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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.

Activation of human immunodeficiency virus type 1 in monocytoid cells by the protozoan parasite Leishmania donovani.

R Bernier, S J Turco, M Olivier, M Tremblay
R Bernier
Centre de Recherche en Infectiologie, Centre Hospitalier de l'Université Laval, Faculté de Médecine, Université Laval, Ste-Foy Québec, Canada.
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S J Turco
Centre de Recherche en Infectiologie, Centre Hospitalier de l'Université Laval, Faculté de Médecine, Université Laval, Ste-Foy Québec, Canada.
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M Olivier
Centre de Recherche en Infectiologie, Centre Hospitalier de l'Université Laval, Faculté de Médecine, Université Laval, Ste-Foy Québec, Canada.
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M Tremblay
Centre de Recherche en Infectiologie, Centre Hospitalier de l'Université Laval, Faculté de Médecine, Université Laval, Ste-Foy Québec, Canada.
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ABSTRACT

In this study, we demonstrated that the protozoan parasite Leishmania donovani and one of its major surface molecules, the lipophosphoglycan (LPG), can induce human immunodeficiency virus type 1 (HIV-1) expression in U1 and OM-10.1, two cell lines of monocytoid origin latently infected with HIV-1. Treatment of U1 cells with various concentrations of LPG (1, 5, and 10 microM) resulted in a dose-dependent secretion of tumor necrosis factor alpha (TNF-alpha). Suppression of LPG-induced HIV-1 expression by polyclonal anti-TNF-alpha antibodies further confirmed the involvement of this cytokine. Results from these studies indicate that the protozoan parasite L. donovani can induce the secretion of TNF-alpha that will function in an autocrine or paracrine manner to upregulate HIV-1 expression. Our data suggest for the first time that this protozoan parasite can be viewed as a potential cofactor in the pathogenesis of AIDS.

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Activation of human immunodeficiency virus type 1 in monocytoid cells by the protozoan parasite Leishmania donovani.
R Bernier, S J Turco, M Olivier, M Tremblay
Journal of Virology Nov 1995, 69 (11) 7282-7285; DOI:

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Activation of human immunodeficiency virus type 1 in monocytoid cells by the protozoan parasite Leishmania donovani.
R Bernier, S J Turco, M Olivier, M Tremblay
Journal of Virology Nov 1995, 69 (11) 7282-7285; DOI:
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