The National Institutes of Health (NIH) is offering a funding opportunity for research focused on the neuroimmune mechanisms linking HIV and addictive substance use, specifically targeting HIV-associated neurological disorders (HAND). This grant aims to support innovative projects utilizing advanced ex vivo models derived from human induced pluripotent stem cells (hiPSC) to investigate how addictive substances influence HAND and HIV pathology, with an emphasis on cellular interactions, neurodegeneration, and inflammatory responses in the brain. The total funding available for this initiative is $2 million, and eligible applicants include educational institutions, nonprofits, government agencies, and foreign organizations. Applications are due by July 13, 2025, and interested parties can reach out to NIH Grants Information at grantsinfo@nih.gov for further inquiries. More details can be found in the full announcement at https://grants.nih.gov/grants/guide/rfa-files/RFA-DA-25-074.html.