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Blimp-1, an Intrinsic Factor that Represses HIV-1 Proviral Transcription in Memory CD4+ T Cells.
- Source :
-
Journal of Immunology . 4/1/2015, Vol. 194 Issue 7, p3267-3274. 8p. - Publication Year :
- 2015
-
Abstract
- 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 with naive CD4+ T cells and represses basal and Tat-mediated HIV-1 transcription. Blimp-1 binds an IFN-stimulated response element 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00221767
- Volume :
- 194
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Immunology
- Publication Type :
- Academic Journal
- Accession number :
- 103538183
- Full Text :
- https://doi.org/10.4049/jimmunol.1402581