age group.
For both age groups, a lack of previous COVID-19 immunity and a previous hospitalization were most strongly linked to high rates of hospitalization during the Omicron wave.
The researchers noted that they didn’t break down the data on ages 40-64 who had cancer and other severe conditions that weaken the immune system. These patients may be more likely to benefit from Paxlovid, they said, though future studies will need to analyze the data.
The study didn’t receive any financial or in-kind support, the authors said.
A version of this article first appeared on WebMD.com.
The antiviral drug Paxlovid appears to reduce the risk of dying from COVID-19 by 79% and decrease hospitalizations by 73% in at-risk patients who are ages 65 and older, according to a new study published in The New England Journal of Medicine.
The pill, which is a combination of the drugs nirmatrelvir and ritonavir, received FDA emergency use authorization in December 2021 to treat mild to moderate disease in ages 12 and older who face high risks for having severe COVID-19, hospitalization, and death.
“The results of the study show unequivocally that treatment with Paxlovid significantly reduces the risk of hospitalization and death from COVID-19,” Doron Netzer, MD, the senior study author and a researcher with Clalit Health Services, Tel Aviv, told The Jerusalem Post.
“We are the country’s leader in the provision of giving Paxlovid to relevant patients,” he said. “It was given to patients all over the country, with medical teams monitoring the patients who took the pills.”
, the news outlet reported. The research team analyzed information from Clalit’s electronic medical records. The health care organization covers about 52% of the Israeli population and almost two-thirds of older adults. More than 30,000 COVID-19 patients in Israel have been treated with the drug so far.
Dr. Netzer and colleagues looked at hospitalization and death data for at-risk COVID-19 patients ages 40 and older between Jan. 9 and March 31, when the original Omicron variant was the dominant strain in Israel. During that time, more than 1.1 million Clalit patients were infected with COVID-19, 109,000 patients were considered at-risk, and 3,900 patients received the drug.
The average age of the patients was 60, and 39% of the patients were 65 and older. Overall, 78% of the patients had previous COVID-19 immunity due to vaccination, prior infection, or both.
Among ages 65 and older, the rate of COVID-19 hospitalization was 14.7 cases per 100,000 person-days among treated patients, compared with 58.9 cases per 100,000 person-days among untreated patients. This represented a 73% lower chance of being hospitalized.
Among ages 40-64, the rate of hospitalization due to COVID-19 was 15.2 cases per 100,000 person-days among treated patients, compared with 15.8 cases per 100,000 person-days among untreated patients. The risk of hospitalization wasn’t significantly lower for this age group.
Among ages 65 and older, there were two deaths from COVID-19 in 2,484 treated patients, compared with 158 in the 40,337 untreated patients. This represented a 79% lower chance of dying from COVID-19.
Among ages 40-64, there was one death from COVID-19 in 1,418 treated patients, compared with 16 in the 65,015 untreated patients. The risk of death wasn’t significantly lower for this age group.
For both age groups, a lack of previous COVID-19 immunity and a previous hospitalization were most strongly linked to high rates of hospitalization during the Omicron wave.
The researchers noted that they didn’t break down the data on ages 40-64 who had cancer and other severe conditions that weaken the immune system. These patients may be more likely to benefit from Paxlovid, they said, though future studies will need to analyze the data.
The study didn’t receive any financial or in-kind support, the authors said.
A version of this article first appeared on WebMD.com.
The antiviral drug Paxlovid appears to reduce the risk of dying from COVID-19 by 79% and decrease hospitalizations by 73% in at-risk patients who are ages 65 and older, according to a new study published in The New England Journal of Medicine.
The pill, which is a combination of the drugs nirmatrelvir and ritonavir, received FDA emergency use authorization in December 2021 to treat mild to moderate disease in ages 12 and older who face high risks for having severe COVID-19, hospitalization, and death.
“The results of the study show unequivocally that treatment with Paxlovid significantly reduces the risk of hospitalization and death from COVID-19,” Doron Netzer, MD, the senior study author and a researcher with Clalit Health Services, Tel Aviv, told The Jerusalem Post.
“We are the country’s leader in the provision of giving Paxlovid to relevant patients,” he said. “It was given to patients all over the country, with medical teams monitoring the patients who took the pills.”
, the news outlet reported. The research team analyzed information from Clalit’s electronic medical records. The health care organization covers about 52% of the Israeli population and almost two-thirds of older adults. More than 30,000 COVID-19 patients in Israel have been treated with the drug so far.
Dr. Netzer and colleagues looked at hospitalization and death data for at-risk COVID-19 patients ages 40 and older between Jan. 9 and March 31, when the original Omicron variant was the dominant strain in Israel. During that time, more than 1.1 million Clalit patients were infected with COVID-19, 109,000 patients were considered at-risk, and 3,900 patients received the drug.
The average age of the patients was 60, and 39% of the patients were 65 and older. Overall, 78% of the patients had previous COVID-19 immunity due to vaccination, prior infection, or both.
Among ages 65 and older, the rate of COVID-19 hospitalization was 14.7 cases per 100,000 person-days among treated patients, compared with 58.9 cases per 100,000 person-days among untreated patients. This represented a 73% lower chance of being hospitalized.
Among ages 40-64, the rate of hospitalization due to COVID-19 was 15.2 cases per 100,000 person-days among treated patients, compared with 15.8 cases per 100,000 person-days among untreated patients. The risk of hospitalization wasn’t significantly lower for this age group.
Among ages 65 and older, there were two deaths from COVID-19 in 2,484 treated patients, compared with 158 in the 40,337 untreated patients. This represented a 79% lower chance of dying from COVID-19.
Among ages 40-64, there was one death from COVID-19 in 1,418 treated patients, compared with 16 in the 65,015 untreated patients. The risk of death wasn’t significantly lower for this age group.
For both age groups, a lack of previous COVID-19 immunity and a previous hospitalization were most strongly linked to high rates of hospitalization during the Omicron wave.
The researchers noted that they didn’t break down the data on ages 40-64 who had cancer and other severe conditions that weaken the immune system. These patients may be more likely to benefit from Paxlovid, they said, though future studies will need to analyze the data.
The study didn’t receive any financial or in-kind support, the authors said.
A version of this article first appeared on WebMD.com.
FROM THE NEW ENGLAND JOURNAL OF MEDICINE
Hospitalized COVID-19 patients with GI symptoms have worse outcomes
Patients with COVID-19 who experience gastrointestinal symptoms have overall worse in-hospital complications but less cardiomyopathy and mortality, according to a new study.
About 20% of COVID-19 patients experience gastrointestinal symptoms, such as abdominal pain, diarrhea, nausea, and vomiting, which clinicians should consider when treating their hospitalized patients, wrote researchers led by Nikita Patil, MD, a hospitalist at Nash General Hospital–UNC Nash Healthcare in Rocky Mount, N.C., in Gastro Hep Advances.
“It’s important to know that certain complications are higher in people with GI symptoms,” she said in an interview. “Even without an increased risk of death, there are many problems that affect quality of life and lead to people not being able to do the things they were able to do before.”
