Journal
VIROLOGY
Volume 314, Issue 1, Pages 179-189Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0042-6822(03)00453-7
Keywords
HIV-1 subtypes; LTR; transcription; HMGB1; rel proteins
Categories
Ask authors/readers for more resources
We investigated whether the high mobility group B I (HMGB1), an abundant nuclear protein in all mammalian cells, affects HIV-1 transcription. Intracellular expression of human HMGB1 repressed HIV-1 gene expression in epithelial cells. This inhibitory effect of HMGB I was caused by repression of long terminal repeat (LTR)-mediated transcription. Other viral promoters/enhancers, including simian virus 40 or cytomegalovirus, were not inhibited by HMGB1. In addition, HMGB1 inhibition of HIV-1 subtype C expression was dependent on the number of NFkappaB sites in the LTR region. The inhibitory effect of HMGB I on viral gene expression observed in HeLa cells was confirmed by an upregulation of viral replication in the presence of antisense HMGB1 in monocytic cells. In contrast to what was found in HeLa cells and monocytic cells, endogenous HMGB I expression did not affect HIV-1 replication in unstimulated Jurkat cells. Thus, intracellular HMGB I affects HIV-1 LTR-directed transcription in a promoter- and cell-specific manner. (C) 2003 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available