Benzotriazoles Reactivate Latent HIV-1 through Inactivation of STAT5 SUMOylation

Publication date: 31 January 2017
Source:Cell Reports, Volume 18, Issue 5
Author(s): Alberto Bosque, Kyle A. Nilson, Amanda B. Macedo, Adam M. Spivak, Nancie M. Archin, Ryan M. Van Wagoner, Laura J. Martins, Camille L. Novis, Matthew A. Szaniawski, Chris M. Ireland, David M. Margolis, David H. Price, Vicente Planelles
The presence of latent HIV-1 in infected individuals represents a major barrier preventing viral eradication. For that reason, reactivation of latent viruses in the presence of antiretroviral regimens has been proposed as a therapeutic strategy to achieve remission. We screened for small molecules and identified several benzotriazole derivatives with the ability to reactivate latent HIV-1. In the presence of IL-2, benzotriazoles reactivated and reduced the latent reservoir in primary cells, and, remarkably, viral reactivation was achieved without inducing cell proliferation, T cell activation, or cytokine release. Mechanistic studies showed that benzotriazoles block SUMOylation of phosphorylated STAT5, increasing STAT5's activity and occupancy of the HIV-1 LTR. Our results identify benzotriazoles as latency reversing agents and STAT5 signaling and SUMOylation as targets for HIV-1 eradication strategies. These compounds represent a different direction in the search for "shock and kill" therapies.

Graphical abstract

Teaser

Latent HIV-1 represents a barrier toward HIV-1 eradication. Bosque et al. identify a family of compounds that have the ability to reactivate and decrease latent HIV-1. These compounds block SUMOylation of STAT5 and represent a target for HIV-1 eradication strategies.


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