Extracellular Vesicles and Substance Abuse (R01) | Apply Online

Opportunity Summary:

The government grant opportunity titled "Extracellular Vesicles and Substance Abuse (R01)" (Funding Opportunity Number PAR-15-283) is a discretionary NIH grant program led by the National Institute on Drug Abuse (NIDA) under the broader NIH umbrella. It was designed to support investigator-initiated research projects using the NIH R01 mechanism, which generally funds well-developed, hypothesis-driven studies that can produce significant advances in a field. The central aim of this funding opportunity is to stimulate research on how extracellular vesicles (EVs) relate to substance use and addiction, with a particular focus on whether EVs can help explain, measure, or even modify the biological processes that underlie addictive behaviors.

A key theme of the announcement is the "interplay" between extracellular vesicles and addictive processes. Extracellular vesicles are small membrane-bound particles released by cells that can carry proteins, lipids, and different types of RNA and other molecular cargo. Because EVs can move between cells and potentially influence how recipient cells behave, the FOA highlights them as a promising way to study cell-to-cell communication in the brain and body during substance exposure, withdrawal, and the longer-term course of addiction. In practical terms, NIDA is signaling interest in projects that connect EV biology to neuroplasticity, meaning the lasting changes in neural circuits that occur with repeated drug exposure and that contribute to craving, relapse risk, tolerance, and other core addiction-related phenomena. Research responsive to this aim could include studies examining how drugs of abuse alter EV release, EV cargo, EV uptake by neurons or glial cells, and how those EV-mediated signals might drive or reflect changes in synapses, inflammation, stress systems, or reward circuitry.

The opportunity also emphasizes potential clinical and translational value. NIDA specifically points to EVs as potential biomarkers or therapeutics in the substance abuse space. From a biomarker perspective, EVs are attractive because they can be isolated from accessible biofluids such as blood, saliva, urine, or cerebrospinal fluid, and their cargo can provide a molecular snapshot of processes occurring in tissues that may be difficult to sample directly, including the brain. This opens the door to studies that evaluate whether EV-associated molecules can help detect substance exposure, predict disease progression, identify risk for relapse, track treatment response, or distinguish subtypes of substance use disorders. From a therapeutic perspective, EVs are increasingly explored as delivery vehicles or as biologically active agents themselves, which aligns with the FOA's interest in whether EVs could be harnessed to modify addiction-relevant pathways, reduce neuroinflammation, promote recovery of neural function, or otherwise serve as novel intervention tools.

Administratively, this is a grant (FundingInstrumentType: Grant) in the Education/Health activity category, associated with CFDA number 93.279 (Drug Abuse and Addiction Research Programs). The award ceiling listed is $350,000, and the funding opportunity explicitly states that cost sharing or matching is not required, which reduces barriers for applicants who may not have institutional resources to provide matching funds. The announcement was posted on June 19, 2015, with an original and current closing date of November 3, 2016, and it was archived on December 4, 2016. That timing means the specific FOA is no longer active, but the summary still captures NIDA's research priorities at the time and can be useful as a guide to the kinds of EV-addiction research NIH has viewed as important.

Eligibility is broad and includes a wide range of public, private, nonprofit, and for-profit entities. Eligible applicants include federally recognized Native American tribal governments and tribal organizations, state governments, county and city or township governments, special district governments, independent school districts, and public housing authorities/Indian housing authorities. Academic institutions are eligible, including public and state-controlled institutions of higher education and private institutions of higher education. Nonprofits with or without 501(c)(3) status may apply, and for-profit organizations (other than small businesses) are also listed as eligible, alongside small businesses. The FOA further clarifies additional eligible groups, such as Alaska Native and Native Hawaiian Serving Institutions, AANAPISIs, Hispanic-serving institutions, Historically Black Colleges and Universities (HBCUs), Tribally Controlled Colleges and Universities (TCCUs), faith-based or community-based organizations, eligible federal agencies, U.S. territories or possessions, regional organizations, and even non-U.S. entities (foreign organizations). This wide eligibility range suggests NIDA wanted to encourage participation from many sectors, including institutions serving underrepresented communities and international organizations capable of contributing strong EV and addiction science.

In short, PAR-15-283 was intended to grow and accelerate a research area at the intersection of extracellular vesicle biology and substance use disorders. It sought projects that use EVs to clarify mechanisms of addiction-related neuroplasticity, develop EV-based biomarkers for exposure or clinical outcomes, and explore EV-centered therapeutic strategies. The sponsoring agency is NIH, and the full archived announcement was available through the NIH grants guide at http://grants.nih.gov/grants/guide/pa-files/PAR-15-283.html, with NIH Office of Extramural Research (OER) webmaster contacts provided for access or linking issues.

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