[General pharmacological action of tritoqualine (TRQ; (+/-)-(R*)-7-amino-4, 5, 6-triethoxy-3-[(R*)-5, 6, 7, 8-tetrahydro-4-methoxy-6-methyl-1, 3-dioxolo [4, 5-g] isoquinolin-5-yl] phthalide].
The general pharmacological action of TRQ was investigated, and the following results were obtained: With regard to its influence on the central nervous system, TRQ moderately potentiated the actions of hexobarbital (sleeping time) and methamphetamine (stereotyped behavior) at doses above 100 mg/kg, p.o. TRQ, however, had little influence on behavioral changes, EEG and motor function. TRQ only had slight influence on the respiratory and cardiovascular system at doses ranging from 0.1 to 3 mg/kg, i.v. Significant decrease in SBP and increases of HR, FAF and respiratory rate were observed after high doses (10-30 mg/kg, i.v.) of TRQ. TRQ also had little influence on contractility and pacemaker in isolated hearts, but moderately increased the coronary flow. The inhibitory effect of TRQ on the isolated smooth muscle was observed at high concentration and was non-specific. Furthermore, TRQ exhibited little influence on the autonomic nervous system. Among the effects of TRQ on the gastrointestinal system, it was shown that TRQ moderately increased the outflow of bile after doses above 1 mg/kg, i.v. TRQ also showed no remarkable actions on other aspects of the gastrointestinal system and blood coagulation system. Considering the present results, it may be suggested that there should be no serious problems in the application of TRQ as a hepatoprotective agent.
D000818:Animals; D001777:Blood Coagulation / Q000187:drug effects; D002319:Cardiovascular System / Q000187:drug effects; D002415:Cats; D002490:Central Nervous System / Q000187:drug effects; D004064:Digestive System / Q000187:drug effects; D004285:Dogs; D005260:Female; D006168:Guinea Pigs; D007546:Isoquinolines / Q000494:pharmacology*; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009130:Muscle, Smooth / Q000187:drug effects; D009469:Neuromuscular Junction / Q000187:drug effects; D010974:Platelet Aggregation / Q000187:drug effects; D011817:Rabbits; D051381:Rats; D011919:Rats, Inbred Strains; D012018:Reflex / Q000187:drug effects; D012137:Respiratory System / Q000187:drug effects
D007546:Isoquinolines; C003722:tritoqualine