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  • TLR7 agonist, N6-LS and PGT...
    Hsu, Denise C; Schuetz, Alexandra; Imerbsin, Rawiwan; Silsorn, Decha; Pegu, Amarendra; Inthawong, Dutsadee; Sopanaporn, Jumpol; Visudhiphan, Pornsuk; Chuenarom, Weerawan; Keawboon, Boot; Shi, Wei; Robb, Merlin L; Mascola, John R; Geleziunas, Romas; Koup, Richard A; Barouch, Dan H; Michael, Nelson L; Vasan, Sandhya

    PLOS pathogens, 02/2021, Letnik: 17, Številka: 2
    Journal Article

    Toll-like receptor 7 (TLR7) agonist and PGT121 (broadly neutralizing antibody, bnAb) administration previously delayed viral rebound and induced SHIV remission. We evaluated the impact of GS-986 (TLR7 agonist) and dual bnAbs on viral rebound after antiretroviral therapy (ART) interruption. Rhesus macaques inoculated with SHIV-1157ipd3N4 were initiated on daily suppressive ART from Day 14 post SHIV inoculation. Active arm animals (n = 8) received GS-986, N6-LS and PGT121 after plasma viral suppression, starting from week 14. GS-986 induced immune activation and SHIV-specific T cell responses but not viral expression in all the active arm animals. After ART interruption, median time to viral rebound was 6 weeks in the active and 3 weeks in the control arm (p = 0.024). In this animal model, the administration of the combination of GS-986 and dual bnAbs was associated with a modest delay in viral rebound. This strategy should be further evaluated to better understand the underlying mechanisms for the induction of virus-specific immune responses and delay in viral rebound.