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1996-01-30
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Document 0593
DOCN M9610593
TI Viral phenotype and genotype as markers in clinical trials.
DT 9601
AU Katzenstein DA; Center for AIDS Research, Stanford University Medical
Center, CA; 94305, USA.
SO J Acquir Immune Defic Syndr Hum Retrovirol. 1995;10 Suppl 2:S25-34.
Unique Identifier : AIDSLINE MED/96033809
AB Treatment of AIDS and HIV infection is increasingly dependent on the use
of surrogate markers to assess the efficacy of drug and biologic
therapies in individual patients and in the clinical trials. Recent
developments in laboratory techniques have resulted in new assays to
measure circulating viral RNA in HIV-infected individuals, standardized
methods to assess genotypic changes in virus associated with drug
resistance and biologic assays for syncytia-inducing phenotype, a viral
characteristic associated with rapid clinical progression. Studies from
our laboratory have examined the relationship between surrogate markers
of drug efficacy, CD4 cell changes, quantitative HIV plasma RNA and cell
dilution cultures, genotypic changes associated with drug resistance and
the syncytia-inducing phenotype. The results of these studies suggest
that drug-resistance genotype and syncytia-inducing phenotype are
independent factors that contribute to disease progression in patients
receiving zidovudine. The design of studies of drugs and biologics for
the treatment of HIV should include assessment of genotypic and
phenotypic characteristics of HIV in addition to CD4 cell numbers and
virus load.
DE Antiviral Agents/PHARMACOLOGY/THERAPEUTIC USE Biological Markers
Clinical Trials/*METHODS CD4 Lymphocyte Count Disease Progression
Drug Resistance, Microbial/GENETICS DNA, Viral/BLOOD Genotype Giant
Cells Human HIV/DRUG EFFECTS/GENETICS/*PHYSIOLOGY HIV
Infections/THERAPY/*VIROLOGY Phenotype RNA, Viral/BLOOD JOURNAL
ARTICLE REVIEW REVIEW, TUTORIAL
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).