RT Journal Article SR Electronic T1 Antiviral, antimetabolic, and cytotoxic activities of 5-substituted 2'-deoxycytidines. JF Molecular Pharmacology JO Mol Pharmacol FD American Society for Pharmacology and Experimental Therapeutics SP 217 OP 223 VO 21 IS 1 A1 E De Clercq A1 J Balzarini A1 J Descamps A1 G F Huang A1 P F Torrence A1 D E Bergstrom A1 A S Jones A1 P Serafinowski A1 G Verhelst A1 R T Walker YR 1982 UL http://molpharm.aspetjournals.org/content/21/1/217.abstract AB Various 5-substituted 2'-deoxycytidines, including 5-bromo-dCyd, 5-iodo-dCyd, 5-nitro-dCyd, 5-ethynyl-dCyd, 5-propyl-dCyd, (E)-5-(2-bromovinyl)-dCyd, and (E)-5-(2-iodovinyl)-dCyd, were evaluated for their antiviral and antimetabolic properties in primary rabbit kidney (PRK) cell cultures and for their inhibitory effects on murine L1210 cell proliferation. All dCyd analogues proved to be selective inhibitors of herpes simplex virus (HSV) replication: 5-bromo-dCyd, 5-iodo-dCyd, 5-nitro-dCyd, and 5-ethynyl-dCyd were more selective in their anti-HSV activity than were the corresponding 5-substituted 2'-deoxyuridines, whereas 5-propyl-dCyd, (E)-5-(2-bromovinyl)-dCyd, and (E)-5-(2-iodovinyl)-dCyd were as selective as their dUrd counterparts. The dCyd analogues were also less cytotoxic (for both PRK and L1210 cells), as could be monitored by inhibition of either cell proliferation or host-cell DNA synthesis (incorporation of radiolabeled precursors). Of all 5-substituted 2'-deoxycytidines tested, the (E)-5-(2-halogenovinyl) derivatives emerged as the most potent and most selective inhibitors of HSV (Type 1) replication.