NIH-funded research NIH-funded research

Investigating how sex differences affect brain-gut interactions in irritable bowel syndrome.

Official title: Sex related differences in Brain Gut Microbiome Interactions in Irritable Bowel Syndrome

Funded at University of California Los Angeles · NIH-10903897 · Data updated 2026-11-12

This study is looking at how hormones, gut bacteria, and brain activity work together to affect symptoms in women with irritable bowel syndrome (IBS) and chronic constipation, hoping to find better treatments that fit each person's unique situation.

Quick facts

Grant typeNIH-funded research
Study typeNIH-funded research
Funding institutionUniversity of California Los Angeles
NIH-funded
Lab location1 site (Los Angeles, United States)
Project startMay 1, 2020
Project endApril 30, 2026
Funding year2024
Award (this year)$1,547,473
NIH project number5U54DK123755-05
Project IDNIH-10903897 on NIH RePORTER

Who could benefit from this research

Could help

Ideal candidates for this research are women diagnosed with irritable bowel syndrome or chronic constipation, particularly those experiencing symptoms related to hormonal fluctuations.

Less likely to help

Patients with IBS who are male or those whose symptoms are not influenced by hormonal changes may not benefit from this research.

What this research studies

This research explores the relationship between sex hormones, gut microbiome metabolites, and brain function in patients with irritable bowel syndrome (IBS) and chronic constipation. It aims to understand how these factors contribute to the symptoms experienced, particularly in women who may have heightened sensitivity during certain hormonal phases. By utilizing advanced brain imaging techniques, the study will identify how these interactions influence brain activity and connectivity related to gastrointestinal symptoms. The findings could lead to better-targeted treatments for IBS based on individual hormonal and microbiome profiles.

Why it matters

Potential benefit: If successful, this research could lead to personalized treatment strategies for IBS that consider hormonal and microbiome factors, improving patient outcomes.

How similar studies have gone: Previous research has shown promising results in understanding the brain-gut microbiome interactions, but this specific focus on sex differences is relatively novel.

Where this research is happening

  • University of California Los Angeles
    Los Angeles, United States
    Active

Researchers

  • Principal investigator: Mayer, Emeran a — University of California Los Angeles
  • Study coordinator: Mayer, Emeran a

Related research

Other NIH-funded projects on the same topics.

  • Understanding how alcohol and the gut’s serotonin system affect IBS

    This project looks at how alcohol and the gut’s serotonin system may influence irritable bowel syndrome (IBS) symptoms in people who have IBS.

    NIH research Cleveland Clinic Lerner Com-Cwru · Cleveland, United States · NIH-11314772

  • Sex differences in how the brain, gut, and microbes interact in IBS

    A large NIH grant is studying how sex differences in brain–gut–microbiome interactions relate to IBS and its related symptoms, with a focus on women.

    NIH research University of California Los Angeles · Los Angeles, United States · NIH-11303027

  • Multi-agent AI to annotate enzymes in the human gut microbiome

    A team at a major university will build an AI system that automatically curates and labels the functions of enzymes in the human gut microbiome to speed up understanding their health effects.

    NIH research University of South Florida · Tampa, United States · NIH-11594384

  • Mapping how gut bacteria transform drugs

    Scientists will study how the gut microbiome changes thousands of drugs into new forms, which could affect how well a medicine works or whether it causes side effects.

    NIH research Stanford University · Stanford, United States · NIH-11550022

  • Aflatoxin exposure and child growth in Guatemala

    A study in rural Guatemala will track how exposure to aflatoxin relates to growth and gut health in young children.

    NIH research Arizona State University-Tempe Campus · Scottsdale, United States · NIH-11513260

  • Gut bacteria that can make cancer immunotherapy less effective

    This project will see if reducing chronic inflammation driven by certain gut bacteria can help immunotherapy work better for people whose cancers have stopped responding.

    NIH research University of Tx Md Anderson Can Ctr · Houston, United States · NIH-11478145

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.