Fate of the human immunodeficiency virus type 1 provirus in infected cells: a role for vpr. (original) (raw)

J Virol. 1995 Sep; 69(9): 5883–5889.

Department of Microbiology and Immunology, UCLA School of Medicine 90094-1678, USA.

Abstract

We investigated the fate of human immunodeficiency virus type 1 (HIV-1) viral DNA in infected peripheral blood lymphocytes and immortalized T-cell lines by using a replication-defective HIV-1. We observed that integrated HIV-1 DNA and viral gene expression decrease over time. A frameshift mutation in vpr resulted in maintenance of the HIV-1 provirus and stable persistence of viral expression. Transfection of vpr together with the neomycin resistance gene in the absence of other viral genes decreased the formation of geneticin-resistant colonies, indicating either a cytotoxic or a cytostatic effect upon cells. Therefore, maintenance of HIV-1 infection within an infected proliferating population is due to two competing processes, the rate of viral spread and the degree of cell growth inhibition and/or death induced by Vpr.

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