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1996-02-26
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Document 0029
DOCN M9620029
TI K65R mutation of human immunodeficiency virus type 1 reverse
transcriptase encodes cross-resistance to
9-(2-phosphonylmethoxyethyl)adenine.
DT 9602
AU Gu Z; Salomon H; Cherrington JM; Mulato AS; Chen MS; Yarchoan R; Foli A;
Sogocio KM; Wainberg MA; McGill University AIDS Centre, Jewish General
Hospital, Montreal,; Quebec, Canada.
SO Antimicrob Agents Chemother. 1995 Aug;39(8):1888-91. Unique Identifier :
AIDSLINE MED/96100773
AB Cloned variants of human immunodeficiency virus type 1 that contain the
K65R mutation in reverse transcriptase have previously been shown to
display approximately 10- to 30-fold resistance against
2',3'-dideoxycytidine, 2',3'-dideoxyinosine, and
2',3'-dideoxy-3'-thiacytidine. On the basis of tissue culture studies
with both primary T cells and established cell lines, we now report that
the K65R mutation confers approximately 12- to 15-fold resistance to
9-(2-phosphonylmethoxyethyl)adenine (PMEA). Likewise, a chain
termination system revealed that mutated recombinant K65R reverse
transcriptase displays resistance to PMEA diphosphate, the active
metabolite of PMEA, in cell-free enzyme assays. Parallel studies have
shown that the M184V mutation in reverse transcriptase, associated with
high-level resistance against the (-) enantiomer of
2',3'-dideoxy-3'-thiacytidine, does not confer resistance to PMEA in
tissue culture. Viruses and enzymes that included both the K65R and
M184V mutations were resistant to PMEA and PMEa diphosphate,
respectively, but only to the extent conferred by the K65R mutation
alone.
DE Adenine/*ANALOGS & DERIVATIVES/PHARMACOLOGY Antiviral
Agents/*PHARMACOLOGY Cell-Free System Cloning, Molecular Drug
Resistance, Microbial/GENETICS Human HIV Infections/MICROBIOLOGY
HIV-1/*ENZYMOLOGY/*GENETICS RNA-Directed DNA
Polymerase/*GENETICS/*METABOLISM Support, Non-U.S. Gov't Tissue
Culture JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).