Comparative inhibition of hepatitis B virus DNA polymerase and cellular DNA polymerases by triphosphates of sugar-modified 5-methyldeoxycytidines and of other nucleoside analogs

Antimicrob Agents Chemother. 1991 Jun;35(6):1254-7. doi: 10.1128/AAC.35.6.1254.


Of a series of 14 nucleoside 5'-triphosphates, those of 2',3'-dideoxy-3'-fluoro-5-methylcytidine, 3'-azido-2',3'-dideoxy-5-methylcytidine, 2',3'-dideoxy-3'-fluoroguanosine, 2',3'-didehydro-2',3'-dideoxy-5-methylcytidine, 2',3'-dideoxy-3'-fluoro-5-ethylcytidine, and 2',3'-dideoxy-3'-fluoroadenosine emerged as the most potent inhibitors of hepatitis B virus DNA polymerase (50% inhibitory dose, 0.03 to 0.35 microM). In contrast, cellular DNA polymerases proved to be resistant to (alpha) or partially affected by (beta) these analogs. These compounds are among the most effective and selective inhibitors of endogenous hepatitis B virus DNA polymerase recognized to date.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Deoxycytidine / analogs & derivatives*
  • Deoxycytidine / pharmacology
  • Hepatitis B virus / enzymology*
  • Kinetics
  • Nucleic Acid Synthesis Inhibitors*
  • Nucleosides / pharmacology
  • Phosphates / pharmacology


  • Nucleic Acid Synthesis Inhibitors
  • Nucleosides
  • Phosphates
  • Deoxycytidine
  • 5-methyldeoxycytidine