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M9610585.TXT
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1996-01-30
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Document 0585
DOCN M9610585
TI In vitro comparison of selected triple-drug combinations for suppression
of HIV-1 replication: the Inter-Company Collaboration Protocol.
DT 9601
AU St. Clair MH; Pennington KN; Rooney J; Barry DW; Division of Virology,
Burroughs Wellcome Co., Research Triangle; Park, NC 27709, USA.
SO J Acquir Immune Defic Syndr Hum Retrovirol. 1995;10 Suppl 2:S83-91.
Unique Identifier : AIDSLINE MED/96033817
AB Ten different three-drug combinations have been analyzed for their
ability to prevent HIV-induced cytopathic effects (CPEs) in a continuous
human T-lymphoblastoid cell line. Agents acting at the same as well as
at different sites in the HIV-1 replicative cycle were used. Each
compound was analyzed at peak and trough plasma levels achieved in
monotherapy and in the presence of HIV-1 strains 3B and MN at a viral
inoculum varying from 1 x TCID50 (50% tissue culture inhibitory dose) to
1,000 x TCID50. Using a viral inoculum of 10 x TCID50 HIV-1 3B, it was
determined that triple-drug combinations had greater antiviral
activities than the corresponding double-drug combinations, which had
greater antiviral activities than zidovudine (AZT) monotherapy. The most
consistent triple-drug combination, demonstrating superior activity at
all concentrations of virus, was AZT + dideoxyinosine + lamivudine which
reduced the AZT IC95 (95% inhibitory concentration) by 208-, 57-, 133-,
and 25-fold at of 1,000, 100, 10, and 1 x TCID50 HIV-1 3B, respectively,
as compared with the IC95 for AZT monotherapy. For all antiviral
regimens tested, higher viral inoculum resulted in less inhibition of
viral replication and a higher IC95 for AZT. This observation argues for
therapeutic intervention at an earlier stage in HIV infection, when
viral burden is lower.
DE Antiviral Agents/*PHARMACOLOGY Cell Line, Transformed Cytopathogenic
Effect, Viral/DRUG EFFECTS Didanosine/PHARMACOLOGY Drug Synergism
Human HIV Protease Inhibitors/*PHARMACOLOGY HIV-1/*DRUG
EFFECTS/PHYSIOLOGY Isoquinolines/PHARMACOLOGY Pyridines/PHARMACOLOGY
Quinolines/PHARMACOLOGY Reverse Transcriptase Inhibitors/*PHARMACOLOGY
Virus Replication/*DRUG EFFECTS Zalcitabine/ANALOGS &
DERIVATIVES/PHARMACOLOGY Zidovudine/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).