Dr. Patil and colleagues analyzed the association of GI symptoms with adverse outcomes in 100,902 patients from the Cerner Real-World Data COVID-19 Database, which included hospital encounters and ED visits for COVID-19 between December 2019 to November 2020; the data were taken from EMRs at centers with which Cerner has a data use agreement. They also looked at factors associated with poor outcomes such as acute respiratory distress syndrome, sepsis, and ventilator requirement or oxygen dependence.
The average age of the patients was 52, and a higher proportion of patients with GI symptoms were 50 and older. Of those with GI symptoms, 54.5% were women. Overall, patients with GI symptoms were more likely to have higher Charlson Comorbidity Index scores and have comorbidities such as acute liver failure, gastroesophageal reflux disease, GI malignancy, and inflammatory bowel disease.
The research team found that COVID-19 patients with GI symptoms were more likely to have acute respiratory distress syndrome (odds ratio, 1.20; 95% confidence interval, 1.11-1.29), sepsis (OR, 1.19; 95% CI, 1.14-1.24), acute kidney injury (OR, 1.30; 95% CI, 1.24-1.36), venous thromboembolism (OR, 1.36; 95% CI, 1.22-1.52), and GI bleeding (OR 1.62; 95% CI, 1.47-1.79), as compared with COVID-19 patients without GI symptoms (P < .0001 for all comparisons). At the same time, those with GI symptoms were less likely to experience cardiomyopathy (OR, 0.87; 95% CI, 0.77-0.99; P = .027), respiratory failure (OR, 0.92; 95% CI, 0.88-0.95; P < .0001), or death (OR, 0.71; 95% CI, 0.67-0.75; P < .0001).
GI bleed was the most common GI complication, found among 2% of all patients, and was more likely in patients with GI symptoms than in those without (3.5% vs. 1.6%). Intestinal ischemia, pancreatitis, acute liver injury, and intestinal pseudo-obstruction weren’t associated with GI symptoms.
Among the 19,915 patients with GI symptoms, older age, higher Charlson Comorbidity Index scores, use of proton pump inhibitors, and use of H2 receptor antagonists were associated with higher mortality, acute respiratory distress syndrome, sepsis, and ventilator or oxygen requirement. Men with GI symptoms also had a higher risk of mortality, acute respiratory distress syndrome, and sepsis.
In particular, proton pump inhibitor use was associated with more than twice the risk of acute respiratory distress syndrome (OR, 2.19; 95% CI, 1.32-1.66; P < .0001). Similarly, H2 receptor antagonist use was associated with higher likelihood of death (OR, 1.78; 95% CI, 1.57-2.02), as well as more than three times the risk of acute respiratory distress syndrome (OR, 3.75; 95% CI, 3.29-4.28), more than twice the risk of sepsis (OR, 2.50; 95% CI, 2.28-2.73), and nearly twice the risk of ventilator or oxygen dependence (OR, 1.97; 95% CI, 1.68-2.30) (P < .0001 for all).
The findings could guide risk stratification, prognosis, and treatment decisions in COVID-19 patients with GI symptoms, as well as inform future research focused on risk mitigation and improvement of COVID-19 outcomes, Dr. Patil said.
“The protocols for COVID-19 treatment have changed over the past 2 years with blood thinners and steroids,” she said. “Although we likely can’t avoid anti-reflux medicines entirely, it’s something we need to be cognizant of and look out for in our hospitalized patients.”
One study limitation was its inclusion of only inpatient or ED encounters and, therefore, omission of those treated at home; this confers bias toward those with more aggressive disease, according to the authors.
The authors reported no grant support or funding sources for this study. One author declared grant support and consultant fees from several companies, including some medical and pharmaceutical companies, which were unrelated to this research. Dr. Patil reported no disclosures.
This article was updated Aug. 26, 2022.
Patients with COVID-19 who experience gastrointestinal symptoms have overall worse in-hospital complications but less cardiomyopathy and mortality, according to a new study.
About 20% of COVID-19 patients experience gastrointestinal symptoms, such as abdominal pain, diarrhea, nausea, and vomiting, which clinicians should consider when treating their hospitalized patients, wrote researchers led by Nikita Patil, MD, a hospitalist at Nash General Hospital–UNC Nash Healthcare in Rocky Mount, N.C., in Gastro Hep Advances.
“It’s important to know that certain complications are higher in people with GI symptoms,” she said in an interview. “Even without an increased risk of death, there are many problems that affect quality of life and lead to people not being able to do the things they were able to do before.”
Dr. Patil and colleagues analyzed the association of GI symptoms with adverse outcomes in 100,902 patients from the Cerner Real-World Data COVID-19 Database, which included hospital encounters and ED visits for COVID-19 between December 2019 to November 2020; the data were taken from EMRs at centers with which Cerner has a data use agreement. They also looked at factors associated with poor outcomes such as acute respiratory distress syndrome, sepsis, and ventilator requirement or oxygen dependence.
The average age of the patients was 52, and a higher proportion of patients with GI symptoms were 50 and older. Of those with GI symptoms, 54.5% were women. Overall, patients with GI symptoms were more likely to have higher Charlson Comorbidity Index scores and have comorbidities such as acute liver failure, gastroesophageal reflux disease, GI malignancy, and inflammatory bowel disease.
The research team found that COVID-19 patients with GI symptoms were more likely to have acute respiratory distress syndrome (odds ratio, 1.20; 95% confidence interval, 1.11-1.29), sepsis (OR, 1.19; 95% CI, 1.14-1.24), acute kidney injury (OR, 1.30; 95% CI, 1.24-1.36), venous thromboembolism (OR, 1.36; 95% CI, 1.22-1.52), and GI bleeding (OR 1.62; 95% CI, 1.47-1.79), as compared with COVID-19 patients without GI symptoms (P < .0001 for all comparisons). At the same time, those with GI symptoms were less likely to experience cardiomyopathy (OR, 0.87; 95% CI, 0.77-0.99; P = .027), respiratory failure (OR, 0.92; 95% CI, 0.88-0.95; P < .0001), or death (OR, 0.71; 95% CI, 0.67-0.75; P < .0001).
GI bleed was the most common GI complication, found among 2% of all patients, and was more likely in patients with GI symptoms than in those without (3.5% vs. 1.6%). Intestinal ischemia, pancreatitis, acute liver injury, and intestinal pseudo-obstruction weren’t associated with GI symptoms.
Among the 19,915 patients with GI symptoms, older age, higher Charlson Comorbidity Index scores, use of proton pump inhibitors, and use of H2 receptor antagonists were associated with higher mortality, acute respiratory distress syndrome, sepsis, and ventilator or oxygen requirement. Men with GI symptoms also had a higher risk of mortality, acute respiratory distress syndrome, and sepsis.
