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https://observatorio.fm.usp.br/handle/OPI/12033
Title: | Increased frequency of circulating Tc22/Th22 cells and polyfunctional CD38(-) T cells in HIV-exposed uninfected subjects |
Authors: | OLIVEIRA, Luanda M. S.; LIMA, Josenilson F.; CERVANTES, Cesar A. C.; CASSEB, Jorge S.; MENDONCA, Marcelo; DUARTE, Alberto J. S.; SATO, Maria N. |
Citation: | SCIENTIFIC REPORTS, v.5, article ID 13883, 9p, 2015 |
Abstract: | Some individuals are resistant to HIV-1 infection despite repeated exposure to the virus, suggesting the presence of a complex antiviral response. Innate factors like IL-22 exert gut mucosal protection and polyfunctional T cells have been associated with low progression in HIV infection; therefore, we evaluated the frequencies of CD4+ and CD8+ T cell-secreting cytokines, including Tc22/Th22 cells and polyfunctional T cells in HIV-1-exposed uninfected individuals (EUs), their HIV-1-infected partners and healthy controls. EUs exhibited an increased frequency of p15 Gag CD4+ IL-22+ secreting T cells, whereas HIV-infected partners demonstrated a high frequency of CD4+ IL-17+ T cells in response to p24. Similar responses of Th22 and Tc22 cells to Gag peptides and Staphylococcal enterotoxin B (SEB) stimulation were detected in the serodiscordant couples. However, polyfunctionality in HIV subjects was associated with an HIV Gag response of CD38+ T cells, whereas polyfunctionality for EUs was induced upon SEB stimulation by CD38-T cells. EUs demonstrated the presence of Tc22/Th22 cells and polyfunctional CD38-T cells with a low activation profile. These data suggest that SEB-induced polyfunctional CD4+ and CD8+ T cells together with Tc22/Th22 cells in EU individuals can provide an immunological advantage in the response to pathogens such as HIV-1. |
Appears in Collections: | Artigos e Materiais de Revistas Científicas - FM/MDT Artigos e Materiais de Revistas Científicas - FM/MPT Artigos e Materiais de Revistas Científicas - HC/ICHC Artigos e Materiais de Revistas Científicas - IMT Artigos e Materiais de Revistas Científicas - LIM/56 Artigos e Materiais de Revistas Científicas - ODS/03 |
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