GI and Hepatology News

Maria T. Abreu, MD, AGAF, has been inducted as the 119th president of the AGA Institute. She currently serves as the Martin Kalser Endowed Chair of Gastroenterology; professor of medicine, microbiology, and immunology; and director of the Crohn’s and Colitis Center at the University of Miami. Dr. Abreu is the fifth woman to lead AGA as president.

Born in New York and raised in New Jersey, Dr. Abreu grew up surrounded by a strong, tight-knit Cuban community. Her family moved to Miami when she was in the ninth grade. She later entered the 6-year medical program at the University of Miami, which was the beginning of her unparalleled academic and professional excellence in medicine.

Abreu_Maria_T_FLA_2023_web.jpg

Dr. Abreu is a leader in inflammatory bowel disease patient care, and she was honored by the prestigious Sherman Prize in 2019. Her service to AGA is lengthy and begins when she took on the role of fellow representative for the research grant committee. She has since sat on both the government advocacy and diversity committees. She also served as the chair of the Immunology, Microbiology and Inflammatory Bowel Diseases Section of the AGA Council, and later as chair of the full AGA Council. While chair she developed a more streamlined in-person planning committee meeting to better organize DDW.

When asked about goals for her presidency, Dr. Abreu wants to make DDW a better experience for the modern gastroenterologist. This includes finding that perfect balance between digesting the latest education and science with networking and socializing. She plans to collaborate with the presidents of the other societies to make this come to fruition.

Perhaps the area that Dr. Abreu is most passionate about is welcoming and fostering the growth of women in gastroenterology. She wants to support women who want to succeed in academics and in practice, who want ergonomics to match their work needs, and who want to have families.

“Maria is the ultimate ‘triple threat’: master scientist, master clinician, and devoted mentor. She has not only been a major player advancing knowledge in IBD, but also motivating and pushing others to develop successful careers,” said Andres Yarur, MD, AGAF, associate professor of medicine at Cedars-Sinai Medical Center. “Her work, brilliance, passion, and charm inspire all of us and will continue to inspire many generations to come.”

Maria T. Abreu, MD, AGAF, has been inducted as the 119th president of the AGA Institute. She currently serves as the Martin Kalser Endowed Chair of Gastroenterology; professor of medicine, microbiology, and immunology; and director of the Crohn’s and Colitis Center at the University of Miami. Dr. Abreu is the fifth woman to lead AGA as president.

Born in New York and raised in New Jersey, Dr. Abreu grew up surrounded by a strong, tight-knit Cuban community. Her family moved to Miami when she was in the ninth grade. She later entered the 6-year medical program at the University of Miami, which was the beginning of her unparalleled academic and professional excellence in medicine.

Abreu_Maria_T_FLA_2023_web.jpg

Dr. Abreu is a leader in inflammatory bowel disease patient care, and she was honored by the prestigious Sherman Prize in 2019. Her service to AGA is lengthy and begins when she took on the role of fellow representative for the research grant committee. She has since sat on both the government advocacy and diversity committees. She also served as the chair of the Immunology, Microbiology and Inflammatory Bowel Diseases Section of the AGA Council, and later as chair of the full AGA Council. While chair she developed a more streamlined in-person planning committee meeting to better organize DDW.

When asked about goals for her presidency, Dr. Abreu wants to make DDW a better experience for the modern gastroenterologist. This includes finding that perfect balance between digesting the latest education and science with networking and socializing. She plans to collaborate with the presidents of the other societies to make this come to fruition.

Perhaps the area that Dr. Abreu is most passionate about is welcoming and fostering the growth of women in gastroenterology. She wants to support women who want to succeed in academics and in practice, who want ergonomics to match their work needs, and who want to have families.

“Maria is the ultimate ‘triple threat’: master scientist, master clinician, and devoted mentor. She has not only been a major player advancing knowledge in IBD, but also motivating and pushing others to develop successful careers,” said Andres Yarur, MD, AGAF, associate professor of medicine at Cedars-Sinai Medical Center. “Her work, brilliance, passion, and charm inspire all of us and will continue to inspire many generations to come.”

Maria T. Abreu, MD, AGAF, has been inducted as the 119th president of the AGA Institute. She currently serves as the Martin Kalser Endowed Chair of Gastroenterology; professor of medicine, microbiology, and immunology; and director of the Crohn’s and Colitis Center at the University of Miami. Dr. Abreu is the fifth woman to lead AGA as president.

Born in New York and raised in New Jersey, Dr. Abreu grew up surrounded by a strong, tight-knit Cuban community. Her family moved to Miami when she was in the ninth grade. She later entered the 6-year medical program at the University of Miami, which was the beginning of her unparalleled academic and professional excellence in medicine.

Abreu_Maria_T_FLA_2023_web.jpg

Dr. Abreu is a leader in inflammatory bowel disease patient care, and she was honored by the prestigious Sherman Prize in 2019. Her service to AGA is lengthy and begins when she took on the role of fellow representative for the research grant committee. She has since sat on both the government advocacy and diversity committees. She also served as the chair of the Immunology, Microbiology and Inflammatory Bowel Diseases Section of the AGA Council, and later as chair of the full AGA Council. While chair she developed a more streamlined in-person planning committee meeting to better organize DDW.

When asked about goals for her presidency, Dr. Abreu wants to make DDW a better experience for the modern gastroenterologist. This includes finding that perfect balance between digesting the latest education and science with networking and socializing. She plans to collaborate with the presidents of the other societies to make this come to fruition.

Perhaps the area that Dr. Abreu is most passionate about is welcoming and fostering the growth of women in gastroenterology. She wants to support women who want to succeed in academics and in practice, who want ergonomics to match their work needs, and who want to have families.

