title: Pharmacokinetics of 20(S)-25-methoxyl-dammarane-3beta, 12beta, 20-triol and its active metabolite after oral and intravenous administration in rat.
abstract: The pharmacokinetics behaviour of 20(S)-25-methoxyl-dammarane-3beta, 12beta, 20-triol (25-OCH3-PPD) and its active metabolite after oral and intravenous administration in rats were studied. Rats were administered 2.5, 5.0, and 10 mg kg(-1) 25-OCH3-PPD orally after an overnight fasting or by intravenous injection of 5 mg kg(-1) 25-OCH3-PPD via the tail vein. Plasma concentration-time profiles of 25-OCH3-PPD and its active metabolite 25-O-demethylated (25-OH-PPD) in rats were monitored by liquid chromatography-tandem mass spectroscopy (HPLC-MS-MS). The 25-O-demethylated metabolite appears to be a pathway in the phase I metabolism of 25-OCH3-PPD in rats. The plasma concentration of the metabolite was higher than that of the parent compound.
authors.affiliation: Shenyang Pharmaceutical University, Shenyang, P. R. China.
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Xu
authors.forename: D
authors.initials: D
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Gu
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001681:Biological Assay; D005260:Female; D007275:Injections, Intravenous; D008297:Male; D013058:Mass Spectrometry; D051381:Rats; D017208:Rats, Wistar; D015203:Reproducibility of Results; D013997:Time Factors; D014315:Triterpenes / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics* / Q000494:pharmacology; D000097669:Dammaranes
chemical_list: D014315:Triterpenes; C517965:25-methoxydammarane-3,12,20-triol; D000097669:Dammaranes