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作 者:肖亚楠[1] 孙建国[1] 万萍[1] 王广基[1]
机构地区:[1]中国药科大学江苏省药物代谢动力学重点实验室,南京210009
出 处:《中国药科大学学报》2014年第5期571-575,共5页Journal of China Pharmaceutical University
基 金:江苏省药代动力学重点实验室提升项目(No.BM2012012)~~
摘 要:采用手性色谱LC-MS/MS法同时检测左旋和右旋奥硝唑,比较研究左旋奥硝唑[(S)-ONZ]及磷酸左奥硝唑酯二钠[(S)-ONZ-P]在大鼠体内的药代动力学差异,并监测是否发生手性转化。结果表明,大鼠单次iv给予25,50,100 mg/kg(S)-ONZ及等物质的量(S)-ONZ-P后,(S)-ONZ-P在SD大鼠体内迅速转化为(S)-ONZ,平均转化时间介于1.57-3.86 min。两组大鼠血浆中(S)-ONZ的t1/2分别为2.04-2.31 h;2.02-2.51 h;AUC0-∞与剂量间呈良好的线性关系,呈线性动力学过程。(S)-ONZ,(S)-ONZ-P在大鼠体内药代动力学行为无显著差异,且二者均不转化生成(R)-ONZ。The aims of this study were to conduct the comparative evaluation of pharmacokinetic of (S)-ornidazole [ (S) -ONZ] and (S) -ornidazole phosphate disodium [ (S) ONZ-P] in rats, and to observe the potentialchiral transformation to (R) -ornidazole [ (R) -ONZ] using developed LC-MS/MS method. After single, intravenousadministration of 25, 50, 100 mg/kg (S) -ONZ and(S) -ONZ-P [ equal molarity to that of (S) -ONZ], it was foundthat there existed linearity between the calculated areas under the curve (AUC0 ) and dose. And eliminationhalf-time (t1/2) of (S) -ONZ was calculated to be 2.04-2.31 h and 2.02-2.51 h, respectively. After iv dosing of(S) -ONZ-P, (S) -ONZ-P quickly transferred into (S) -ONZ with the average transformation time of around 1.57 to3.86 min. No significant differences in pharmacokinetics between the two drugs were found in rats. There was no(R)-ONZ detected in the plasma using both (S)-ONZ and (S)-ONZ-P.
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