“Maria is the ultimate ‘triple threat’: master scientist, master clinician, and devoted mentor. She has not only been a major player advancing knowledge in IBD, but also motivating and pushing others to develop successful careers,” said Andres Yarur, MD, AGAF, associate professor of medicine at Cedars-Sinai Medical Center. “Her work, brilliance, passion, and charm inspire all of us and will continue to inspire many generations to come.”

Autonomous artificial intelligence (AI) can achieve similar accuracy to AI-assisted humans (AI-H) in the optical diagnosis of diminutive colorectal polyps, while providing greater alignment with pathology-based surveillance intervals, based on a randomized controlled trial.

These findings suggest that autonomous AI may one day replace histologic assessment of diminutive polyps, reported lead author Roupen Djinbachian, MD, of the Montreal University Hospital Research Center, Montreal, Quebec, Canada, and colleagues.Optical diagnosis of diminutive colorectal polyps has been proposed as a cost-effective alternative to histologic diagnosis, but its implementation in general clinical practice has been hindered by endoscopists’ concerns about incorrect diagnoses, the investigators wrote in Gastroenterology.“AI-based systems (CADx) have been proposed as a solution to these barriers to implementation, with studies showing high adherence to Preservation and Incorporation of Valuable Endoscopic Innovations (PIVI) thresholds when using AI-H,” they wrote. “However, the efficacy and safety of autonomous AI-based diagnostic platforms have not yet been evaluated.”

To address this knowledge gap, Dr. Djinbachian and colleagues conducted a randomized controlled noninferiority trial involving 467 patients, all of whom underwent elective colonoscopies at a single academic institution.

Participants were randomly assigned to one of two groups. The first group received an optical diagnosis of diminutive (1-5 mm) colorectal polyps using an autonomous AI-based CADx system without any human input. The second group had diagnoses performed by endoscopists who used AI-H to make their optical diagnoses.

The primary outcome was the accuracy of optical diagnosis compared with the gold standard of histologic evaluation. Secondarily, the investigators explored associations between pathology-based surveillance intervals and various measures of accuracy, including sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV).

The results showed that the accuracy of optical diagnosis for diminutive polyps was similar between the two groups, supporting noninferiority. Autonomous AI achieved an accuracy rate of 77.2%, while the AI-H group had an accuracy of 72.1%, which was not statistically significant (P = .86).

But when it came to pathology-based surveillance intervals, autonomous AI showed a clear advantage; the autonomous AI system achieved a 91.5% agreement rate, compared with 82.1% for the AI-H group (P = .016).

“These findings indicate that autonomous AI not only matches but also surpasses AI-H in accuracy for determining surveillance intervals,” the investigators wrote, noting that this finding highlights the “complexities of human interaction with AI modules where human intervention could lead to worse outcomes.”

Further analysis revealed that the sensitivity of autonomous AI for identifying adenomas was 84.8%, slightly higher than the 83.6% sensitivity of the AI-H group. Specificity was 64.4% for autonomous AI vs 63.8% for AI-H. While PPV was higher in the autonomous AI group (85.6%), compared with the AI-H group (78.6%), NPV was lower for autonomous AI than AI-H (63.0% vs 71.0%).

Dr. Djinbachian and colleagues suggested that future research should focus on larger, multicenter trials to validate these findings and further explore the integration of autonomous AI systems in clinical practice. They also noted that improving AI algorithms to accurately diagnose sessile serrated lesions could enhance the overall effectiveness of AI-based optical diagnosis.

“The performance of autonomous AI in accurately diagnosing diminutive polyps and determining appropriate surveillance intervals suggests that it could play a crucial role in streamlining colorectal cancer screening processes, reducing the burden on pathologists, and potentially lowering healthcare costs,” the investigators concluded.The study was supported by Fujifilm, which had no role in the study design or data analysis. Dr. von Renteln reported additional research funding from Vantage and Fujifilm.

Autonomous artificial intelligence (AI) can achieve similar accuracy to AI-assisted humans (AI-H) in the optical diagnosis of diminutive colorectal polyps, while providing greater alignment with pathology-based surveillance intervals, based on a randomized controlled trial.

These findings suggest that autonomous AI may one day replace histologic assessment of diminutive polyps, reported lead author Roupen Djinbachian, MD, of the Montreal University Hospital Research Center, Montreal, Quebec, Canada, and colleagues.Optical diagnosis of diminutive colorectal polyps has been proposed as a cost-effective alternative to histologic diagnosis, but its implementation in general clinical practice has been hindered by endoscopists’ concerns about incorrect diagnoses, the investigators wrote in Gastroenterology.“AI-based systems (CADx) have been proposed as a solution to these barriers to implementation, with studies showing high adherence to Preservation and Incorporation of Valuable Endoscopic Innovations (PIVI) thresholds when using AI-H,” they wrote. “However, the efficacy and safety of autonomous AI-based diagnostic platforms have not yet been evaluated.”

To address this knowledge gap, Dr. Djinbachian and colleagues conducted a randomized controlled noninferiority trial involving 467 patients, all of whom underwent elective colonoscopies at a single academic institution.

Participants were randomly assigned to one of two groups. The first group received an optical diagnosis of diminutive (1-5 mm) colorectal polyps using an autonomous AI-based CADx system without any human input. The second group had diagnoses performed by endoscopists who used AI-H to make their optical diagnoses.

The primary outcome was the accuracy of optical diagnosis compared with the gold standard of histologic evaluation. Secondarily, the investigators explored associations between pathology-based surveillance intervals and various measures of accuracy, including sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV).

The results showed that the accuracy of optical diagnosis for diminutive polyps was similar between the two groups, supporting noninferiority. Autonomous AI achieved an accuracy rate of 77.2%, while the AI-H group had an accuracy of 72.1%, which was not statistically significant (P = .86).

