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M9620379.TXT
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1996-02-26
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Document 0379
DOCN M9620379
TI Activation of human immunodeficiency virus type 1 in monocytoid cells by
the protozoan parasite Leishmania donovani.
DT 9602
AU Bernier R; Turco SJ; Olivier M; Tremblay M; Centre de Recherche en
Infectiologie, Centre Hospitalier de; l'Universite Laval, Faculte de
Medecine, Universite Laval,; Ste-Foy Quebec, Canada.
SO J Virol. 1995 Nov;69(11):7282-5. Unique Identifier : AIDSLINE
MED/96013837
AB 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.
DE Acquired Immunodeficiency Syndrome/PHYSIOPATHOLOGY Animal
Antibodies/PHARMACOLOGY Cell Differentiation Cell Line
Glycosphingolipids/*PHARMACOLOGY Human HIV-1/DRUG EFFECTS/GROWTH &
DEVELOPMENT/*PHYSIOLOGY Leishmania donovani/*PHYSIOLOGY Monocytes
Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S.
Tetradecanoylphorbol Acetate/PHARMACOLOGY Tumor Necrosis
Factor/*BIOSYNTHESIS/IMMUNOLOGY *Virus Activation/DRUG EFFECTS Virus
Latency JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).