home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Software Vault: The Sapphire Collection
/
Software Vault (Sapphire Collection) (Digital Impact).ISO
/
cdr16
/
med9410d.zip
/
M94A0742.TXT
< prev
next >
Wrap
Text File
|
1994-10-21
|
2KB
|
30 lines
Document 0742
DOCN M94A0742
TI Mechanisms of AZT resistance in HIV isolates.
DT 9412
AU Buchanan L; Tachedjian G; Birch C; Virology Department, Fairfield
Hospital, Victoria.
SO Annu Conf Australas Soc HIV Med. 1993 Oct 28-30;5:101 (poster no. 53).
Unique Identifier : AIDSLINE ASHM5/94348913
AB AIM: To investigate the susceptibility of the reverse transcriptase (RT)
and ribonuclease H (RNase H) from AZT-sensitive (AZT-S) and
AZT-resistant (AZT-R) HIV isolates to AZT-triphosphate (AZTTP) and
AZT-monophosphate (AZTMP). METHODS: Isolates obtained from a patient
before and after long-term AZT therapy were examined for susceptibility
to AZT. RT and RNase H from these isolates were analysed in in vitro
assays to determine their susceptibilities to AZTTP and AZTMP
respectively. RESULTS AND CONCLUSIONS: Amino acid changes occurring in
the HIV RT after long-term AZT therapy result in phenotypic AZT
resistance. However, altered susceptibility cannot be definitely
associated with the effects of AZTTP on RT or AZTMP on RNase H using
enzyme assays, suggesting that the assay procedures used are not optimal
or that alternative mechanisms of action are operating for AZT.
DE Drug Resistance, Microbial/GENETICS Human HIV/*DRUG EFFECTS/GENETICS
Mutation/GENETICS Phenotype Reverse Transcriptase/GENETICS
Ribonuclease H, Calf Thymus/GENETICS Zidovudine/*PHARMACOLOGY MEETING
ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).