But when it came to pathology-based surveillance intervals, autonomous AI showed a clear advantage; the autonomous AI system achieved a 91.5% agreement rate, compared with 82.1% for the AI-H group (P = .016).

“These findings indicate that autonomous AI not only matches but also surpasses AI-H in accuracy for determining surveillance intervals,” the investigators wrote, noting that this finding highlights the “complexities of human interaction with AI modules where human intervention could lead to worse outcomes.”

Further analysis revealed that the sensitivity of autonomous AI for identifying adenomas was 84.8%, slightly higher than the 83.6% sensitivity of the AI-H group. Specificity was 64.4% for autonomous AI vs 63.8% for AI-H. While PPV was higher in the autonomous AI group (85.6%), compared with the AI-H group (78.6%), NPV was lower for autonomous AI than AI-H (63.0% vs 71.0%).

Dr. Djinbachian and colleagues suggested that future research should focus on larger, multicenter trials to validate these findings and further explore the integration of autonomous AI systems in clinical practice. They also noted that improving AI algorithms to accurately diagnose sessile serrated lesions could enhance the overall effectiveness of AI-based optical diagnosis.

“The performance of autonomous AI in accurately diagnosing diminutive polyps and determining appropriate surveillance intervals suggests that it could play a crucial role in streamlining colorectal cancer screening processes, reducing the burden on pathologists, and potentially lowering healthcare costs,” the investigators concluded.The study was supported by Fujifilm, which had no role in the study design or data analysis. Dr. von Renteln reported additional research funding from Vantage and Fujifilm.

Autonomous artificial intelligence (AI) can achieve similar accuracy to AI-assisted humans (AI-H) in the optical diagnosis of diminutive colorectal polyps, while providing greater alignment with pathology-based surveillance intervals, based on a randomized controlled trial.

These findings suggest that autonomous AI may one day replace histologic assessment of diminutive polyps, reported lead author Roupen Djinbachian, MD, of the Montreal University Hospital Research Center, Montreal, Quebec, Canada, and colleagues.Optical diagnosis of diminutive colorectal polyps has been proposed as a cost-effective alternative to histologic diagnosis, but its implementation in general clinical practice has been hindered by endoscopists’ concerns about incorrect diagnoses, the investigators wrote in Gastroenterology.“AI-based systems (CADx) have been proposed as a solution to these barriers to implementation, with studies showing high adherence to Preservation and Incorporation of Valuable Endoscopic Innovations (PIVI) thresholds when using AI-H,” they wrote. “However, the efficacy and safety of autonomous AI-based diagnostic platforms have not yet been evaluated.”

To address this knowledge gap, Dr. Djinbachian and colleagues conducted a randomized controlled noninferiority trial involving 467 patients, all of whom underwent elective colonoscopies at a single academic institution.

Participants were randomly assigned to one of two groups. The first group received an optical diagnosis of diminutive (1-5 mm) colorectal polyps using an autonomous AI-based CADx system without any human input. The second group had diagnoses performed by endoscopists who used AI-H to make their optical diagnoses.

The primary outcome was the accuracy of optical diagnosis compared with the gold standard of histologic evaluation. Secondarily, the investigators explored associations between pathology-based surveillance intervals and various measures of accuracy, including sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV).

The results showed that the accuracy of optical diagnosis for diminutive polyps was similar between the two groups, supporting noninferiority. Autonomous AI achieved an accuracy rate of 77.2%, while the AI-H group had an accuracy of 72.1%, which was not statistically significant (P = .86).

But when it came to pathology-based surveillance intervals, autonomous AI showed a clear advantage; the autonomous AI system achieved a 91.5% agreement rate, compared with 82.1% for the AI-H group (P = .016).

“These findings indicate that autonomous AI not only matches but also surpasses AI-H in accuracy for determining surveillance intervals,” the investigators wrote, noting that this finding highlights the “complexities of human interaction with AI modules where human intervention could lead to worse outcomes.”

Further analysis revealed that the sensitivity of autonomous AI for identifying adenomas was 84.8%, slightly higher than the 83.6% sensitivity of the AI-H group. Specificity was 64.4% for autonomous AI vs 63.8% for AI-H. While PPV was higher in the autonomous AI group (85.6%), compared with the AI-H group (78.6%), NPV was lower for autonomous AI than AI-H (63.0% vs 71.0%).

Dr. Djinbachian and colleagues suggested that future research should focus on larger, multicenter trials to validate these findings and further explore the integration of autonomous AI systems in clinical practice. They also noted that improving AI algorithms to accurately diagnose sessile serrated lesions could enhance the overall effectiveness of AI-based optical diagnosis.

“The performance of autonomous AI in accurately diagnosing diminutive polyps and determining appropriate surveillance intervals suggests that it could play a crucial role in streamlining colorectal cancer screening processes, reducing the burden on pathologists, and potentially lowering healthcare costs,” the investigators concluded.The study was supported by Fujifilm, which had no role in the study design or data analysis. Dr. von Renteln reported additional research funding from Vantage and Fujifilm.

Highlights in ulcerative colitis (UC) and Crohn's disease (CD) from Digestive Disease Week® (DDW) 2024 are reported on by Dr. Andres Yarur from Cedars Sinai Medical Center in Los Angeles.

Dr. Yarur opens by discussing two phase 3 studies focused on risankizumab (RZB), which is currently approved for treatment of CD and has shown efficacy in UC. The first showed an induction period extended from 12 to 24 weeks resulted in clinical response in more than half of patients with UC.

The second study compared maintenance therapy with RZB to ustekinumab in patients with CD and found that RZB resulted in a higher rate of remission.

