| Literature DB >> 10725402 |
C D Pauza1, P Trivedi, M Wallace, T J Ruckwardt, H Le Buanec, W Lu, B Bizzini, A Burny, D Zagury, R C Gallo.
Abstract
The Tat protein is essential for HIV type 1 (HIV-1) replication and may be an important virulence factor in vivo. We studied the role of Tat in viral pathogenesis by immunizing rhesus macaques with chemically inactivated Tat toxoid and challenging these animals by intrarectal inoculation with the simian/human immunodeficiency virus 89.6PD. Immune animals had significantly attenuated disease with lowered viral RNA, interferon-alpha, and chemokine receptor expression (CXCR4 and CCR5) on CD4(+) T cells; these features of infection have been linked to in vitro effects of Tat and respond similarly to extracellular Tat protein produced during infection. Immunization with Tat toxoid inhibits key steps in viral pathogenesis and should be included in therapeutic or preventive HIV-1 vaccines.Entities:
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Year: 2000 PMID: 10725402 PMCID: PMC16271 DOI: 10.1073/pnas.97.7.3515
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205