IBD & Intestinal Disorders

WASHINGTON — The selective interleukin (IL)–23p29 monoclonal antibody mirikizumab demonstrated safety and efficacy in people with moderate to severe Crohn’s disease compared with placebo up to 52 weeks, according to results of the phase 3 randomized, double blind, treat-through VIVID-1 study. 

Bruce E. Sands, MD, AGAF, chief of gastroenterology at the Icahn School of Medicine at Mount Sinai in New York, reported the findings in a poster (Abstract Su1801) at the annual Digestive Disease Week^® (DDW).

The FDA approved mirikizumab (Omvoh, Eli Lilly) to treat moderate to severe ulcerative colitis in October 2023. 

Dr. Sands and a team of US and international collaborators studied 1065 adults with Crohn’s disease or fistulizing Crohn’s disease for 3 months or more, with a mean duration of more than 7 years. At baseline, participants had a Simple Endoscopic Score for Crohn’s Disease (SES-CD) of 7 or more and reported an inadequate response, lost response, or intolerance to other therapy.

A total of 579 people were randomly assigned to mirikizumab and another 199 to placebo. Another 287 patients received ustekinumab; though they were not included in this current analysis, the findings were presented separately at DDW 2024. 

Mean age of study participants was 30 years, and men comprised 57%-59% of the groups. Nearly half (49%) of each group previously failed biologic therapy. 

A primary composite endpoint was clinical response at 12 weeks according to patient reported outcome and endoscopic response at 52 weeks measured with the SES-CD. A second primary endpoint was clinical response at 12 weeks by patient reported outcome combined with clinical remission on Crohn’s Disease Activity Index (CDAI) at 52 weeks.

Researchers also tracked 12 major secondary endpoints for mirikizumab vs placebo, including clinical response, endoscopic response, and clinical remission at week 12 and week 52. 
 

Efficacy Findings

A higher percentage of participants in the mirikizumab group achieved 12-week secondary endpoints compared with placebo. In the treatment group, 32.5% reached endoscopic response vs 12.6% in the placebo group, a statistically significant difference (P < .000001). In addition, 17.6% achieved endoscopic remission in the treatment group vs 7.0% in the placebo group at 12 weeks (P < .000213).

The “treat-through” results at 52 weeks revealed that a higher proportion of the group taking mirikizumab met the co-primary endpoints compared with placebo. A total of 48.4% in the mirikizumab group vs 9.0% in the placebo group achieved endoscopic response (P < .000001). Similarly, a higher proportion met clinical remission on the CDAI, 54.1% in the treatment group vs 19.6% in the placebo group (P < .000001).

Overall, 38% of mirikizumab-treated patients vs 9% of the placebo group reached a composite endpoint of patient reported clinical response at week 12 and endoscopic response by SES-CD at week 52 (P < .000001).

Dr. Sands and colleagues also combined clinical response reported by patients at 12 weeks with CDAI findings for clinical remission at week 52. A total of 45.4% in the treatment group met the combined endpoint compared with 19.6% of the placebo group (P < .000001). 

In an additional analysis, the researchers looked at this composite endpoint in patients in both groups who had failed or not failed a prior biologic for a total of 43.4% vs 12.4%, and 47.3% vs 26.5%, respectively.

“Mirikizumab demonstrated statistically significant and clinically meaningful improvements” in the study co-primary endpoints and secondary endpoints compared with placebo, the researchers concluded. 
 

Safety Findings

Safety outcomes during the 52-week study were “consistent with the known safety profile” of mirikizumab, the researchers noted. 

Treatment-emergent adverse events occurred in 78.6% of mirikizumab participants vs 73.0% of the placebo group. The most common were COVID-19, anemia, and arthralgia. Serious adverse events were reported in 10.3% of the mirikizumab group vs 17.1% of the placebo group. There were seven opportunistic infections in the treatment group, including herpes zoster and Candida, compared with none in the placebo group. 

One person in the placebo cohort died of a pulmonary embolism; there were no deaths in the mirikizumab group. 

People randomly assigned to placebo without a response at 12 weeks were switched over to mirikizumab. However, the findings from this group between 12 and 52 weeks were excluded from the 1-year data presented at DDW 2024, including one death from worsening Crohn’s disease during that time.

Mirikizumab looked particularly robust in this study, and it may turn out to be a critically important option for our patients, said Jordan Axelrad, MD, MPH, co-director of the Inflammatory Bowel Disease Center at NYU Langone Health in New York City. Dr. Axelrad was not involved in this study. 

Of importance, effect sizes were similar for “bio-naive and previously biologic-exposed patients,” he added. 

These data “really underscore that therapies targeting IL-23 may be clinically useful for Crohn’s disease patients with prior biologic failure, representing a significant departure from our previous experience with other biologic classes,” Dr. Axelrad said.

The study was funded by Eli Lilly and Company. Dr. Sands is a consultant and receives grant funding from Lilly. Dr. Axelrad had no relevant disclosures. 

A version of this article appeared on Medscape.com.

WASHINGTON — The selective interleukin (IL)–23p29 monoclonal antibody mirikizumab demonstrated safety and efficacy in people with moderate to severe Crohn’s disease compared with placebo up to 52 weeks, according to results of the phase 3 randomized, double blind, treat-through VIVID-1 study. 

Bruce E. Sands, MD, AGAF, chief of gastroenterology at the Icahn School of Medicine at Mount Sinai in New York, reported the findings in a poster (Abstract Su1801) at the annual Digestive Disease Week^® (DDW).

The FDA approved mirikizumab (Omvoh, Eli Lilly) to treat moderate to severe ulcerative colitis in October 2023. 

Dr. Sands and a team of US and international collaborators studied 1065 adults with Crohn’s disease or fistulizing Crohn’s disease for 3 months or more, with a mean duration of more than 7 years. At baseline, participants had a Simple Endoscopic Score for Crohn’s Disease (SES-CD) of 7 or more and reported an inadequate response, lost response, or intolerance to other therapy.

A total of 579 people were randomly assigned to mirikizumab and another 199 to placebo. Another 287 patients received ustekinumab; though they were not included in this current analysis, the findings were presented separately at DDW 2024. 

Mean age of study participants was 30 years, and men comprised 57%-59% of the groups. Nearly half (49%) of each group previously failed biologic therapy. 

A primary composite endpoint was clinical response at 12 weeks according to patient reported outcome and endoscopic response at 52 weeks measured with the SES-CD. A second primary endpoint was clinical response at 12 weeks by patient reported outcome combined with clinical remission on Crohn’s Disease Activity Index (CDAI) at 52 weeks.

Researchers also tracked 12 major secondary endpoints for mirikizumab vs placebo, including clinical response, endoscopic response, and clinical remission at week 12 and week 52. 
 

Efficacy Findings

A higher percentage of participants in the mirikizumab group achieved 12-week secondary endpoints compared with placebo. In the treatment group, 32.5% reached endoscopic response vs 12.6% in the placebo group, a statistically significant difference (P < .000001). In addition, 17.6% achieved endoscopic remission in the treatment group vs 7.0% in the placebo group at 12 weeks (P < .000213).

The “treat-through” results at 52 weeks revealed that a higher proportion of the group taking mirikizumab met the co-primary endpoints compared with placebo. A total of 48.4% in the mirikizumab group vs 9.0% in the placebo group achieved endoscopic response (P < .000001). Similarly, a higher proportion met clinical remission on the CDAI, 54.1% in the treatment group vs 19.6% in the placebo group (P < .000001).

Overall, 38% of mirikizumab-treated patients vs 9% of the placebo group reached a composite endpoint of patient reported clinical response at week 12 and endoscopic response by SES-CD at week 52 (P < .000001).

Dr. Sands and colleagues also combined clinical response reported by patients at 12 weeks with CDAI findings for clinical remission at week 52. A total of 45.4% in the treatment group met the combined endpoint compared with 19.6% of the placebo group (P < .000001). 

In an additional analysis, the researchers looked at this composite endpoint in patients in both groups who had failed or not failed a prior biologic for a total of 43.4% vs 12.4%, and 47.3% vs 26.5%, respectively.

“Mirikizumab demonstrated statistically significant and clinically meaningful improvements” in the study co-primary endpoints and secondary endpoints compared with placebo, the researchers concluded. 
 

Safety Findings

Safety outcomes during the 52-week study were “consistent with the known safety profile” of mirikizumab, the researchers noted. 

Treatment-emergent adverse events occurred in 78.6% of mirikizumab participants vs 73.0% of the placebo group. The most common were COVID-19, anemia, and arthralgia. Serious adverse events were reported in 10.3% of the mirikizumab group vs 17.1% of the placebo group. There were seven opportunistic infections in the treatment group, including herpes zoster and Candida, compared with none in the placebo group. 

One person in the placebo cohort died of a pulmonary embolism; there were no deaths in the mirikizumab group. 

People randomly assigned to placebo without a response at 12 weeks were switched over to mirikizumab. However, the findings from this group between 12 and 52 weeks were excluded from the 1-year data presented at DDW 2024, including one death from worsening Crohn’s disease during that time.

Mirikizumab looked particularly robust in this study, and it may turn out to be a critically important option for our patients, said Jordan Axelrad, MD, MPH, co-director of the Inflammatory Bowel Disease Center at NYU Langone Health in New York City. Dr. Axelrad was not involved in this study. 

Of importance, effect sizes were similar for “bio-naive and previously biologic-exposed patients,” he added. 

These data “really underscore that therapies targeting IL-23 may be clinically useful for Crohn’s disease patients with prior biologic failure, representing a significant departure from our previous experience with other biologic classes,” Dr. Axelrad said.

The study was funded by Eli Lilly and Company. Dr. Sands is a consultant and receives grant funding from Lilly. Dr. Axelrad had no relevant disclosures. 

A version of this article appeared on Medscape.com.

WASHINGTON — The selective interleukin (IL)–23p29 monoclonal antibody mirikizumab demonstrated safety and efficacy in people with moderate to severe Crohn’s disease compared with placebo up to 52 weeks, according to results of the phase 3 randomized, double blind, treat-through VIVID-1 study. 

Bruce E. Sands, MD, AGAF, chief of gastroenterology at the Icahn School of Medicine at Mount Sinai in New York, reported the findings in a poster (Abstract Su1801) at the annual Digestive Disease Week^® (DDW).

The FDA approved mirikizumab (Omvoh, Eli Lilly) to treat moderate to severe ulcerative colitis in October 2023. 

Dr. Sands and a team of US and international collaborators studied 1065 adults with Crohn’s disease or fistulizing Crohn’s disease for 3 months or more, with a mean duration of more than 7 years. At baseline, participants had a Simple Endoscopic Score for Crohn’s Disease (SES-CD) of 7 or more and reported an inadequate response, lost response, or intolerance to other therapy.

A total of 579 people were randomly assigned to mirikizumab and another 199 to placebo. Another 287 patients received ustekinumab; though they were not included in this current analysis, the findings were presented separately at DDW 2024. 

Mean age of study participants was 30 years, and men comprised 57%-59% of the groups. Nearly half (49%) of each group previously failed biologic therapy. 

A primary composite endpoint was clinical response at 12 weeks according to patient reported outcome and endoscopic response at 52 weeks measured with the SES-CD. A second primary endpoint was clinical response at 12 weeks by patient reported outcome combined with clinical remission on Crohn’s Disease Activity Index (CDAI) at 52 weeks.

Researchers also tracked 12 major secondary endpoints for mirikizumab vs placebo, including clinical response, endoscopic response, and clinical remission at week 12 and week 52. 
 

Efficacy Findings

A higher percentage of participants in the mirikizumab group achieved 12-week secondary endpoints compared with placebo. In the treatment group, 32.5% reached endoscopic response vs 12.6% in the placebo group, a statistically significant difference (P < .000001). In addition, 17.6% achieved endoscopic remission in the treatment group vs 7.0% in the placebo group at 12 weeks (P < .000213).

The “treat-through” results at 52 weeks revealed that a higher proportion of the group taking mirikizumab met the co-primary endpoints compared with placebo. A total of 48.4% in the mirikizumab group vs 9.0% in the placebo group achieved endoscopic response (P < .000001). Similarly, a higher proportion met clinical remission on the CDAI, 54.1% in the treatment group vs 19.6% in the placebo group (P < .000001).

Overall, 38% of mirikizumab-treated patients vs 9% of the placebo group reached a composite endpoint of patient reported clinical response at week 12 and endoscopic response by SES-CD at week 52 (P < .000001).

Dr. Sands and colleagues also combined clinical response reported by patients at 12 weeks with CDAI findings for clinical remission at week 52. A total of 45.4% in the treatment group met the combined endpoint compared with 19.6% of the placebo group (P < .000001). 

In an additional analysis, the researchers looked at this composite endpoint in patients in both groups who had failed or not failed a prior biologic for a total of 43.4% vs 12.4%, and 47.3% vs 26.5%, respectively.

“Mirikizumab demonstrated statistically significant and clinically meaningful improvements” in the study co-primary endpoints and secondary endpoints compared with placebo, the researchers concluded. 
 

Safety Findings

Safety outcomes during the 52-week study were “consistent with the known safety profile” of mirikizumab, the researchers noted. 

Treatment-emergent adverse events occurred in 78.6% of mirikizumab participants vs 73.0% of the placebo group. The most common were COVID-19, anemia, and arthralgia. Serious adverse events were reported in 10.3% of the mirikizumab group vs 17.1% of the placebo group. There were seven opportunistic infections in the treatment group, including herpes zoster and Candida, compared with none in the placebo group. 

One person in the placebo cohort died of a pulmonary embolism; there were no deaths in the mirikizumab group. 

People randomly assigned to placebo without a response at 12 weeks were switched over to mirikizumab. However, the findings from this group between 12 and 52 weeks were excluded from the 1-year data presented at DDW 2024, including one death from worsening Crohn’s disease during that time.

Mirikizumab looked particularly robust in this study, and it may turn out to be a critically important option for our patients, said Jordan Axelrad, MD, MPH, co-director of the Inflammatory Bowel Disease Center at NYU Langone Health in New York City. Dr. Axelrad was not involved in this study. 

Of importance, effect sizes were similar for “bio-naive and previously biologic-exposed patients,” he added. 

These data “really underscore that therapies targeting IL-23 may be clinically useful for Crohn’s disease patients with prior biologic failure, representing a significant departure from our previous experience with other biologic classes,” Dr. Axelrad said.

The study was funded by Eli Lilly and Company. Dr. Sands is a consultant and receives grant funding from Lilly. Dr. Axelrad had no relevant disclosures. 

A version of this article appeared on Medscape.com.

WASHINGTON — As part of a quality improvement initiative, gastroenterologists at the University of Texas Health Science Center reduced endoscopic waste by using a single tool rather than multiple tools during colonoscopies, according to a study presented at Digestive Disease Week^® (DDW).

After discussing environmentally conscious practices during regular meetings, the odds of gastroenterologists using a single tool — either biopsy forceps or a snare — compared with multiple disposable tools was three times higher.

“The burden of waste is massive, with GI being the third-largest waste generator in healthcare. The number of procedures is increasing, which just means more waste, and we have to look at ways to reduce it,” said lead author Prateek Harne, MD, a gastroenterology fellow at the University of Texas Health Science Center.

Overall, the healthcare industry generates 8.5% of U.S. greenhouse emissions, with more than 70% coming from used instruments and supplies, he said. GI endoscopy generates 85,000 metric tons of carbon dioxide waste annually. That waste stems from high case volumes, patient travel, the decontamination process, and single-use devices.

After seeing the waste at his institution, Dr. Harne wondered how to reduce single-use device and nonrenewable waste, particularly the tools used during polypectomies. He and colleagues decided to focus on single-tool use and collected data about the tools used during screening colonoscopies for 8 weeks before an intervention.

As part of the intervention, Dr. Harne and colleagues discussed green endoscopy initiatives supported by North American gastrointestinal societies during a journal club meeting with gastroenterology faculty. They also discussed potential strategies to reduce waste in day-to-day practice during a monthly business meeting, particularly focused on being mindful of using tools during polypectomies. The meetings occurred 3 days apart.

Then Dr. Harne and colleagues collected data regarding tool use during screening colonoscopies, looking at the number and type of instruments used. Before the meetings, 210 patients underwent colonoscopies, including 34% that required no intervention, 32% that required one tool, and 33% that required multiple tools.

After the meetings, 112 patients underwent colonoscopies, including 34% that required no tools, 49% that used one tool, and 17% that used multiple tools. This represented a 17% increase in the use of one tool (P < .01) and a 16% decrease in the use of multiple tools (P < .01). The odds of using a single tool compared with multiple tools was 2.98, and there was a statistically significant increase in uptake of snare for polypectomy.

The study was limited by being at a single center, having a small sample size, and using a short-term assessment. At the same time, the findings show potential for a low-cost solution through open discussion with gastroenterologists.

“Sir Isaac Newton had two holes for two different sized cats in his home, but all of his cats ended up using the bigger hole,” Dr. Harne said in his conclusion. “Maybe we can do the same for polypectomies and use only the tools that we need.”

In an interview, Dr. Harne noted he spoke with the janitorial staff at his institution to learn more about endoscopy unit waste, including how much is recycled, how much is incinerated, and who handles the waste. He recognized the work being done in Europe to understand and reduce endoscopic waste and hopes U.S. groups begin to implement more measures.

“Gastroenterologists and their teams need to be more cognizant of the impact we have on the environment,” Dr. Harne said. “As our study shows, if providers are aware that they can and should use fewer tools to get the same results, it can lead to a statistically significant impact, just with a friendly reminder to reduce use.”

After the presentation, Dr. Harne discussed other shifts with conference attendees, such as not opening or unwrapping tools until needed during a procedure.

“Small changes could have big impacts. Everything that we do in QI [quality improvement] is meant to help patients and the environment,” said Amanda Krouse, MD, a research fellow at the University of California, San Diego, who was a moderator of the DDW session on GI fellow–directed QI projects.

