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Learn MoreHIV-Associated Neurocognitive Disorders (HAND) affect over half of HIV-infected individuals, despite antiretroviral therapy (ART). Therapeutically targetable mechanisms underlying HAND remain elusive, partly due to a lack of a proper model. We developed a human-induced pluripotent stem cell (HiPSC) based model, independently differentiating HiPSCs into neurons, astrocytes, and microglia, and systematically combining to generate a tri-culture with or without HIV-infection and ART. Single cell RNAseq analysis on tri-cultures with HIV-infected microglia revealed inflammatory signatures in the microglia and EIF2 signaling in all three cell types. Treatment with the antiretroviral compound EFZ mostly resolved these signatures. However, EFZ increased RhoGDI and CD40 signaling in the HIV-infected microglia. This activation was associated with a persistent increase in TNFa production by microglia. This work establishes a tri-culture that recapitulates key features of HIV infection in the CNS and provides a new model to examine the effects of infection, its treatment, and other co-morbid conditions. SOURCE: James Garifallou (garifalloj@email.chop.edu) - Center for Applied Genomics Children's Hospital of Philadelphia
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