In particular, proton pump inhibitor use was associated with more than twice the risk of acute respiratory distress syndrome (OR, 2.19; 95% CI, 1.32-1.66; P < .0001). Similarly, H2 receptor antagonist use was associated with higher likelihood of death (OR, 1.78; 95% CI, 1.57-2.02), as well as more than three times the risk of acute respiratory distress syndrome (OR, 3.75; 95% CI, 3.29-4.28), more than twice the risk of sepsis (OR, 2.50; 95% CI, 2.28-2.73), and nearly twice the risk of ventilator or oxygen dependence (OR, 1.97; 95% CI, 1.68-2.30) (P < .0001 for all).
The findings could guide risk stratification, prognosis, and treatment decisions in COVID-19 patients with GI symptoms, as well as inform future research focused on risk mitigation and improvement of COVID-19 outcomes, Dr. Patil said.
“The protocols for COVID-19 treatment have changed over the past 2 years with blood thinners and steroids,” she said. “Although we likely can’t avoid anti-reflux medicines entirely, it’s something we need to be cognizant of and look out for in our hospitalized patients.”
One study limitation was its inclusion of only inpatient or ED encounters and, therefore, omission of those treated at home; this confers bias toward those with more aggressive disease, according to the authors.
The authors reported no grant support or funding sources for this study. One author declared grant support and consultant fees from several companies, including some medical and pharmaceutical companies, which were unrelated to this research. Dr. Patil reported no disclosures.
This article was updated Aug. 26, 2022.
Patients with COVID-19 who experience gastrointestinal symptoms have overall worse in-hospital complications but less cardiomyopathy and mortality, according to a new study.
About 20% of COVID-19 patients experience gastrointestinal symptoms, such as abdominal pain, diarrhea, nausea, and vomiting, which clinicians should consider when treating their hospitalized patients, wrote researchers led by Nikita Patil, MD, a hospitalist at Nash General Hospital–UNC Nash Healthcare in Rocky Mount, N.C., in Gastro Hep Advances.
“It’s important to know that certain complications are higher in people with GI symptoms,” she said in an interview. “Even without an increased risk of death, there are many problems that affect quality of life and lead to people not being able to do the things they were able to do before.”
Dr. Patil and colleagues analyzed the association of GI symptoms with adverse outcomes in 100,902 patients from the Cerner Real-World Data COVID-19 Database, which included hospital encounters and ED visits for COVID-19 between December 2019 to November 2020; the data were taken from EMRs at centers with which Cerner has a data use agreement. They also looked at factors associated with poor outcomes such as acute respiratory distress syndrome, sepsis, and ventilator requirement or oxygen dependence.
The average age of the patients was 52, and a higher proportion of patients with GI symptoms were 50 and older. Of those with GI symptoms, 54.5% were women. Overall, patients with GI symptoms were more likely to have higher Charlson Comorbidity Index scores and have comorbidities such as acute liver failure, gastroesophageal reflux disease, GI malignancy, and inflammatory bowel disease.
The research team found that COVID-19 patients with GI symptoms were more likely to have acute respiratory distress syndrome (odds ratio, 1.20; 95% confidence interval, 1.11-1.29), sepsis (OR, 1.19; 95% CI, 1.14-1.24), acute kidney injury (OR, 1.30; 95% CI, 1.24-1.36), venous thromboembolism (OR, 1.36; 95% CI, 1.22-1.52), and GI bleeding (OR 1.62; 95% CI, 1.47-1.79), as compared with COVID-19 patients without GI symptoms (P < .0001 for all comparisons). At the same time, those with GI symptoms were less likely to experience cardiomyopathy (OR, 0.87; 95% CI, 0.77-0.99; P = .027), respiratory failure (OR, 0.92; 95% CI, 0.88-0.95; P < .0001), or death (OR, 0.71; 95% CI, 0.67-0.75; P < .0001).
GI bleed was the most common GI complication, found among 2% of all patients, and was more likely in patients with GI symptoms than in those without (3.5% vs. 1.6%). Intestinal ischemia, pancreatitis, acute liver injury, and intestinal pseudo-obstruction weren’t associated with GI symptoms.
Among the 19,915 patients with GI symptoms, older age, higher Charlson Comorbidity Index scores, use of proton pump inhibitors, and use of H2 receptor antagonists were associated with higher mortality, acute respiratory distress syndrome, sepsis, and ventilator or oxygen requirement. Men with GI symptoms also had a higher risk of mortality, acute respiratory distress syndrome, and sepsis.
In particular, proton pump inhibitor use was associated with more than twice the risk of acute respiratory distress syndrome (OR, 2.19; 95% CI, 1.32-1.66; P < .0001). Similarly, H2 receptor antagonist use was associated with higher likelihood of death (OR, 1.78; 95% CI, 1.57-2.02), as well as more than three times the risk of acute respiratory distress syndrome (OR, 3.75; 95% CI, 3.29-4.28), more than twice the risk of sepsis (OR, 2.50; 95% CI, 2.28-2.73), and nearly twice the risk of ventilator or oxygen dependence (OR, 1.97; 95% CI, 1.68-2.30) (P < .0001 for all).
The findings could guide risk stratification, prognosis, and treatment decisions in COVID-19 patients with GI symptoms, as well as inform future research focused on risk mitigation and improvement of COVID-19 outcomes, Dr. Patil said.
“The protocols for COVID-19 treatment have changed over the past 2 years with blood thinners and steroids,” she said. “Although we likely can’t avoid anti-reflux medicines entirely, it’s something we need to be cognizant of and look out for in our hospitalized patients.”
One study limitation was its inclusion of only inpatient or ED encounters and, therefore, omission of those treated at home; this confers bias toward those with more aggressive disease, according to the authors.
The authors reported no grant support or funding sources for this study. One author declared grant support and consultant fees from several companies, including some medical and pharmaceutical companies, which were unrelated to this research. Dr. Patil reported no disclosures.
This article was updated Aug. 26, 2022.
FROM GASTRO HEP ADVANCES
Pfizer seeks approval for updated COVID booster
Pfizer has sent an application to the Food and Drug Administration for emergency use authorization of its updated COVID-19 booster vaccine for the fall of 2022, the company announced on Aug. 22.
The vaccine, which is adapted for the BA.4 and BA.5 Omicron variants, would be meant for ages 12 and older. If authorized by the FDA, the doses could ship as soon as September.
“Having rapidly scaled up production, we are positioned to immediately begin distribution of the bivalent Omicron BA.4/BA.5 boosters, if authorized, to help protect individuals and families as we prepare for potential fall and winter surges,” Albert Bourla, PhD, Pfizer’s chairman and CEO, said in the statement.
Earlier this year, the FDA ordered vaccine makers such as Pfizer and Moderna to update their shots to target BA.4 and BA.5, which are better at escaping immunity from earlier vaccines and previous infections.
The United States has a contract to buy 105 million of the Pfizer doses and 66 million of the Moderna doses, according to The Associated Press. Moderna is expected to file its FDA application soon as well.
The new shots target both the original spike protein on the coronavirus and the spike mutations carried by BA.4 and BA.5. For now, BA.5 is causing 89% of new infections in the United States, followed by BA.4.6 with 6.3% and BA.4 with 4.3%, according to the latest Centers for Disease Control and Prevention data.
