Blimp-1, an intrinsic factor that represses HIV-1 proviral transcription in memory CD4+ T cells.
Blimp-1, an intrinsic factor that represses HIV-1 proviral transcription in memory CD4+ T cells.
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DOI:
10.4049/jimmunol.1402581
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发表时间:
2015-04-01
期刊:
影响因子:
--
通讯作者:
Henderson AJ
中科院分区:
文献类型:
--
作者:
Kaczmarek Michaels K;Natarajan M;Euler Z;Alter G;Viglianti G;Henderson AJ
CD4+ T cell subsets differentially support HIV-1 replication. For example, quiescent CD4+ memory T cells are susceptible to HIV-1 infection but do not support robust HIV-1 transcription and have been implicated as the primary reservoir of latent HIV-1. T cell transcription factors that regulate maturation potentially limit HIV-1 transcription and mediate the establishment and maintenance of HIV-1 latency. We report that B lymphocyte-induced maturation protein-1 (Blimp-1), a critical regulator of B and T cell differentiation, is highly expressed in memory CD4+ T cells compared to naïve CD4+ T cells and represses basal and Tat-mediated HIV-1 transcription. Blimp-1 binds an interferon-stimulated response element (ISRE) within HIV-1 provirus and it is displaced following T cell activation. Reduction of Blimp-1 in infected primary T cells including CD4+ memory T cells increases RNA polymerase II processivity, histone acetylation and baseline HIV-1 transcription. Therefore, the transcriptional repressor, Blimp-1, is an intrinsic factor that predisposes CD4+ memory T cells to latent HIV-1 infection.
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