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JOURNAL ARTICLE

Small Molecule Inhibitors of BAF; A Promising Family of Compounds in HIV-1 Latency Reversal

Mateusz Stoszko, Elisa De Crignis, Casper Rokx, Mir Mubashir Khalid, Cynthia Lungu, Robert-Jan Palstra, Tsung Wai Kan, Charles Boucher, Annelies Verbon, Emily C Dykhuizen, Tokameh Mahmoudi
EBioMedicine 2016, 3: 108-21
26870822
Persistence of latently infected cells in presence of Anti-Retroviral Therapy presents the main obstacle to HIV-1 eradication. Much effort is thus placed on identification of compounds capable of HIV-1 latency reversal in order to render infected cells susceptible to viral cytopathic effects and immune clearance. We identified the BAF chromatin remodeling complex as a key player required for maintenance of HIV-1 latency, highlighting its potential as a molecular target for inhibition in latency reversal. Here, we screened a recently identified panel of small molecule inhibitors of BAF (BAFi's) for potential to activate latent HIV-1. Latency reversal was strongly induced by BAFi's Caffeic Acid Phenethyl Ester and Pyrimethamine, two molecules previously characterized for clinical application. BAFi's reversed HIV-1 latency in cell line based latency models, in two ex vivo infected primary cell models of latency, as well as in HIV-1 infected patient's CD4 + T cells, without inducing T cell proliferation or activation. BAFi-induced HIV-1 latency reversal was synergistically enhanced upon PKC pathway activation and HDAC-inhibition. Therefore BAFi's constitute a promising family of molecules for inclusion in therapeutic combinatorial HIV-1 latency reversal.

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