title: Moduratory effect of Thai traditional medicine (Yahom Tultavai) on hepatic cytochrome P450 enzymes and pentobarbital-induced sleeping in mice.
abstract: Yahom Tultavai is a Thai traditional medicine that has been widely used for the treatment of nausea, vomiting, dizziness and weakness in aged-people, especially. Its formula contains several medicinal plants, and one of them is Kaempferia galanga L., which has ethyl-p-methoxycinnamate (EPMC) as its major compound. Recently, several herbs and traditional medicines have been reported to demonstrate herbal-drug interaction with conventional medicines. This study aims to investigate the effect of Yahom Tultavai extracts on hepatic cytochrome P450 enzymes and pentobarbital-induced sleeping in mice. Three extracts of Yahom Tultavai, using dichloromethane, methanol and distilled water as solvents were orally administered for 28 days prior to determine CYP1A1, CYP1A2, CYP2B, CYP2E1 and CYP3A4 activities. All three extracts significantly inhibited CYP1A1, CYP1A2 and CYP 2E1 activities, but only dichloromethane extract enhanced CYP2B activity. In addition, all three extracts had no effect on CYP3A4 activity. As an indicator for metabolic drug interaction, pentobarbital-induced sleeping time was decreased in connection with the induction of CYP2B activity between 7 and 28 days of dichloromethane extract and EPMC-treated animals when compared to control. In conclusion, Yahom Tultavai extracts affected hepatic microsomal CYP enzyme activities and reduced pentobarbital-induced sleeping time in mice. The results suggest that Yahom Tultavai may potentially cause herbal and conventional drug interaction, which can affect the clinical implication of drug action. Therefore, the co-administration of Yahom Tultavai with certain drugs should be carefully considered.
authors.affiliation: Faculty of Sciences, Khon Kaen University, Faculty of Pharmaceutical Sciences, Khon Kaen 40002, Thailand.
authors.forename: Wanna
authors.initials: W
authors.lastname: Sirisangtragul
authors.forename: Bungorn
authors.initials: B
authors.lastname: Sripanidkulchai
mesh_terms: D000818:Animals; D002934:Cinnamates / Q000494:pharmacology*; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D041743:Herb-Drug Interactions; D006993:Hypnotics and Sedatives / Q000494:pharmacology; D008099:Liver / Q000187:drug effects* / Q000201:enzymology; D008297:Male; D008519:Medicine, Traditional; D051379:Mice; D008813:Mice, Inbred ICR; D008862:Microsomes, Liver / Q000187:drug effects / Q000201:enzymology; D010424:Pentobarbital / Q000494:pharmacology*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D012890:Sleep / Q000187:drug effects*; D013785:Thailand; D030521:Zingiberaceae / Q000737:chemistry
chemical_list: D002934:Cinnamates; D006993:Hypnotics and Sedatives; D010936:Plant Extracts; C531364:ethyl 4-methoxycinnamate; D003577:Cytochrome P-450 Enzyme System; D010424:Pentobarbital
keywords: Thai traditional medicine; Yahom Tultavai; cytochrome P450; herbal-drug interaction; pentobarbital-induced sleeping