There’s no way to tell if BA.5 will still be the dominant strain this winter or if new variant will replace it, the AP reported. But public health officials have supported the updated boosters as a way to target the most recent strains and increase immunity again.
On Aug. 15, Great Britain became the first country to authorize another one of Moderna’s updated vaccines, which adds protection against BA.1, or the original Omicron strain that became dominant in the winter of 2021-2022. European regulators are considering this shot, the AP reported, but the United States opted not to use this version since new Omicron variants have become dominant.
To approve the latest Pfizer shot, the FDA will rely on scientific testing of prior updates to the vaccine, rather than the newest boosters, to decide whether to fast-track the updated shots for fall, the AP reported. This method is like how flu vaccines are updated each year without large studies that take months.
Previously, Pfizer announced results from a study that found the earlier Omicron update significantly boosted antibodies capable of fighting the BA.1 variant and provided some protection against BA.4 and BA.5. The company’s latest FDA application contains that data and animal testing on the newest booster, the AP reported.
Pfizer will start a trial using the BA.4/BA.5 booster in coming weeks to get more data on how well the latest shot works. Moderna has begun a similar study.
The full results from these studies won’t be available before a fall booster campaign, which is why the FDA and public health officials have called for an updated shot to be ready for distribution in September.
“It’s clear that none of these vaccines are going to completely prevent infection,” Rachel Presti, MD, a researcher with the Moderna trial and an infectious diseases specialist at Washington University in St. Louis, told the AP.
But previous studies of variant booster candidates have shown that “you still get a broader immune response giving a variant booster than giving the same booster,” she said.
A version of this article first appeared on WebMD.com.
Pfizer has sent an application to the Food and Drug Administration for emergency use authorization of its updated COVID-19 booster vaccine for the fall of 2022, the company announced on Aug. 22.
The vaccine, which is adapted for the BA.4 and BA.5 Omicron variants, would be meant for ages 12 and older. If authorized by the FDA, the doses could ship as soon as September.
“Having rapidly scaled up production, we are positioned to immediately begin distribution of the bivalent Omicron BA.4/BA.5 boosters, if authorized, to help protect individuals and families as we prepare for potential fall and winter surges,” Albert Bourla, PhD, Pfizer’s chairman and CEO, said in the statement.
Earlier this year, the FDA ordered vaccine makers such as Pfizer and Moderna to update their shots to target BA.4 and BA.5, which are better at escaping immunity from earlier vaccines and previous infections.
The United States has a contract to buy 105 million of the Pfizer doses and 66 million of the Moderna doses, according to The Associated Press. Moderna is expected to file its FDA application soon as well.
The new shots target both the original spike protein on the coronavirus and the spike mutations carried by BA.4 and BA.5. For now, BA.5 is causing 89% of new infections in the United States, followed by BA.4.6 with 6.3% and BA.4 with 4.3%, according to the latest Centers for Disease Control and Prevention data.
There’s no way to tell if BA.5 will still be the dominant strain this winter or if new variant will replace it, the AP reported. But public health officials have supported the updated boosters as a way to target the most recent strains and increase immunity again.
On Aug. 15, Great Britain became the first country to authorize another one of Moderna’s updated vaccines, which adds protection against BA.1, or the original Omicron strain that became dominant in the winter of 2021-2022. European regulators are considering this shot, the AP reported, but the United States opted not to use this version since new Omicron variants have become dominant.
To approve the latest Pfizer shot, the FDA will rely on scientific testing of prior updates to the vaccine, rather than the newest boosters, to decide whether to fast-track the updated shots for fall, the AP reported. This method is like how flu vaccines are updated each year without large studies that take months.
Previously, Pfizer announced results from a study that found the earlier Omicron update significantly boosted antibodies capable of fighting the BA.1 variant and provided some protection against BA.4 and BA.5. The company’s latest FDA application contains that data and animal testing on the newest booster, the AP reported.
Pfizer will start a trial using the BA.4/BA.5 booster in coming weeks to get more data on how well the latest shot works. Moderna has begun a similar study.
The full results from these studies won’t be available before a fall booster campaign, which is why the FDA and public health officials have called for an updated shot to be ready for distribution in September.
“It’s clear that none of these vaccines are going to completely prevent infection,” Rachel Presti, MD, a researcher with the Moderna trial and an infectious diseases specialist at Washington University in St. Louis, told the AP.
But previous studies of variant booster candidates have shown that “you still get a broader immune response giving a variant booster than giving the same booster,” she said.
A version of this article first appeared on WebMD.com.
Pfizer has sent an application to the Food and Drug Administration for emergency use authorization of its updated COVID-19 booster vaccine for the fall of 2022, the company announced on Aug. 22.
The vaccine, which is adapted for the BA.4 and BA.5 Omicron variants, would be meant for ages 12 and older. If authorized by the FDA, the doses could ship as soon as September.
“Having rapidly scaled up production, we are positioned to immediately begin distribution of the bivalent Omicron BA.4/BA.5 boosters, if authorized, to help protect individuals and families as we prepare for potential fall and winter surges,” Albert Bourla, PhD, Pfizer’s chairman and CEO, said in the statement.
Earlier this year, the FDA ordered vaccine makers such as Pfizer and Moderna to update their shots to target BA.4 and BA.5, which are better at escaping immunity from earlier vaccines and previous infections.
The United States has a contract to buy 105 million of the Pfizer doses and 66 million of the Moderna doses, according to The Associated Press. Moderna is expected to file its FDA application soon as well.
The new shots target both the original spike protein on the coronavirus and the spike mutations carried by BA.4 and BA.5. For now, BA.5 is causing 89% of new infections in the United States, followed by BA.4.6 with 6.3% and BA.4 with 4.3%, according to the latest Centers for Disease Control and Prevention data.
There’s no way to tell if BA.5 will still be the dominant strain this winter or if new variant will replace it, the AP reported. But public health officials have supported the updated boosters as a way to target the most recent strains and increase immunity again.
On Aug. 15, Great Britain became the first country to authorize another one of Moderna’s updated vaccines, which adds protection against BA.1, or the original Omicron strain that became dominant in the winter of 2021-2022. European regulators are considering this shot, the AP reported, but the United States opted not to use this version since new Omicron variants have become dominant.
To approve the latest Pfizer shot, the FDA will rely on scientific testing of prior updates to the vaccine, rather than the newest boosters, to decide whether to fast-track the updated shots for fall, the AP reported. This method is like how flu vaccines are updated each year without large studies that take months.
Previously, Pfizer announced results from a study that found the earlier Omicron update significantly boosted antibodies capable of fighting the BA.1 variant and provided some protection against BA.4 and BA.5. The company’s latest FDA application contains that data and animal testing on the newest booster, the AP reported.
Pfizer will start a trial using the BA.4/BA.5 booster in coming weeks to get more data on how well the latest shot works. Moderna has begun a similar study.
