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M94A0726.TXT
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1994-10-21
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Document 0726
DOCN M94A0726
TI PCR analysis for common HIV-1 zidovudine resistance mutations in pol DNA
of untreated and zidovudine treated patients.
DT 9412
AU Salem H; Nightingale B; Garsia RJ; Molecular Biology Department, Royal
Prince Alfred Hospital,; Camperdown, NSW.
SO Annu Conf Australas Soc HIV Med. 1993 Oct 28-30;5:109 (poster no. 69).
Unique Identifier : AIDSLINE ASHM5/94348929
AB METHODS: Mutations of the HIV-1 pol gene, causing amino acid changes at
codons 41, 67, 70, 215 and 219, were sought in DNA of serial HIV-1
infected patients. Exposure to Zidovudine (ZDV) was nil in 12 cases and
ranged from < 4 weeks to > 36 months in the remaining 55 samples. The
PCR amplified two regions of pol encompassing the five codons of
interest which were sequenced. RESULTS: The frequency of at least one
mutated codon was 41% in ZDV naive patients and 100% after 3 years ZDV
use. Codon 215 mutation, a high level ZDV resistance mutation, increased
in prevalence after 24 months of ZDV and was seen in 57% of samples with
> 36 months ZDV but in only 8% of those with 19-24 months ZDV. (see
table below) CONCLUSION: Mutation in HIV-1 reverse transcriptase is
common after ZDV exposure but also occurs in its absence. High level
resistance mutation (codon 215) is uncommon until more than two years of
ZDV monotherapy. TABULAR DATA, SEE ABSTRACT VOLUME.
DE Amino Acid Sequence/GENETICS Codon Drug Resistance, Microbial/GENETICS
Gene Expression Regulation, Viral/DRUG EFFECTS Genes, pol/*GENETICS
Human HIV Infections/*DRUG THERAPY HIV-1/*DRUG EFFECTS/GENETICS
Long-Term Care Mutation/*DRUG EFFECTS Polymerase Chain Reaction
Reverse Transcriptase/ANTAGONISTS & INHIB/GENETICS
Zidovudine/*THERAPEUTIC USE MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).