Abstract |
p53 expression and activation have been associated to faster human immunodeficiency virus (HIV) disease progression, most probably by inducing CD4+ T cell death but also through its cooperative effect in the control of viral gene transcription by viral regulatory proteins. Here, we show that RNA interference of p53 in HIV-1 reporter (HeLa P4-R5 MAGI) and lymphoid (SupT1) cell lines blocked HIV-1 and Tat-induced transcription from the HIV-1 promoter and HIV-1 replication in acutely infected cells, suggesting a cooperative role of p53 in HIV-1 transcription. Contrary to SupT1 cells, which encode several mutations on the p53 DNA binding domain, death of HIV-1-induced syncytia was reduced in cocultures of HeLa P4-R5 MAGI with persistently infected HIV-1 cells. To our knowledge, this is the first demonstration of the effect of the loss of function of p53 in HIV-1 replication, which is independent on its classical DNA binding activity. Our results suggest two independent roles for p53 in HIV-1 infection: cooperation in HIV long-terminal repeat transcription and virus-induced cell death.
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Authors | Eduardo Pauls, Jordi Senserrich, Bonaventura Clotet, Jose A Esté |
Journal | Journal of leukocyte biology
(J Leukoc Biol)
Vol. 80
Issue 3
Pg. 659-67
(Sep 2006)
ISSN: 0741-5400 [Print] United States |
PMID | 16844765
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Tumor Suppressor Protein p53
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Topics |
- Cell Death
(immunology)
- Cell Line
- Gene Expression Profiling
- Giant Cells
(immunology, virology)
- HIV-1
(drug effects, immunology, isolation & purification)
- HeLa Cells
- Humans
- RNA Interference
(immunology)
- Retroviridae
(immunology)
- Reverse Transcriptase Polymerase Chain Reaction
(methods)
- Sensitivity and Specificity
- Transcription, Genetic
(immunology)
- Tumor Suppressor Protein p53
(antagonists & inhibitors, genetics, immunology)
- Virus Replication
(drug effects, immunology)
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