The full results from these studies won’t be available before a fall booster campaign, which is why the FDA and public health officials have called for an updated shot to be ready for distribution in September.
“It’s clear that none of these vaccines are going to completely prevent infection,” Rachel Presti, MD, a researcher with the Moderna trial and an infectious diseases specialist at Washington University in St. Louis, told the AP.
But previous studies of variant booster candidates have shown that “you still get a broader immune response giving a variant booster than giving the same booster,” she said.
A version of this article first appeared on WebMD.com.
Siblings of children with chronic health conditions may have increased mental health risks
Siblings of children with chronic health conditions could be at an increased risk for depression, according to a new report.
In a systematic review of 34 studies, siblings of children with chronic health conditions had significantly higher scores on depressive rating scales than individuals without a sibling with a chronic health condition (standardized mean difference = 0.53; P < .001). Findings related to other clinical health outcomes, such as physical health conditions or mortality, were inconsistent.
“We’ve known for a long time that siblings of kids with chronic conditions undergo stress, and there have been conflicting data on how that stress is manifested in terms of their own health,” senior study author Eyal Cohen, MD, program head for child health evaluative sciences at the Hospital for Sick Children, Toronto, told this news organization.
“For some siblings, having the experience of being raised with a child with a chronic condition may be an asset and build resiliency, while other siblings may feel strong negative emotions, such as sadness, anger, and fear,” he said. “Although we know that this experience is stressful for many siblings, it is important to know whether it changes their health outcomes, so that appropriate support can be put in place for those who need it.”
The study was published online in the Journal of Pediatrics.
Risk for psychological challenges
About a quarter of children in the United States have a mental, emotional, developmental, or behavioral condition, and more than a third have at least one current or lifelong health condition, the study authors write. A childhood chronic health condition can affect family members through worse mental health outcomes, increased stress, and poorer health-related quality of life.
Dr. Cohen and colleagues conducted a systematic review and meta-analysis to assess the clinical mental and physical health outcomes of siblings of children with chronic health conditions in comparison with siblings of healthy children or normative data.
The research team included English-language studies that reported on clinically diagnosable mental or physical health outcomes among siblings of persons younger than 18 years who had a chronic health condition. They included a comparison group and used an experimental or observational design for their study. The researchers analyzed 34 studies, including 28 that reported on mental health, 3 that reported on physical health, and 3 that reported on mortality.
Overall, siblings of children with chronic health conditions had significantly higher scores on depression rating scales than their comparison groups. Siblings’ anxiety scores weren’t substantially higher, however (standard mean difference = 0.21; P = .07).
The effects for confirmed psychiatric diagnoses, physical health outcomes, and mortality could not be included in the meta-analysis, owing to the limited number of studies and the high level of heterogeneity among the studies.
Dr. Cohen noted that although the researchers weren’t surprised that siblings may be at increased risk of mental health challenges, they were surprised by the limited data regarding physical health.
“At a minimum, our findings support the importance of asking open-ended questions about how a family is doing during clinical encounters,” he said. “These siblings may also benefit from programs such as support groups or summer camps, which have been shown to improve mental health and behavioral outcomes in siblings of children with chronic health conditions, such as cancer and neurodevelopmental disabilities.”
Future studies should assess the specific risk factors for mental health problems in siblings of children with chronic health conditions, Dr. Cohen said. Additional research could also investigate the design and effectiveness of interventions that address these concerns.
Message of inclusiveness
“The message that resonates with me is about the interventions and resources needed to support siblings,” Linda Nguyen, a doctoral student in rehabilitation science and researcher with the CanChild Center for Childhood Disability Research at McMaster University in Hamilton, Ont., told this news organization.
Ms. Nguyen, who wasn’t involved with this study, has researched the resources available to siblings in Canada and has found a lack of support options, particularly when it comes to specific health care management roles.
“Consistently throughout my research, I’ve seen the need for resources that go beyond a focus on siblings’ well-being and instead support them in their different roles,” she said. “Some want to be friends, mentors, supporters, and caregivers for their siblings in the future.”
Siblings often adopt different roles as they form their own identity, Ms. Nguyen noted, which becomes a larger part of the health care conversation as children with chronic conditions make the transition from pediatric to adult health care. Siblings want to be asked how they’d like to be involved, she said. Some would like to be involved with health care appointments, the chronic condition community, research, and policy making.
“At the societal level and public level, there’s also a message of inclusiveness and making sure that we’re welcoming youth with disabilities and chronic conditions,” Jan Willem Gorter, MD, PhD, a professor of pediatrics and scientist for CanChild at McMaster University, told this news organization.
Dr. Gorter, who also was not involved with this study, noted that children with chronic conditions often feel left behind, which can influence the involvement of their siblings as well.
“There are a lot of places in the world where children with disabilities go to special schools, and they spend a lot of time in a different world, with different experiences than their siblings,” he said. “At the public health level, we want to advocate for an inclusive society and support the whole family, which benefits everybody.”
The study was funded by the Canadian Institutes of Health Research and the CHILD-BRIGHT Network summer studentship, which is supported by the Canadian Institute for Health Research Strategy for Patient-Oriented Research. Dr. Cohen, Ms. Nguyen, and Dr. Gorter have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Siblings of children with chronic health conditions could be at an increased risk for depression, according to a new report.
In a systematic review of 34 studies, siblings of children with chronic health conditions had significantly higher scores on depressive rating scales than individuals without a sibling with a chronic health condition (standardized mean difference = 0.53; P < .001). Findings related to other clinical health outcomes, such as physical health conditions or mortality, were inconsistent.
“We’ve known for a long time that siblings of kids with chronic conditions undergo stress, and there have been conflicting data on how that stress is manifested in terms of their own health,” senior study author Eyal Cohen, MD, program head for child health evaluative sciences at the Hospital for Sick Children, Toronto, told this news organization.
“For some siblings, having the experience of being raised with a child with a chronic condition may be an asset and build resiliency, while other siblings may feel strong negative emotions, such as sadness, anger, and fear,” he said. “Although we know that this experience is stressful for many siblings, it is important to know whether it changes their health outcomes, so that appropriate support can be put in place for those who need it.”
The study was published online in the Journal of Pediatrics.
Risk for psychological challenges
About a quarter of children in the United States have a mental, emotional, developmental, or behavioral condition, and more than a third have at least one current or lifelong health condition, the study authors write. A childhood chronic health condition can affect family members through worse mental health outcomes, increased stress, and poorer health-related quality of life.
Dr. Cohen and colleagues conducted a systematic review and meta-analysis to assess the clinical mental and physical health outcomes of siblings of children with chronic health conditions in comparison with siblings of healthy children or normative data.
The research team included English-language studies that reported on clinically diagnosable mental or physical health outcomes among siblings of persons younger than 18 years who had a chronic health condition. They included a comparison group and used an experimental or observational design for their study. The researchers analyzed 34 studies, including 28 that reported on mental health, 3 that reported on physical health, and 3 that reported on mortality.
