Enhancing Mechanistic Research on Precision Probiotic Therapies (R33 Clinical Trial Optional)

Updated Oct 20, 2026

Grant from the National Institutes of Health, open to small businesses. Closes Jun 2, 2027, 225 days left.

Opportunity number	PAR-25-210
Agency	National Institutes of Health
Funding type	Grant
Field	Education, Health
Cost sharing or matching	Not required
Assistance listing	93.121, 93.213, 93.313, 93.393, 93.866
Posted	Oct 31, 2024
Closes	Jun 2, 2027 (225 days left)
Add the deadline to	Google Calendar

Who can apply

State governments
County governments
City or township governments
Special district governments
Independent school districts
Public and state controlled institutions of higher education
Native American tribal governments (federally recognized)
Public housing authorities and Indian housing authorities
Native American tribal organizations (other than federally recognized tribal governments)
Nonprofits with 501(c)(3) status, other than institutions of higher education
Nonprofits without 501(c)(3) status, other than institutions of higher education
Private institutions of higher education
For-profit organizations other than small businesses
Small businesses
Others (see the eligibility notes)

Other Eligible Applicants include the following: Alaska Native and Native Hawaiian Serving Institutions; Asian American Native American Pacific Islander Serving Institutions (AANAPISISs); Eligible Agencies of the Federal Government; Faith-based or Community-based Organizations; Hispanic-serving Institutions; Historically Black Colleges and Universities (HBCUs); Indian/Native American Tribal Governments (Other than Federally Recognized); Non-domestic (non-U.S.) Entities (Foreign Organizations); Regional Organizations; Tribally Controlled Colleges and Universities (TCCUs) ; U.S. Territory or Possession; Non-domestic (non-U.S.) Entities (Foreign Organizations) are not eligible to apply. Non-domestic (non-U.S.) components of U.S. Organizations are not eligible to apply. Foreign components, as defined in the NIH Grants Policy Statement, are allowed.

Description

The purpose of this notice of funding opportunity (NOFO) is to support highly innovative mechanistic research to accelerate precision probiotic interventions. Specifically, this NOFO solicits R33 applications that will characterize person-specific features affecting probiotic responses to identify subgroups of probiotic responders and to enhance probiotic clinical outcomes. The ultimate goal of this NOFO is to identify, understand, and develop strategies to address barriers in precision probiotic therapies to account for the heterogenicity in humans that causes inconsistent probiotic responses.

This NOFO will support studies to assess the ability of the unique patterns of host biology (e.g., native microbiome, immune system, gender, diet, age, genetic background, lifestyle, and health history) that are correlated with probiotic usage to detect the improvement of probiotic responsiveness. Well-suited applications must offer rigorously designed mechanistic studies using relevant/innovative animal models or in human subjects.

This NOFO is intended to support projects where potential host biological patterns that are correlated with probiotic usage have been identified, as demonstrated with supportive preliminary data, but require further mechanistic studies to test for their causality or predictability. Applicants pursuing early-stage research to identify host biological patterns that may affect probiotic health outcomes should consider the companion (R61/R33) NOFO PAR-AT-24-XXX (TEMP-25412).

Full announcement and how to apply on Grants.gov

Education grants right now

There are 109 open federal grants in education that small businesses may apply for; 7 close within 30 days. The median award ceiling is $424,500. The agencies offering the most are National Institutes of Health and DOC NOAA - ERA Production. Grants in this field stay open a median of 1064 days; this one is open for 944 days.

Who has won this program before

Fred Hutchinson Cancer Center $443.7 million · from Jun 29, 2006
University Of Washington $83.6 million · from Mar 1, 1997
Regents Of The University Of California, SAN Francisco, The $82.5 million · from Mar 1, 1997
President And Fellows Of Harvard College $76.7 million · from Jul 1, 2004
University Of Alabama AT Birmingham $69.9 million · from Mar 30, 1988

The largest grants and cooperative agreements under assistance listing 93.121, 93.213, 93.313, 93.393, 93.866 with payments since Oct 1, 2025, from USAspending.gov. Amounts are each award's total.