In an interview, Alana Persaud, MD, an endoscopy fellow at Geisinger Medical Center in Danville, Pennsylvania, also a moderator of the session, said: “Ultimately, the medical services we’re providing are for the longevity of our patients, but at the same time, we don’t want it to be to the detriment of the environment, so paying attention to green endoscopy when we can preserve and use more discretion with our devices is worth it so we can all thrive together.”

Dr. Harne did not have any disclosures.

WASHINGTON — As part of a quality improvement initiative, gastroenterologists at the University of Texas Health Science Center reduced endoscopic waste by using a single tool rather than multiple tools during colonoscopies, according to a study presented at Digestive Disease Week^® (DDW).

After discussing environmentally conscious practices during regular meetings, the odds of gastroenterologists using a single tool — either biopsy forceps or a snare — compared with multiple disposable tools was three times higher.

“The burden of waste is massive, with GI being the third-largest waste generator in healthcare. The number of procedures is increasing, which just means more waste, and we have to look at ways to reduce it,” said lead author Prateek Harne, MD, a gastroenterology fellow at the University of Texas Health Science Center.

Overall, the healthcare industry generates 8.5% of U.S. greenhouse emissions, with more than 70% coming from used instruments and supplies, he said. GI endoscopy generates 85,000 metric tons of carbon dioxide waste annually. That waste stems from high case volumes, patient travel, the decontamination process, and single-use devices.

After seeing the waste at his institution, Dr. Harne wondered how to reduce single-use device and nonrenewable waste, particularly the tools used during polypectomies. He and colleagues decided to focus on single-tool use and collected data about the tools used during screening colonoscopies for 8 weeks before an intervention.

As part of the intervention, Dr. Harne and colleagues discussed green endoscopy initiatives supported by North American gastrointestinal societies during a journal club meeting with gastroenterology faculty. They also discussed potential strategies to reduce waste in day-to-day practice during a monthly business meeting, particularly focused on being mindful of using tools during polypectomies. The meetings occurred 3 days apart.

Then Dr. Harne and colleagues collected data regarding tool use during screening colonoscopies, looking at the number and type of instruments used. Before the meetings, 210 patients underwent colonoscopies, including 34% that required no intervention, 32% that required one tool, and 33% that required multiple tools.

After the meetings, 112 patients underwent colonoscopies, including 34% that required no tools, 49% that used one tool, and 17% that used multiple tools. This represented a 17% increase in the use of one tool (P < .01) and a 16% decrease in the use of multiple tools (P < .01). The odds of using a single tool compared with multiple tools was 2.98, and there was a statistically significant increase in uptake of snare for polypectomy.

The study was limited by being at a single center, having a small sample size, and using a short-term assessment. At the same time, the findings show potential for a low-cost solution through open discussion with gastroenterologists.

“Sir Isaac Newton had two holes for two different sized cats in his home, but all of his cats ended up using the bigger hole,” Dr. Harne said in his conclusion. “Maybe we can do the same for polypectomies and use only the tools that we need.”

In an interview, Dr. Harne noted he spoke with the janitorial staff at his institution to learn more about endoscopy unit waste, including how much is recycled, how much is incinerated, and who handles the waste. He recognized the work being done in Europe to understand and reduce endoscopic waste and hopes U.S. groups begin to implement more measures.

“Gastroenterologists and their teams need to be more cognizant of the impact we have on the environment,” Dr. Harne said. “As our study shows, if providers are aware that they can and should use fewer tools to get the same results, it can lead to a statistically significant impact, just with a friendly reminder to reduce use.”

After the presentation, Dr. Harne discussed other shifts with conference attendees, such as not opening or unwrapping tools until needed during a procedure.

“Small changes could have big impacts. Everything that we do in QI [quality improvement] is meant to help patients and the environment,” said Amanda Krouse, MD, a research fellow at the University of California, San Diego, who was a moderator of the DDW session on GI fellow–directed QI projects.

In an interview, Alana Persaud, MD, an endoscopy fellow at Geisinger Medical Center in Danville, Pennsylvania, also a moderator of the session, said: “Ultimately, the medical services we’re providing are for the longevity of our patients, but at the same time, we don’t want it to be to the detriment of the environment, so paying attention to green endoscopy when we can preserve and use more discretion with our devices is worth it so we can all thrive together.”

Dr. Harne did not have any disclosures.

WASHINGTON — As part of a quality improvement initiative, gastroenterologists at the University of Texas Health Science Center reduced endoscopic waste by using a single tool rather than multiple tools during colonoscopies, according to a study presented at Digestive Disease Week^® (DDW).

After discussing environmentally conscious practices during regular meetings, the odds of gastroenterologists using a single tool — either biopsy forceps or a snare — compared with multiple disposable tools was three times higher.

“The burden of waste is massive, with GI being the third-largest waste generator in healthcare. The number of procedures is increasing, which just means more waste, and we have to look at ways to reduce it,” said lead author Prateek Harne, MD, a gastroenterology fellow at the University of Texas Health Science Center.

Overall, the healthcare industry generates 8.5% of U.S. greenhouse emissions, with more than 70% coming from used instruments and supplies, he said. GI endoscopy generates 85,000 metric tons of carbon dioxide waste annually. That waste stems from high case volumes, patient travel, the decontamination process, and single-use devices.

After seeing the waste at his institution, Dr. Harne wondered how to reduce single-use device and nonrenewable waste, particularly the tools used during polypectomies. He and colleagues decided to focus on single-tool use and collected data about the tools used during screening colonoscopies for 8 weeks before an intervention.

As part of the intervention, Dr. Harne and colleagues discussed green endoscopy initiatives supported by North American gastrointestinal societies during a journal club meeting with gastroenterology faculty. They also discussed potential strategies to reduce waste in day-to-day practice during a monthly business meeting, particularly focused on being mindful of using tools during polypectomies. The meetings occurred 3 days apart.

Then Dr. Harne and colleagues collected data regarding tool use during screening colonoscopies, looking at the number and type of instruments used. Before the meetings, 210 patients underwent colonoscopies, including 34% that required no intervention, 32% that required one tool, and 33% that required multiple tools.

After the meetings, 112 patients underwent colonoscopies, including 34% that required no tools, 49% that used one tool, and 17% that used multiple tools. This represented a 17% increase in the use of one tool (P < .01) and a 16% decrease in the use of multiple tools (P < .01). The odds of using a single tool compared with multiple tools was 2.98, and there was a statistically significant increase in uptake of snare for polypectomy.

The study was limited by being at a single center, having a small sample size, and using a short-term assessment. At the same time, the findings show potential for a low-cost solution through open discussion with gastroenterologists.

“Sir Isaac Newton had two holes for two different sized cats in his home, but all of his cats ended up using the bigger hole,” Dr. Harne said in his conclusion. “Maybe we can do the same for polypectomies and use only the tools that we need.”

In an interview, Dr. Harne noted he spoke with the janitorial staff at his institution to learn more about endoscopy unit waste, including how much is recycled, how much is incinerated, and who handles the waste. He recognized the work being done in Europe to understand and reduce endoscopic waste and hopes U.S. groups begin to implement more measures.

“Gastroenterologists and their teams need to be more cognizant of the impact we have on the environment,” Dr. Harne said. “As our study shows, if providers are aware that they can and should use fewer tools to get the same results, it can lead to a statistically significant impact, just with a friendly reminder to reduce use.”

After the presentation, Dr. Harne discussed other shifts with conference attendees, such as not opening or unwrapping tools until needed during a procedure.

“Small changes could have big impacts. Everything that we do in QI [quality improvement] is meant to help patients and the environment,” said Amanda Krouse, MD, a research fellow at the University of California, San Diego, who was a moderator of the DDW session on GI fellow–directed QI projects.

In an interview, Alana Persaud, MD, an endoscopy fellow at Geisinger Medical Center in Danville, Pennsylvania, also a moderator of the session, said: “Ultimately, the medical services we’re providing are for the longevity of our patients, but at the same time, we don’t want it to be to the detriment of the environment, so paying attention to green endoscopy when we can preserve and use more discretion with our devices is worth it so we can all thrive together.”

Dr. Harne did not have any disclosures.

Genetic predisposition likely directs intestinal disease location in pediatric Crohn’s disease (CD) — whether colon-predominant (C-CD) or small-bowel-predominant (SB-CD), a small analysis in Cellular and Molecular Gastroenterology and Hepatology suggests.

Richard Kellermayer, MD, PhD, professor of pediatrics in the Section of Pediatric Gastroenterology, Hepatology and Nutrition at Baylor College of Medicine in Houston, Texas, and colleagues compared the genetic makeup of patients based on their Crohn’s disease location — predominantly in the small bowel (L4) or predominantly in the colon (L2 and/or L3). They then generated bipartite networks of susceptibility genes to study the polygenic background of the disease subtypes. They hypothesize that such networks may govern where a patient develops Crohn’s disease.

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According to current understanding, as Dr. Kellermayer told GI & Hepatology News, most autoimmune disorders, CD included, develop in people with a genetic predisposition after serial environmental insults between conception and young adulthood. “As opposed to single-gene-associated genetic disorders, autoimmune diseases are linked to several hundred genes in which subtle anomalies can work in concert to predispose someone to a certain disorder,” he said. “We hope our findings will guide the development of personalized treatments based on the disease location at diagnosis to advance precision medicine.”
 

CD cases

Eight cases of SB-CD and 11 of C-CD met the inclusion criteria. Mean age at CD diagnosis was about 11 years for both subtypes, while 36.3% of patients with C-CD were female vs 25% of those with SB-CD. Ethnicity was 72.2% White in the C-CD group and 87.5% in the SB-CD group.

As to the main ileocolonic locations according to the Paris Classification of pediatric inflammatory bowel disease, 54.5% in the C-CD group had involvement at L2 and 45.5% at L3. In SB-CD cases, 100% had disease at L4b, 37.5% at L4, and 50% at L1.

The researchers identified 115 single-nucleotide polymorphisms (SNPs) with a combined annotation-dependent depletion (CADD) score on Phil’s Read Editor (PHRED) of >10 that was associated with 97 genes. PHRED is a computer program measuring the quality of the identification of nucleobases generated by automated DNA sequencing and scores the deleteriousness of single-nucleotide variants. The identified genes in this study had a significantly (P < .01) different allele variation between C-CD and SB-CD.

Among the top 28 candidates was an SNP in the EFNA3 gene with a CADD score > 20 for differentiating between the two phenotypically distinct CD groups. Furthermore, the EFNA3 rs17723260 (predicted to be deleterious) was found to have a significantly lower allele frequency (4.5%) in C-CD compared with its allele frequency of 37.5% in SB-CD (chi square P = .0097).

“This finding indicates that EFNA3 might play a role in modulating colonic inflammation, in which a deleterious genetic defect might provide protection against colitis (and direct autoimmunity against the proximal small bowel) in the polygenic background of CD,” the investigators wrote.

EFNA3 has been linked to both CD and ulcerative colitis. Another four genes associated with the top five SNP candidates had already been connected with IBD or mammalian intestinal inflammation. 

According to the authors, the biomedical literature and mouse model findings “implicate the translational relevance of our candidate gene compendium for directing colon- vs small-bowel–predominant CD development.” They hope the findings will be replicated in larger CD cohorts differentiated by disease location. “Our work may set the nidus for CD subtype–based precision medicine by guiding individualized treatment strategies,” they wrote.

This study was supported by the ProKIIDS Network of the Crohn’s and Colitis Foundation and the Public Health Service. It was also supported by the Wagner, Frugoni, and Klaasmeyer families’ Gutsy Kids Fund and by the DR and GL Laws Fund. The authors disclosed no conflicts of interest.

Genetic predisposition likely directs intestinal disease location in pediatric Crohn’s disease (CD) — whether colon-predominant (C-CD) or small-bowel-predominant (SB-CD), a small analysis in Cellular and Molecular Gastroenterology and Hepatology suggests.

Richard Kellermayer, MD, PhD, professor of pediatrics in the Section of Pediatric Gastroenterology, Hepatology and Nutrition at Baylor College of Medicine in Houston, Texas, and colleagues compared the genetic makeup of patients based on their Crohn’s disease location — predominantly in the small bowel (L4) or predominantly in the colon (L2 and/or L3). They then generated bipartite networks of susceptibility genes to study the polygenic background of the disease subtypes. They hypothesize that such networks may govern where a patient develops Crohn’s disease.

gomugetrisadaclavuphuprospikehivotibothubauo

According to current understanding, as Dr. Kellermayer told GI & Hepatology News, most autoimmune disorders, CD included, develop in people with a genetic predisposition after serial environmental insults between conception and young adulthood. “As opposed to single-gene-associated genetic disorders, autoimmune diseases are linked to several hundred genes in which subtle anomalies can work in concert to predispose someone to a certain disorder,” he said. “We hope our findings will guide the development of personalized treatments based on the disease location at diagnosis to advance precision medicine.”
 

CD cases

Eight cases of SB-CD and 11 of C-CD met the inclusion criteria. Mean age at CD diagnosis was about 11 years for both subtypes, while 36.3% of patients with C-CD were female vs 25% of those with SB-CD. Ethnicity was 72.2% White in the C-CD group and 87.5% in the SB-CD group.

As to the main ileocolonic locations according to the Paris Classification of pediatric inflammatory bowel disease, 54.5% in the C-CD group had involvement at L2 and 45.5% at L3. In SB-CD cases, 100% had disease at L4b, 37.5% at L4, and 50% at L1.

The researchers identified 115 single-nucleotide polymorphisms (SNPs) with a combined annotation-dependent depletion (CADD) score on Phil’s Read Editor (PHRED) of >10 that was associated with 97 genes. PHRED is a computer program measuring the quality of the identification of nucleobases generated by automated DNA sequencing and scores the deleteriousness of single-nucleotide variants. The identified genes in this study had a significantly (P < .01) different allele variation between C-CD and SB-CD.

Among the top 28 candidates was an SNP in the EFNA3 gene with a CADD score > 20 for differentiating between the two phenotypically distinct CD groups. Furthermore, the EFNA3 rs17723260 (predicted to be deleterious) was found to have a significantly lower allele frequency (4.5%) in C-CD compared with its allele frequency of 37.5% in SB-CD (chi square P = .0097).

“This finding indicates that EFNA3 might play a role in modulating colonic inflammation, in which a deleterious genetic defect might provide protection against colitis (and direct autoimmunity against the proximal small bowel) in the polygenic background of CD,” the investigators wrote.

EFNA3 has been linked to both CD and ulcerative colitis. Another four genes associated with the top five SNP candidates had already been connected with IBD or mammalian intestinal inflammation. 

According to the authors, the biomedical literature and mouse model findings “implicate the translational relevance of our candidate gene compendium for directing colon- vs small-bowel–predominant CD development.” They hope the findings will be replicated in larger CD cohorts differentiated by disease location. “Our work may set the nidus for CD subtype–based precision medicine by guiding individualized treatment strategies,” they wrote.

This study was supported by the ProKIIDS Network of the Crohn’s and Colitis Foundation and the Public Health Service. It was also supported by the Wagner, Frugoni, and Klaasmeyer families’ Gutsy Kids Fund and by the DR and GL Laws Fund. The authors disclosed no conflicts of interest.

Genetic predisposition likely directs intestinal disease location in pediatric Crohn’s disease (CD) — whether colon-predominant (C-CD) or small-bowel-predominant (SB-CD), a small analysis in Cellular and Molecular Gastroenterology and Hepatology suggests.

Richard Kellermayer, MD, PhD, professor of pediatrics in the Section of Pediatric Gastroenterology, Hepatology and Nutrition at Baylor College of Medicine in Houston, Texas, and colleagues compared the genetic makeup of patients based on their Crohn’s disease location — predominantly in the small bowel (L4) or predominantly in the colon (L2 and/or L3). They then generated bipartite networks of susceptibility genes to study the polygenic background of the disease subtypes. They hypothesize that such networks may govern where a patient develops Crohn’s disease.

gomugetrisadaclavuphuprospikehivotibothubauo

According to current understanding, as Dr. Kellermayer told GI & Hepatology News, most autoimmune disorders, CD included, develop in people with a genetic predisposition after serial environmental insults between conception and young adulthood. “As opposed to single-gene-associated genetic disorders, autoimmune diseases are linked to several hundred genes in which subtle anomalies can work in concert to predispose someone to a certain disorder,” he said. “We hope our findings will guide the development of personalized treatments based on the disease location at diagnosis to advance precision medicine.”
 

CD cases

Eight cases of SB-CD and 11 of C-CD met the inclusion criteria. Mean age at CD diagnosis was about 11 years for both subtypes, while 36.3% of patients with C-CD were female vs 25% of those with SB-CD. Ethnicity was 72.2% White in the C-CD group and 87.5% in the SB-CD group.

As to the main ileocolonic locations according to the Paris Classification of pediatric inflammatory bowel disease, 54.5% in the C-CD group had involvement at L2 and 45.5% at L3. In SB-CD cases, 100% had disease at L4b, 37.5% at L4, and 50% at L1.

The researchers identified 115 single-nucleotide polymorphisms (SNPs) with a combined annotation-dependent depletion (CADD) score on Phil’s Read Editor (PHRED) of >10 that was associated with 97 genes. PHRED is a computer program measuring the quality of the identification of nucleobases generated by automated DNA sequencing and scores the deleteriousness of single-nucleotide variants. The identified genes in this study had a significantly (P < .01) different allele variation between C-CD and SB-CD.

Among the top 28 candidates was an SNP in the EFNA3 gene with a CADD score > 20 for differentiating between the two phenotypically distinct CD groups. Furthermore, the EFNA3 rs17723260 (predicted to be deleterious) was found to have a significantly lower allele frequency (4.5%) in C-CD compared with its allele frequency of 37.5% in SB-CD (chi square P = .0097).

“This finding indicates that EFNA3 might play a role in modulating colonic inflammation, in which a deleterious genetic defect might provide protection against colitis (and direct autoimmunity against the proximal small bowel) in the polygenic background of CD,” the investigators wrote.

EFNA3 has been linked to both CD and ulcerative colitis. Another four genes associated with the top five SNP candidates had already been connected with IBD or mammalian intestinal inflammation. 

