The Role of Microbial Metabolites in Cancer Prevention and Etiology (U01) | Apply Online

Opportunity Summary:

The NIH grant opportunity "The Role of Microbial Metabolites in Cancer Prevention and Etiology (U01)" (Funding Opportunity Number PAR 10-208) is a cooperative agreement program led by the National Cancer Institute (NCI) in partnership with the National Center for Complementary and Alternative Medicine (NCCAM; now known as NCCIH). Its central focus is the biology that sits at the intersection of diet, the gut microbiome, and cancer: specifically, how metabolites produced by gut microorganisms from dietary components influence host cells and, ultimately, cancer risk, prevention, and disparities.

The scientific purpose is to support projects that identify and characterize microbially generated metabolites that come from foods or dietary compounds and then determine how those metabolites act in the body at a molecular and cellular level. The FOA emphasizes mechanistic work on how these bacterial metabolites affect key host processes tied to carcinogenesis and cancer prevention, including cell proliferation and apoptosis (how cells grow and how they undergo programmed cell death), cytokine production (chemical signaling involved in immune responses), and broader inflammatory and immunomodulatory pathways. In practical terms, applicants are expected to go beyond cataloging which metabolites exist and instead explain what they do, what pathways they trigger or inhibit, and how those effects could plausibly increase cancer risk or contribute to prevention.

A major component of the announcement is an encouragement to include human intervention research where appropriate. The FOA highlights the importance of studying inter-individual variability in the production of bacterial metabolites, with explicit attention to differences across racial and ethnic groups. This emphasis ties directly to cancer health disparities: the program is interested in whether different populations produce different levels or profiles of microbial metabolites from the same dietary inputs, and whether those differences translate into different protective or harmful effects relevant to cancer. The long-term implication is to help determine who might benefit from specific dietary recommendations, who might not respond as well, and who could even be put at risk by certain dietary patterns depending on microbiome-mediated metabolism.

The program is also structured to push team science. Applications are required to use a multiple principal investigator model with investigators bringing distinct and complementary expertise. The FOA lists example areas that should be represented across the leadership team, such as microbiology, nutrition, cancer biology, analytical chemistry, and genetics. This requirement reflects the reality that the research spans several technical domains: microbiome studies and culturing or community profiling, metabolite identification and quantification (often requiring sophisticated analytical chemistry and metabolomics platforms), mechanistic testing in cell and animal systems, and human study design and interpretation, including population variation and disparities-related expertise.

From a project design standpoint, the FOA allows either clinical or preclinical approaches, which means applicants can propose human studies, animal models, cell-based mechanistic work, or integrated designs that connect these layers. What matters most is that the work directly addresses the core goal of linking microbial metabolism of diet-derived components to host biological responses relevant to cancer etiology and prevention, and that it is capable of producing actionable mechanistic insight rather than purely descriptive associations.

In terms of award mechanism and oversight, this FOA uses the NIH U01 cooperative agreement mechanism. A U01 is different from a standard research project grant in that NIH staff typically have a more active programmatic role, and the award is intended to function as a partnership between the investigators and the NIH. Consistent with that cooperative structure, the FOA requires investigators to attend annual meetings with NIH personnel, which are generally used to share progress, harmonize approaches across funded teams, and promote collaboration and cross-fertilization of methods and findings.

Eligibility is broad and includes many common applicant types: public and private institutions of higher education, state governments, for-profit organizations (including small businesses and other for-profits), and nonprofit organizations (including those with or without 501(c)(3) status, with certain distinctions). The FOA also notes additional eligible applicants such as eligible federal agencies, non-U.S. (foreign) entities, and regional organizations, indicating an openness to international participation where appropriate. There is no cost sharing or matching requirement listed.

Administratively, the opportunity is categorized as discretionary funding and sits within NIH activity areas that map to complementary and integrative health research and to cancer cause, prevention, and cancer biology research (CFDA numbers listed include 93.213, 93.393, and 93.396). Awards under the FOA are contingent on available funds and the receipt of a sufficient number of strong applications, which is standard NIH language signaling that funding levels and the number of awards depend on both budget and peer review outcomes. The original public posting date is May 27, 2010, and the FOA is now archived, but the content captures the program goals and expectations for applications submitted during its active period.

Overall, this FOA is aimed at building a clearer, mechanistic understanding of how gut microbes transform dietary components into metabolites that can change inflammation, immune signaling, and cell fate decisions in ways that matter for cancer. It is equally focused on translating that biology into prevention-relevant knowledge, including rigorously examining variability across individuals and populations so that dietary guidance and prevention strategies can be better targeted, more effective, and less likely to unintentionally widen health disparities.

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