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M94A0342.TXT
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1994-10-08
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Document 0342
DOCN M94A0342
TI Organic thiophosphate WR-151327 suppresses expression of HIV in
chronically infected cells.
DT 9412
AU Kalebic T; Schein PS; Laboratory of Molecular Genetics, National Cancer
Institute,; National Institutes of Health, Bethesda, Maryland 20892.
SO AIDS Res Hum Retroviruses. 1994 Jun;10(6):727-33. Unique Identifier :
AIDSLINE MED/94355119
AB Reducing agents such as glutathione (GSH), glutathione ester (GSE), and
N-acetylcysteine (NAC) have been shown to suppress the induction of HIV
expression in chronically infected cells stimulated by cytokines. We
present data which show the effects of the organic thiophosphate
WR-151327 on the expression of latent HIV in U1 cells. The chronically
infected promonocytic cell line U1 constitutively expresses low levels
of HIV that can be increased by 13-phorbol 12-myristate acetate (PMA),
tumor necrosis factor alpha (TNF-alpha), and granulocyte/monocyte
colony-stimulating factor (GM-CSF). WR-151327 suppressed, in
dose-dependent fashion, the reverse transcriptase (RT) activity induced
by TNF-alpha, GM-CSF, and PMA. The maximal decrease in RT activity was
70, 80, and 50%, respectively. Pretreatment with WR-151327 also
suppressed the induction of total HIV protein synthesis, as shown by
Western blot analysis. In addition, WR-151327 suppressed HIV-LTR-CAT
activity in transfected human rhabdomyosarcoma cells (RD). Suppression
of HIV expression by WR-151327 was observed in the absence of a
cytotoxic or cytostatic effect. Incubation of WR-151327 with human
recombinant TNF-alpha for 6 hr at 37 degrees C did not alter the
capacity of TNF-alpha to induce the expression of HIV. Our observations
further support the hypothesis that reducing agents are important in the
control of HIV replication and that the clinical evaluation of WR-151327
may be indicated.
DE Amifostine/ANALOGS & DERIVATIVES/*PHARMACOLOGY Cell Line/DRUG
EFFECTS/MICROBIOLOGY Cytokines/PHARMACOLOGY HIV Infections/*DRUG
THERAPY HIV-1/*DRUG EFFECTS Organothiophosphorus
Compounds/*PHARMACOLOGY Reverse Transcriptase/METABOLISM Sulfhydryl
Compounds/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).