# Preclinical Proof of Concept Studies for Rare Diseases (R21 Clinical Trial Not Allowed)

> Federal funding opportunity · **POSTED** · National Institutes of Health · close: **06/02/2026**

## Key facts

- **Opportunity ID:** 357570
- **Opportunity number:** RFA-TR-25-002
- **Agency:** National Institutes of Health
- **Status:** posted
- **Document type:** synopsis
- **Open date:** 12/06/2024
- **Close date:** 06/02/2026
- **CFDA codes:** 93.350

## Primary source

Grants.gov opportunity detail: https://www.grants.gov/search-results-detail/357570

## Citation

> US Grants.gov, funding opportunity 357570 (RFA-TR-25-002). Retrieved via AI Analytics 2026-05-17 from https://api.ai-analytics.org/opportunity/357570. Licensed CC0.

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*[Grants.gov dataset](/datasets/grants-gov) · CC0 1.0*