Overall, siblings of children with chronic health conditions had significantly higher scores on depression rating scales than their comparison groups. Siblings’ anxiety scores weren’t substantially higher, however (standard mean difference = 0.21; P = .07).
The effects for confirmed psychiatric diagnoses, physical health outcomes, and mortality could not be included in the meta-analysis, owing to the limited number of studies and the high level of heterogeneity among the studies.
Dr. Cohen noted that although the researchers weren’t surprised that siblings may be at increased risk of mental health challenges, they were surprised by the limited data regarding physical health.
“At a minimum, our findings support the importance of asking open-ended questions about how a family is doing during clinical encounters,” he said. “These siblings may also benefit from programs such as support groups or summer camps, which have been shown to improve mental health and behavioral outcomes in siblings of children with chronic health conditions, such as cancer and neurodevelopmental disabilities.”
Future studies should assess the specific risk factors for mental health problems in siblings of children with chronic health conditions, Dr. Cohen said. Additional research could also investigate the design and effectiveness of interventions that address these concerns.
Message of inclusiveness
“The message that resonates with me is about the interventions and resources needed to support siblings,” Linda Nguyen, a doctoral student in rehabilitation science and researcher with the CanChild Center for Childhood Disability Research at McMaster University in Hamilton, Ont., told this news organization.
Ms. Nguyen, who wasn’t involved with this study, has researched the resources available to siblings in Canada and has found a lack of support options, particularly when it comes to specific health care management roles.
“Consistently throughout my research, I’ve seen the need for resources that go beyond a focus on siblings’ well-being and instead support them in their different roles,” she said. “Some want to be friends, mentors, supporters, and caregivers for their siblings in the future.”
Siblings often adopt different roles as they form their own identity, Ms. Nguyen noted, which becomes a larger part of the health care conversation as children with chronic conditions make the transition from pediatric to adult health care. Siblings want to be asked how they’d like to be involved, she said. Some would like to be involved with health care appointments, the chronic condition community, research, and policy making.
“At the societal level and public level, there’s also a message of inclusiveness and making sure that we’re welcoming youth with disabilities and chronic conditions,” Jan Willem Gorter, MD, PhD, a professor of pediatrics and scientist for CanChild at McMaster University, told this news organization.
Dr. Gorter, who also was not involved with this study, noted that children with chronic conditions often feel left behind, which can influence the involvement of their siblings as well.
“There are a lot of places in the world where children with disabilities go to special schools, and they spend a lot of time in a different world, with different experiences than their siblings,” he said. “At the public health level, we want to advocate for an inclusive society and support the whole family, which benefits everybody.”
The study was funded by the Canadian Institutes of Health Research and the CHILD-BRIGHT Network summer studentship, which is supported by the Canadian Institute for Health Research Strategy for Patient-Oriented Research. Dr. Cohen, Ms. Nguyen, and Dr. Gorter have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Siblings of children with chronic health conditions could be at an increased risk for depression, according to a new report.
In a systematic review of 34 studies, siblings of children with chronic health conditions had significantly higher scores on depressive rating scales than individuals without a sibling with a chronic health condition (standardized mean difference = 0.53; P < .001). Findings related to other clinical health outcomes, such as physical health conditions or mortality, were inconsistent.
“We’ve known for a long time that siblings of kids with chronic conditions undergo stress, and there have been conflicting data on how that stress is manifested in terms of their own health,” senior study author Eyal Cohen, MD, program head for child health evaluative sciences at the Hospital for Sick Children, Toronto, told this news organization.
“For some siblings, having the experience of being raised with a child with a chronic condition may be an asset and build resiliency, while other siblings may feel strong negative emotions, such as sadness, anger, and fear,” he said. “Although we know that this experience is stressful for many siblings, it is important to know whether it changes their health outcomes, so that appropriate support can be put in place for those who need it.”
The study was published online in the Journal of Pediatrics.
Risk for psychological challenges
About a quarter of children in the United States have a mental, emotional, developmental, or behavioral condition, and more than a third have at least one current or lifelong health condition, the study authors write. A childhood chronic health condition can affect family members through worse mental health outcomes, increased stress, and poorer health-related quality of life.
Dr. Cohen and colleagues conducted a systematic review and meta-analysis to assess the clinical mental and physical health outcomes of siblings of children with chronic health conditions in comparison with siblings of healthy children or normative data.
The research team included English-language studies that reported on clinically diagnosable mental or physical health outcomes among siblings of persons younger than 18 years who had a chronic health condition. They included a comparison group and used an experimental or observational design for their study. The researchers analyzed 34 studies, including 28 that reported on mental health, 3 that reported on physical health, and 3 that reported on mortality.
Overall, siblings of children with chronic health conditions had significantly higher scores on depression rating scales than their comparison groups. Siblings’ anxiety scores weren’t substantially higher, however (standard mean difference = 0.21; P = .07).
The effects for confirmed psychiatric diagnoses, physical health outcomes, and mortality could not be included in the meta-analysis, owing to the limited number of studies and the high level of heterogeneity among the studies.
Dr. Cohen noted that although the researchers weren’t surprised that siblings may be at increased risk of mental health challenges, they were surprised by the limited data regarding physical health.
“At a minimum, our findings support the importance of asking open-ended questions about how a family is doing during clinical encounters,” he said. “These siblings may also benefit from programs such as support groups or summer camps, which have been shown to improve mental health and behavioral outcomes in siblings of children with chronic health conditions, such as cancer and neurodevelopmental disabilities.”
Future studies should assess the specific risk factors for mental health problems in siblings of children with chronic health conditions, Dr. Cohen said. Additional research could also investigate the design and effectiveness of interventions that address these concerns.
Message of inclusiveness
“The message that resonates with me is about the interventions and resources needed to support siblings,” Linda Nguyen, a doctoral student in rehabilitation science and researcher with the CanChild Center for Childhood Disability Research at McMaster University in Hamilton, Ont., told this news organization.
Ms. Nguyen, who wasn’t involved with this study, has researched the resources available to siblings in Canada and has found a lack of support options, particularly when it comes to specific health care management roles.
“Consistently throughout my research, I’ve seen the need for resources that go beyond a focus on siblings’ well-being and instead support them in their different roles,” she said. “Some want to be friends, mentors, supporters, and caregivers for their siblings in the future.”
Siblings often adopt different roles as they form their own identity, Ms. Nguyen noted, which becomes a larger part of the health care conversation as children with chronic conditions make the transition from pediatric to adult health care. Siblings want to be asked how they’d like to be involved, she said. Some would like to be involved with health care appointments, the chronic condition community, research, and policy making.
“At the societal level and public level, there’s also a message of inclusiveness and making sure that we’re welcoming youth with disabilities and chronic conditions,” Jan Willem Gorter, MD, PhD, a professor of pediatrics and scientist for CanChild at McMaster University, told this news organization.
Dr. Gorter, who also was not involved with this study, noted that children with chronic conditions often feel left behind, which can influence the involvement of their siblings as well.
