The human immunodeficiency viruses (HIVs) types 1 and 2 have similar genetic organization but differ significantly in nucleic acid sequence. Although infection by either agent leads to symptoms of immunodeficiency, recent studies suggest potential differences in the time course and severity of these diseases. In this report, the transcriptional regulation and induction of these retroviruses were analyzed. We report that the regulation of HIV-2 differs from that of HIV-1: a distinct T-cell activation pathway, triggering of the CD3 component of the T-cell receptor complex, stimulates HIV-2 but not HIV-1 gene expression. The response to T-cell receptor stimulation in HIV-2 is mediated partly by an upstream regulatory element, termed CD3R, which is recognized by a sequence-specific DNA binding protein, NF-CD3R. Jurkat T leukemia cell lines containing HIV-2 provirus also showed increased viral replication after stimulation of the T-cell receptor complex, in contrast to HIV-1. These findings suggest that transcriptional regulation and induction of HIV-2 differ from HIV-1 and raise the possibility that different cofactors contribute to the activation of HIV-1 and HIV-2-associated AIDS.
|Original language||English (US)|
|Number of pages||5|
|Journal||Proceedings of the National Academy of Sciences of the United States of America|
|State||Published - Dec 1 1990|
- viral gene expression
ASJC Scopus subject areas