Extracellular Vesicles and Substance Abuse (R21) | Apply Online

Opportunity Summary:

The Extracellular Vesicles and Substance Abuse (R21) funding opportunity (PAR-15-284) is a National Institutes of Health (NIH) grant announcement, led by the National Institute on Drug Abuse (NIDA), focused on early-stage, exploratory research that connects extracellular vesicles (EVs) to substance use and addiction. The central aim is to push forward projects that examine how EVs may participate in addictive processes and, more importantly, how they might be used to better understand the brain changes that come with substance exposure. The announcement places special emphasis on neuroplasticity, meaning the long-term cellular and circuit-level adaptations in the nervous system that help explain compulsive drug seeking, relapse vulnerability, and other hallmark features of addiction.

A major theme of the opportunity is the practical and scientific utility of EVs in addiction research. EVs are small membrane-bound particles released by cells that can carry proteins, lipids, and various nucleic acids, and they are increasingly studied as a way cells communicate with each other locally and across longer distances. In the context of substance abuse, the FOA highlights three broad areas of interest: first, using EVs to clarify mechanisms underlying drug-related neuroplasticity; second, developing or validating EV-based biomarkers (for example, signals measurable in blood or other biofluids that track exposure, disease state, risk, progression, or recovery); and third, exploring EVs as therapeutic tools or therapeutic targets. In plain terms, NIDA is signaling that EVs might help explain how drugs change the brain, might provide measurable indicators of those changes, and might eventually be engineered or manipulated to prevent or treat addiction-related damage.

The mechanism for this announcement is the NIH R21, which is designed for exploratory or developmental projects rather than large, multi-year definitive trials. The listed award ceiling is $200,000, reflecting the smaller, proof-of-concept nature of R21 grants and the expectation that awardees will generate preliminary evidence, new methods, or compelling early data that could justify a future, more extensive grant application. There is no cost sharing or matching requirement, which means applicants are not expected to contribute non-federal funds as a condition of the award.

From an administrative standpoint, this is a discretionary grant within a health-related activity category, and it is associated with CFDA number 93.279 (Drug Abuse and Addiction Research Programs). The opportunity was posted and created on June 19, 2015, with an original and final closing date of November 3, 2016, and an archive date of December 4, 2016. While those dates indicate the specific FOA is no longer open, the summary still matters because it reflects a defined research priority area and a model for how NIH/NIDA frames EV-focused addiction science, which often reappears in later or related announcements.

Eligibility is broad and includes many types of U.S. and non-U.S. organizations. Eligible applicants listed include state, county, city or township governments, special district governments, and independent school districts, along with public and state-controlled institutions of higher education, private institutions of higher education, and a wide range of nonprofits (both 501(c)(3) and non-501(c)(3)) as well as for-profit organizations (including small businesses and other for-profit entities). The FOA also explicitly includes tribal governments (federally recognized and other than federally recognized), public housing authorities/Indian housing authorities, U.S. territories or possessions, and regional organizations. Additional eligible categories call out institutions and groups such as Historically Black Colleges and Universities (HBCUs), Hispanic-serving institutions, Tribally Controlled Colleges and Universities (TCCUs), Alaska Native and Native Hawaiian Serving Institutions, and Asian American Native American Pacific Islander Serving Institutions (AANAPISIs). It also indicates that non-domestic entities (foreign organizations) and eligible federal agencies can apply, and it includes faith-based or community-based organizations, underscoring NIDA and NIH interest in drawing from a wide research and community ecosystem.

For applicants trying to interpret what a competitive project might look like under this FOA, the key is that it is not simply a general addiction research call. It is specifically looking for studies where EV biology is central to the hypothesis and approach, and where the outcomes speak directly to addiction-relevant mechanisms, measurement, or intervention potential. That could involve studying how drug exposure alters EV release, cargo, or targeting between neurons and glia; whether EV-contained RNA or protein signatures correlate with stages of use, withdrawal, or relapse risk; or whether EVs can be leveraged for delivery of therapeutic molecules or used as readouts of treatment response. The announcement language points toward interdisciplinary work that bridges addiction neuroscience, molecular and cellular biology, biomarker science, and translational strategies.

The agency listed is NIH, and the primary scientific interest is NIDA. The full announcement was hosted through the NIH grants guide at http://grants.nih.gov/grants/guide/pa-files/PAR-15-284.html. For access or technical linking problems, the contact provided is the NIH Office of Extramural Research (OER) webmaster (FBOWebmaster@OD.NIH.GOV), indicating support for applicants who encounter issues retrieving the official text.

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