According to the authors, the biomedical literature and mouse model findings “implicate the translational relevance of our candidate gene compendium for directing colon- vs small-bowel–predominant CD development.” They hope the findings will be replicated in larger CD cohorts differentiated by disease location. “Our work may set the nidus for CD subtype–based precision medicine by guiding individualized treatment strategies,” they wrote.

This study was supported by the ProKIIDS Network of the Crohn’s and Colitis Foundation and the Public Health Service. It was also supported by the Wagner, Frugoni, and Klaasmeyer families’ Gutsy Kids Fund and by the DR and GL Laws Fund. The authors disclosed no conflicts of interest.

A new two-measure metric seems to improve accuracy and statistical precision in assessing celiac disease (CeD) histology compared with either of two components alone, according to a study in Clinical Gastroenterology and Hepatology.

The new morphometric duodenal biopsy mucosal scale joins together villous height-to-crypt depth ratio (Vh:Cd) and intraepithelial lymphocytes (IEL) — each key CeD histological measures of the small intestine — in a scale called VCIEL.

The authors believe the VCIEL will enable a broader and more accurate measurement of mucosal health in CeD. It will be particularly useful for population analysis in clinical trials and could improve the powering of trial design. “Use of VCIEL may lead to better outcome measures for potential new therapeutic treatments benefiting patients,” wrote Jocelyn A. Silvester, MD, PhD, a pediatrician at Boston Children’s Hospital and an assistant professor at Harvard Medical School, and colleagues.

chushosushachokinunudi

The Study

In the absence of a broadly accepted single measure of mucosal injury in CeD, the group assessed whether the composite metric could improve statistical precision for assessing histology.

Enter VCIEL, which combines the Vh:Cd and IEL for individual patients with equal weighting by converting each scale to a fraction of their standard deviation and summing the results.

The researchers applied the VCIEL formula in a reanalysis of four clinical gluten-challenge trials and compared the results for Vh:Cd and IEL separately with those for VCIEL for clinical significance (effect size) and statistical significance.

In reanalysis of the ALV003-1021 trial, for example, the researchers observed an effect size and P value (analysis of covariance) of 1.37 and .038 for a delta (difference) value of Vh:Cd 1.17 and .005 for IEL and 1.86 and .004 for VCIEL.

For the similar gluten-challenge IMGX003-NCCIH-1721 trial, the corresponding delta results were .76 and .057 for Vh:Cd, .98 and .018 for IEL, and 1.14 and .007 for VCIEL. Comparable improvements with VCIEL over individual Vh:Cd and IEL were observed for other studies, including a nontherapeutic gluten challenge study.

In NCT03409796 trial data, the computation of VCIEL values showed an improved statistical significance relative to the component values of Vh:Cd and IEL by the within-group paired 2-tailed t test P values from baseline to day 15, particularly at a 10-g gluten challenge dose: Vh:Cd, IEL, VCIEL = .0050, .0031, and .0014, respectively.

Little correlation emerged between baseline values and changes with intervention for Vh:Cd and IEL on an individual patient basis.

The greater accuracy and statistical precision of the VCIEL scale are presumably due to averaging over some of the measurement uncertainty in individual patient and timepoint Vh:Cd and IEL values and creating a composite of different histologic properties, the authors noted.

This study was funded by ImmunogenX, Inc. First author Jack A. Syage is a cofounder and shareholder in ImmunogenX Inc. Dr. Silvester has served on an advisory board for Takeda Pharmaceuticals and has received research funding from Biomedal S.L., Cour Pharmaceuticals, and Glutenostics LLC. Several coauthors disclosed various financial ties to multiple private-sector pharmaceutical and biomedical companies, including ImmunogenX.

A new two-measure metric seems to improve accuracy and statistical precision in assessing celiac disease (CeD) histology compared with either of two components alone, according to a study in Clinical Gastroenterology and Hepatology.

The new morphometric duodenal biopsy mucosal scale joins together villous height-to-crypt depth ratio (Vh:Cd) and intraepithelial lymphocytes (IEL) — each key CeD histological measures of the small intestine — in a scale called VCIEL.

The authors believe the VCIEL will enable a broader and more accurate measurement of mucosal health in CeD. It will be particularly useful for population analysis in clinical trials and could improve the powering of trial design. “Use of VCIEL may lead to better outcome measures for potential new therapeutic treatments benefiting patients,” wrote Jocelyn A. Silvester, MD, PhD, a pediatrician at Boston Children’s Hospital and an assistant professor at Harvard Medical School, and colleagues.

chushosushachokinunudi

The Study

In the absence of a broadly accepted single measure of mucosal injury in CeD, the group assessed whether the composite metric could improve statistical precision for assessing histology.

Enter VCIEL, which combines the Vh:Cd and IEL for individual patients with equal weighting by converting each scale to a fraction of their standard deviation and summing the results.

The researchers applied the VCIEL formula in a reanalysis of four clinical gluten-challenge trials and compared the results for Vh:Cd and IEL separately with those for VCIEL for clinical significance (effect size) and statistical significance.

In reanalysis of the ALV003-1021 trial, for example, the researchers observed an effect size and P value (analysis of covariance) of 1.37 and .038 for a delta (difference) value of Vh:Cd 1.17 and .005 for IEL and 1.86 and .004 for VCIEL.

For the similar gluten-challenge IMGX003-NCCIH-1721 trial, the corresponding delta results were .76 and .057 for Vh:Cd, .98 and .018 for IEL, and 1.14 and .007 for VCIEL. Comparable improvements with VCIEL over individual Vh:Cd and IEL were observed for other studies, including a nontherapeutic gluten challenge study.

In NCT03409796 trial data, the computation of VCIEL values showed an improved statistical significance relative to the component values of Vh:Cd and IEL by the within-group paired 2-tailed t test P values from baseline to day 15, particularly at a 10-g gluten challenge dose: Vh:Cd, IEL, VCIEL = .0050, .0031, and .0014, respectively.

Little correlation emerged between baseline values and changes with intervention for Vh:Cd and IEL on an individual patient basis.

The greater accuracy and statistical precision of the VCIEL scale are presumably due to averaging over some of the measurement uncertainty in individual patient and timepoint Vh:Cd and IEL values and creating a composite of different histologic properties, the authors noted.

This study was funded by ImmunogenX, Inc. First author Jack A. Syage is a cofounder and shareholder in ImmunogenX Inc. Dr. Silvester has served on an advisory board for Takeda Pharmaceuticals and has received research funding from Biomedal S.L., Cour Pharmaceuticals, and Glutenostics LLC. Several coauthors disclosed various financial ties to multiple private-sector pharmaceutical and biomedical companies, including ImmunogenX.

A new two-measure metric seems to improve accuracy and statistical precision in assessing celiac disease (CeD) histology compared with either of two components alone, according to a study in Clinical Gastroenterology and Hepatology.

The new morphometric duodenal biopsy mucosal scale joins together villous height-to-crypt depth ratio (Vh:Cd) and intraepithelial lymphocytes (IEL) — each key CeD histological measures of the small intestine — in a scale called VCIEL.

The authors believe the VCIEL will enable a broader and more accurate measurement of mucosal health in CeD. It will be particularly useful for population analysis in clinical trials and could improve the powering of trial design. “Use of VCIEL may lead to better outcome measures for potential new therapeutic treatments benefiting patients,” wrote Jocelyn A. Silvester, MD, PhD, a pediatrician at Boston Children’s Hospital and an assistant professor at Harvard Medical School, and colleagues.

chushosushachokinunudi

The Study

In the absence of a broadly accepted single measure of mucosal injury in CeD, the group assessed whether the composite metric could improve statistical precision for assessing histology.

Enter VCIEL, which combines the Vh:Cd and IEL for individual patients with equal weighting by converting each scale to a fraction of their standard deviation and summing the results.

The researchers applied the VCIEL formula in a reanalysis of four clinical gluten-challenge trials and compared the results for Vh:Cd and IEL separately with those for VCIEL for clinical significance (effect size) and statistical significance.

In reanalysis of the ALV003-1021 trial, for example, the researchers observed an effect size and P value (analysis of covariance) of 1.37 and .038 for a delta (difference) value of Vh:Cd 1.17 and .005 for IEL and 1.86 and .004 for VCIEL.

For the similar gluten-challenge IMGX003-NCCIH-1721 trial, the corresponding delta results were .76 and .057 for Vh:Cd, .98 and .018 for IEL, and 1.14 and .007 for VCIEL. Comparable improvements with VCIEL over individual Vh:Cd and IEL were observed for other studies, including a nontherapeutic gluten challenge study.

In NCT03409796 trial data, the computation of VCIEL values showed an improved statistical significance relative to the component values of Vh:Cd and IEL by the within-group paired 2-tailed t test P values from baseline to day 15, particularly at a 10-g gluten challenge dose: Vh:Cd, IEL, VCIEL = .0050, .0031, and .0014, respectively.

Little correlation emerged between baseline values and changes with intervention for Vh:Cd and IEL on an individual patient basis.

The greater accuracy and statistical precision of the VCIEL scale are presumably due to averaging over some of the measurement uncertainty in individual patient and timepoint Vh:Cd and IEL values and creating a composite of different histologic properties, the authors noted.

This study was funded by ImmunogenX, Inc. First author Jack A. Syage is a cofounder and shareholder in ImmunogenX Inc. Dr. Silvester has served on an advisory board for Takeda Pharmaceuticals and has received research funding from Biomedal S.L., Cour Pharmaceuticals, and Glutenostics LLC. Several coauthors disclosed various financial ties to multiple private-sector pharmaceutical and biomedical companies, including ImmunogenX.

Have you ever wished you could access all of our Crohn’s disease resources in one place? We’ve compiled our Crohn’s disease clinical guidance, continuing education resources, patient education, and FAQs into one convenient toolkit.

Toolkit includes clinical guidance on:

• Role of biomarkers for the management of Crohn’s disease
• Medical management of moderate to severe luminal and perianal fistulizing Crohn’s disease
• Diet and nutritional therapies in patients with IBD

Check it out at www.gastro.org/toolkit.

Have you ever wished you could access all of our Crohn’s disease resources in one place? We’ve compiled our Crohn’s disease clinical guidance, continuing education resources, patient education, and FAQs into one convenient toolkit.

Toolkit includes clinical guidance on:

• Role of biomarkers for the management of Crohn’s disease
• Medical management of moderate to severe luminal and perianal fistulizing Crohn’s disease
• Diet and nutritional therapies in patients with IBD

Check it out at www.gastro.org/toolkit.

Have you ever wished you could access all of our Crohn’s disease resources in one place? We’ve compiled our Crohn’s disease clinical guidance, continuing education resources, patient education, and FAQs into one convenient toolkit.

Toolkit includes clinical guidance on:

• Role of biomarkers for the management of Crohn’s disease
• Medical management of moderate to severe luminal and perianal fistulizing Crohn’s disease
• Diet and nutritional therapies in patients with IBD

Check it out at www.gastro.org/toolkit.

Children who ate a high-quality diet at 1 year of age were at a 25% reduced risk of developing inflammatory bowel disease (IBD) in later life, prospective pooled data from two Scandinavian birth cohorts suggested.

It appears important to feed children a quality diet at a very young age, in particular one rich in vegetables and fish, since by age three, only dietary fish intake had any impact on IBD risk.

Guo_Annie_SWE_web.jpg

Although high intakes of these two food categories in very early life correlated with lower IBD risk, exposure to sugar-sweetened beverages (SSBs) was associated with an increased risk. “While non-causal explanations for our results cannot be ruled out, these novel findings are consistent with the hypothesis that early-life diet, possibly mediated through changes in the gut microbiome, may affect the risk of developing IBD,” wrote lead author Annie Guo, a PhD candidate in the Department of Pediatrics, University of Gothenburg, Sweden, and colleagues. The report was published in Gut.

“This is a population-based study investigating the risk for IBD, rather than the specific effect of diet,” Ms. Guo said in an interview. “Therefore, the results are not enough on their own to be translated into individual advice that can be applicable in the clinic. However, the study supports current dietary guidelines for small children, that is, the intake of sugar should be limited and a higher intake of fish and vegetables is beneficial for overall health.”
 

Two-Cohort Study

The investigators prospectively recorded food-group information on children (just under half were female) from the All Babies in Southeast Sweden and The Norwegian Mother, Father and Child Cohort Study to assess the diet quality using a Healthy Eating Index and intake frequency. Parents answered questions about their offspring’s diet at ages 12-18 months and 30-36 months. Quality of diet was measured by intake of meat, fish, fruit, vegetables, dairy, sweets, snacks, and drinks.

The Swedish cohort included 21,700 children born between October 1997 and October 1999, while the Norwegian analysis included 114,500 children, 95,200 mothers, and 75,200 fathers recruited from across Norway from 1999 to 2008. In 1,304,433 person-years of follow-up, the researchers tracked 81,280 participants from birth to childhood and adolescence, with median follow-ups in the two cohorts ranging from 1 year of age to 21.3 years (Sweden) and to 15.2 years of age (Norway). Of these children, 307 were diagnosed with IBD: Crohn’s disease (CD; n = 131); ulcerative colitis (UC; n = 97); and IBD unclassified (n = 79).

Adjusting for parental IBD history, sex, origin, education, and maternal comorbidities, the study found:

• Compared with low-quality diet, both medium- and high-quality diets at 1 year were associated with a roughly 25% reduced risk for IBD (pooled adjusted hazard ratio [aHR], 0.75 [95% CI, 0.58-0.98] and 0.75 [0.56-1.0], respectively).
• The pooled aHR per increase of category was 0.86 (95% CI, 0.74-0.99). The pooled aHR for IBD in 1-year-olds with high vs low fish intake was 0.70 (95% CI, 0.49-1.0), and this diet showed an association with a reduced risk for UC (pooled aHR, 0.46; 95% CI, 0.21-0.99). Higher vegetable intake at 1 year was also associated with a risk reduction in IBD (HR, 0.72; 95% CI, 0.55-0.95). It has been hypothesized that intake of vegetables and vegetable fibers may have programming effects on the immune system.
• AutoWith 72% of children reportedly consuming SSBs at age 1, pooled aHRs showed that some vs no intake of SSBs was associated with an increased risk for later IBD (pooled aHR, 1.42; 95% CI, 1.05-1.90).
• There were no obvious associations between overall IBD or CD/UC risk and meat, dairy, fruit, grains, potatoes, and foods high in sugar and/or fat. Diet at age 3 years was not associated with incident IBD (pooled aHR, 1.02; 95% CI, 0.76-1.37), suggesting that the risk impact of diet is greatest on very young and vulnerable microbiomes.

Ms. Guo noted that a Swedish national survey among 4-year-olds found a mean SSB consumption of 187 g/d with a mean frequency of once daily. The most desired changes in food habits are a lower intake of soft drinks, sweets, crisps, cakes, and biscuits and an increase in the intake of fruits and vegetables. A similar Norwegian survey among 2-year-olds showed that SSBs were consumed by 36% of all children with a mean intake of 40 g/d.

The exact mechanism by which sugar affects the intestinal microbiota is not established. “However, what we do know is that an excessive intake of sugar can disrupt the balance of the gut microbiome,” Ms. Guo said. “And if the child has a high intake of foods with high in sugar, that also increases the chances that the child’s overall diet has a lower intake of other foods that contribute to a diverse microbiome such as fruits and vegetables.”

An ‘Elegant’ Study

In an accompanying editorial, gastroenterologist Ashwin N. Ananthakrishnan, MBBS, MPH, AGAF, of Mass General Brigham and the Mass General Research Institute, Boston, cautioned that accurately measuring food intake in very young children is difficult, and dietary questionnaires in this study did not address food additives and emulsifiers common in commercial baby food, which may play a role in the pathogenesis of IBD.

Ananthakrishnan_Ashwin_Bosto_web.jpg

Another study limitation is that the dietary questionnaire used has not been qualitatively or quantitatively validated against other more conventional methods, said Dr. Ananthakrishnan, who was not involved in the research.

Nevertheless, he called the study “elegant” and expanding of the data on the importance of this period in IBD development. “Although in the present study there was no association between diet at 3 years and development of IBD (in contrast to the association observed for dietary intake at 1 year), other prospective cohorts of adult-onset IBD have demonstrated an inverse association between vegetable or fish intake and reduced risk for CD while sugar-sweetened beverages have been linked to a higher risk for IBD.”

As to the question of recommending early preventive diet for IBD, “thus far, data on the impact of diet very early in childhood, outside of breastfeeding, on the risk for IBD has been lacking,” Dr. Ananthakrishnan said in an interview. “This important study highlights that diet as early as 1 year can modify subsequent risk for IBD. This raises the intriguing possibility of whether early changes in diet could be used, particularly in those at higher risk, to reduce or even prevent future development of IBD. Of course, more works needs to be done to define modifiability of diet as a risk factor, but this is an important supportive data.”

In his editorial, Dr. Ananthakrishnan stated that despite the absence of gold-standard interventional data demonstrating a benefit of dietary interventions, “in my opinion, it may still be reasonable to suggest such interventions to motivate individuals who incorporate several of the dietary patterns associated with lower risk for IBD from this and other studies. This includes ensuring adequate dietary fiber, particularly from fruits and vegetables, intake of fish, minimizing sugar-sweetened beverages and preferring fresh over processed and ultra-processed foods and snacks.” According to the study authors, their novel findings support further research on the role of childhood diet in the prevention of IBD.

The All Babies in Southeast Sweden Study is supported by Barndiabetesfonden (Swedish Child Diabetes Foundation), the Swedish Council for Working Life and Social Research, the Swedish Research Council, the Medical Research Council of Southeast Sweden, the JDRF Wallenberg Foundation, ALF and LFoU grants from Region Östergötland and Linköping University, and the Joanna Cocozza Foundation.

The Norwegian Mother, Father and Child Cohort Study is supported by the Norwegian Ministry of Health and Care Services and the Ministry of Education and Research.

