Journal of Pharmaceutical Sciences p. 246 - 249 (1985)
Update date:2022-08-02
Topics:
Stuart
Ayisi
Tourigny
Gupta
The antiviral activity, effect on cellular DNA and RNA synthesis, and cytotoxicity toward mammalian cells of 5-fluoro-2'-deoxyuridine, 5-methoxymethyl-2'-deoxyuridine, 2'-deoxythymidine, and their corresponding 3'-p-nitrophenylphosphate and 3'-p-aminophenylphosphate derivatives were determined. The 3'-p-aminophenylphosphate-2'-deoxy-5-methoxymethyluridine derivative was as potent as 5-methoxymethyl-2'-deoxyuridine in inhibiting herpes simplex viruses; however, 3'-p-aminophenylphosphate-2'-deoxy-5-fluorouridine was less potent than 5-fluoro-2'-deoxyuridine in inhibiting viral replication. The results suggest that the deoxypyrimidine ribonucleoside kinase has bulk tolerance for substituents at the 3-position of the ribofuranose moiety. The effect on cellular DNA and RNA synthesis and cytotoxicity toward mammalian cells were monitored by studying the incorporation of radioactive precursors. 5-Methoxymethyl-2'-deoxyuridine and 3'-p-aminophenylphosphate-2'-deoxy-5-methoxymethyluridine failed to inhibit DNA or RNA synthesis. 5-Fluoro-2'-deoxyuridine and 3'-p-aminophenylphosphate-2'-deoxy-5-fluorouridine decreased incorporation of [3H]deoxyuridine by 50% at 1.0 and 40 μM, respectively. Cytotoxicity (microscopic lesions using monolayer cells) on exposure to 5-methoxymethyl-2'-deoxyuridine, 3'-p-aminophenylphosphate-2'-deoxy-5-methoxymethyluridine, 5-fluoro-2'-deoxyuridine, and 3'-p-aminophenylphosphate-2'-deoxy-5-fluorouridine was observed at 3800, 1600, 1.6, and 110 μM, respectively.
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(1985)