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• W2517028612 abstract "HIV type 2 (HIV-2) represents an attenuated form of HIV, in which many infected individuals remain 'aviremic' without antiretroviral therapy. However, aviremic HIV-2 disease progression exists, and in the current study, we therefore aimed to examine if specific pathological characteristics of CD4 T cells are linked to such outcome.HIV-seronegative (n = 25), HIV type 1 (HIV-1) (n = 33), HIV-2 (n = 39, of whom 26 were aviremic), and HIV-1/2 dually (HIV-D) (n = 13)-infected study participants were enrolled from an occupational cohort in Guinea-Bissau.CD4 T-cell differentiation, activation, exhaustion, senescence, and transcription factors were assessed by polychromatic flow cytometry. Multidimensional clustering bioinformatic tools were used to identify CD4 T-cell subpopulations linked to infection type and disease stage.HIV-2-infected individuals had early and late-differentiated CD4 T-cell clusters with lower activation (CD38HLA-DR) and exhaustion programmed death-1 (PD-1) than HIV-1 and HIV-D-infected individuals. We also noted that aviremic HIV-2-infected individuals possessed fewer individuals. CD4 T cells with pathological signs compared to other HIV-infected groups. Still, compared to HIV-seronegative individuals, aviremic HIV-2-infected individuals had T-bet CD4 T cells that showed elevated immune activation/exhaustion, and particularly the frequencies of PD-1 cells were associated with a suboptimal percentage of CD4 T cells.Increased frequencies of CD4 T cells with an activated/exhausted phenotype correlate with exacerbated immunodeficiency in aviremic HIV-2-infected individuals. Thus, these findings encourage studies on the introduction of antiretroviral therapy also to individuals with aviremic HIV-2 infection." @default.
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• W2517028612 date "2016-10-23" @default.
• W2517028612 modified "2023-10-03" @default.
• W2517028612 title "CD4+ T cells with an activated and exhausted phenotype distinguish immunodeficiency during aviremic HIV-2 infection" @default.
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• W2517028612 doi "https://doi.org/10.1097/qad.0000000000001223" @default.
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