Ms. Guo received grants from the Swedish Society for Medical Research and the Henning and Johan Throne-Holst Foundation to conduct this study. Co-author Karl Mårild has received funding from the Swedish Society for Medical Research, the Swedish Research Council, and ALF, Sweden’s medical research and education co-ordinating body. The authors declared no competing interests. Dr. Ananthakrishnan is supported by the National Institutes of Health, the Leona M. and Harry B. Helmsley Charitable Trust, and the Chleck Family Foundation. He has served on the scientific advisory board for Geneoscopy.

Children who ate a high-quality diet at 1 year of age were at a 25% reduced risk of developing inflammatory bowel disease (IBD) in later life, prospective pooled data from two Scandinavian birth cohorts suggested.

It appears important to feed children a quality diet at a very young age, in particular one rich in vegetables and fish, since by age three, only dietary fish intake had any impact on IBD risk.

Guo_Annie_SWE_web.jpg

Although high intakes of these two food categories in very early life correlated with lower IBD risk, exposure to sugar-sweetened beverages (SSBs) was associated with an increased risk. “While non-causal explanations for our results cannot be ruled out, these novel findings are consistent with the hypothesis that early-life diet, possibly mediated through changes in the gut microbiome, may affect the risk of developing IBD,” wrote lead author Annie Guo, a PhD candidate in the Department of Pediatrics, University of Gothenburg, Sweden, and colleagues. The report was published in Gut.

“This is a population-based study investigating the risk for IBD, rather than the specific effect of diet,” Ms. Guo said in an interview. “Therefore, the results are not enough on their own to be translated into individual advice that can be applicable in the clinic. However, the study supports current dietary guidelines for small children, that is, the intake of sugar should be limited and a higher intake of fish and vegetables is beneficial for overall health.”
 

Two-Cohort Study

The investigators prospectively recorded food-group information on children (just under half were female) from the All Babies in Southeast Sweden and The Norwegian Mother, Father and Child Cohort Study to assess the diet quality using a Healthy Eating Index and intake frequency. Parents answered questions about their offspring’s diet at ages 12-18 months and 30-36 months. Quality of diet was measured by intake of meat, fish, fruit, vegetables, dairy, sweets, snacks, and drinks.

The Swedish cohort included 21,700 children born between October 1997 and October 1999, while the Norwegian analysis included 114,500 children, 95,200 mothers, and 75,200 fathers recruited from across Norway from 1999 to 2008. In 1,304,433 person-years of follow-up, the researchers tracked 81,280 participants from birth to childhood and adolescence, with median follow-ups in the two cohorts ranging from 1 year of age to 21.3 years (Sweden) and to 15.2 years of age (Norway). Of these children, 307 were diagnosed with IBD: Crohn’s disease (CD; n = 131); ulcerative colitis (UC; n = 97); and IBD unclassified (n = 79).

Adjusting for parental IBD history, sex, origin, education, and maternal comorbidities, the study found:

• Compared with low-quality diet, both medium- and high-quality diets at 1 year were associated with a roughly 25% reduced risk for IBD (pooled adjusted hazard ratio [aHR], 0.75 [95% CI, 0.58-0.98] and 0.75 [0.56-1.0], respectively).
• The pooled aHR per increase of category was 0.86 (95% CI, 0.74-0.99). The pooled aHR for IBD in 1-year-olds with high vs low fish intake was 0.70 (95% CI, 0.49-1.0), and this diet showed an association with a reduced risk for UC (pooled aHR, 0.46; 95% CI, 0.21-0.99). Higher vegetable intake at 1 year was also associated with a risk reduction in IBD (HR, 0.72; 95% CI, 0.55-0.95). It has been hypothesized that intake of vegetables and vegetable fibers may have programming effects on the immune system.
• AutoWith 72% of children reportedly consuming SSBs at age 1, pooled aHRs showed that some vs no intake of SSBs was associated with an increased risk for later IBD (pooled aHR, 1.42; 95% CI, 1.05-1.90).
• There were no obvious associations between overall IBD or CD/UC risk and meat, dairy, fruit, grains, potatoes, and foods high in sugar and/or fat. Diet at age 3 years was not associated with incident IBD (pooled aHR, 1.02; 95% CI, 0.76-1.37), suggesting that the risk impact of diet is greatest on very young and vulnerable microbiomes.

Ms. Guo noted that a Swedish national survey among 4-year-olds found a mean SSB consumption of 187 g/d with a mean frequency of once daily. The most desired changes in food habits are a lower intake of soft drinks, sweets, crisps, cakes, and biscuits and an increase in the intake of fruits and vegetables. A similar Norwegian survey among 2-year-olds showed that SSBs were consumed by 36% of all children with a mean intake of 40 g/d.

The exact mechanism by which sugar affects the intestinal microbiota is not established. “However, what we do know is that an excessive intake of sugar can disrupt the balance of the gut microbiome,” Ms. Guo said. “And if the child has a high intake of foods with high in sugar, that also increases the chances that the child’s overall diet has a lower intake of other foods that contribute to a diverse microbiome such as fruits and vegetables.”

An ‘Elegant’ Study

In an accompanying editorial, gastroenterologist Ashwin N. Ananthakrishnan, MBBS, MPH, AGAF, of Mass General Brigham and the Mass General Research Institute, Boston, cautioned that accurately measuring food intake in very young children is difficult, and dietary questionnaires in this study did not address food additives and emulsifiers common in commercial baby food, which may play a role in the pathogenesis of IBD.

Ananthakrishnan_Ashwin_Bosto_web.jpg

Another study limitation is that the dietary questionnaire used has not been qualitatively or quantitatively validated against other more conventional methods, said Dr. Ananthakrishnan, who was not involved in the research.

Nevertheless, he called the study “elegant” and expanding of the data on the importance of this period in IBD development. “Although in the present study there was no association between diet at 3 years and development of IBD (in contrast to the association observed for dietary intake at 1 year), other prospective cohorts of adult-onset IBD have demonstrated an inverse association between vegetable or fish intake and reduced risk for CD while sugar-sweetened beverages have been linked to a higher risk for IBD.”

As to the question of recommending early preventive diet for IBD, “thus far, data on the impact of diet very early in childhood, outside of breastfeeding, on the risk for IBD has been lacking,” Dr. Ananthakrishnan said in an interview. “This important study highlights that diet as early as 1 year can modify subsequent risk for IBD. This raises the intriguing possibility of whether early changes in diet could be used, particularly in those at higher risk, to reduce or even prevent future development of IBD. Of course, more works needs to be done to define modifiability of diet as a risk factor, but this is an important supportive data.”

In his editorial, Dr. Ananthakrishnan stated that despite the absence of gold-standard interventional data demonstrating a benefit of dietary interventions, “in my opinion, it may still be reasonable to suggest such interventions to motivate individuals who incorporate several of the dietary patterns associated with lower risk for IBD from this and other studies. This includes ensuring adequate dietary fiber, particularly from fruits and vegetables, intake of fish, minimizing sugar-sweetened beverages and preferring fresh over processed and ultra-processed foods and snacks.” According to the study authors, their novel findings support further research on the role of childhood diet in the prevention of IBD.

The All Babies in Southeast Sweden Study is supported by Barndiabetesfonden (Swedish Child Diabetes Foundation), the Swedish Council for Working Life and Social Research, the Swedish Research Council, the Medical Research Council of Southeast Sweden, the JDRF Wallenberg Foundation, ALF and LFoU grants from Region Östergötland and Linköping University, and the Joanna Cocozza Foundation.

The Norwegian Mother, Father and Child Cohort Study is supported by the Norwegian Ministry of Health and Care Services and the Ministry of Education and Research.

Ms. Guo received grants from the Swedish Society for Medical Research and the Henning and Johan Throne-Holst Foundation to conduct this study. Co-author Karl Mårild has received funding from the Swedish Society for Medical Research, the Swedish Research Council, and ALF, Sweden’s medical research and education co-ordinating body. The authors declared no competing interests. Dr. Ananthakrishnan is supported by the National Institutes of Health, the Leona M. and Harry B. Helmsley Charitable Trust, and the Chleck Family Foundation. He has served on the scientific advisory board for Geneoscopy.

Children who ate a high-quality diet at 1 year of age were at a 25% reduced risk of developing inflammatory bowel disease (IBD) in later life, prospective pooled data from two Scandinavian birth cohorts suggested.

It appears important to feed children a quality diet at a very young age, in particular one rich in vegetables and fish, since by age three, only dietary fish intake had any impact on IBD risk.

Guo_Annie_SWE_web.jpg

Although high intakes of these two food categories in very early life correlated with lower IBD risk, exposure to sugar-sweetened beverages (SSBs) was associated with an increased risk. “While non-causal explanations for our results cannot be ruled out, these novel findings are consistent with the hypothesis that early-life diet, possibly mediated through changes in the gut microbiome, may affect the risk of developing IBD,” wrote lead author Annie Guo, a PhD candidate in the Department of Pediatrics, University of Gothenburg, Sweden, and colleagues. The report was published in Gut.

“This is a population-based study investigating the risk for IBD, rather than the specific effect of diet,” Ms. Guo said in an interview. “Therefore, the results are not enough on their own to be translated into individual advice that can be applicable in the clinic. However, the study supports current dietary guidelines for small children, that is, the intake of sugar should be limited and a higher intake of fish and vegetables is beneficial for overall health.”
 

Two-Cohort Study

The investigators prospectively recorded food-group information on children (just under half were female) from the All Babies in Southeast Sweden and The Norwegian Mother, Father and Child Cohort Study to assess the diet quality using a Healthy Eating Index and intake frequency. Parents answered questions about their offspring’s diet at ages 12-18 months and 30-36 months. Quality of diet was measured by intake of meat, fish, fruit, vegetables, dairy, sweets, snacks, and drinks.

The Swedish cohort included 21,700 children born between October 1997 and October 1999, while the Norwegian analysis included 114,500 children, 95,200 mothers, and 75,200 fathers recruited from across Norway from 1999 to 2008. In 1,304,433 person-years of follow-up, the researchers tracked 81,280 participants from birth to childhood and adolescence, with median follow-ups in the two cohorts ranging from 1 year of age to 21.3 years (Sweden) and to 15.2 years of age (Norway). Of these children, 307 were diagnosed with IBD: Crohn’s disease (CD; n = 131); ulcerative colitis (UC; n = 97); and IBD unclassified (n = 79).

Adjusting for parental IBD history, sex, origin, education, and maternal comorbidities, the study found:

• Compared with low-quality diet, both medium- and high-quality diets at 1 year were associated with a roughly 25% reduced risk for IBD (pooled adjusted hazard ratio [aHR], 0.75 [95% CI, 0.58-0.98] and 0.75 [0.56-1.0], respectively).
• The pooled aHR per increase of category was 0.86 (95% CI, 0.74-0.99). The pooled aHR for IBD in 1-year-olds with high vs low fish intake was 0.70 (95% CI, 0.49-1.0), and this diet showed an association with a reduced risk for UC (pooled aHR, 0.46; 95% CI, 0.21-0.99). Higher vegetable intake at 1 year was also associated with a risk reduction in IBD (HR, 0.72; 95% CI, 0.55-0.95). It has been hypothesized that intake of vegetables and vegetable fibers may have programming effects on the immune system.
• AutoWith 72% of children reportedly consuming SSBs at age 1, pooled aHRs showed that some vs no intake of SSBs was associated with an increased risk for later IBD (pooled aHR, 1.42; 95% CI, 1.05-1.90).
• There were no obvious associations between overall IBD or CD/UC risk and meat, dairy, fruit, grains, potatoes, and foods high in sugar and/or fat. Diet at age 3 years was not associated with incident IBD (pooled aHR, 1.02; 95% CI, 0.76-1.37), suggesting that the risk impact of diet is greatest on very young and vulnerable microbiomes.

Ms. Guo noted that a Swedish national survey among 4-year-olds found a mean SSB consumption of 187 g/d with a mean frequency of once daily. The most desired changes in food habits are a lower intake of soft drinks, sweets, crisps, cakes, and biscuits and an increase in the intake of fruits and vegetables. A similar Norwegian survey among 2-year-olds showed that SSBs were consumed by 36% of all children with a mean intake of 40 g/d.

The exact mechanism by which sugar affects the intestinal microbiota is not established. “However, what we do know is that an excessive intake of sugar can disrupt the balance of the gut microbiome,” Ms. Guo said. “And if the child has a high intake of foods with high in sugar, that also increases the chances that the child’s overall diet has a lower intake of other foods that contribute to a diverse microbiome such as fruits and vegetables.”

An ‘Elegant’ Study

In an accompanying editorial, gastroenterologist Ashwin N. Ananthakrishnan, MBBS, MPH, AGAF, of Mass General Brigham and the Mass General Research Institute, Boston, cautioned that accurately measuring food intake in very young children is difficult, and dietary questionnaires in this study did not address food additives and emulsifiers common in commercial baby food, which may play a role in the pathogenesis of IBD.

Ananthakrishnan_Ashwin_Bosto_web.jpg

Another study limitation is that the dietary questionnaire used has not been qualitatively or quantitatively validated against other more conventional methods, said Dr. Ananthakrishnan, who was not involved in the research.

Nevertheless, he called the study “elegant” and expanding of the data on the importance of this period in IBD development. “Although in the present study there was no association between diet at 3 years and development of IBD (in contrast to the association observed for dietary intake at 1 year), other prospective cohorts of adult-onset IBD have demonstrated an inverse association between vegetable or fish intake and reduced risk for CD while sugar-sweetened beverages have been linked to a higher risk for IBD.”

As to the question of recommending early preventive diet for IBD, “thus far, data on the impact of diet very early in childhood, outside of breastfeeding, on the risk for IBD has been lacking,” Dr. Ananthakrishnan said in an interview. “This important study highlights that diet as early as 1 year can modify subsequent risk for IBD. This raises the intriguing possibility of whether early changes in diet could be used, particularly in those at higher risk, to reduce or even prevent future development of IBD. Of course, more works needs to be done to define modifiability of diet as a risk factor, but this is an important supportive data.”

In his editorial, Dr. Ananthakrishnan stated that despite the absence of gold-standard interventional data demonstrating a benefit of dietary interventions, “in my opinion, it may still be reasonable to suggest such interventions to motivate individuals who incorporate several of the dietary patterns associated with lower risk for IBD from this and other studies. This includes ensuring adequate dietary fiber, particularly from fruits and vegetables, intake of fish, minimizing sugar-sweetened beverages and preferring fresh over processed and ultra-processed foods and snacks.” According to the study authors, their novel findings support further research on the role of childhood diet in the prevention of IBD.

The All Babies in Southeast Sweden Study is supported by Barndiabetesfonden (Swedish Child Diabetes Foundation), the Swedish Council for Working Life and Social Research, the Swedish Research Council, the Medical Research Council of Southeast Sweden, the JDRF Wallenberg Foundation, ALF and LFoU grants from Region Östergötland and Linköping University, and the Joanna Cocozza Foundation.

The Norwegian Mother, Father and Child Cohort Study is supported by the Norwegian Ministry of Health and Care Services and the Ministry of Education and Research.

Ms. Guo received grants from the Swedish Society for Medical Research and the Henning and Johan Throne-Holst Foundation to conduct this study. Co-author Karl Mårild has received funding from the Swedish Society for Medical Research, the Swedish Research Council, and ALF, Sweden’s medical research and education co-ordinating body. The authors declared no competing interests. Dr. Ananthakrishnan is supported by the National Institutes of Health, the Leona M. and Harry B. Helmsley Charitable Trust, and the Chleck Family Foundation. He has served on the scientific advisory board for Geneoscopy.

Gastroenterology

January 2024

Hirano I, et al; ASCENT WORKING GROUP. Ascending to New Heights for Novel Therapeutics for Eosinophilic Esophagitis. Gastroenterology. 2024 Jan;166(1):1-10. doi: 10.1053/j.gastro.2023.09.004. Epub 2023 Sep 9. PMID: 37690772; PMCID: PMC10872872.



Åkerström JH, et al. Antireflux Surgery Versus Antireflux Medication and Risk of Esophageal Adenocarcinoma in Patients With Barrett’s Esophagus. Gastroenterology. 2024 Jan;166(1):132-138.e3. doi: 10.1053/j.gastro.2023.08.050. Epub 2023 Sep 9. PMID: 37690771.



Barnes EL, et al; AGA Clinical Guidelines Committee. AGA Clinical Practice Guideline on the Management of Pouchitis and Inflammatory Pouch Disorders. Gastroenterology. 2024 Jan;166(1):59-85. doi: 10.1053/j.gastro.2023.10.015. PMID: 38128971.

February 2024

Yoo HW, et al. Helicobacter pylori Treatment and Gastric Cancer Risk After Endoscopic Resection of Dysplasia: A Nationwide Cohort Study. Gastroenterology. 2024 Feb;166(2):313-322.e3. doi: 10.1053/j.gastro.2023.10.013. Epub 2023 Oct 18. PMID: 37863270.



Yang J, et al. High Soluble Fiber Promotes Colorectal Tumorigenesis Through Modulating Gut Microbiota and Metabolites in Mice. Gastroenterology. 2024 Feb;166(2):323-337.e7. doi: 10.1053/j.gastro.2023.10.012. Epub 2023 Oct 18. PMID: 37858797.



Young E, et al. Texture and Color Enhancement Imaging Improves Colonic Adenoma Detection: A Multicenter Randomized Controlled Trial. Gastroenterology. 2024 Feb;166(2):338-340.e3. doi: 10.1053/j.gastro.2023.10.008. Epub 2023 Oct 14. PMID: 37839498.
 

Clinical Gastroenterology and Hepatology

January 2024

Overbeek KA, et al; Dutch Familial Pancreatic Cancer Surveillance Study work group. Intraductal Papillary Mucinous Neoplasms in High-Risk Individuals: Incidence, Growth Rate, and Malignancy Risk. Clin Gastroenterol Hepatol. 2024 Jan;22(1):62-71.e7. doi: 10.1016/j.cgh.2023.03.035. Epub 2023 Apr 7. PMID: 37031711.

Reddy CA, et al. Achalasia is Strongly Associated With Eosinophilic Esophagitis and Other Allergic Disorders. Clin Gastroenterol Hepatol. 2024 Jan;22(1):34-41.e2. doi: 10.1016/j.cgh.2023.06.013. Epub 2023 Jun 28. PMID: 37391057; PMCID: PMC10753026.

