Molecular Mechanisms of Development and Reversal of Alcohol Induced Liver Fibrosis (R21) | Apply Online

Opportunity Summary:

The grant opportunity titled Molecular Mechanisms of Development and Reversal of Alcohol Induced Liver Fibrosis (R21) is a National Institutes of Health (NIH) funding announcement from the National Institute on Alcohol Abuse and Alcoholism (NIAAA). It supports exploratory, early-stage research aimed at explaining how alcohol use drives liver fibrosis at the molecular level, and how that fibrosis might be prevented or reversed. The central scientific focus is on the biological chain of events that leads to scarring in the liver, especially the processes that increase deposition of extracellular matrix (ECM) proteins like collagen. A major emphasis is placed on hepatic stellate cells (HSCs), since their activation is widely viewed as a key trigger of fibrogenesis. Projects responsive to this announcement are expected to dig into the mechanistic details behind HSC activation and collagen/ECM buildup in the context of alcohol exposure, with the longer-term goal of informing better prevention and treatment strategies for alcohol-related liver disease.

A distinctive feature of this FOA is that it does not only encourage mechanistic studies in a narrow sense; it also explicitly invites applicants to test small molecules that could reverse established alcohol-induced liver fibrosis or prevent it from developing in the first place. In practical terms, this creates room for projects that connect pathway-level discovery to early therapeutic exploration, such as identifying molecular targets involved in stellate cell activation, ECM production, inflammatory signaling, oxidative stress responses, or other fibrosis-related pathways influenced by alcohol, and then probing whether candidate compounds can modulate those mechanisms in relevant experimental systems. While the announcement text is brief, the intent is clearly translational in the sense that mechanistic insight should ideally point toward actionable interventions, even if only at a proof-of-concept stage.

The mechanism of support is the NIH R21 Research Project Grant, which is typically used for exploratory or developmental research that can be higher-risk or earlier in maturity than a standard R01. The FOA runs in parallel with a scientifically identical companion announcement under the R01 mechanism (PA 07 360), meaning applicants should choose between an R21 or R01 approach depending on the maturity of their preliminary data, the scope of work, and the level of funding and duration they require. The R21 track is commonly chosen when the project is innovative and plausible but still needs initial validation, feasibility testing, or generation of critical preliminary results.

In terms of funding expectations, the announcement does not specify a fixed budget amount or a fixed number of awards. Instead, it notes that award size and duration can vary because proposed projects may differ substantially in approach and scope. The total amount of money awarded and the number of funded applications will depend on factors such as the number of submissions, their scientific quality, the requested costs, and the expected project period. There is no cost sharing or matching requirement, which is typical for NIH research grants and lowers administrative barriers for applicants.

Eligibility is broad and includes a wide range of organization types: public and state-controlled institutions of higher education, private institutions of higher education, nonprofit organizations (including both 501(c)(3) nonprofits and those without 501(c)(3) status), state governments, small businesses, and for-profit organizations other than small businesses. Foreign institutions are also eligible to apply, which expands participation beyond the United States. The opportunity is categorized as discretionary funding, uses the grant funding instrument, and falls under the health activity category. The CFDA listing associated with it is 93.273 (Alcohol Research Programs).

Key administrative details include the Funding Opportunity Number PA 07 361, an original posted date of April 19, 2007, and an archive date of April 16, 2010. The announcement uses multiple receipt dates rather than a single deadline, so applicants would be expected to consult the full FOA for the exact submission cycles and related requirements. The full announcement is hosted on the NIH grants website at http://grants.nih.gov/grants/guide/pa-files/PA-07-361.html, and NIH’s Office of Extramural Research provides technical support contacts for access or linking issues.

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