title: Central depressant activities of N3-allyluridine and N3-allylthymidine.
abstract: The pharmacological effects of N3-allyluridine (N3-AUd) and N3-allylthymidine (N3-ATd) on the central nervous system (CNS) were examined by intracerebroventricular (i.c.v.) administration in mice. Pentobarbital (PB)-induced sleep, diazepam (DZ)-induced motor incoordination and spontaneous activity were used as three indices of pharmacological tests. N3-AUd and N3-ATd as well as uridine (Ud) and thymidine (Td); 0.9 mg/mouse, i.c.v., were found to potentiate PB-induced sleep, and their effects were dose dependent. Time course test showed that the most potent effects of all compounds tested on PB-induced sleep were observed at 15 min after the i.c.v. injection of these compounds. N3-AUd and N3-ATd were greater than Ud and Td in PB-induced sleep prolongation. In the DZ-induced motor incoordination experiments, N3-AUd, N3-ATd and Td exerted synergistic effect, although these compounds did not possess the motor incoordination. All compounds decreased the spontaneous activity. These results show that both N3-allylated compounds have more directly depressant effects on the CNS than the parent compounds.
mesh_terms: D000818:Animals; D002552:Cerebral Ventricles / Q000187:drug effects / Q000502:physiology*; D003975:Diazepam / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D007276:Injections, Intraventricular; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009043:Motor Activity / Q000187:drug effects*; D010424:Pentobarbital / Q000494:pharmacology; D012890:Sleep / Q000187:drug effects*; D013936:Thymidine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D013997:Time Factors; D014529:Uridine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology
chemical_list: C049808:N(3)-allyluridine; C049809:N(3)-allylthymidine; D010424:Pentobarbital; D003975:Diazepam; D013936:Thymidine; D014529:Uridine