Biosensors in the Oral Cavity (R21) | Apply Online

Opportunity Summary:

The Biosensors in the Oral Cavity (R21) funding opportunity (RFA-DE-17-005) is a National Institutes of Health (NIH) discretionary grant program under the U.S. Department of Health and Human Services, aimed at early-stage, high-impact pilot and feasibility projects. Its central goal is to push forward interdisciplinary research that either creates entirely new biosensors or adapts existing sensor technologies so they can function in the oral cavity as a practical, noninvasive site for dynamic and real-time monitoring of what is happening inside the human body. In other words, the program is designed to help researchers prove concepts and generate the preliminary data needed to turn mouth-based sensing into a reliable tool for tracking physiology and disease as it changes over time, rather than relying on occasional clinic visits or invasive sampling.

A key emphasis of the FOA is that these biosensors should use signals available in and around the mouth to assess health and disease states. The opportunity explicitly highlights multiple possible sources of biologically meaningful signals, including oral fluids (such as saliva and other oral secretions), oral and dental tissues, cells and microorganisms residing in the mouth, and various compounds that are present in the oral environment or that pass through it. That scope matters because it frames the oral cavity not just as a place to collect saliva, but as a complex ecosystem and access point where host biology, microbial activity, tissue health, and systemic exposures can potentially be monitored. Projects responsive to this FOA would typically focus on how to capture, detect, and interpret these signals in a way that supports clinically relevant conclusions about physiological processes or disease status.

The program also encourages forward-looking capabilities that would make oral biosensors useful outside traditional laboratory settings. It points to features like wireless or remote communication of sensor outputs, onboard or local processing of measurements, and the ability to transmit data to a centralized data collection center for analysis or clinical monitoring. This reflects an interest in real-world deployment: devices that can operate continuously or repeatedly in a person’s daily life, producing data streams that can be stored, interpreted, and acted upon. Another notable concept included in the FOA is potential integration with drug delivery devices, where a biosensor could communicate with a therapeutic system to dispense drugs dynamically based on immediate physiological needs. That idea aligns with closed-loop or “sense-and-respond” approaches, where detection and intervention are linked in near real time.

As an R21 mechanism, the opportunity is structured for exploratory, developmental work rather than large, late-stage clinical trials or full product-scale engineering programs. It is positioned to fund projects that test feasibility, demonstrate prototypes, validate sensing approaches in relevant oral matrices, and address early technical barriers such as sensitivity, specificity, stability in the oral environment, biocompatibility, signal interpretation, and practical deployment constraints. The award ceiling listed for the opportunity is $200,000, reinforcing that the intent is to support foundational proof-of-concept studies that can lead to larger follow-on efforts if the initial results are strong.

Eligibility is broad and includes many organization types: state, county, and local governments; public and state-controlled institutions of higher education; private institutions of higher education; federally recognized Native American tribal governments and other tribal organizations; special district governments; independent school districts; public housing authorities/Indian housing authorities; nonprofits with and without 501(c)(3) status; for-profit organizations other than small businesses; small businesses; and other entities as described in the additional eligibility text. The activity category is health, and the CFDA numbers associated with the opportunity are 93.121 (and an additional number listed in the source data). The agency listed is HHS-NIH, and the original and current closing date for this specific posting was October 19, 2016, with the FOA created and posted on June 8, 2016.

Taken together, this FOA is essentially a targeted push to develop mouth-based biosensing as a platform for noninvasive, real-time monitoring, with an eye toward technologies that can function continuously or repeatedly, communicate data remotely, and potentially feed into responsive therapeutic systems. It is geared toward teams that can combine expertise across areas like sensor engineering, materials science, oral biology and dentistry, microbiology, analytical chemistry, data science, and clinical translation, using the oral cavity as the central access point for capturing meaningful physiological information.

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