Dr. Yarur next looks at a study that explored use of darvadstrocel, an allogeneic stem cell therapy, in a subset of patients with CD and complex perianal fistulas. The disappointing results of the ADMIRE-CD II trial showed no benefit over placebo.

Patients hospitalized with UC, a population with few therapeutic options, were the focus of the next study. The TRIUMPH study explored use of the Janus kinase inhibitor tofacitinib for these patients and found that clinical response was achieved by 58.3% of them by day 7.

The final study addressed a clinical challenge: devising the optimal vaccination strategy for patients on immunosuppressive or anti–tumor necrosis factor therapies. Dr. Yarur reports that the study found an intensified pneumococcal vaccine regimen was more immunogenic and provided immunity for a longer duration than did the standard regimen.

--

Andres J. Yarur, MD, Associate Professor of Medicine, Cedars Sinai Medical Center, Los Angeles, California

Andres J. Yarur, MD, has disclosed the following relevant financial relationships:

Serve(d) as a consultant for: Takeda; Pfizer; Arena; AbbVie; Bristol Myers Squibb; Boehringer Ingelheim; Celltrion

Highlights in ulcerative colitis (UC) and Crohn's disease (CD) from Digestive Disease Week® (DDW) 2024 are reported on by Dr. Andres Yarur from Cedars Sinai Medical Center in Los Angeles.

Dr. Yarur opens by discussing two phase 3 studies focused on risankizumab (RZB), which is currently approved for treatment of CD and has shown efficacy in UC. The first showed an induction period extended from 12 to 24 weeks resulted in clinical response in more than half of patients with UC.

The second study compared maintenance therapy with RZB to ustekinumab in patients with CD and found that RZB resulted in a higher rate of remission.

Dr. Yarur next looks at a study that explored use of darvadstrocel, an allogeneic stem cell therapy, in a subset of patients with CD and complex perianal fistulas. The disappointing results of the ADMIRE-CD II trial showed no benefit over placebo.

Patients hospitalized with UC, a population with few therapeutic options, were the focus of the next study. The TRIUMPH study explored use of the Janus kinase inhibitor tofacitinib for these patients and found that clinical response was achieved by 58.3% of them by day 7.

The final study addressed a clinical challenge: devising the optimal vaccination strategy for patients on immunosuppressive or anti–tumor necrosis factor therapies. Dr. Yarur reports that the study found an intensified pneumococcal vaccine regimen was more immunogenic and provided immunity for a longer duration than did the standard regimen.

--

Andres J. Yarur, MD, Associate Professor of Medicine, Cedars Sinai Medical Center, Los Angeles, California

Andres J. Yarur, MD, has disclosed the following relevant financial relationships:

Serve(d) as a consultant for: Takeda; Pfizer; Arena; AbbVie; Bristol Myers Squibb; Boehringer Ingelheim; Celltrion

Highlights in ulcerative colitis (UC) and Crohn's disease (CD) from Digestive Disease Week® (DDW) 2024 are reported on by Dr. Andres Yarur from Cedars Sinai Medical Center in Los Angeles.

Dr. Yarur opens by discussing two phase 3 studies focused on risankizumab (RZB), which is currently approved for treatment of CD and has shown efficacy in UC. The first showed an induction period extended from 12 to 24 weeks resulted in clinical response in more than half of patients with UC.

The second study compared maintenance therapy with RZB to ustekinumab in patients with CD and found that RZB resulted in a higher rate of remission.

Dr. Yarur next looks at a study that explored use of darvadstrocel, an allogeneic stem cell therapy, in a subset of patients with CD and complex perianal fistulas. The disappointing results of the ADMIRE-CD II trial showed no benefit over placebo.

Patients hospitalized with UC, a population with few therapeutic options, were the focus of the next study. The TRIUMPH study explored use of the Janus kinase inhibitor tofacitinib for these patients and found that clinical response was achieved by 58.3% of them by day 7.

The final study addressed a clinical challenge: devising the optimal vaccination strategy for patients on immunosuppressive or anti–tumor necrosis factor therapies. Dr. Yarur reports that the study found an intensified pneumococcal vaccine regimen was more immunogenic and provided immunity for a longer duration than did the standard regimen.

--

Andres J. Yarur, MD, Associate Professor of Medicine, Cedars Sinai Medical Center, Los Angeles, California

Andres J. Yarur, MD, has disclosed the following relevant financial relationships:

Serve(d) as a consultant for: Takeda; Pfizer; Arena; AbbVie; Bristol Myers Squibb; Boehringer Ingelheim; Celltrion

Colitis-induced small intestinal hypomotility is closely linked to the loss of enteroendocrine cells (EECs) in mice, revealing a potential therapeutic strategy for patients with inflammatory bowel disease (IBD), according to investigators.

These findings suggest that restoring EEC function could alleviate some of the more general abdominal symptoms associated with IBD, reported lead author Zachariah Raouf, MD, of Johns Hopkins University School of Medicine, Baltimore, and colleagues.

“The symptoms experienced by patients with IBD, especially ulcerative colitis, may include those that are colonic in nature, such as bloody stools, abdominal pain, and weight loss, as well as those that are more general in nature, such as severe nausea and abdominal bloating,” the investigators wrote in Cellular and Molecular Gastroenterology and Hepatology . “Although the first set of symptoms may be attributable to the effects of colonic inflammation itself, those that are more vague seem to overlap with the symptoms that patients with small intestinal dysmotility experience, such as occur in response to medications, or diabetes.”

Supporting this notion, several previous studies have reported the onset of intestinal dysmotility in experimental models of colitis, which is believed to be caused by impaired enteric nervous system function. But the precise mechanisms behind the impaired intestinal motility observed in colitis patients remain unclear.

To learn more, Dr. Raouf and colleagues conducted experiments involving three groups of mice: wild-type mice, mice genetically engineered to overexpress EECs, and mice lacking EECs.

