title: 5,6-Dihydro-5-azathymidine: in vitro antiviral properties against human herpesviruses.
abstract: 5,6-Dihydro-5-azathymidine (DHAdT), a novel water-soluble nucleoside antibiotic, inhibits herpes simplex virus type 1 (HSV-1) in appropriately infected cell cultures to a greater extent than herpes simplex virus type 2 (HSV-2). Vaccinia virus was less susceptible than HSV-2, and pseudorabies virus yields were not reduced at the concentrations studied. Plaque formation by varicella-zoster virus was suppressed by DHAdT. DHAdT was slightly toxic to cells at concentrations that were inhibitory for HSV-1 and varicella-zoster virus. Thymidine and deoxyuridine completely reversed the anti-HSV-1 activity of DHAdT, whereas deoxycytidine was partially effective. Compared with other nucleoside analogs with activity for HSV-1, DHAdT was less active than 5-iodo-2'-deoxyuridine or 1-beta-d-arabinofuranosylcytosine and nearly equipotent with 9-beta-d-arabinofuranosyladenine.
mesh_terms: D000818:Animals; D000998:Antiviral Agents; D006801:Humans; D011817:Rabbits; D018139:Simplexvirus / Q000187:drug effects*; D013936:Thymidine / Q000031:analogs & derivatives* / Q000037:antagonists & inhibitors / Q000494:pharmacology; D013997:Time Factors; D014616:Vaccinia virus / Q000187:drug effects
chemical_list: D000998:Antiviral Agents; D013936:Thymidine