title: Enzymatic and chemical stability of 2',3'-dideoxy-2',3'-didehydropyrimidine nucleosides: potential anti-acquired immunodeficiency syndrome agents.
abstract: The enzymatic and chemical stability of three 2',3'-dideoxy-2',3'-didehydropyrimidine nucleosides has been studied. Chemical degradtion of the analogues was measured in the pH range of 1.0-9.0. 2',3'-Dideoxy-2',3'-didehydrocytidine (DDCN) degraded rapidly under acidic conditions, but the chemical stability was greater under basic conditions. The chemical degradation of 2',3'-dideoxy-2',3'-didehydrouridine (DDUN) and 2',3'-dideoxy-2',3'-didehydrothymidine (DDTN) was not pH dependent and was faster than that of cytarabine. Enzymatic degradation of DDCN, DDUN and DDTN was not observed in human plasma, though cytarabine was degraded enzymatically under the same conditions. DDCN was also not degraded in the presence of mouse kidney cytidine deaminase.
authors.forename: T
authors.initials: T
authors.lastname: Kawaguchi
authors.forename: S
authors.initials: S
authors.lastname: Fukushima
authors.forename: M
authors.initials: M
authors.lastname: Ohmura
authors.forename: M
authors.initials: M
authors.lastname: Mishima
authors.forename: M
authors.initials: M
authors.lastname: Nakano
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000188:drug therapy*; D000818:Animals; D000998:Antiviral Agents / Q000032:analysis* / Q000138:chemical synthesis / Q000494:pharmacology; D055598:Chemical Phenomena; D002621:Chemistry; D003561:Cytarabine / Q000032:analysis / Q000494:pharmacology; D015224:Dideoxynucleosides / Q000138:chemical synthesis / Q000494:pharmacology; D004355:Drug Stability; D006801:Humans; D051379:Mice; D018119:Stavudine; D016047:Zalcitabine / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000494:pharmacology
chemical_list: D000998:Antiviral Agents; D015224:Dideoxynucleosides; D003561:Cytarabine; C058925:2',3'-didehydro-2',3'-dideoxyuridine; D016047:Zalcitabine; D018119:Stavudine; C050624:2',3'-dideoxycytidinene