INHIBITION OF MURINE MACROPHAGE NITRIC-OXIDE SYNTHASE EXPRESSION BY APIVOXIL PRODRUG OF ANTIVIRAL ACYCLIC NUCLEOTIDE ANALOG 9-(2-PHOSPHONOMETHOXYETHYL)ADENINE
Z. Zidek et al., INHIBITION OF MURINE MACROPHAGE NITRIC-OXIDE SYNTHASE EXPRESSION BY APIVOXIL PRODRUG OF ANTIVIRAL ACYCLIC NUCLEOTIDE ANALOG 9-(2-PHOSPHONOMETHOXYETHYL)ADENINE, Biochemical pharmacology, 54(8), 1997, pp. 855-861
The effect of the acyclic nucleotide analogue, 9-(2-phosphonomethoxyet
hyl)adenine (PMEA, Adefovir), and its (bis)pivaloyloxymethyl ester (bi
s-POM-PMEA, Adefovir Dipivoxil) on in vitro nitric oxide (NO) producti
on by murine peritoneal macrophages was investigated. Bis-POM-PMEA inh
ibited in a concentration-dependent manner the formation of NO generat
ed by interferon-gamma and lipopolysaccharide, the IC50 being 15 mu M.
Suppressed transcription of mRNA for inducible NO synthase (EC 1.14.1
3.39) resulting in decreased synthesis of NO synthase protein was foun
d. Parent compound PMEA was virtually ineffective. (C) 1997 Elsevier S
cience Inc.