@article{10.1172/jci.insight.93230, author = {Delphine Planas AND Yuwei Zhang AND Patricia Monteiro AND Jean-Philippe Goulet AND Annie Gosselin AND Nathalie Grandvaux AND Thomas J. Hope AND Ariberto Fassati AND Jean-Pierre Routy AND Petronela Ancuta}, journal = {JCI Insight}, publisher = {The American Society for Clinical Investigation}, title = {HIV-1 selectively targets gut-homing CCR6+CD4+ T cells via mTOR-dependent mechanisms}, year = {2017}, month = {8}, volume = {2}, url = {https://insight.jci.org/articles/view/93230}, abstract = {Gut-associated lymphoid tissues are enriched in CCR6+ Th17-polarized CD4+ T cells that contribute to HIV-1 persistence during antiretroviral therapy (ART). This raises the need for Th17-targeted immunotherapies. In an effort to identify mechanisms governing HIV-1 permissiveness/persistence in gut-homing Th17 cells, we analyzed the transcriptome of CCR6+ versus CCR6– T cells exposed to the gut-homing inducer retinoic acid (RA) and performed functional validations in colon biopsies of HIV-infected individuals receiving ART (HIV+ART). Although both CCR6+ and CCR6– T cells acquired gut-homing markers upon RA exposure, the modulation of unique sets of genes coincided with preferential HIV-1 replication in RA-treated CCR6+ T cells. This molecular signature included the upregulation of HIV-dependency factors acting at entry/postentry levels, such as the CCR5 and PI3K/Akt/mTORC1 signaling pathways. Of note, mTOR expression/phosphorylation was distinctively induced by RA in CCR6+ T cells. Consistently, mTOR inhibitors counteracted the effect of RA on HIV replication in vitro and viral reactivation in CD4+ T cells from HIV+ART individuals via postentry mechanisms independent of CCR5. Finally, CCR6+ versus CCR6– T cells infiltrating the colons of HIV+ART individuals expressed unique molecular signatures, including higher levels of CCR5, integrin β7, and mTOR phosphorylation. Together, our results identify mTOR as a druggable key regulator of HIV permissiveness in gut-homing CCR6+ T cells.}, number = {15}, doi = {10.1172/jci.insight.93230}, url = {https://doi.org/10.1172/jci.insight.93230}, }