Thiruvengadam NR, et al. The Clinical Impact and Cost-Effectiveness of Surveillance of Incidentally Detected Gastric Intestinal Metaplasia: A Microsimulation Analysis. Clin Gastroenterol Hepatol. 2024 Jan;22(1):51-61. doi: 10.1016/j.cgh.2023.05.028. Epub 2023 Jun 9. Erratum in: Clin Gastroenterol Hepatol. 2024 Jan 19;: PMID: 37302442.

February 2024

Goodoory VC, et al. Systematic Review and Meta-analysis: Efficacy of Mesalamine in Irritable Bowel Syndrome. Clin Gastroenterol Hepatol. 2024 Feb;22(2):243-251.e5. doi: 10.1016/j.cgh.2023.02.014. Epub 2023 Feb 27. PMID: 36858143.

Brenner DM, et al. Development and Current State of Digital Therapeutics for Irritable Bowel Syndrome. Clin Gastroenterol Hepatol. 2024 Feb;22(2):222-234. doi: 10.1016/j.cgh.2023.09.013. Epub 2023 Sep 22. PMID: 37743035.
 

Techniques and Innovations in Gastrointestinal Endoscopy

January 2024

Ramirez PR, et al. Gaps and Improvement Opportunities in Post-Colonoscopy Communication. Tech Innov Gastrointest Endosc. 2024 Jan;26(1):90-92. doi: 10.1016/j.tige.2023.10.001. Epub 2023 Oct 22.

Gonzaga ER, et al. Gastric Peroral Endoscopic Myotomy (G-POEM) for the Management of Gastroparesis. Tech Innov Gastrointest Endosc. 2024 Jan; 26(1): 46-55. doi: 10.1016/j.tige.2023.09.002. Epub 2023 Oct 13.



Wang D, et al. Sphincterotomy vs Sham Procedure for Pain Relief in Sphincter of Oddi Dysfunction: Systematic Review and Meta-analysis. Tech Innov Gastrointest Endosc. 2024 Jan;26(1): 30-37. doi: 10.1016/j.tige.2023.10.003. Epub 2023 Nov 8.
 

Gastro Hep Advances

January 2024

Adeniran E, et al. Intense and Sustained Alcohol Consumption Associated With Acute Pancreatitis Warrants Early Intervention. Gastro Hep Advances. 2024 Jan;3(1):61-63. doi: 10.1016/j.gastha.2023.08.017. Epub 2023 Sep 2.

Alkhouri N, et al. A Novel Prescription Digital Therapeutic Option for the Treatment of Metabolic Dysfunction-Associated Steatotic Liver Disease. Gastro Hep Advances. 2024 Jan;3(1): 9-16. doi: 10.1016/j.gastha.2023.08.019. Epub 2023 Oct 1.

Gastroenterology

January 2024

Hirano I, et al; ASCENT WORKING GROUP. Ascending to New Heights for Novel Therapeutics for Eosinophilic Esophagitis. Gastroenterology. 2024 Jan;166(1):1-10. doi: 10.1053/j.gastro.2023.09.004. Epub 2023 Sep 9. PMID: 37690772; PMCID: PMC10872872.



Åkerström JH, et al. Antireflux Surgery Versus Antireflux Medication and Risk of Esophageal Adenocarcinoma in Patients With Barrett’s Esophagus. Gastroenterology. 2024 Jan;166(1):132-138.e3. doi: 10.1053/j.gastro.2023.08.050. Epub 2023 Sep 9. PMID: 37690771.



Barnes EL, et al; AGA Clinical Guidelines Committee. AGA Clinical Practice Guideline on the Management of Pouchitis and Inflammatory Pouch Disorders. Gastroenterology. 2024 Jan;166(1):59-85. doi: 10.1053/j.gastro.2023.10.015. PMID: 38128971.

February 2024

Yoo HW, et al. Helicobacter pylori Treatment and Gastric Cancer Risk After Endoscopic Resection of Dysplasia: A Nationwide Cohort Study. Gastroenterology. 2024 Feb;166(2):313-322.e3. doi: 10.1053/j.gastro.2023.10.013. Epub 2023 Oct 18. PMID: 37863270.



Yang J, et al. High Soluble Fiber Promotes Colorectal Tumorigenesis Through Modulating Gut Microbiota and Metabolites in Mice. Gastroenterology. 2024 Feb;166(2):323-337.e7. doi: 10.1053/j.gastro.2023.10.012. Epub 2023 Oct 18. PMID: 37858797.



Young E, et al. Texture and Color Enhancement Imaging Improves Colonic Adenoma Detection: A Multicenter Randomized Controlled Trial. Gastroenterology. 2024 Feb;166(2):338-340.e3. doi: 10.1053/j.gastro.2023.10.008. Epub 2023 Oct 14. PMID: 37839498.
 

Clinical Gastroenterology and Hepatology

January 2024

Overbeek KA, et al; Dutch Familial Pancreatic Cancer Surveillance Study work group. Intraductal Papillary Mucinous Neoplasms in High-Risk Individuals: Incidence, Growth Rate, and Malignancy Risk. Clin Gastroenterol Hepatol. 2024 Jan;22(1):62-71.e7. doi: 10.1016/j.cgh.2023.03.035. Epub 2023 Apr 7. PMID: 37031711.

Reddy CA, et al. Achalasia is Strongly Associated With Eosinophilic Esophagitis and Other Allergic Disorders. Clin Gastroenterol Hepatol. 2024 Jan;22(1):34-41.e2. doi: 10.1016/j.cgh.2023.06.013. Epub 2023 Jun 28. PMID: 37391057; PMCID: PMC10753026.

Thiruvengadam NR, et al. The Clinical Impact and Cost-Effectiveness of Surveillance of Incidentally Detected Gastric Intestinal Metaplasia: A Microsimulation Analysis. Clin Gastroenterol Hepatol. 2024 Jan;22(1):51-61. doi: 10.1016/j.cgh.2023.05.028. Epub 2023 Jun 9. Erratum in: Clin Gastroenterol Hepatol. 2024 Jan 19;: PMID: 37302442.

February 2024

Goodoory VC, et al. Systematic Review and Meta-analysis: Efficacy of Mesalamine in Irritable Bowel Syndrome. Clin Gastroenterol Hepatol. 2024 Feb;22(2):243-251.e5. doi: 10.1016/j.cgh.2023.02.014. Epub 2023 Feb 27. PMID: 36858143.

Brenner DM, et al. Development and Current State of Digital Therapeutics for Irritable Bowel Syndrome. Clin Gastroenterol Hepatol. 2024 Feb;22(2):222-234. doi: 10.1016/j.cgh.2023.09.013. Epub 2023 Sep 22. PMID: 37743035.
 

Techniques and Innovations in Gastrointestinal Endoscopy

January 2024

Ramirez PR, et al. Gaps and Improvement Opportunities in Post-Colonoscopy Communication. Tech Innov Gastrointest Endosc. 2024 Jan;26(1):90-92. doi: 10.1016/j.tige.2023.10.001. Epub 2023 Oct 22.

Gonzaga ER, et al. Gastric Peroral Endoscopic Myotomy (G-POEM) for the Management of Gastroparesis. Tech Innov Gastrointest Endosc. 2024 Jan; 26(1): 46-55. doi: 10.1016/j.tige.2023.09.002. Epub 2023 Oct 13.



Wang D, et al. Sphincterotomy vs Sham Procedure for Pain Relief in Sphincter of Oddi Dysfunction: Systematic Review and Meta-analysis. Tech Innov Gastrointest Endosc. 2024 Jan;26(1): 30-37. doi: 10.1016/j.tige.2023.10.003. Epub 2023 Nov 8.
 

Gastro Hep Advances

January 2024

Adeniran E, et al. Intense and Sustained Alcohol Consumption Associated With Acute Pancreatitis Warrants Early Intervention. Gastro Hep Advances. 2024 Jan;3(1):61-63. doi: 10.1016/j.gastha.2023.08.017. Epub 2023 Sep 2.

Alkhouri N, et al. A Novel Prescription Digital Therapeutic Option for the Treatment of Metabolic Dysfunction-Associated Steatotic Liver Disease. Gastro Hep Advances. 2024 Jan;3(1): 9-16. doi: 10.1016/j.gastha.2023.08.019. Epub 2023 Oct 1.

Gastroenterology

January 2024

Hirano I, et al; ASCENT WORKING GROUP. Ascending to New Heights for Novel Therapeutics for Eosinophilic Esophagitis. Gastroenterology. 2024 Jan;166(1):1-10. doi: 10.1053/j.gastro.2023.09.004. Epub 2023 Sep 9. PMID: 37690772; PMCID: PMC10872872.



Åkerström JH, et al. Antireflux Surgery Versus Antireflux Medication and Risk of Esophageal Adenocarcinoma in Patients With Barrett’s Esophagus. Gastroenterology. 2024 Jan;166(1):132-138.e3. doi: 10.1053/j.gastro.2023.08.050. Epub 2023 Sep 9. PMID: 37690771.



Barnes EL, et al; AGA Clinical Guidelines Committee. AGA Clinical Practice Guideline on the Management of Pouchitis and Inflammatory Pouch Disorders. Gastroenterology. 2024 Jan;166(1):59-85. doi: 10.1053/j.gastro.2023.10.015. PMID: 38128971.

February 2024

Yoo HW, et al. Helicobacter pylori Treatment and Gastric Cancer Risk After Endoscopic Resection of Dysplasia: A Nationwide Cohort Study. Gastroenterology. 2024 Feb;166(2):313-322.e3. doi: 10.1053/j.gastro.2023.10.013. Epub 2023 Oct 18. PMID: 37863270.



Yang J, et al. High Soluble Fiber Promotes Colorectal Tumorigenesis Through Modulating Gut Microbiota and Metabolites in Mice. Gastroenterology. 2024 Feb;166(2):323-337.e7. doi: 10.1053/j.gastro.2023.10.012. Epub 2023 Oct 18. PMID: 37858797.



Young E, et al. Texture and Color Enhancement Imaging Improves Colonic Adenoma Detection: A Multicenter Randomized Controlled Trial. Gastroenterology. 2024 Feb;166(2):338-340.e3. doi: 10.1053/j.gastro.2023.10.008. Epub 2023 Oct 14. PMID: 37839498.
 

Clinical Gastroenterology and Hepatology

January 2024

Overbeek KA, et al; Dutch Familial Pancreatic Cancer Surveillance Study work group. Intraductal Papillary Mucinous Neoplasms in High-Risk Individuals: Incidence, Growth Rate, and Malignancy Risk. Clin Gastroenterol Hepatol. 2024 Jan;22(1):62-71.e7. doi: 10.1016/j.cgh.2023.03.035. Epub 2023 Apr 7. PMID: 37031711.

Reddy CA, et al. Achalasia is Strongly Associated With Eosinophilic Esophagitis and Other Allergic Disorders. Clin Gastroenterol Hepatol. 2024 Jan;22(1):34-41.e2. doi: 10.1016/j.cgh.2023.06.013. Epub 2023 Jun 28. PMID: 37391057; PMCID: PMC10753026.

Thiruvengadam NR, et al. The Clinical Impact and Cost-Effectiveness of Surveillance of Incidentally Detected Gastric Intestinal Metaplasia: A Microsimulation Analysis. Clin Gastroenterol Hepatol. 2024 Jan;22(1):51-61. doi: 10.1016/j.cgh.2023.05.028. Epub 2023 Jun 9. Erratum in: Clin Gastroenterol Hepatol. 2024 Jan 19;: PMID: 37302442.

February 2024

Goodoory VC, et al. Systematic Review and Meta-analysis: Efficacy of Mesalamine in Irritable Bowel Syndrome. Clin Gastroenterol Hepatol. 2024 Feb;22(2):243-251.e5. doi: 10.1016/j.cgh.2023.02.014. Epub 2023 Feb 27. PMID: 36858143.

Brenner DM, et al. Development and Current State of Digital Therapeutics for Irritable Bowel Syndrome. Clin Gastroenterol Hepatol. 2024 Feb;22(2):222-234. doi: 10.1016/j.cgh.2023.09.013. Epub 2023 Sep 22. PMID: 37743035.
 

Techniques and Innovations in Gastrointestinal Endoscopy

January 2024

Ramirez PR, et al. Gaps and Improvement Opportunities in Post-Colonoscopy Communication. Tech Innov Gastrointest Endosc. 2024 Jan;26(1):90-92. doi: 10.1016/j.tige.2023.10.001. Epub 2023 Oct 22.

Gonzaga ER, et al. Gastric Peroral Endoscopic Myotomy (G-POEM) for the Management of Gastroparesis. Tech Innov Gastrointest Endosc. 2024 Jan; 26(1): 46-55. doi: 10.1016/j.tige.2023.09.002. Epub 2023 Oct 13.



Wang D, et al. Sphincterotomy vs Sham Procedure for Pain Relief in Sphincter of Oddi Dysfunction: Systematic Review and Meta-analysis. Tech Innov Gastrointest Endosc. 2024 Jan;26(1): 30-37. doi: 10.1016/j.tige.2023.10.003. Epub 2023 Nov 8.
 

Gastro Hep Advances

January 2024

Adeniran E, et al. Intense and Sustained Alcohol Consumption Associated With Acute Pancreatitis Warrants Early Intervention. Gastro Hep Advances. 2024 Jan;3(1):61-63. doi: 10.1016/j.gastha.2023.08.017. Epub 2023 Sep 2.

Alkhouri N, et al. A Novel Prescription Digital Therapeutic Option for the Treatment of Metabolic Dysfunction-Associated Steatotic Liver Disease. Gastro Hep Advances. 2024 Jan;3(1): 9-16. doi: 10.1016/j.gastha.2023.08.019. Epub 2023 Oct 1.

Pelvic floor dysfunction (PFD) represents a spectrum of symptoms involving sensory and emptying abnormalities of the bowel and bladder and pelvic organ prolapse. The pelvic floor refers to a group of muscles that spans the pelvic outlet, providing support to the pelvic organs and coordinating constrictor mechanisms to control urination and defecation. Symptoms reported by patients experiencing PFD include involuntary loss of stool or urine, incomplete emptying of the bowel and bladder, a sensation of fullness, bulging in the vagina, and sexual dysfunction.¹

As such, symptoms related to PFD are very common concerns raised by patients to their gastroenterologists. Data from the National Health and Nutrition Examination Survey show that 23.7% of women over the age of 20 had at least one symptom of PFD.² Unfortunately, patients experiencing pelvic floor dysfunction often are hesitant to seek care because of embarrassment or perception that limited treatment options exist for their symptoms.
 

Pelvic Floor Anatomy

Regions of the pelvis are often referred to by anatomic compartment: anterior (bladder and urethra), middle (vagina and uterus or prostate), and posterior (colon, rectum, and anal canal). Supporting these compartments is the levator ani, a muscle group that is used synonymously with the term “pelvic diaphragm.”

Khan_ Ayesha_TX_web.jpg

Continence of stool is provided by the anal sphincter muscles and the puborectalis muscle, which wraps around the posterior aspect of the anorectal canal. Damage to the musculature or sensory perception to this area may result in fecal incontinence. Defecation is a coordinated process during which the abdominal and rectal muscles contract, while the anal sphincter muscles and puborectalis simultaneously relax. A disturbance in neuromuscular coordination (dyssynergic defecation) or structural pathology such as pelvic organ prolapse may lead to obstructed defecation.

PFD is thought to be a result of one or more insults to the pelvic floor such as chronic straining, childbirth, iatrogenic injury, or systemic disease such as diabetes.³
 

Evaluation of PFD Symptoms

Patients presenting with suspected PFD necessitate a comprehensive interdisciplinary assessment. In addition to obtaining a medical, surgical, and obstetric history, details about symptoms and lifestyle should include toileting habits, diet, and physical activity. The Pelvic Floor Distress Inventory (PFDI-20) is a commonly used tool that can be employed in the clinical setting.⁴

A pelvic exam can reveal pelvic organ prolapse and other mucosal pathology. The Pelvic Organ Prolapse Quantification System (POP-Q) is a widely used classification system for describing pelvic organ prolapse.⁵ Protrusion of the rectal wall into the vagina is referred to as a rectocele, while prolapse of small bowel into the upper posterior wall of the vagina is called an enterocele. While the finding of a rectocele on exam is common in parous women and may not cause any symptoms, a larger rectocele may cause a sensation of incomplete evacuation of stool.

Menon_ Raakhi_TX_web.jpg

Initial Management

A stepwise approach to the management of PFD can allow many patients to be effectively treated without the need for surgical intervention. For patients reporting liquid stool consistency, the evaluation should pivot toward the workup and management of diarrhea, which can easily overwhelm continence mechanisms and cause fecal incontinence. Fiber supplementation to normalize stool consistency is considered first-line therapy for patients presenting with both fecal incontinence and obstructed defecation. Other tools for fecal incontinence include avoiding foods that trigger diarrhea and use of loperamide.⁶ For patients with obstructed defecation, a trial of laxatives can be followed by a prescription agent if needed, such as a secretagogue or prokinetic.⁷

Vaginal splinting is a technique that can be used in patients with rectocele, whereby a finger is inserted into the vagina and pressure is applied on the posterior vaginal wall toward the rectum. Reducing the rectocele can facilitate emptying stool from the rectum and prevent leakage of retained stool.⁸ Similarly, use of rectal irrigation enemas can also help clear retained stool.

Pelvic floor physical therapists examine the strength, coordination, and tone of the pelvic floor muscles. When hypertonic musculature is present, manual interventions may be performed including trigger point release, myofascial release, and dry needling.⁹ When hypotonic musculature or dyssynergia is present, strengthening and neuromuscular re-education are recommended. Biofeedback can be administered via surface electromyography and/or balloon training to improve rectal sensitivity. Proper defecation techniques, including positioning, breathing, and behavioral modifications, improve clinical outcomes.

