home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Collection of Education
/
collectionofeducationcarat1997.iso
/
HEALTH
/
MED9602.ZIP
/
M9620024.TXT
< prev
next >
Wrap
Text File
|
1996-02-26
|
3KB
|
44 lines
Document 0024
DOCN M9620024
TI Efficacy of AZT therapy in reducing p24 antigen burden in a modified
SCID mouse model of HIV infection.
DT 9602
AU Alder J; Hui YH; Clement J; Department 47T, Abbott Laboratories, Abbott
Park, IL 60064-3500,; USA.
SO Antiviral Res. 1995 May;27(1-2):85-97. Unique Identifier : AIDSLINE
MED/96075697
AB A modified severe combined immunodeficient (SCID) mouse model of HIV
infection which utilized multiple reconstitutions with human lymphocytes
and a large inoculum of HIV was investigated. This mouse model yielded
splenic HIV p24 antigen concentrations detectable by standard clinical
means. The concentration of p24 exceeded 600 pg/g of spleen through 4
weeks postinfection. A 1-week course of AZT therapy initiated after
infection produced a dose responsive reduction in p24 antigen burden. Up
to a 95% reduction in p24 antigen burden was observed following AZT
therapy at 50 mg/kg/day, while AZT therapy at 5 and 0.5 mg/kg/day
produced 52 and 18% reductions. In vitro and pharmacokinetic evaluations
correlated potency and tissue concentrations of AZT with treatment
efficacy. Active HIV replication in the SCID mice was suggested by both
the recovery of viable virus from SCID spleens, and by the efficacy of a
brief course of AZT therapy. This SCID mouse model of HIV infection was
more quantitative than previous mouse models that utilize PCR-based
techniques for detection of HIV. The high HIV burden in this SCID mouse
model allowed reductions in p24 concentration to be monitored in
response to AZT therapy. A dose response to AZT therapy was
demonstrated, even when the first dose was administered after infection.
This result suggests greater sensitivity than in previous models in
which pretreatment with AZT was required to produce a protective
response. This SCID mouse model may be useful for determining efficacy
of experimental HIV therapeutics prior to clinical use. An effective
animal model could result in a reduction in cost and more rapid
development of effective HIV therapeutics.
DE Animal Cell Line *Disease Models, Animal Female Human HIV Core
Protein p24/*DRUG EFFECTS/METABOLISM HIV Infections/*DRUG
THERAPY/VIROLOGY Mice Mice, Inbred BALB C Mice, SCID
Spleen/METABOLISM/VIROLOGY Time Factors
Zidovudine/*PHARMACOLOGY/PHARMACOKINETICS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).