“There are a lot of places in the world where children with disabilities go to special schools, and they spend a lot of time in a different world, with different experiences than their siblings,” he said. “At the public health level, we want to advocate for an inclusive society and support the whole family, which benefits everybody.”
The study was funded by the Canadian Institutes of Health Research and the CHILD-BRIGHT Network summer studentship, which is supported by the Canadian Institute for Health Research Strategy for Patient-Oriented Research. Dr. Cohen, Ms. Nguyen, and Dr. Gorter have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM JOURNAL OF PEDIATRICS
Real-world study shows subcutaneous vedolizumab effective for maintenance in IBD
Switching from intravenous to subcutaneous vedolizumab for maintenance treatment of inflammatory bowel diseases appears to be effective, according to a study providing real-world data.
Subcutaneous treatment could reduce direct health care costs because no infusion equipment is necessary, as well as societal costs because patients don’t need to take time off work or travel to infusion locations, wrote the researchers, led by Adriaan Volkers, MD, a doctoral candidate in gastroenterology and hepatology at the Amsterdam Gastroenterology Endocrinology Metabolism Research Institute at the University of Amsterdam in The Netherlands.
“The option of a SC formulation of VDZ [vedolizumab] offers patients a choice regarding the route of administration,” they wrote. The study was published in Alimentary Pharmacology and Therapeutics.
Dr. Volkers and colleagues assessed the effectiveness, safety, drug discontinuation, and pharmacokinetics of a switch from intravenous to subcutaneous maintenance vedolizumab in a prospective real-world cohort of patients from two separate studies in The Netherlands between July 2020 and November 2021.
The cohort comprised 135 adults who had greater than 4 months of IV vedolizumab: 82 patients with Crohn’s disease and 53 with ulcerative colitis. Prospective follow-up took place during scheduled outpatient clinic visits at weeks 12 and 24 after switching administration. Patients received 108 mg of subcutaneous vedolizumab once every 2 weeks.
Overall, 16 patients (11.9%) discontinued subcutaneous administration, including 11 patients (13.4%) with Crohn’s disease who stopped after a median of 18 weeks, as well as 5 patients (9.4%) with ulcerative colitis who stopped after a median of 6 weeks. Four patients, who all had Crohn’s disease, discontinued vedolizumab and switched to a different treatment because of loss of response. Nine patients switched back to IV administration because of adverse events, and three switched back because of fear of needles.
In total, there were 59 adverse events and 13 infections that were possibly or probably related to subcutaneous injection among 42 patients. The most common adverse events that were probably related were injection site reactions such as pain or swelling, reported among 15 patients, and headaches, reported among 6 patients.
At the initiation of therapy, 57 of 81 Crohn’s disease patients (70.4%) were in corticosteroid-free clinical remission and 53 of 80 (66.3%) were in biochemical remission, which was defined as C-reactive protein levels of 5 mg/L or less and fecal calprotectin levels of 250 mcg/g or less. For ulcerative colitis patients, 35 of 49 (71.4%) were in corticosteroid-free clinical remission and 41 of 51 (80.4%) were in biochemical remission. Median clinical and biochemical disease levels remained stable after the switch to subcutaneous treatment and weren’t significantly different, compared with baseline measurements.
Median vedolizumab serum concentrations increased from 19 mcg/mL at the time of the switch to 31 mcg/mL at 12 weeks after the switch and 37 mcg/mL at 24 weeks. Serum concentrations of less than 25 mcg/mL were associated with lower rates of corticosteroid-free clinical remission, and serum concentrations of greater than 40 mcg/mL were associated with higher biochemical remission rates.
Importantly, there was no association between vedolizumab serum concentrations and the risk of adverse events that were deemed probably related to subcutaneous injection or infections.
“The most important point to understand here is that SC VDZ can be used to maintain clinical remission after IV VDZ induction in a real-world setting,” said Brian DeBosch, MD, PhD, associate professor of cell biology and physiology at Washington University, St. Louis.
Dr. DeBosch, who wasn’t involved with this study, noted that previous data have indicated that switching from intravenous to subcutaneous treatment after a 6-week induction is superior to placebo in maintaining clinical and biochemical remission. However, studies haven’t quantified the optimal timing and therapeutic efficacy of switching.
“This is critical to quantify because SC VDZ has slower and lower peak bioavailability when compared with IV administration,” he said. “These data indicate that IV induction overcomes the known pharmacokinetic limitations of SC VDZ during the induction phase.”
However, there are still some limitations and areas for future research around switching administration, Dr. DeBosch noted.
“A key comparison lacking in the study is the mean and trough serum VDZ, and proportion of patients with relapsing disease in patients on continued IV VDZ,” he said. “Yet, these data nevertheless indicate that tandem IV-SC drug administration can maximize the induction and maintenance of remission in IBD, while also mitigating some of the barriers associated with long-term, continued IV VDZ administration.”
The study authors reported advisory fees and speaker fees from several pharmaceutical companies, and some authors have received funding or served on advisory boards for Takeda Pharmaceuticals, which manufactures vedolizumab. Dr. DeBosch reported no relevant disclosures.
Switching from intravenous to subcutaneous vedolizumab for maintenance treatment of inflammatory bowel diseases appears to be effective, according to a study providing real-world data.
Subcutaneous treatment could reduce direct health care costs because no infusion equipment is necessary, as well as societal costs because patients don’t need to take time off work or travel to infusion locations, wrote the researchers, led by Adriaan Volkers, MD, a doctoral candidate in gastroenterology and hepatology at the Amsterdam Gastroenterology Endocrinology Metabolism Research Institute at the University of Amsterdam in The Netherlands.
“The option of a SC formulation of VDZ [vedolizumab] offers patients a choice regarding the route of administration,” they wrote. The study was published in Alimentary Pharmacology and Therapeutics.
Dr. Volkers and colleagues assessed the effectiveness, safety, drug discontinuation, and pharmacokinetics of a switch from intravenous to subcutaneous maintenance vedolizumab in a prospective real-world cohort of patients from two separate studies in The Netherlands between July 2020 and November 2021.
The cohort comprised 135 adults who had greater than 4 months of IV vedolizumab: 82 patients with Crohn’s disease and 53 with ulcerative colitis. Prospective follow-up took place during scheduled outpatient clinic visits at weeks 12 and 24 after switching administration. Patients received 108 mg of subcutaneous vedolizumab once every 2 weeks.
Overall, 16 patients (11.9%) discontinued subcutaneous administration, including 11 patients (13.4%) with Crohn’s disease who stopped after a median of 18 weeks, as well as 5 patients (9.4%) with ulcerative colitis who stopped after a median of 6 weeks. Four patients, who all had Crohn’s disease, discontinued vedolizumab and switched to a different treatment because of loss of response. Nine patients switched back to IV administration because of adverse events, and three switched back because of fear of needles.
In total, there were 59 adverse events and 13 infections that were possibly or probably related to subcutaneous injection among 42 patients. The most common adverse events that were probably related were injection site reactions such as pain or swelling, reported among 15 patients, and headaches, reported among 6 patients.