To induce colitis, the mice were administered dextran sulfate sodium (DSS) in drinking water at concentrations of 2.5% or 5% for 7 days. Small intestinal motility was evaluated by measuring the transit of fluorescein isothiocyanate (FITC)-dextran. Immunohistochemical analyses were conducted to assess EEC number and differentiation, while quantitative reverse-transcriptase polymerase chain reaction was used to examine the expression of genes related to serotonin synthesis and transport.

The researchers examined colon length and signs of colonic inflammation, monitored weight loss, and measured the expression of proinflammatory cytokines. Histological analyses of colon and small intestine tissues were performed to further understand the effects of colitis. The presence and number of EEC cells was evaluated using chromogranin A (ChgA) staining, while apoptosis in EECs was measured via TUNEL staining. The expression of serotonin-related genes was also assessed.

These experiments revealed that DSS-induced colitis led to significant small-bowel hypomotility and a reduction in EEC density. Of note, genetic overexpression of EECs or treatment with prucalopride, a 5-hydroxytryptamine receptor 4 agonist, improved small intestinal motility.

“It is noteworthy that there were no significant changes in the density of other intestinal epithelial cells, or in other cell types that are linked to motility, such as enteric glia and neurons, suggesting the specificity of the effect,” the investigators wrote. “Importantly, treatment with a serotonin agonist ameliorated the colitis-induced, small-bowel hypomotility and attenuated the severity of colitis, providing potential clinical relevance of the current findings. Taken together, these results identify mechanisms to explain the intestinal hypomotility observed in the setting of colitis.”Dr. Raouf and colleagues called for human clinical trials to their findings. Specifically, they suggested exploring therapies targeting enteroendocrine cells or serotonin pathways and examining the role of different EEC types in gut motility during inflammation. The study was supported by the National Institutes of Health. The investigators disclosed no conflicts of interest.

Colitis-induced small intestinal hypomotility is closely linked to the loss of enteroendocrine cells (EECs) in mice, revealing a potential therapeutic strategy for patients with inflammatory bowel disease (IBD), according to investigators.

These findings suggest that restoring EEC function could alleviate some of the more general abdominal symptoms associated with IBD, reported lead author Zachariah Raouf, MD, of Johns Hopkins University School of Medicine, Baltimore, and colleagues.

“The symptoms experienced by patients with IBD, especially ulcerative colitis, may include those that are colonic in nature, such as bloody stools, abdominal pain, and weight loss, as well as those that are more general in nature, such as severe nausea and abdominal bloating,” the investigators wrote in Cellular and Molecular Gastroenterology and Hepatology . “Although the first set of symptoms may be attributable to the effects of colonic inflammation itself, those that are more vague seem to overlap with the symptoms that patients with small intestinal dysmotility experience, such as occur in response to medications, or diabetes.”

Supporting this notion, several previous studies have reported the onset of intestinal dysmotility in experimental models of colitis, which is believed to be caused by impaired enteric nervous system function. But the precise mechanisms behind the impaired intestinal motility observed in colitis patients remain unclear.

To learn more, Dr. Raouf and colleagues conducted experiments involving three groups of mice: wild-type mice, mice genetically engineered to overexpress EECs, and mice lacking EECs.

To induce colitis, the mice were administered dextran sulfate sodium (DSS) in drinking water at concentrations of 2.5% or 5% for 7 days. Small intestinal motility was evaluated by measuring the transit of fluorescein isothiocyanate (FITC)-dextran. Immunohistochemical analyses were conducted to assess EEC number and differentiation, while quantitative reverse-transcriptase polymerase chain reaction was used to examine the expression of genes related to serotonin synthesis and transport.

The researchers examined colon length and signs of colonic inflammation, monitored weight loss, and measured the expression of proinflammatory cytokines. Histological analyses of colon and small intestine tissues were performed to further understand the effects of colitis. The presence and number of EEC cells was evaluated using chromogranin A (ChgA) staining, while apoptosis in EECs was measured via TUNEL staining. The expression of serotonin-related genes was also assessed.

These experiments revealed that DSS-induced colitis led to significant small-bowel hypomotility and a reduction in EEC density. Of note, genetic overexpression of EECs or treatment with prucalopride, a 5-hydroxytryptamine receptor 4 agonist, improved small intestinal motility.

“It is noteworthy that there were no significant changes in the density of other intestinal epithelial cells, or in other cell types that are linked to motility, such as enteric glia and neurons, suggesting the specificity of the effect,” the investigators wrote. “Importantly, treatment with a serotonin agonist ameliorated the colitis-induced, small-bowel hypomotility and attenuated the severity of colitis, providing potential clinical relevance of the current findings. Taken together, these results identify mechanisms to explain the intestinal hypomotility observed in the setting of colitis.”Dr. Raouf and colleagues called for human clinical trials to their findings. Specifically, they suggested exploring therapies targeting enteroendocrine cells or serotonin pathways and examining the role of different EEC types in gut motility during inflammation. The study was supported by the National Institutes of Health. The investigators disclosed no conflicts of interest.

Colitis-induced small intestinal hypomotility is closely linked to the loss of enteroendocrine cells (EECs) in mice, revealing a potential therapeutic strategy for patients with inflammatory bowel disease (IBD), according to investigators.

These findings suggest that restoring EEC function could alleviate some of the more general abdominal symptoms associated with IBD, reported lead author Zachariah Raouf, MD, of Johns Hopkins University School of Medicine, Baltimore, and colleagues.

