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© Research
Publication : Virology

Dual function of a human immunodeficiency virus (HIV)-specific cytotoxic T-lymphocyte clone: inhibition of HIV replication by noncytolytic mechanisms and lysis of HIV-infected CD4+ cells

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Virology - 01 Nov 1996

Buseyne F, Février M, Garcia S, Gougeon ML, Rivière Y

Link to Pubmed [PMID] – 8918556

Virology 1996 Nov;225(1):248-53

CD8+ T cells may play a beneficial role in human immunodeficiency virus (HIV)-infected patients by two mechanisms. HIV-specific cytotoxic activity and secretion of a soluble mediator(s) that inhibits HIV replication in vitro. Here we characterized both activities mediated by an HIV p24gag-specific cytotoxic T lymphocyte (CTL) CD8+ clone derived from an HIV-infected patient. When the CTL clone was mixed with HIV-infected autologous CD4+ T cells, viral replication was suppressed. This viral inhibition was observed in heterologous CD4+ T cells and when CD8+ and CD4+ populations were separated by a semipermeable membrane, demonstrating the involvement of a diffusible factor(s). The lysis of autologous HIV-infected T cells was also detected. However, HIV suppression was more efficient when CD4+ and CD8+ T cells shared major histocompatibility complex alleles and were in direct contact. Thus, one and the same CD8+ T cell population can mediate both lysis of HIV-infected targets and nonlytic suppression of HIV replication. These results underline the multiple roles of CD8+ T lymphocytes in the suppression of HIV-infected cells.

http://www.ncbi.nlm.nih.gov/pubmed/8918556