The National Institutes of Health (NIH), through the National Institute on Drug Abuse (NIDA), has announced a funding opportunity titled "Ex Vivo Models for Studies at the Intersection of HIV and Poly-Substance Use" (R01 Clinical Trial Not Allowed). This grant aims to investigate the neuroimmune and neuronal-glial mechanisms of HIV-associated neurological disorders (HAND) using innovative ex vivo culturing platforms derived from human induced pluripotent stem cells (hiPSC) in the context of poly-substance use. The initiative is crucial for understanding the interplay between HIV transmission and substance use, with a focus on enhancing treatment approaches and patient outcomes. NIDA plans to commit $2 million annually for 8 to 10 awards over three fiscal years, with applications due by 5:00 PM local time on August 13, 2025. For further inquiries, applicants can contact NIH Grants Information at grantsinfo@nih.gov.