“The symptoms experienced by patients with IBD, especially ulcerative colitis, may include those that are colonic in nature, such as bloody stools, abdominal pain, and weight loss, as well as those that are more general in nature, such as severe nausea and abdominal bloating,” the investigators wrote in Cellular and Molecular Gastroenterology and Hepatology . “Although the first set of symptoms may be attributable to the effects of colonic inflammation itself, those that are more vague seem to overlap with the symptoms that patients with small intestinal dysmotility experience, such as occur in response to medications, or diabetes.”

Supporting this notion, several previous studies have reported the onset of intestinal dysmotility in experimental models of colitis, which is believed to be caused by impaired enteric nervous system function. But the precise mechanisms behind the impaired intestinal motility observed in colitis patients remain unclear.

To learn more, Dr. Raouf and colleagues conducted experiments involving three groups of mice: wild-type mice, mice genetically engineered to overexpress EECs, and mice lacking EECs.

To induce colitis, the mice were administered dextran sulfate sodium (DSS) in drinking water at concentrations of 2.5% or 5% for 7 days. Small intestinal motility was evaluated by measuring the transit of fluorescein isothiocyanate (FITC)-dextran. Immunohistochemical analyses were conducted to assess EEC number and differentiation, while quantitative reverse-transcriptase polymerase chain reaction was used to examine the expression of genes related to serotonin synthesis and transport.

The researchers examined colon length and signs of colonic inflammation, monitored weight loss, and measured the expression of proinflammatory cytokines. Histological analyses of colon and small intestine tissues were performed to further understand the effects of colitis. The presence and number of EEC cells was evaluated using chromogranin A (ChgA) staining, while apoptosis in EECs was measured via TUNEL staining. The expression of serotonin-related genes was also assessed.

These experiments revealed that DSS-induced colitis led to significant small-bowel hypomotility and a reduction in EEC density. Of note, genetic overexpression of EECs or treatment with prucalopride, a 5-hydroxytryptamine receptor 4 agonist, improved small intestinal motility.

“It is noteworthy that there were no significant changes in the density of other intestinal epithelial cells, or in other cell types that are linked to motility, such as enteric glia and neurons, suggesting the specificity of the effect,” the investigators wrote. “Importantly, treatment with a serotonin agonist ameliorated the colitis-induced, small-bowel hypomotility and attenuated the severity of colitis, providing potential clinical relevance of the current findings. Taken together, these results identify mechanisms to explain the intestinal hypomotility observed in the setting of colitis.”Dr. Raouf and colleagues called for human clinical trials to their findings. Specifically, they suggested exploring therapies targeting enteroendocrine cells or serotonin pathways and examining the role of different EEC types in gut motility during inflammation. The study was supported by the National Institutes of Health. The investigators disclosed no conflicts of interest.

CHICAGO — Have a great tech idea to improve gastroenterology? Start-up companies have the potential to transform the practice of medicine, and to make founders a nice pot of money, but it is a difficult road. At the 2024 AGA Tech Summit, held at the Chicago headquarters of MATTER, a global healthcare startup incubator, investors and gastroenterologists discussed some of the key challenges and opportunities for GI startups.

The road is daunting, and founders must be dedicated to their companies but also maintain life balance. “It is very easy, following your passion, for your life to get out of check. I don’t know what the divorce rate is for entrepreneurs, but I personally was a victim of that. The culture that we built was addictive and it became all encompassing, and at the same time [I neglected] my home life,” Scott Fraser, managing director of the consulting company Fraser Healthcare, said during a “Scars and Stripes” panel at the summit.

vicriswakicludrilospobishidabolupresepruchigitricoslucuthed

For those willing to navigate those waters, there is help. Investors are prepared to provide seed money for companies with good ideas and a strong market. AGA itself has stepped into the investment field with its GI Opportunity Fund, which it launched in 2022 through a partnership with Varia Ventures. The fund’s capital comes from AGA members, with a minimum investment of $25,000. To date, AGA has made investments in six companies, at around $100,000 per company. “It’s not a large amount that we’re investing. We’re a lead investor that signals to other venture capital companies that this is a viable company,” Tom Serena, CEO of AGA, said in an interview.

The fund grew out of AGA’s commitment to boosting early-stage companies in the gastroenterology space. AGA has always supported GI device and tech companies through its Center for GI Innovation and Technology, which sponsored the AGA Tech Summit. The center now provides resources and advice for GI innovators and startups. The AGA Tech Summit has created a gathering place for entrepreneurs and innovators to share their experiences and learn from one another. “But what we were missing was the last mile, which is getting funding to the companies,” said Mr. Serena. The summit itself has been modified to increase the venture capital presence. “That’s the networking we’re trying to [create] here. Venture capitalists are well acquainted with these companies, but we feel that AGA can bring clinical due diligence, and the startups want to be exposed to venture capital,” said Mr. Serena.

During the “Learn from VC Strategists” panel, investors shared advice for entrepreneurs. The emphasis throughout was on marketable ideas that can fundamentally change healthcare practice, though inventions may not have the whiz-bang appeal of some new technologies of years past.

“We’re particularly focused on clinical models that actually work. There were a lot of companies for many years that were doing things that had minimal impact, or very incremental impact. Maybe they were helping identify certain patients, but they weren’t actually engaging those patients. We’re now looking very end-to-end and trying to make sure that it’s not just a good idea, but one that you can actually roll out, engage patients, and see the [return on investment] in that patient data,” said Kelsey Maguire, managing director of the Blue Venture Fund, which is a collaborative effort across Blue Cross Blue Shield companies.

suposwauahavedrislubipichocejewuliwojaweuostochedroveswotidebrinacukepubuclicrucovuphadraphastiuevugocrislesperuluhanacrabrashiciwruchikebedrolusletestanipochusemeshikophodriwrajirohaphaslistimaracatobrufrimowadruprohutreuilocresh

Jung_Barbara_2023_web.jpg

uatredujuclecrofrotropratreslatronibaswulojasadritrenuhejohostewriwrajuproclo

lovosterasheshoslilofrotricrutejidriuobobrestiprestefrupremowivonututrolouuwuristahugucremathuduruchidawrejoslenewatritobrukigitiwritecrupeswibriwradriclegep

CHICAGO — Have a great tech idea to improve gastroenterology? Start-up companies have the potential to transform the practice of medicine, and to make founders a nice pot of money, but it is a difficult road. At the 2024 AGA Tech Summit, held at the Chicago headquarters of MATTER, a global healthcare startup incubator, investors and gastroenterologists discussed some of the key challenges and opportunities for GI startups.

