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M9460296.TXT
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1994-06-12
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Document 0296
DOCN M9460296
TI Divergent anti-human immunodeficiency virus activity and anabolic
phosphorylation of 2',3'-dideoxynucleoside analogs in resting and
activated human cells.
DT 9408
AU Gao WY; Agbaria R; Driscoll JS; Mitsuya H; Experimental Retrovirology
Section, National Cancer Institute,; Bethesda, Maryland 20892.
SO J Biol Chem. 1994 Apr 29;269(17):12633-8. Unique Identifier : AIDSLINE
MED/94230334
AB The mechanism of divergent anti-human immunodeficiency virus type 1
(HIV-1) activity of various 2',3'-dideoxynucleoside analogs (ddNs) in
peripheral blood mononuclear cells (PBM) was studied. We demonstrate
that the in vitro anti-HIV-1 activity of various ddNs varies profoundly
and that the divergent antiviral activity is related to the extent of
anabolic phosphorylation of each ddN and its counterpart
2'-deoxynucleoside (dN). We also show that certain ddNs cause a
reduction of their counterpart dNTP formation in PBM in the following
order: 2',3'-dideoxycytidine (ddC) >>
2',3'-didehydro-2',3'-dideoxythymidine (d4T),
3'-thia-2',3'-dideoxycytidine (3TC), 2',3'-dideoxyinosine (ddI),
2',3'-dideoxyguanosine (ddG) > 3'-azido-2',3'-dideoxythymidine (AZT) >
2'-beta-fluoro-2',3'-dideoxyadenosine (F-ara-ddA). Based on the
phosphorylation profiles, anti-HIV-1 ddNs can be classified into two
groups: (i) cell-activation-dependent ddNs such as AZT and d4T that are
preferentially phosphorylated, yield higher ratios of ddNTP/dNTP, and
exert more potent anti-HIV-1 activity in activated cells than in resting
cells; and (ii) cell-activation-independent ddNs including ddI (and
2',3'-dideoxyadenosine), F-ara-ddA, ddG, ddC, and 3TC that produce
higher ratios of ddNTP/dNTP and exert more potent anti-HIV-1 activity in
resting cells. These data should provide a basis for the elucidation of
the mechanism of the divergent antiretroviral activity of ddNs.
DE Cells, Cultured Deoxycytidine Kinase/METABOLISM
Didanosine/PHARMACOLOGY Dideoxynucleosides/*PHARMACOLOGY Human
HIV-1/*DRUG EFFECTS Monocytes/DRUG EFFECTS/ENZYMOLOGY/MICROBIOLOGY
Phosphorylation Phytohemagglutinins/PHARMACOLOGY Thymidine
Kinase/METABOLISM Zidovudine/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).