Allen_Lindsay_TX_web.jpg

Diagnostic Testing

For patients who do not improve with conservative management, further testing is recommended to characterize the underlying pathology. Typically, anorectal manometry (ARM) is performed in conjunction with the balloon expulsion test and imaging. Each modality has its strengths and limitations (see Table 1).

167838 Table_web.jpg

ARM allows for the assessment of rectal sensation and recto-anal pressures and coordination.¹⁰

Dynamic imaging, by barium defecography under fluoroscopy or MRI, captures anatomy at rest and with simulated defecation to identify pelvic organ prolapse, compartmental defects, and organ mobility.¹¹ Endoanal ultrasonography is considered in patients experiencing fecal incontinence to evaluate the integrity of the anal sphincter muscles.
 

Minimally Invasive Procedures and Surgical Options for PFD

Functional abnormalities such as dyssynergia often coexist with structural abnormalities. Because structural abnormalities are commonly found in asymptomatic patients, noninvasive functional therapy, such as pelvic floor physical therapy and anorectal biofeedback, are preferred prior to surgical repair of a structural finding. For patients with fecal incontinence, sacral nerve stimulation (SNS) has emerged as a preferred therapy due to demonstrated efficacy in symptom improvement.¹² Sphincteroplasty is reserved for those with acute sphincter injury or failure of SNS.

Corning_Brooke_TX_web.jpg

In patients with findings of intussusception, prolapse, or rectocele that have not responded to conservative therapy, referral for surgical repair may be considered. While the specific surgical approach will depend on many factors, the goal is typically excision and/or suspension of rectal tissue and reinforcement of the rectovaginal septum.

Pelvic floor disorders and related gastrointestinal complaints are very common, and likely to increase with increasing longevity and an aging population. It is critical that we are equipped with the available knowledge and tools to provide these patients with optimal care.

Dr. Khan, Dr. Menon, Dr. Allen, and Dr. Corning are based at the University of Texas Medical Branch in Galveston, Texas. They report no conflicts of interest.

References

1. Grimes WR and Stratton M. Pelvic floor dysfunction. 2023 Jun 26. In: StatPearls [Internet]. Treasure Island (Fla.): StatPearls Publishing; 2024 Jan. PMID: 32644672.

2. Nygaard I et al. Prevalence of symptomatic pelvic floor disorders in US women. JAMA. 2008 Sep 17. doi: 10.1001/jama.300.11.1311.

3. Lawrence JM et al. Pelvic floor disorders, diabetes, and obesity in women: Findings from the Kaiser Permanente Continence Associated Risk Epidemiology Study. Diabetes Care. 2007 Oct. doi: 10.2337/dc07-0262.

4. Barber MD et al. Short forms of two condition-specific quality-of-life questionnaires for women with pelvic floor disorders (PFDI-20 and PFIQ-7). Am J Obstet Gynecol. 2005 Jul. doi: 10.1016/j.ajog.2004.12.025.

5. Persu C et al. Pelvic Organ Prolapse Quantification System (POP-Q) — A new era in pelvic prolapse staging. J Med Life. 2011 Jan-Mar. PMID: 21505577.

6. Wald A et al. ACG Clinical Guidelines: Management of benign anorectal disorders. Am J Gastroenterol. 2021 Oct 1. doi: 10.14309/ajg.0000000000001507.

7. Bharucha AE and Lacy BE. Mechanisms, evaluation, and management of chronic constipation. Gastroenterology. 2020 Apr. doi: 10.1053/j.gastro.2019.12.034.

8. Menees S and Chey WD. Fecal incontinence: Pathogenesis, diagnosis, and updated treatment strategies. Gastroenterol Clin North Am. 2022 Mar. doi: 10.1016/j.gtc.2021.10.005.

9. Wallace SL et al. Pelvic floor physical therapy in the treatment of pelvic floor dysfunction in women. Curr Opin Obstet Gynecol. 2019 Dec. doi: 10.1097/GCO.0000000000000584.

10. Carrington EV et al. The international anorectal physiology working group (IAPWG) recommendations: Standardized testing protocol and the London classification for disorders of anorectal function. Neurogastroenterol Motil. 2020 Jan. doi: 10.1111/nmo.13679.

11. El Sayed RF et al. Magnetic resonance imaging of pelvic floor dysfunction — Joint recommendations of the ESUR and ESGAR Pelvic Floor Working Group. Eur Radiol. 2017 May. doi: 10.1007/s00330-016-4471-7.

12. Thaha MA et al. Sacral nerve stimulation for faecal incontinence and constipation in adults. Cochrane Database Syst Rev. 2015 Aug 24. doi: 10.1002/14651858.CD004464.pub3.

13. Chiarioni G et al. Biofeedback benefits only patients with outlet dysfunction, not patients with isolated slow transit constipation. Gastroenterology. 2005 Jul. doi: 10.1053/j.gastro.2005.05.015.

14. Grossi U et al. Diagnostic accuracy study of anorectal manometry for diagnosis of dyssynergic defecation. Gut. 2016 Mar. doi: 10.1136/gutjnl-2014-308835.

15. Albuquerque A. Endoanal ultrasonography in fecal incontinence: Current and future perspectives. World J Gastrointest Endosc. 2015 Jun 10. doi: 10.4253/wjge.v7.i6.575.

Pelvic floor dysfunction (PFD) represents a spectrum of symptoms involving sensory and emptying abnormalities of the bowel and bladder and pelvic organ prolapse. The pelvic floor refers to a group of muscles that spans the pelvic outlet, providing support to the pelvic organs and coordinating constrictor mechanisms to control urination and defecation. Symptoms reported by patients experiencing PFD include involuntary loss of stool or urine, incomplete emptying of the bowel and bladder, a sensation of fullness, bulging in the vagina, and sexual dysfunction.¹

As such, symptoms related to PFD are very common concerns raised by patients to their gastroenterologists. Data from the National Health and Nutrition Examination Survey show that 23.7% of women over the age of 20 had at least one symptom of PFD.² Unfortunately, patients experiencing pelvic floor dysfunction often are hesitant to seek care because of embarrassment or perception that limited treatment options exist for their symptoms.
 

Pelvic Floor Anatomy

Regions of the pelvis are often referred to by anatomic compartment: anterior (bladder and urethra), middle (vagina and uterus or prostate), and posterior (colon, rectum, and anal canal). Supporting these compartments is the levator ani, a muscle group that is used synonymously with the term “pelvic diaphragm.”

Khan_ Ayesha_TX_web.jpg

Continence of stool is provided by the anal sphincter muscles and the puborectalis muscle, which wraps around the posterior aspect of the anorectal canal. Damage to the musculature or sensory perception to this area may result in fecal incontinence. Defecation is a coordinated process during which the abdominal and rectal muscles contract, while the anal sphincter muscles and puborectalis simultaneously relax. A disturbance in neuromuscular coordination (dyssynergic defecation) or structural pathology such as pelvic organ prolapse may lead to obstructed defecation.

PFD is thought to be a result of one or more insults to the pelvic floor such as chronic straining, childbirth, iatrogenic injury, or systemic disease such as diabetes.³
 

Evaluation of PFD Symptoms

Patients presenting with suspected PFD necessitate a comprehensive interdisciplinary assessment. In addition to obtaining a medical, surgical, and obstetric history, details about symptoms and lifestyle should include toileting habits, diet, and physical activity. The Pelvic Floor Distress Inventory (PFDI-20) is a commonly used tool that can be employed in the clinical setting.⁴

A pelvic exam can reveal pelvic organ prolapse and other mucosal pathology. The Pelvic Organ Prolapse Quantification System (POP-Q) is a widely used classification system for describing pelvic organ prolapse.⁵ Protrusion of the rectal wall into the vagina is referred to as a rectocele, while prolapse of small bowel into the upper posterior wall of the vagina is called an enterocele. While the finding of a rectocele on exam is common in parous women and may not cause any symptoms, a larger rectocele may cause a sensation of incomplete evacuation of stool.

Menon_ Raakhi_TX_web.jpg

Initial Management

A stepwise approach to the management of PFD can allow many patients to be effectively treated without the need for surgical intervention. For patients reporting liquid stool consistency, the evaluation should pivot toward the workup and management of diarrhea, which can easily overwhelm continence mechanisms and cause fecal incontinence. Fiber supplementation to normalize stool consistency is considered first-line therapy for patients presenting with both fecal incontinence and obstructed defecation. Other tools for fecal incontinence include avoiding foods that trigger diarrhea and use of loperamide.⁶ For patients with obstructed defecation, a trial of laxatives can be followed by a prescription agent if needed, such as a secretagogue or prokinetic.⁷

Vaginal splinting is a technique that can be used in patients with rectocele, whereby a finger is inserted into the vagina and pressure is applied on the posterior vaginal wall toward the rectum. Reducing the rectocele can facilitate emptying stool from the rectum and prevent leakage of retained stool.⁸ Similarly, use of rectal irrigation enemas can also help clear retained stool.

Pelvic floor physical therapists examine the strength, coordination, and tone of the pelvic floor muscles. When hypertonic musculature is present, manual interventions may be performed including trigger point release, myofascial release, and dry needling.⁹ When hypotonic musculature or dyssynergia is present, strengthening and neuromuscular re-education are recommended. Biofeedback can be administered via surface electromyography and/or balloon training to improve rectal sensitivity. Proper defecation techniques, including positioning, breathing, and behavioral modifications, improve clinical outcomes.

Allen_Lindsay_TX_web.jpg

Diagnostic Testing

For patients who do not improve with conservative management, further testing is recommended to characterize the underlying pathology. Typically, anorectal manometry (ARM) is performed in conjunction with the balloon expulsion test and imaging. Each modality has its strengths and limitations (see Table 1).

167838 Table_web.jpg

ARM allows for the assessment of rectal sensation and recto-anal pressures and coordination.¹⁰

Dynamic imaging, by barium defecography under fluoroscopy or MRI, captures anatomy at rest and with simulated defecation to identify pelvic organ prolapse, compartmental defects, and organ mobility.¹¹ Endoanal ultrasonography is considered in patients experiencing fecal incontinence to evaluate the integrity of the anal sphincter muscles.
 

Minimally Invasive Procedures and Surgical Options for PFD

Functional abnormalities such as dyssynergia often coexist with structural abnormalities. Because structural abnormalities are commonly found in asymptomatic patients, noninvasive functional therapy, such as pelvic floor physical therapy and anorectal biofeedback, are preferred prior to surgical repair of a structural finding. For patients with fecal incontinence, sacral nerve stimulation (SNS) has emerged as a preferred therapy due to demonstrated efficacy in symptom improvement.¹² Sphincteroplasty is reserved for those with acute sphincter injury or failure of SNS.

Corning_Brooke_TX_web.jpg

In patients with findings of intussusception, prolapse, or rectocele that have not responded to conservative therapy, referral for surgical repair may be considered. While the specific surgical approach will depend on many factors, the goal is typically excision and/or suspension of rectal tissue and reinforcement of the rectovaginal septum.

Pelvic floor disorders and related gastrointestinal complaints are very common, and likely to increase with increasing longevity and an aging population. It is critical that we are equipped with the available knowledge and tools to provide these patients with optimal care.

Dr. Khan, Dr. Menon, Dr. Allen, and Dr. Corning are based at the University of Texas Medical Branch in Galveston, Texas. They report no conflicts of interest.

References

1. Grimes WR and Stratton M. Pelvic floor dysfunction. 2023 Jun 26. In: StatPearls [Internet]. Treasure Island (Fla.): StatPearls Publishing; 2024 Jan. PMID: 32644672.

2. Nygaard I et al. Prevalence of symptomatic pelvic floor disorders in US women. JAMA. 2008 Sep 17. doi: 10.1001/jama.300.11.1311.

3. Lawrence JM et al. Pelvic floor disorders, diabetes, and obesity in women: Findings from the Kaiser Permanente Continence Associated Risk Epidemiology Study. Diabetes Care. 2007 Oct. doi: 10.2337/dc07-0262.

4. Barber MD et al. Short forms of two condition-specific quality-of-life questionnaires for women with pelvic floor disorders (PFDI-20 and PFIQ-7). Am J Obstet Gynecol. 2005 Jul. doi: 10.1016/j.ajog.2004.12.025.

5. Persu C et al. Pelvic Organ Prolapse Quantification System (POP-Q) — A new era in pelvic prolapse staging. J Med Life. 2011 Jan-Mar. PMID: 21505577.

6. Wald A et al. ACG Clinical Guidelines: Management of benign anorectal disorders. Am J Gastroenterol. 2021 Oct 1. doi: 10.14309/ajg.0000000000001507.

7. Bharucha AE and Lacy BE. Mechanisms, evaluation, and management of chronic constipation. Gastroenterology. 2020 Apr. doi: 10.1053/j.gastro.2019.12.034.

8. Menees S and Chey WD. Fecal incontinence: Pathogenesis, diagnosis, and updated treatment strategies. Gastroenterol Clin North Am. 2022 Mar. doi: 10.1016/j.gtc.2021.10.005.

9. Wallace SL et al. Pelvic floor physical therapy in the treatment of pelvic floor dysfunction in women. Curr Opin Obstet Gynecol. 2019 Dec. doi: 10.1097/GCO.0000000000000584.

10. Carrington EV et al. The international anorectal physiology working group (IAPWG) recommendations: Standardized testing protocol and the London classification for disorders of anorectal function. Neurogastroenterol Motil. 2020 Jan. doi: 10.1111/nmo.13679.

11. El Sayed RF et al. Magnetic resonance imaging of pelvic floor dysfunction — Joint recommendations of the ESUR and ESGAR Pelvic Floor Working Group. Eur Radiol. 2017 May. doi: 10.1007/s00330-016-4471-7.

12. Thaha MA et al. Sacral nerve stimulation for faecal incontinence and constipation in adults. Cochrane Database Syst Rev. 2015 Aug 24. doi: 10.1002/14651858.CD004464.pub3.

13. Chiarioni G et al. Biofeedback benefits only patients with outlet dysfunction, not patients with isolated slow transit constipation. Gastroenterology. 2005 Jul. doi: 10.1053/j.gastro.2005.05.015.

14. Grossi U et al. Diagnostic accuracy study of anorectal manometry for diagnosis of dyssynergic defecation. Gut. 2016 Mar. doi: 10.1136/gutjnl-2014-308835.

15. Albuquerque A. Endoanal ultrasonography in fecal incontinence: Current and future perspectives. World J Gastrointest Endosc. 2015 Jun 10. doi: 10.4253/wjge.v7.i6.575.

Pelvic floor dysfunction (PFD) represents a spectrum of symptoms involving sensory and emptying abnormalities of the bowel and bladder and pelvic organ prolapse. The pelvic floor refers to a group of muscles that spans the pelvic outlet, providing support to the pelvic organs and coordinating constrictor mechanisms to control urination and defecation. Symptoms reported by patients experiencing PFD include involuntary loss of stool or urine, incomplete emptying of the bowel and bladder, a sensation of fullness, bulging in the vagina, and sexual dysfunction.¹

As such, symptoms related to PFD are very common concerns raised by patients to their gastroenterologists. Data from the National Health and Nutrition Examination Survey show that 23.7% of women over the age of 20 had at least one symptom of PFD.² Unfortunately, patients experiencing pelvic floor dysfunction often are hesitant to seek care because of embarrassment or perception that limited treatment options exist for their symptoms.
 

Pelvic Floor Anatomy

Regions of the pelvis are often referred to by anatomic compartment: anterior (bladder and urethra), middle (vagina and uterus or prostate), and posterior (colon, rectum, and anal canal). Supporting these compartments is the levator ani, a muscle group that is used synonymously with the term “pelvic diaphragm.”

Khan_ Ayesha_TX_web.jpg

Continence of stool is provided by the anal sphincter muscles and the puborectalis muscle, which wraps around the posterior aspect of the anorectal canal. Damage to the musculature or sensory perception to this area may result in fecal incontinence. Defecation is a coordinated process during which the abdominal and rectal muscles contract, while the anal sphincter muscles and puborectalis simultaneously relax. A disturbance in neuromuscular coordination (dyssynergic defecation) or structural pathology such as pelvic organ prolapse may lead to obstructed defecation.

PFD is thought to be a result of one or more insults to the pelvic floor such as chronic straining, childbirth, iatrogenic injury, or systemic disease such as diabetes.³
 

Evaluation of PFD Symptoms

Patients presenting with suspected PFD necessitate a comprehensive interdisciplinary assessment. In addition to obtaining a medical, surgical, and obstetric history, details about symptoms and lifestyle should include toileting habits, diet, and physical activity. The Pelvic Floor Distress Inventory (PFDI-20) is a commonly used tool that can be employed in the clinical setting.⁴

A pelvic exam can reveal pelvic organ prolapse and other mucosal pathology. The Pelvic Organ Prolapse Quantification System (POP-Q) is a widely used classification system for describing pelvic organ prolapse.⁵ Protrusion of the rectal wall into the vagina is referred to as a rectocele, while prolapse of small bowel into the upper posterior wall of the vagina is called an enterocele. While the finding of a rectocele on exam is common in parous women and may not cause any symptoms, a larger rectocele may cause a sensation of incomplete evacuation of stool.

Menon_ Raakhi_TX_web.jpg

Initial Management

A stepwise approach to the management of PFD can allow many patients to be effectively treated without the need for surgical intervention. For patients reporting liquid stool consistency, the evaluation should pivot toward the workup and management of diarrhea, which can easily overwhelm continence mechanisms and cause fecal incontinence. Fiber supplementation to normalize stool consistency is considered first-line therapy for patients presenting with both fecal incontinence and obstructed defecation. Other tools for fecal incontinence include avoiding foods that trigger diarrhea and use of loperamide.⁶ For patients with obstructed defecation, a trial of laxatives can be followed by a prescription agent if needed, such as a secretagogue or prokinetic.⁷

Vaginal splinting is a technique that can be used in patients with rectocele, whereby a finger is inserted into the vagina and pressure is applied on the posterior vaginal wall toward the rectum. Reducing the rectocele can facilitate emptying stool from the rectum and prevent leakage of retained stool.⁸ Similarly, use of rectal irrigation enemas can also help clear retained stool.