The road is daunting, and founders must be dedicated to their companies but also maintain life balance. “It is very easy, following your passion, for your life to get out of check. I don’t know what the divorce rate is for entrepreneurs, but I personally was a victim of that. The culture that we built was addictive and it became all encompassing, and at the same time [I neglected] my home life,” Scott Fraser, managing director of the consulting company Fraser Healthcare, said during a “Scars and Stripes” panel at the summit.

vicriswakicludrilospobishidabolupresepruchigitricoslucuthed

For those willing to navigate those waters, there is help. Investors are prepared to provide seed money for companies with good ideas and a strong market. AGA itself has stepped into the investment field with its GI Opportunity Fund, which it launched in 2022 through a partnership with Varia Ventures. The fund’s capital comes from AGA members, with a minimum investment of $25,000. To date, AGA has made investments in six companies, at around $100,000 per company. “It’s not a large amount that we’re investing. We’re a lead investor that signals to other venture capital companies that this is a viable company,” Tom Serena, CEO of AGA, said in an interview.

The fund grew out of AGA’s commitment to boosting early-stage companies in the gastroenterology space. AGA has always supported GI device and tech companies through its Center for GI Innovation and Technology, which sponsored the AGA Tech Summit. The center now provides resources and advice for GI innovators and startups. The AGA Tech Summit has created a gathering place for entrepreneurs and innovators to share their experiences and learn from one another. “But what we were missing was the last mile, which is getting funding to the companies,” said Mr. Serena. The summit itself has been modified to increase the venture capital presence. “That’s the networking we’re trying to [create] here. Venture capitalists are well acquainted with these companies, but we feel that AGA can bring clinical due diligence, and the startups want to be exposed to venture capital,” said Mr. Serena.

During the “Learn from VC Strategists” panel, investors shared advice for entrepreneurs. The emphasis throughout was on marketable ideas that can fundamentally change healthcare practice, though inventions may not have the whiz-bang appeal of some new technologies of years past.

“We’re particularly focused on clinical models that actually work. There were a lot of companies for many years that were doing things that had minimal impact, or very incremental impact. Maybe they were helping identify certain patients, but they weren’t actually engaging those patients. We’re now looking very end-to-end and trying to make sure that it’s not just a good idea, but one that you can actually roll out, engage patients, and see the [return on investment] in that patient data,” said Kelsey Maguire, managing director of the Blue Venture Fund, which is a collaborative effort across Blue Cross Blue Shield companies.

suposwauahavedrislubipichocejewuliwojaweuostochedroveswotidebrinacukepubuclicrucovuphadraphastiuevugocrislesperuluhanacrabrashiciwruchikebedrolusletestanipochusemeshikophodriwrajirohaphaslistimaracatobrufrimowadruprohutreuilocresh

Jung_Barbara_2023_web.jpg

uatredujuclecrofrotropratreslatronibaswulojasadritrenuhejohostewriwrajuproclo

lovosterasheshoslilofrotricrutejidriuobobrestiprestefrupremowivonututrolouuwuristahugucremathuduruchidawrejoslenewatritobrukigitiwritecrupeswibriwradriclegep

CHICAGO — Have a great tech idea to improve gastroenterology? Start-up companies have the potential to transform the practice of medicine, and to make founders a nice pot of money, but it is a difficult road. At the 2024 AGA Tech Summit, held at the Chicago headquarters of MATTER, a global healthcare startup incubator, investors and gastroenterologists discussed some of the key challenges and opportunities for GI startups.

The road is daunting, and founders must be dedicated to their companies but also maintain life balance. “It is very easy, following your passion, for your life to get out of check. I don’t know what the divorce rate is for entrepreneurs, but I personally was a victim of that. The culture that we built was addictive and it became all encompassing, and at the same time [I neglected] my home life,” Scott Fraser, managing director of the consulting company Fraser Healthcare, said during a “Scars and Stripes” panel at the summit.

vicriswakicludrilospobishidabolupresepruchigitricoslucuthed

For those willing to navigate those waters, there is help. Investors are prepared to provide seed money for companies with good ideas and a strong market. AGA itself has stepped into the investment field with its GI Opportunity Fund, which it launched in 2022 through a partnership with Varia Ventures. The fund’s capital comes from AGA members, with a minimum investment of $25,000. To date, AGA has made investments in six companies, at around $100,000 per company. “It’s not a large amount that we’re investing. We’re a lead investor that signals to other venture capital companies that this is a viable company,” Tom Serena, CEO of AGA, said in an interview.

The fund grew out of AGA’s commitment to boosting early-stage companies in the gastroenterology space. AGA has always supported GI device and tech companies through its Center for GI Innovation and Technology, which sponsored the AGA Tech Summit. The center now provides resources and advice for GI innovators and startups. The AGA Tech Summit has created a gathering place for entrepreneurs and innovators to share their experiences and learn from one another. “But what we were missing was the last mile, which is getting funding to the companies,” said Mr. Serena. The summit itself has been modified to increase the venture capital presence. “That’s the networking we’re trying to [create] here. Venture capitalists are well acquainted with these companies, but we feel that AGA can bring clinical due diligence, and the startups want to be exposed to venture capital,” said Mr. Serena.