At the initiation of therapy, 57 of 81 Crohn’s disease patients (70.4%) were in corticosteroid-free clinical remission and 53 of 80 (66.3%) were in biochemical remission, which was defined as C-reactive protein levels of 5 mg/L or less and fecal calprotectin levels of 250 mcg/g or less. For ulcerative colitis patients, 35 of 49 (71.4%) were in corticosteroid-free clinical remission and 41 of 51 (80.4%) were in biochemical remission. Median clinical and biochemical disease levels remained stable after the switch to subcutaneous treatment and weren’t significantly different, compared with baseline measurements.
Median vedolizumab serum concentrations increased from 19 mcg/mL at the time of the switch to 31 mcg/mL at 12 weeks after the switch and 37 mcg/mL at 24 weeks. Serum concentrations of less than 25 mcg/mL were associated with lower rates of corticosteroid-free clinical remission, and serum concentrations of greater than 40 mcg/mL were associated with higher biochemical remission rates.
Importantly, there was no association between vedolizumab serum concentrations and the risk of adverse events that were deemed probably related to subcutaneous injection or infections.
“The most important point to understand here is that SC VDZ can be used to maintain clinical remission after IV VDZ induction in a real-world setting,” said Brian DeBosch, MD, PhD, associate professor of cell biology and physiology at Washington University, St. Louis.
Dr. DeBosch, who wasn’t involved with this study, noted that previous data have indicated that switching from intravenous to subcutaneous treatment after a 6-week induction is superior to placebo in maintaining clinical and biochemical remission. However, studies haven’t quantified the optimal timing and therapeutic efficacy of switching.
“This is critical to quantify because SC VDZ has slower and lower peak bioavailability when compared with IV administration,” he said. “These data indicate that IV induction overcomes the known pharmacokinetic limitations of SC VDZ during the induction phase.”
However, there are still some limitations and areas for future research around switching administration, Dr. DeBosch noted.
“A key comparison lacking in the study is the mean and trough serum VDZ, and proportion of patients with relapsing disease in patients on continued IV VDZ,” he said. “Yet, these data nevertheless indicate that tandem IV-SC drug administration can maximize the induction and maintenance of remission in IBD, while also mitigating some of the barriers associated with long-term, continued IV VDZ administration.”
The study authors reported advisory fees and speaker fees from several pharmaceutical companies, and some authors have received funding or served on advisory boards for Takeda Pharmaceuticals, which manufactures vedolizumab. Dr. DeBosch reported no relevant disclosures.
Switching from intravenous to subcutaneous vedolizumab for maintenance treatment of inflammatory bowel diseases appears to be effective, according to a study providing real-world data.
Subcutaneous treatment could reduce direct health care costs because no infusion equipment is necessary, as well as societal costs because patients don’t need to take time off work or travel to infusion locations, wrote the researchers, led by Adriaan Volkers, MD, a doctoral candidate in gastroenterology and hepatology at the Amsterdam Gastroenterology Endocrinology Metabolism Research Institute at the University of Amsterdam in The Netherlands.
“The option of a SC formulation of VDZ [vedolizumab] offers patients a choice regarding the route of administration,” they wrote. The study was published in Alimentary Pharmacology and Therapeutics.
Dr. Volkers and colleagues assessed the effectiveness, safety, drug discontinuation, and pharmacokinetics of a switch from intravenous to subcutaneous maintenance vedolizumab in a prospective real-world cohort of patients from two separate studies in The Netherlands between July 2020 and November 2021.
The cohort comprised 135 adults who had greater than 4 months of IV vedolizumab: 82 patients with Crohn’s disease and 53 with ulcerative colitis. Prospective follow-up took place during scheduled outpatient clinic visits at weeks 12 and 24 after switching administration. Patients received 108 mg of subcutaneous vedolizumab once every 2 weeks.
Overall, 16 patients (11.9%) discontinued subcutaneous administration, including 11 patients (13.4%) with Crohn’s disease who stopped after a median of 18 weeks, as well as 5 patients (9.4%) with ulcerative colitis who stopped after a median of 6 weeks. Four patients, who all had Crohn’s disease, discontinued vedolizumab and switched to a different treatment because of loss of response. Nine patients switched back to IV administration because of adverse events, and three switched back because of fear of needles.
In total, there were 59 adverse events and 13 infections that were possibly or probably related to subcutaneous injection among 42 patients. The most common adverse events that were probably related were injection site reactions such as pain or swelling, reported among 15 patients, and headaches, reported among 6 patients.
At the initiation of therapy, 57 of 81 Crohn’s disease patients (70.4%) were in corticosteroid-free clinical remission and 53 of 80 (66.3%) were in biochemical remission, which was defined as C-reactive protein levels of 5 mg/L or less and fecal calprotectin levels of 250 mcg/g or less. For ulcerative colitis patients, 35 of 49 (71.4%) were in corticosteroid-free clinical remission and 41 of 51 (80.4%) were in biochemical remission. Median clinical and biochemical disease levels remained stable after the switch to subcutaneous treatment and weren’t significantly different, compared with baseline measurements.
Median vedolizumab serum concentrations increased from 19 mcg/mL at the time of the switch to 31 mcg/mL at 12 weeks after the switch and 37 mcg/mL at 24 weeks. Serum concentrations of less than 25 mcg/mL were associated with lower rates of corticosteroid-free clinical remission, and serum concentrations of greater than 40 mcg/mL were associated with higher biochemical remission rates.
Importantly, there was no association between vedolizumab serum concentrations and the risk of adverse events that were deemed probably related to subcutaneous injection or infections.
“The most important point to understand here is that SC VDZ can be used to maintain clinical remission after IV VDZ induction in a real-world setting,” said Brian DeBosch, MD, PhD, associate professor of cell biology and physiology at Washington University, St. Louis.
Dr. DeBosch, who wasn’t involved with this study, noted that previous data have indicated that switching from intravenous to subcutaneous treatment after a 6-week induction is superior to placebo in maintaining clinical and biochemical remission. However, studies haven’t quantified the optimal timing and therapeutic efficacy of switching.
“This is critical to quantify because SC VDZ has slower and lower peak bioavailability when compared with IV administration,” he said. “These data indicate that IV induction overcomes the known pharmacokinetic limitations of SC VDZ during the induction phase.”
However, there are still some limitations and areas for future research around switching administration, Dr. DeBosch noted.
“A key comparison lacking in the study is the mean and trough serum VDZ, and proportion of patients with relapsing disease in patients on continued IV VDZ,” he said. “Yet, these data nevertheless indicate that tandem IV-SC drug administration can maximize the induction and maintenance of remission in IBD, while also mitigating some of the barriers associated with long-term, continued IV VDZ administration.”
The study authors reported advisory fees and speaker fees from several pharmaceutical companies, and some authors have received funding or served on advisory boards for Takeda Pharmaceuticals, which manufactures vedolizumab. Dr. DeBosch reported no relevant disclosures.
FROM ALIMENTARY PHARMACOLOGY & THERAPEUTICS
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
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