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Dysfunction of virus-specific CD4 + T cells in chronic human infections is poorly understood. We performed genome-wide transcriptional analyses and functional assays of CD4 + T cells specific for human immunodeficiency virus (HIV) from HIV-infected people before and after initiation of antiretroviral therapy (ART). A follicular helper T cell (T FH cell)-like profile characterized HIV-specific CD4 + T cells in viremic infection. HIV-specific CD4 + T cells from people spontaneously controlling the virus (elite controllers) robustly expressed genes associated with the T H 1, T H 17 and T H 22 subsets of helper T cells. Viral suppression by ART resulted in a distinct transcriptional landscape, with a reduction in the expression of genes associated with T FH cells, but persistently low expression of genes associated with T H 1, T H 17 and T H 22 cells compared to the elite controller profile. Thus, altered differentiation is central to the impairment of HIV-specific CD4 + T cells and involves both gain of function and loss of function.

Altered differentiation is central to HIV-specific CD4+ T cell dysfunction in progressive disease