During the “Learn from VC Strategists” panel, investors shared advice for entrepreneurs. The emphasis throughout was on marketable ideas that can fundamentally change healthcare practice, though inventions may not have the whiz-bang appeal of some new technologies of years past.

“We’re particularly focused on clinical models that actually work. There were a lot of companies for many years that were doing things that had minimal impact, or very incremental impact. Maybe they were helping identify certain patients, but they weren’t actually engaging those patients. We’re now looking very end-to-end and trying to make sure that it’s not just a good idea, but one that you can actually roll out, engage patients, and see the [return on investment] in that patient data,” said Kelsey Maguire, managing director of the Blue Venture Fund, which is a collaborative effort across Blue Cross Blue Shield companies.

suposwauahavedrislubipichocejewuliwojaweuostochedroveswotidebrinacukepubuclicrucovuphadraphastiuevugocrislesperuluhanacrabrashiciwruchikebedrolusletestanipochusemeshikophodriwrajirohaphaslistimaracatobrufrimowadruprohutreuilocresh

Jung_Barbara_2023_web.jpg

uatredujuclecrofrotropratreslatronibaswulojasadritrenuhejohostewriwrajuproclo

lovosterasheshoslilofrotricrutejidriuobobrestiprestefrupremowivonututrolouuwuristahugucremathuduruchidawrejoslenewatritobrukigitiwritecrupeswibriwradriclegep

gastufrimarabobireloswaclonitholiphiwufratroleprukistuhunonuwrewophophutholonirecipragaceclafrostonapadoprikashigaspichehesigoclufreruspuprosherajuticricheproswuprepichuslaheslauucevestiwriprihanurucuslowistestuduwraspeswotronawobunucronidul

In this issue:

1. Eosinophilic Gastrointestinal Diseases: Beyond EoE
   Nirmala Gonsalves, MD, AGAF, FACG
2. The Changing Face of IBD: Beyond the Western World
   Gilaad G. Kaplan, MD, MPH, AGAF; Paulo Kotze, MD, MS, PhD; Siew C. Ng, MBBS, PhD, AGAF
3. Role of Non-invasive Biomarkers in the Evaluation and Management of MASLD
   Julia J. Wattacheril, MD, MPH
4. The Emerging Role of Liquid Biopsy in the Diagnosis and Management of CRC
   David Lieberman, MD, AGAF
5. Cannabinoids and Digestive Disorders
   Jami A. Kinnucan, MD, AGAF, FACG
6. AI and Machine Learning in IBD: Promising Applications and Remaining Challenges
   Shirley Cohen-Mekelburg, MD, MS
7. Simulation-Based Training in Endoscopy: Benefits and Challenges
   Richa Shukla, MD
8. Fluid Management in Acute Pancreatitis
   Jorge D. Machicado, MD, MPH

gastufrimarabobireloswaclonitholiphiwufratroleprukistuhunonuwrewophophutholonirecipragaceclafrostonapadoprikashigaspichehesigoclufreruspuprosherajuticricheproswuprepichuslaheslauucevestiwriprihanurucuslowistestuduwraspeswotronawobunucronidul

In this issue:

1. Eosinophilic Gastrointestinal Diseases: Beyond EoE
   Nirmala Gonsalves, MD, AGAF, FACG
2. The Changing Face of IBD: Beyond the Western World
   Gilaad G. Kaplan, MD, MPH, AGAF; Paulo Kotze, MD, MS, PhD; Siew C. Ng, MBBS, PhD, AGAF
3. Role of Non-invasive Biomarkers in the Evaluation and Management of MASLD
   Julia J. Wattacheril, MD, MPH
4. The Emerging Role of Liquid Biopsy in the Diagnosis and Management of CRC
   David Lieberman, MD, AGAF
5. Cannabinoids and Digestive Disorders
   Jami A. Kinnucan, MD, AGAF, FACG
6. AI and Machine Learning in IBD: Promising Applications and Remaining Challenges
   Shirley Cohen-Mekelburg, MD, MS
7. Simulation-Based Training in Endoscopy: Benefits and Challenges
   Richa Shukla, MD
8. Fluid Management in Acute Pancreatitis
   Jorge D. Machicado, MD, MPH

gastufrimarabobireloswaclonitholiphiwufratroleprukistuhunonuwrewophophutholonirecipragaceclafrostonapadoprikashigaspichehesigoclufreruspuprosherajuticricheproswuprepichuslaheslauucevestiwriprihanurucuslowistestuduwraspeswotronawobunucronidul

In this issue:

1. Eosinophilic Gastrointestinal Diseases: Beyond EoE
   Nirmala Gonsalves, MD, AGAF, FACG
2. The Changing Face of IBD: Beyond the Western World
   Gilaad G. Kaplan, MD, MPH, AGAF; Paulo Kotze, MD, MS, PhD; Siew C. Ng, MBBS, PhD, AGAF
3. Role of Non-invasive Biomarkers in the Evaluation and Management of MASLD
   Julia J. Wattacheril, MD, MPH
4. The Emerging Role of Liquid Biopsy in the Diagnosis and Management of CRC
   David Lieberman, MD, AGAF
5. Cannabinoids and Digestive Disorders
   Jami A. Kinnucan, MD, AGAF, FACG
6. AI and Machine Learning in IBD: Promising Applications and Remaining Challenges
   Shirley Cohen-Mekelburg, MD, MS
7. Simulation-Based Training in Endoscopy: Benefits and Challenges
   Richa Shukla, MD
8. Fluid Management in Acute Pancreatitis
   Jorge D. Machicado, MD, MPH

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024

Click here to view more from Gastroenterology Data Trends 2024