NIH-funded research R01 grant

How gut bacteria affect cancer drug metabolism

Official title: Metabolism of cancer chemotherapeutics by the human gut microbiome

Funded at University of California, San Francisco · NIH-11061621 · Data updated 2026-11-12

This study is looking at how the bacteria in your gut might affect how well certain cancer treatments work and their side effects, specifically focusing on the drugs 5-fluorouracil and capecitabine, to help make cancer care more personalized and effective for patients like you.

More Gut Microbiome research and trials

Quick facts

Grant typeR01 grant
Study typeNIH-funded research
Funding institutionUniversity of California, San Francisco
NIH-funded
Lab location1 site (San Francisco, United States)
Project startSeptember 1, 2023
Project endAugust 31, 2028
Funding year2024
Award (this year)$130,605
NIH project number3R01CA255116-02S2
Project IDNIH-11061621 on NIH RePORTER

Who could benefit from this research

Could help

Ideal candidates for this research are cancer patients undergoing treatment with 5-fluorouracil or capecitabine.

Less likely to help

Patients not receiving treatment with 5-fluorouracil or capecitabine may not benefit from this research.

What this research studies

This research investigates how the human gut microbiome influences the effectiveness and side effects of cancer treatments, specifically focusing on the drug 5-fluorouracil (5-FU) and its prodrug capecitabine. By conducting laboratory and mouse studies, the researchers aim to identify the specific gut bacteria and their genetic components that metabolize these drugs. Understanding these interactions could help tailor cancer treatments to individual patients based on their gut microbiome composition. The ultimate goal is to improve the efficacy and reduce the toxicity of cancer therapies for patients.

Why it matters

Potential benefit: If successful, this research could lead to more personalized and effective cancer treatments with fewer side effects.

How similar studies have gone: Previous research has indicated that the gut microbiome plays a significant role in drug metabolism, suggesting that this approach could yield valuable insights.

Where this research is happening

  • University of California, San Francisco
    San Francisco, United States
    Active

Researchers

  • Principal investigator: Turnbaugh, Peter James — University of California, San Francisco
  • Study coordinator: Turnbaugh, Peter James

Related research

Other NIH-funded projects on the same topics.

  • 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

  • How gut bacteria affect how cancer drugs work

    This project looks at how the bacteria in your gut might change how well and with what side effects fluoropyrimidine cancer drugs like 5-FU work in people.

    NIH research University of California, San Francisco · San Francisco, United States · NIH-11473234

  • Gut bacteria and cancer drugs: how your gut may change chemotherapy effectiveness

    This project studies how the gut microbiome might affect how well certain chemotherapy drugs work and their side effects in people with cancer.

    NIH research University of California, San Francisco · San Francisco, United States · NIH-11473233

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.