Pelvic floor physical therapists examine the strength, coordination, and tone of the pelvic floor muscles. When hypertonic musculature is present, manual interventions may be performed including trigger point release, myofascial release, and dry needling.⁹ When hypotonic musculature or dyssynergia is present, strengthening and neuromuscular re-education are recommended. Biofeedback can be administered via surface electromyography and/or balloon training to improve rectal sensitivity. Proper defecation techniques, including positioning, breathing, and behavioral modifications, improve clinical outcomes.

Allen_Lindsay_TX_web.jpg

Diagnostic Testing

For patients who do not improve with conservative management, further testing is recommended to characterize the underlying pathology. Typically, anorectal manometry (ARM) is performed in conjunction with the balloon expulsion test and imaging. Each modality has its strengths and limitations (see Table 1).

167838 Table_web.jpg

ARM allows for the assessment of rectal sensation and recto-anal pressures and coordination.¹⁰

Dynamic imaging, by barium defecography under fluoroscopy or MRI, captures anatomy at rest and with simulated defecation to identify pelvic organ prolapse, compartmental defects, and organ mobility.¹¹ Endoanal ultrasonography is considered in patients experiencing fecal incontinence to evaluate the integrity of the anal sphincter muscles.
 

Minimally Invasive Procedures and Surgical Options for PFD

Functional abnormalities such as dyssynergia often coexist with structural abnormalities. Because structural abnormalities are commonly found in asymptomatic patients, noninvasive functional therapy, such as pelvic floor physical therapy and anorectal biofeedback, are preferred prior to surgical repair of a structural finding. For patients with fecal incontinence, sacral nerve stimulation (SNS) has emerged as a preferred therapy due to demonstrated efficacy in symptom improvement.¹² Sphincteroplasty is reserved for those with acute sphincter injury or failure of SNS.

Corning_Brooke_TX_web.jpg

In patients with findings of intussusception, prolapse, or rectocele that have not responded to conservative therapy, referral for surgical repair may be considered. While the specific surgical approach will depend on many factors, the goal is typically excision and/or suspension of rectal tissue and reinforcement of the rectovaginal septum.

Pelvic floor disorders and related gastrointestinal complaints are very common, and likely to increase with increasing longevity and an aging population. It is critical that we are equipped with the available knowledge and tools to provide these patients with optimal care.

Dr. Khan, Dr. Menon, Dr. Allen, and Dr. Corning are based at the University of Texas Medical Branch in Galveston, Texas. They report no conflicts of interest.

References

1. Grimes WR and Stratton M. Pelvic floor dysfunction. 2023 Jun 26. In: StatPearls [Internet]. Treasure Island (Fla.): StatPearls Publishing; 2024 Jan. PMID: 32644672.

2. Nygaard I et al. Prevalence of symptomatic pelvic floor disorders in US women. JAMA. 2008 Sep 17. doi: 10.1001/jama.300.11.1311.

3. Lawrence JM et al. Pelvic floor disorders, diabetes, and obesity in women: Findings from the Kaiser Permanente Continence Associated Risk Epidemiology Study. Diabetes Care. 2007 Oct. doi: 10.2337/dc07-0262.

4. Barber MD et al. Short forms of two condition-specific quality-of-life questionnaires for women with pelvic floor disorders (PFDI-20 and PFIQ-7). Am J Obstet Gynecol. 2005 Jul. doi: 10.1016/j.ajog.2004.12.025.

5. Persu C et al. Pelvic Organ Prolapse Quantification System (POP-Q) — A new era in pelvic prolapse staging. J Med Life. 2011 Jan-Mar. PMID: 21505577.

6. Wald A et al. ACG Clinical Guidelines: Management of benign anorectal disorders. Am J Gastroenterol. 2021 Oct 1. doi: 10.14309/ajg.0000000000001507.

7. Bharucha AE and Lacy BE. Mechanisms, evaluation, and management of chronic constipation. Gastroenterology. 2020 Apr. doi: 10.1053/j.gastro.2019.12.034.

8. Menees S and Chey WD. Fecal incontinence: Pathogenesis, diagnosis, and updated treatment strategies. Gastroenterol Clin North Am. 2022 Mar. doi: 10.1016/j.gtc.2021.10.005.

9. Wallace SL et al. Pelvic floor physical therapy in the treatment of pelvic floor dysfunction in women. Curr Opin Obstet Gynecol. 2019 Dec. doi: 10.1097/GCO.0000000000000584.

10. Carrington EV et al. The international anorectal physiology working group (IAPWG) recommendations: Standardized testing protocol and the London classification for disorders of anorectal function. Neurogastroenterol Motil. 2020 Jan. doi: 10.1111/nmo.13679.

11. El Sayed RF et al. Magnetic resonance imaging of pelvic floor dysfunction — Joint recommendations of the ESUR and ESGAR Pelvic Floor Working Group. Eur Radiol. 2017 May. doi: 10.1007/s00330-016-4471-7.

12. Thaha MA et al. Sacral nerve stimulation for faecal incontinence and constipation in adults. Cochrane Database Syst Rev. 2015 Aug 24. doi: 10.1002/14651858.CD004464.pub3.

13. Chiarioni G et al. Biofeedback benefits only patients with outlet dysfunction, not patients with isolated slow transit constipation. Gastroenterology. 2005 Jul. doi: 10.1053/j.gastro.2005.05.015.

14. Grossi U et al. Diagnostic accuracy study of anorectal manometry for diagnosis of dyssynergic defecation. Gut. 2016 Mar. doi: 10.1136/gutjnl-2014-308835.

15. Albuquerque A. Endoanal ultrasonography in fecal incontinence: Current and future perspectives. World J Gastrointest Endosc. 2015 Jun 10. doi: 10.4253/wjge.v7.i6.575.

Companies selling gut microbiome tests directly to consumers offer up a variety of claims to promote their products.

“We analyze the trillions of microbes in your gut microflora and craft a unique formula for your unique gut needs,” one says. “Get actionable dietary, supplement, and lifestyle recommendations from our microbiome experts based on your results, tailored to mom and baby’s biomarkers. ... Any family member like dads or siblings are welcome too,” says another.

The companies assert that they can improve gut health by offering individuals personalized treatments based on their gut microbiome test results. The trouble is, no provider, company, or technology can reliably do that yet.
 

Clinical Implications, Not Applications

The microbiome is the “constellation of microorganisms that call the human body home,” including many strains of bacteria, fungi, and viruses. That constellation comprises some 39 trillion cells.

Although knowledge is increasing on the oral, cutaneous, and vaginal microbiomes, the gut microbiome is arguably the most studied. However, while research is increasingly demonstrating that the gut microbiome has clinical implications, much work needs to be done before reliable applications based on that research are available.

But lack of scientific evidence and validity hasn’t stopped a growing number of companies across the globe from offering direct-to-consumer (DTC) microbiome tests, Erik C. von Rosenvinge, MD, AGAF, a professor at the University of Maryland School of Medicine and chief of gastroenterology at the VA Maryland Health Care System, Baltimore, said in an interview.

“If you go to their websites, even if it’s not stated overtly, these companies at least give the impression that they’re providing actionable, useful information,” he said. “The sites recommend microbiome testing, and often supplements, probiotics, or other products that they sell. And consumers are told they need to be tested again once they start taking any of these products to see if they’re receiving any benefit.”

Dr. von Rosenvinge and colleagues authored a recent article in Science  arguing that DTC microbiome tests “lack analytical and clinical validity” — and yet regulation of the industry has been “generally ignored.” They identified 31 companies globally, 17 of which are based in the United States, claiming to have products and/or services aimed at changing the intestinal microbiome.
 

Unreliable, Unregulated

The lack of reliability has been shown by experts who have tested the tests.

“People have taken the same stool sample, sent it to multiple companies, and gotten different results back,” Dr. von Rosenvinge said. “People also have taken a stool sample and sent it to the same company under two different names and received two different results. If the test is unreliable at its foundational level, it’s hard to use it in any clinical way.”

Test users’ methods and the companies’ procedures can affect the results, Dina Kao, MD, a professor at the University of Alberta, Edmonton, Alberta, Canada, said in an interview.

“So many biases can be introduced at every single step of the way, starting from how the stool sample was collected and how it’s preserved or not being preserved, because that can introduce a lot of noise that would change the analyses. Which primer they’re using to amplify the signals and which bioinformatic pipeline they use are also important,” said Dr. Kao, who presented at the recent Gut Microbiota for Health World Summit, organized by the American Gastroenterological Association (AGA) and the European Society of Neurogastroenterology and Motility (ESNM).

Different investigators and companies use different technologies, so it’s very difficult to compare them and to create a standard, said Mahmoud Ghannoum, PhD, a professor in the dermatology and pathology departments at Case Western Reserve University School of Medicine and director of the Center for Medical Mycology at University Hospitals in Cleveland.

The complexity of the gut microbiome makes test standardization more difficult than it is when just one organism is involved, Dr. Ghannoum, who chaired the antifungal subcommittee at the Clinical and Laboratory Standards Institute, said in an interview.

“Even though many researchers are focusing on bacteria, we also have fungi and viruses. We need standardization of methods for testing these organisms if we want to have regulations,” said Dr. Ghannoum, a cofounder of BIOHM, a microbiome company that offers nondiagnostic tests and markets a variety of probiotics, prebiotics, and immunity supplements. BIOHM is one of the 31 companies identified by Dr. von Rosenvinge and colleagues, as noted above.

Dr. Ghannoum believes that taking a systematic approach could facilitate standardization and, ultimately, regulation of the DTC microbiome testing products. He and his colleagues described such an approach by outlining the stages for designing probiotics capable of modulating the microbiome in chronic diseases, using Crohn’s disease as a model. Their strategy involved the following steps:

• Using primary microbiome data to identify, by abundance, the microorganisms underlying dysbiosis.
• Gaining insight into the interactions among the identified pathogens.
• Conducting a correlation analysis to identify potential lead probiotic strains that antagonize these pathogens and discovering metabolites that can interrupt their interactions.
• Creating a prototype formulation for testing.
• Validating the efficacy of the candidate formulation via preclinical in vitro and in vivo testing.
• Conducting clinical testing.

Dr. Ghannoum recommends that companies use a similar process “to provide evidence that what they are doing will be helpful, not only for them but also for the reputation of the whole industry.”
 

Potential Pitfalls

Whether test results from commercial companies are positioned as wellness aids or diagnostic tools, providing advice based on the results “is where the danger can really come in,” Dr. Kao said. “There is still so much we don’t know about which microbial signatures are associated with each condition.”

“Even when we have a solution, like the Crohn’s exclusion diet, a physician doesn’t know enough of the nuances to give advice to a patient,” she said. “That really should be done under the guidance of an expert dietitian. And if a company is selling probiotics, I personally feel that’s not ethical. I’m pretty sure there’s always going to be some kind of conflict of interest.”

Supplements and probiotics are generally safe, but negative consequences can occur, Dr. von Rosenvinge noted.

“We occasionally see people who end up with liver problems as a result of certain supplements, and rarely, probiotics have been associated with infections from those organisms, usually in those with a compromised immune system,” he said.

Other risks include people taking supplements or probiotics when they actually have a medically treatable condition or delays in diagnosis of a potentially serious underlying condition, such as colon cancer, he said. Some patients may stop taking their traditional medication in favor of taking supplements or may experience a drug-supplement interaction if they take both.
 

What to Tell Patients

“Doctors should be advising against this testing for their patients,” gastroenterologist Colleen R. Kelly, MD, AGAF, Brigham and Women’s Hospital, Boston, said in an interview. “I explain to patients that these tests are not validated and are clinically meaningless data and not worth the money. There is a reason they are not covered by insurance.

Kelly_Colleen_WEB.jpg

“Recommendations to purchase probiotics or supplements manufactured by the testing company to ‘restore a balanced or healthy microbiome’ clearly seem like a scam,” she added. “I believe some of these companies are capitalizing on patients who are desperate for answers to explain chronic symptoms, such as bloating in irritable bowel syndrome.”

Dr. von Rosenvinge said that the message to patients “is that the science isn’t there yet to support using the results of these tests in a meaningful way. We believe the microbiome is very important in health and disease, but the tests themselves in their current state are not as reliable and reproducible as we would like.”

When patients come in with test results, the first question a clinician should ask is what led them to seek out this type of information in the first place, Dr. von Rosenvinge said.

“Our patient focus groups suggested that many have not gotten clear, satisfactory answers from traditional medicine,” he said. “We don’t have a single test that says, yes, you have irritable bowel syndrome, or no, you don’t. We might suggest things that are helpful for some people and are less helpful for others.”

Dr. Kelly said she worries that “there are snake oil salesmen and cons out there who will gladly take your money. These may be smart people, capable of doing very high-level testing, and even producing very detailed and accurate results, but that doesn’t mean we know what to do with them.”

She hopes to see a microbiome-based diagnostic test in the future, particularly if the ability to therapeutically manipulate the gut microbiome in various diseases becomes a reality.
 

Educate Clinicians, Companies

More education is needed on the subject, so we can become “microbial clinicians,” Dr. Kao said.

“The microbiome never came up when I was going through my medical education,” she said. But we, and the next generation of physicians, “need to at least be able to understand the basics.

“Hopefully, one day, we will be in a position where we can have meaningful interpretations of the test results and make some kind of meaningful dietary interventions,” Dr. Kao added.

As for clinicians who are currently ordering these tests and products directly from the DTC companies, Dr. Kao said, “I roll my eyes.”

Dr. Ghannoum reiterated that companies offering microbiome tests and products also need to be educated and encouraged to use systematic approaches to product development and interpretation.

“Companies should be open to calls from clinicians and be ready to explain findings on a report, as well as the basis for any recommendations,” he said.

Dr. von Rosenvinge, Dr. Kao, and Dr. Kelly had no relevant conflicts of interest. Dr. Ghannoum is a cofounder of BIOHM.

A version of this article appeared on Medscape.com.

Companies selling gut microbiome tests directly to consumers offer up a variety of claims to promote their products.

“We analyze the trillions of microbes in your gut microflora and craft a unique formula for your unique gut needs,” one says. “Get actionable dietary, supplement, and lifestyle recommendations from our microbiome experts based on your results, tailored to mom and baby’s biomarkers. ... Any family member like dads or siblings are welcome too,” says another.

The companies assert that they can improve gut health by offering individuals personalized treatments based on their gut microbiome test results. The trouble is, no provider, company, or technology can reliably do that yet.
 

Clinical Implications, Not Applications

The microbiome is the “constellation of microorganisms that call the human body home,” including many strains of bacteria, fungi, and viruses. That constellation comprises some 39 trillion cells.

Although knowledge is increasing on the oral, cutaneous, and vaginal microbiomes, the gut microbiome is arguably the most studied. However, while research is increasingly demonstrating that the gut microbiome has clinical implications, much work needs to be done before reliable applications based on that research are available.

But lack of scientific evidence and validity hasn’t stopped a growing number of companies across the globe from offering direct-to-consumer (DTC) microbiome tests, Erik C. von Rosenvinge, MD, AGAF, a professor at the University of Maryland School of Medicine and chief of gastroenterology at the VA Maryland Health Care System, Baltimore, said in an interview.

“If you go to their websites, even if it’s not stated overtly, these companies at least give the impression that they’re providing actionable, useful information,” he said. “The sites recommend microbiome testing, and often supplements, probiotics, or other products that they sell. And consumers are told they need to be tested again once they start taking any of these products to see if they’re receiving any benefit.”

Dr. von Rosenvinge and colleagues authored a recent article in Science  arguing that DTC microbiome tests “lack analytical and clinical validity” — and yet regulation of the industry has been “generally ignored.” They identified 31 companies globally, 17 of which are based in the United States, claiming to have products and/or services aimed at changing the intestinal microbiome.
 

Unreliable, Unregulated

The lack of reliability has been shown by experts who have tested the tests.

“People have taken the same stool sample, sent it to multiple companies, and gotten different results back,” Dr. von Rosenvinge said. “People also have taken a stool sample and sent it to the same company under two different names and received two different results. If the test is unreliable at its foundational level, it’s hard to use it in any clinical way.”

Test users’ methods and the companies’ procedures can affect the results, Dina Kao, MD, a professor at the University of Alberta, Edmonton, Alberta, Canada, said in an interview.

“So many biases can be introduced at every single step of the way, starting from how the stool sample was collected and how it’s preserved or not being preserved, because that can introduce a lot of noise that would change the analyses. Which primer they’re using to amplify the signals and which bioinformatic pipeline they use are also important,” said Dr. Kao, who presented at the recent Gut Microbiota for Health World Summit, organized by the American Gastroenterological Association (AGA) and the European Society of Neurogastroenterology and Motility (ESNM).

Different investigators and companies use different technologies, so it’s very difficult to compare them and to create a standard, said Mahmoud Ghannoum, PhD, a professor in the dermatology and pathology departments at Case Western Reserve University School of Medicine and director of the Center for Medical Mycology at University Hospitals in Cleveland.

The complexity of the gut microbiome makes test standardization more difficult than it is when just one organism is involved, Dr. Ghannoum, who chaired the antifungal subcommittee at the Clinical and Laboratory Standards Institute, said in an interview.

“Even though many researchers are focusing on bacteria, we also have fungi and viruses. We need standardization of methods for testing these organisms if we want to have regulations,” said Dr. Ghannoum, a cofounder of BIOHM, a microbiome company that offers nondiagnostic tests and markets a variety of probiotics, prebiotics, and immunity supplements. BIOHM is one of the 31 companies identified by Dr. von Rosenvinge and colleagues, as noted above.

Dr. Ghannoum believes that taking a systematic approach could facilitate standardization and, ultimately, regulation of the DTC microbiome testing products. He and his colleagues described such an approach by outlining the stages for designing probiotics capable of modulating the microbiome in chronic diseases, using Crohn’s disease as a model. Their strategy involved the following steps:

• Using primary microbiome data to identify, by abundance, the microorganisms underlying dysbiosis.
• Gaining insight into the interactions among the identified pathogens.
• Conducting a correlation analysis to identify potential lead probiotic strains that antagonize these pathogens and discovering metabolites that can interrupt their interactions.
• Creating a prototype formulation for testing.
• Validating the efficacy of the candidate formulation via preclinical in vitro and in vivo testing.
• Conducting clinical testing.

