This Notice of Funding Opportunity (NOFO) encourages research on the biology of high-confidence risk factors associated with complex brain disorders, with a focus on the intracellular, transcellular, and circuit substrates of neural function.

For the purposes of this NOFO, the term complex can

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refer to a multifactorial contribution to risk (e.g., polygenic and/or environmental) and/or highly distributed functional features of the brain disorder.

Studies may be either hypothesis-generating (unbiased discovery) or hypothesis-testing in design and may utilize in vivo, in situ or in vitro experimental paradigms, e.g., model organisms or human cell-based assays.

While behavioral paradigms and outcome measures can be incorporated into the research design to facilitate the characterization of intracellular, transcellular, and circuit mechanisms, these are neither required nor expected.

Studies should not attempt to model disorders but instead should aim to elucidate the neurobiological impact of individual or combined risk factor(s), such as the affected molecular and cellular components and their relationships within defined biological process(es).

This can include the fundamental biology of these factors, components, and processes.

The resulting paradigms, component pathways, and biological processes should be disseminated with sufficient detail to enrich common and/or federated data resources (e.g., those contributing to the Gene Ontology, Synaptic Gene Ontology, FAIR Data Informatics) in order to bridge the gap between disease risk factors, biological mechanism and therapeutic target identification.

The present NOFO (R01 activity code) can be used for applications to further develop lines of inquiry where feasibility or proof-of-concept has been established.

Applicants proposing exploratory research at the early and conceptual stages of project development should apply to the companion R21 NOFO PAR-24-025