title: Neuropharmacological activities of the crude alkaloidal fraction from stems of Tabernaemontana pandacaqui Poir.
abstract: The crude alkaloidal (CA) fraction from the stem of Tabernaemontana pandacaqui Poir. was studied for its pharmacological activity on the central nervous system (CNS) of animals. The CA fraction was found to produce symptoms of CNS depression in conscious rats and mice, viz. reduction in spontaneous motility, potentiation of pentobarbital sleeping time, prolongation of latency of convulsions induced by pentylenetetrazole and antinociception. However, the fraction could not antagonize oxotremorine-induced tremor. The observations suggest that the CA fraction possesses a CNS depressant activity.
authors.affiliation: Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Thailand.
authors.forename: T
authors.initials: T
authors.lastname: Taesotikul
authors.forename: A
authors.initials: A
authors.lastname: Panthong
authors.forename: D
authors.initials: D
authors.lastname: Kanjanapothi
authors.forename: R
authors.initials: R
authors.lastname: Verpoorte
authors.forename: J J
authors.initials: JJ
authors.lastname: Scheffer
mesh_terms: D000470:Alkaloids / Q000494:pharmacology*; D000700:Analgesics / Q000494:pharmacology*; D000818:Animals; D000927:Anticonvulsants / Q000494:pharmacology*; D002490:Central Nervous System / Q000187:drug effects*; D004347:Drug Interactions; D051379:Mice; D009043:Motor Activity / Q000187:drug effects; D010095:Oxotremorine / Q000494:pharmacology; D010424:Pentobarbital / Q000494:pharmacology; D010433:Pentylenetetrazole / Q000494:pharmacology; D010936:Plant Extracts / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013997:Time Factors
chemical_list: D000470:Alkaloids; D000700:Analgesics; D000927:Anticonvulsants; D010936:Plant Extracts; D010095:Oxotremorine; D010424:Pentobarbital; D010433:Pentylenetetrazole