Dr. Ghannoum recommends that companies use a similar process “to provide evidence that what they are doing will be helpful, not only for them but also for the reputation of the whole industry.”
 

Potential Pitfalls

Whether test results from commercial companies are positioned as wellness aids or diagnostic tools, providing advice based on the results “is where the danger can really come in,” Dr. Kao said. “There is still so much we don’t know about which microbial signatures are associated with each condition.”

“Even when we have a solution, like the Crohn’s exclusion diet, a physician doesn’t know enough of the nuances to give advice to a patient,” she said. “That really should be done under the guidance of an expert dietitian. And if a company is selling probiotics, I personally feel that’s not ethical. I’m pretty sure there’s always going to be some kind of conflict of interest.”

Supplements and probiotics are generally safe, but negative consequences can occur, Dr. von Rosenvinge noted.

“We occasionally see people who end up with liver problems as a result of certain supplements, and rarely, probiotics have been associated with infections from those organisms, usually in those with a compromised immune system,” he said.

Other risks include people taking supplements or probiotics when they actually have a medically treatable condition or delays in diagnosis of a potentially serious underlying condition, such as colon cancer, he said. Some patients may stop taking their traditional medication in favor of taking supplements or may experience a drug-supplement interaction if they take both.
 

What to Tell Patients

“Doctors should be advising against this testing for their patients,” gastroenterologist Colleen R. Kelly, MD, AGAF, Brigham and Women’s Hospital, Boston, said in an interview. “I explain to patients that these tests are not validated and are clinically meaningless data and not worth the money. There is a reason they are not covered by insurance.

Kelly_Colleen_WEB.jpg

“Recommendations to purchase probiotics or supplements manufactured by the testing company to ‘restore a balanced or healthy microbiome’ clearly seem like a scam,” she added. “I believe some of these companies are capitalizing on patients who are desperate for answers to explain chronic symptoms, such as bloating in irritable bowel syndrome.”

Dr. von Rosenvinge said that the message to patients “is that the science isn’t there yet to support using the results of these tests in a meaningful way. We believe the microbiome is very important in health and disease, but the tests themselves in their current state are not as reliable and reproducible as we would like.”

When patients come in with test results, the first question a clinician should ask is what led them to seek out this type of information in the first place, Dr. von Rosenvinge said.

“Our patient focus groups suggested that many have not gotten clear, satisfactory answers from traditional medicine,” he said. “We don’t have a single test that says, yes, you have irritable bowel syndrome, or no, you don’t. We might suggest things that are helpful for some people and are less helpful for others.”

Dr. Kelly said she worries that “there are snake oil salesmen and cons out there who will gladly take your money. These may be smart people, capable of doing very high-level testing, and even producing very detailed and accurate results, but that doesn’t mean we know what to do with them.”

She hopes to see a microbiome-based diagnostic test in the future, particularly if the ability to therapeutically manipulate the gut microbiome in various diseases becomes a reality.
 

Educate Clinicians, Companies

More education is needed on the subject, so we can become “microbial clinicians,” Dr. Kao said.

“The microbiome never came up when I was going through my medical education,” she said. But we, and the next generation of physicians, “need to at least be able to understand the basics.

“Hopefully, one day, we will be in a position where we can have meaningful interpretations of the test results and make some kind of meaningful dietary interventions,” Dr. Kao added.

As for clinicians who are currently ordering these tests and products directly from the DTC companies, Dr. Kao said, “I roll my eyes.”

Dr. Ghannoum reiterated that companies offering microbiome tests and products also need to be educated and encouraged to use systematic approaches to product development and interpretation.

“Companies should be open to calls from clinicians and be ready to explain findings on a report, as well as the basis for any recommendations,” he said.

Dr. von Rosenvinge, Dr. Kao, and Dr. Kelly had no relevant conflicts of interest. Dr. Ghannoum is a cofounder of BIOHM.

A version of this article appeared on Medscape.com.

Companies selling gut microbiome tests directly to consumers offer up a variety of claims to promote their products.

“We analyze the trillions of microbes in your gut microflora and craft a unique formula for your unique gut needs,” one says. “Get actionable dietary, supplement, and lifestyle recommendations from our microbiome experts based on your results, tailored to mom and baby’s biomarkers. ... Any family member like dads or siblings are welcome too,” says another.

The companies assert that they can improve gut health by offering individuals personalized treatments based on their gut microbiome test results. The trouble is, no provider, company, or technology can reliably do that yet.
 

Clinical Implications, Not Applications

The microbiome is the “constellation of microorganisms that call the human body home,” including many strains of bacteria, fungi, and viruses. That constellation comprises some 39 trillion cells.

Although knowledge is increasing on the oral, cutaneous, and vaginal microbiomes, the gut microbiome is arguably the most studied. However, while research is increasingly demonstrating that the gut microbiome has clinical implications, much work needs to be done before reliable applications based on that research are available.

But lack of scientific evidence and validity hasn’t stopped a growing number of companies across the globe from offering direct-to-consumer (DTC) microbiome tests, Erik C. von Rosenvinge, MD, AGAF, a professor at the University of Maryland School of Medicine and chief of gastroenterology at the VA Maryland Health Care System, Baltimore, said in an interview.

“If you go to their websites, even if it’s not stated overtly, these companies at least give the impression that they’re providing actionable, useful information,” he said. “The sites recommend microbiome testing, and often supplements, probiotics, or other products that they sell. And consumers are told they need to be tested again once they start taking any of these products to see if they’re receiving any benefit.”

Dr. von Rosenvinge and colleagues authored a recent article in Science  arguing that DTC microbiome tests “lack analytical and clinical validity” — and yet regulation of the industry has been “generally ignored.” They identified 31 companies globally, 17 of which are based in the United States, claiming to have products and/or services aimed at changing the intestinal microbiome.
 

Unreliable, Unregulated

The lack of reliability has been shown by experts who have tested the tests.

“People have taken the same stool sample, sent it to multiple companies, and gotten different results back,” Dr. von Rosenvinge said. “People also have taken a stool sample and sent it to the same company under two different names and received two different results. If the test is unreliable at its foundational level, it’s hard to use it in any clinical way.”

Test users’ methods and the companies’ procedures can affect the results, Dina Kao, MD, a professor at the University of Alberta, Edmonton, Alberta, Canada, said in an interview.

“So many biases can be introduced at every single step of the way, starting from how the stool sample was collected and how it’s preserved or not being preserved, because that can introduce a lot of noise that would change the analyses. Which primer they’re using to amplify the signals and which bioinformatic pipeline they use are also important,” said Dr. Kao, who presented at the recent Gut Microbiota for Health World Summit, organized by the American Gastroenterological Association (AGA) and the European Society of Neurogastroenterology and Motility (ESNM).

Different investigators and companies use different technologies, so it’s very difficult to compare them and to create a standard, said Mahmoud Ghannoum, PhD, a professor in the dermatology and pathology departments at Case Western Reserve University School of Medicine and director of the Center for Medical Mycology at University Hospitals in Cleveland.

The complexity of the gut microbiome makes test standardization more difficult than it is when just one organism is involved, Dr. Ghannoum, who chaired the antifungal subcommittee at the Clinical and Laboratory Standards Institute, said in an interview.

“Even though many researchers are focusing on bacteria, we also have fungi and viruses. We need standardization of methods for testing these organisms if we want to have regulations,” said Dr. Ghannoum, a cofounder of BIOHM, a microbiome company that offers nondiagnostic tests and markets a variety of probiotics, prebiotics, and immunity supplements. BIOHM is one of the 31 companies identified by Dr. von Rosenvinge and colleagues, as noted above.

Dr. Ghannoum believes that taking a systematic approach could facilitate standardization and, ultimately, regulation of the DTC microbiome testing products. He and his colleagues described such an approach by outlining the stages for designing probiotics capable of modulating the microbiome in chronic diseases, using Crohn’s disease as a model. Their strategy involved the following steps:

• Using primary microbiome data to identify, by abundance, the microorganisms underlying dysbiosis.
• Gaining insight into the interactions among the identified pathogens.
• Conducting a correlation analysis to identify potential lead probiotic strains that antagonize these pathogens and discovering metabolites that can interrupt their interactions.
• Creating a prototype formulation for testing.
• Validating the efficacy of the candidate formulation via preclinical in vitro and in vivo testing.
• Conducting clinical testing.

Dr. Ghannoum recommends that companies use a similar process “to provide evidence that what they are doing will be helpful, not only for them but also for the reputation of the whole industry.”
 

Potential Pitfalls

Whether test results from commercial companies are positioned as wellness aids or diagnostic tools, providing advice based on the results “is where the danger can really come in,” Dr. Kao said. “There is still so much we don’t know about which microbial signatures are associated with each condition.”

“Even when we have a solution, like the Crohn’s exclusion diet, a physician doesn’t know enough of the nuances to give advice to a patient,” she said. “That really should be done under the guidance of an expert dietitian. And if a company is selling probiotics, I personally feel that’s not ethical. I’m pretty sure there’s always going to be some kind of conflict of interest.”

Supplements and probiotics are generally safe, but negative consequences can occur, Dr. von Rosenvinge noted.

“We occasionally see people who end up with liver problems as a result of certain supplements, and rarely, probiotics have been associated with infections from those organisms, usually in those with a compromised immune system,” he said.

Other risks include people taking supplements or probiotics when they actually have a medically treatable condition or delays in diagnosis of a potentially serious underlying condition, such as colon cancer, he said. Some patients may stop taking their traditional medication in favor of taking supplements or may experience a drug-supplement interaction if they take both.
 

What to Tell Patients

“Doctors should be advising against this testing for their patients,” gastroenterologist Colleen R. Kelly, MD, AGAF, Brigham and Women’s Hospital, Boston, said in an interview. “I explain to patients that these tests are not validated and are clinically meaningless data and not worth the money. There is a reason they are not covered by insurance.

Kelly_Colleen_WEB.jpg

“Recommendations to purchase probiotics or supplements manufactured by the testing company to ‘restore a balanced or healthy microbiome’ clearly seem like a scam,” she added. “I believe some of these companies are capitalizing on patients who are desperate for answers to explain chronic symptoms, such as bloating in irritable bowel syndrome.”

Dr. von Rosenvinge said that the message to patients “is that the science isn’t there yet to support using the results of these tests in a meaningful way. We believe the microbiome is very important in health and disease, but the tests themselves in their current state are not as reliable and reproducible as we would like.”

When patients come in with test results, the first question a clinician should ask is what led them to seek out this type of information in the first place, Dr. von Rosenvinge said.

“Our patient focus groups suggested that many have not gotten clear, satisfactory answers from traditional medicine,” he said. “We don’t have a single test that says, yes, you have irritable bowel syndrome, or no, you don’t. We might suggest things that are helpful for some people and are less helpful for others.”

Dr. Kelly said she worries that “there are snake oil salesmen and cons out there who will gladly take your money. These may be smart people, capable of doing very high-level testing, and even producing very detailed and accurate results, but that doesn’t mean we know what to do with them.”

She hopes to see a microbiome-based diagnostic test in the future, particularly if the ability to therapeutically manipulate the gut microbiome in various diseases becomes a reality.
 

Educate Clinicians, Companies

More education is needed on the subject, so we can become “microbial clinicians,” Dr. Kao said.

“The microbiome never came up when I was going through my medical education,” she said. But we, and the next generation of physicians, “need to at least be able to understand the basics.

“Hopefully, one day, we will be in a position where we can have meaningful interpretations of the test results and make some kind of meaningful dietary interventions,” Dr. Kao added.

As for clinicians who are currently ordering these tests and products directly from the DTC companies, Dr. Kao said, “I roll my eyes.”

Dr. Ghannoum reiterated that companies offering microbiome tests and products also need to be educated and encouraged to use systematic approaches to product development and interpretation.

“Companies should be open to calls from clinicians and be ready to explain findings on a report, as well as the basis for any recommendations,” he said.

Dr. von Rosenvinge, Dr. Kao, and Dr. Kelly had no relevant conflicts of interest. Dr. Ghannoum is a cofounder of BIOHM.

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved the subcutaneous administration of vedolizumab (Entyvio) for maintenance therapy in adults with moderately to severely active Crohn’s disease (CD) after induction therapy with intravenous (IV) vedolizumab. 

The move follows the FDA’s approval last year of subcutaneous vedolizumab for maintenance treatment of adults with moderately to severely active ulcerative colitis (UC). 

The humanized immunoglobulin G1 monoclonal antibody is available as a single-dose prefilled pen (Entyvio Pen).

The FDA first approved the IV formulation of the biologic in 2014 for patients with moderate to severe UC and CD who cannot tolerate other therapies or in whom such therapies have failed. 

The approval of subcutaneous vedolizumab for maintenance treatment of CD is based on the phase 3, randomized, double-blind, placebo-controlled VISIBLE 2 trial.

The trial enrolled 409 adult patients with moderately to severely active CD who had clinical response at week 6 following two doses of open-label IV vedolizumab at weeks 0 and 2. 

At week 6, they were randomly allocated in a 2:1 ratio to receive vedolizumab 108 mg administered by subcutaneous injection or placebo every 2 weeks. The primary endpoint was clinical remission at week 52, which was defined as a total Crohn’s Disease Activity Index score ≤ 150.

The results showed that significantly more patients receiving subcutaneous vedolizumab than placebo achieved long-term clinical remission (48% vs 34%; P < .01), the company said in a news release. 

The safety profile of subcutaneous vedolizumab is generally consistent with the known safety profile of IV vedolizumab, with the addition of injection-site reactions (including injection-site erythema, rash, pruritus, swelling, bruising, hematoma, pain, urticaria, and edema).

“Crohn’s disease is a complex and usually progressive disease for which an appropriate management plan is critical. My primary goal as a clinician is always to get patients to achieve remission,” Timothy Ritter, MD, senior medical director, GI Alliance Research, and assistant professor of medicine, Burnett School of Medicine at TCU, Fort Worth, Texas, said in the news release.

Ritter_Timothy_TX_web.jpg

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved the subcutaneous administration of vedolizumab (Entyvio) for maintenance therapy in adults with moderately to severely active Crohn’s disease (CD) after induction therapy with intravenous (IV) vedolizumab. 

The move follows the FDA’s approval last year of subcutaneous vedolizumab for maintenance treatment of adults with moderately to severely active ulcerative colitis (UC). 

The humanized immunoglobulin G1 monoclonal antibody is available as a single-dose prefilled pen (Entyvio Pen).

The FDA first approved the IV formulation of the biologic in 2014 for patients with moderate to severe UC and CD who cannot tolerate other therapies or in whom such therapies have failed. 

The approval of subcutaneous vedolizumab for maintenance treatment of CD is based on the phase 3, randomized, double-blind, placebo-controlled VISIBLE 2 trial.

The trial enrolled 409 adult patients with moderately to severely active CD who had clinical response at week 6 following two doses of open-label IV vedolizumab at weeks 0 and 2. 

At week 6, they were randomly allocated in a 2:1 ratio to receive vedolizumab 108 mg administered by subcutaneous injection or placebo every 2 weeks. The primary endpoint was clinical remission at week 52, which was defined as a total Crohn’s Disease Activity Index score ≤ 150.

The results showed that significantly more patients receiving subcutaneous vedolizumab than placebo achieved long-term clinical remission (48% vs 34%; P < .01), the company said in a news release. 

The safety profile of subcutaneous vedolizumab is generally consistent with the known safety profile of IV vedolizumab, with the addition of injection-site reactions (including injection-site erythema, rash, pruritus, swelling, bruising, hematoma, pain, urticaria, and edema).

“Crohn’s disease is a complex and usually progressive disease for which an appropriate management plan is critical. My primary goal as a clinician is always to get patients to achieve remission,” Timothy Ritter, MD, senior medical director, GI Alliance Research, and assistant professor of medicine, Burnett School of Medicine at TCU, Fort Worth, Texas, said in the news release.

Ritter_Timothy_TX_web.jpg

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved the subcutaneous administration of vedolizumab (Entyvio) for maintenance therapy in adults with moderately to severely active Crohn’s disease (CD) after induction therapy with intravenous (IV) vedolizumab. 

The move follows the FDA’s approval last year of subcutaneous vedolizumab for maintenance treatment of adults with moderately to severely active ulcerative colitis (UC). 

The humanized immunoglobulin G1 monoclonal antibody is available as a single-dose prefilled pen (Entyvio Pen).

The FDA first approved the IV formulation of the biologic in 2014 for patients with moderate to severe UC and CD who cannot tolerate other therapies or in whom such therapies have failed. 

The approval of subcutaneous vedolizumab for maintenance treatment of CD is based on the phase 3, randomized, double-blind, placebo-controlled VISIBLE 2 trial.

The trial enrolled 409 adult patients with moderately to severely active CD who had clinical response at week 6 following two doses of open-label IV vedolizumab at weeks 0 and 2. 

At week 6, they were randomly allocated in a 2:1 ratio to receive vedolizumab 108 mg administered by subcutaneous injection or placebo every 2 weeks. The primary endpoint was clinical remission at week 52, which was defined as a total Crohn’s Disease Activity Index score ≤ 150.

The results showed that significantly more patients receiving subcutaneous vedolizumab than placebo achieved long-term clinical remission (48% vs 34%; P < .01), the company said in a news release. 

The safety profile of subcutaneous vedolizumab is generally consistent with the known safety profile of IV vedolizumab, with the addition of injection-site reactions (including injection-site erythema, rash, pruritus, swelling, bruising, hematoma, pain, urticaria, and edema).

“Crohn’s disease is a complex and usually progressive disease for which an appropriate management plan is critical. My primary goal as a clinician is always to get patients to achieve remission,” Timothy Ritter, MD, senior medical director, GI Alliance Research, and assistant professor of medicine, Burnett School of Medicine at TCU, Fort Worth, Texas, said in the news release.

Ritter_Timothy_TX_web.jpg

A version of this article appeared on Medscape.com.