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M9550843.TXT
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1995-03-25
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Document 0843
DOCN M9550843
TI Characterization of the anti-HIV-1 activity of
3,4-dihydro-2-alkoxy-6-benzyl-4-oxopyrimidines (DABOs), new
non-nucleoside reverse transcriptase inhibitors.
DT 9505
AU Tramontano E; Marongiu ME; de Montis A; Loi AG; Artico M; Massa S; Mai
A; la Colla P; Dipartimento di Biologia Sperimentale, Universita di
Cagliari,; Italy.
SO Microbiologica. 1994 Oct;17(4):269-79. Unique Identifier : AIDSLINE
MED/95166036
AB Novel 3,4-dihydro-6-benzyl-4-oxopyrimidines (DABOs), variously
substituted at both the C-2 and C-5 positions of the pyrimidine ring,
proved to be specific inhibitors of the human immunodeficiency virus
type 1 (HIV-1) in vitro. Some compounds showed potency at micromolar
doses, no cytotoxicity at the maximum testable doses and selectivity
indexes comparable to that of 2'-3'-dideoxyinosine (ddI). Mode of action
studies suggested that DABOs interfered with a step of the virus
multiplication cycle following adsorption and preceding integration.
Enzyme assays indicated that DABOs targeted HIV-1 reverse transcriptase:
they inhibited the RNA-dependent DNA polymerase activity in a
template-dependent manner and, to a lesser extent, the DNA-dependent DNA
polymerase activity. No inhibition of the RNase-H associated activity
was observed. When DABOs were assayed in combination with
3'-azido-3'-dideoxythymidine (AZT) or ddI against HIV-1 in cell
cultures, a slightly synergistic inhibitory effect was observed. The
combination of DABO 546 and AZTTP in enzyme assays showed that the two
compounds were kinetically mutually exclusive.
DE Antiviral Agents/CHEMISTRY/*PHARMACOLOGY/TOXICITY Cells, Cultured
Comparative Study Drug Interactions HIV-1/*DRUG
EFFECTS/ENZYMOLOGY/GROWTH & DEVELOPMENT
Pyrimidines/*PHARMACOLOGY/TOXICITY Pyrimidinones/PHARMACOLOGY Reverse
Transcriptase/*ANTAGONISTS & INHIB Support, Non-U.S. Gov't Thymine
Nucleotides/PHARMACOLOGY Virus Replication/DRUG EFFECTS
Zidovudine/ANALOGS & DERIVATIVES/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).