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- W2077570708 abstract "The pharmacokinetics of clausenamide (CLA) enantiomers and their metabolites were investigated in Wistar rat. After intravenous and oral administration at a dose of 80 and 160 mg/kg each enantiomer, plasma concentrations of (-)- or (+)-CLA and its major metabolites were simultaneously determined by reverse-phase HPLC with UV detection. Notably, stereoselective differences in pharmacokinetics were found. The mean plasma levels of (+)-CLA were higher at almost all time points than those of (-)-CLA. (+)-CLA also exhibited greater t(max), C(max), t(1/2beta), AUC(0-12h), and AUC(0--> infinity) and smaller CL (or CL/F) and V(d) (or V(d)/F), than its antipode. The (+)/(-) isomer ratios for t(1/2beta), t(max), AUC(0-12 h), and AUC(0--> infinity), which ranged from 1.26 to 2.08. The ratio for CL (or CL/F) was about 0.5, and there were significant differences in these values between CLA enantiomers (P < 0.05), implying that the absorption, distribution, and elimination of (-)-CLA were more rapid than those of (+)-CLA. Similar findings for (-)-7-OH-CLA, the major metabolite of (-)-CLA, and (+)-4-OH-CLA, the major metabolite of (+)-CLA, can be also seen in rat plasma. The contributing factors for the differences in stereoselective pharmacokinetics of CLA enantiomers appeared to be involved in their different plasma protein binding, first-pass metabolism and interaction with CYP enzymes, especially with their metabolizing enzyme CYP 3A isoforms." @default.
- W2077570708 created "2016-06-24" @default.
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- W2077570708 date "2003-01-01" @default.
- W2077570708 modified "2023-09-26" @default.
- W2077570708 title "Stereoselective pharmacokinetics of clausenamide enantiomers and their major metabolites after single intravenous and oral administration to rats" @default.
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- W2077570708 doi "https://doi.org/10.1002/chir.10278" @default.
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