衍生化LC-MS测定人血浆中消旋卡多曲活性代谢物浓度及生物等效性  

Determination of Racecadotril's Active Metabolite by a New Derivative LC-MS Method and Their Bioequivalence in Healthy Chinese Volunteers

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作  者:俞佳[1] 马珂[2] 袁京群[3] 祁金文[1] 郑水莲[1] 毛小红[1] 

机构地区:[1]浙江省人民医院药学部,杭州310014 [2]浙江大学医学院附属邵逸夫医院药剂科,杭州310016 [3]浙江大学分析测试中心,杭州310029

出  处:《中国现代应用药学》2015年第3期323-330,共8页Chinese Journal of Modern Applied Pharmacy

摘  要:目的 建立一种衍生化LC-MS检测人血浆中消旋卡多曲活性代谢物thiorphan(TP)浓度,同时评价消旋卡多曲2种规格散剂(10 mg.袋1和30 mg.袋1)和国产颗粒剂在健康人体内的药动学及生物等效性。方法 采用3制剂3周期二重3×3拉丁方设计,18名健康男性志愿者交叉单剂量口服受试制剂2种规格消旋卡多曲散(10 mg.袋1和30 mg.袋1)和参比制剂消旋卡多曲颗粒剂各300 mg后,采用衍生化LC-MS测定不同时间血浆中活性代谢物TP浓度,用DAS药动学程序进行药动学参数的计算及生物等效性评价。血浆样品中加入p-BPB衍生化试剂,得到稳定的TP衍生化产物,经乙酸乙酯萃取后,选替米沙坦作内标。色谱柱为Zorbax SB-C18(150 mm×2.1 mm,5μm);流动相为5 mmol.L 1甲酸铵(甲酸调节pH至3.0)-乙腈(45︰55);流速为0.2 mL.min 1;采用ESI+SRM方式监测;TP衍生化产物m/z 452.10[M+H]+,内标替米沙坦m/z 515.30[M+H]+。结果 TP线性范围为6.28~1 256 ng.mL 1,最低检测浓度为6.28 ng.mL 1,提取回收率在77.5%~80.4%,日内、日间精密度RSD〈15%。受试制剂消旋卡多曲散(10 mg.袋1),消旋卡多曲散(30 mg.袋1)和参比制剂消旋卡多曲颗粒的主要药动学参数:Tmax分别为(1.8±1.2),(1.9±1.3)和(0.7±0.2)h,t1/2分别为(1.4±0.4),(1.2±0.7)和(1.1±0.8)h,Cmax分别为(802.0±356.5),(804.2±459.8)和(845.6±285.8)ng.mL 1,AUC0 8分别为(1 617.0±532.6),(1 628.9±672.1)和(1 621.0±532.2)ng.h.mL 1,AUC0∞分别为(1690.8±567.2),(1673.8±681.7)和(1 649.4±561.4)ng.h.mL 1。2种受试制剂的相对生物利用度分别为99.8%和100.5%。结论 本方法灵敏,有效,可准确检测人体血浆中TP的浓度。2种受试制剂和参比制剂具有生物等效性。OBJECTIVE To establish a LC/MS test method for determining the concentration of thiorphan(TP,the active metabolite of racecadotril) in thehuman plasma,the pharmacokinetics and bioequivalence of two racecadotril pulvis(10mg,30mg) and racecadotril granule(10mg) inhealthyhuman body.METHODS A single oral dose 300mg of three preparations was randomly given to 18healthy volunteers in a three cycle duplex 3×3 latin square crossover design.The concentration of TP in plasma,which was an active metabolite of racecadotril,was determined by LC-MS at different time.The pharmacokinetics parameters were calculated and the bioequivalence of three formulations were evaluated by DAS program.The p-BPB was added to the plasma as a derivative agent to achieve a stable TP-derivative.The TP-derivative was then extracted from the plasma using ethyl acetate.The method used telmisartan as internal standard material.In the test method,Zorbax SB-C18(150mm×2.1mm,5μm) was used as chromatogram column,5mmol·L-1 ammonium formate(adjust pH to 3.0 with formic acid)-acetonitrile(45∶ 55) as mobile phase,the flow rate 0.2 m L·min-1,ESI+SRM as detector.RESULTS The analytical method validation of TP was as follows: linear range 6.28-1 256 ng·m L-1,detection limit 6.28 ng·m L-1,extraction rate 77.5%-80.4%,precision of within and between day(RSD) both 15%.The main pharmacokinetic parameters of racecadotril pulvis(10mg),racecadotril pulvis(30mg) and reference granules were as follows: Tmax(1.8±1.2),(1.9±1.3) and(0.7±0.2)h,t1/2(1.4±0.4),(1.2±0.7) and(1.1±0.8)h,Cmax(802.0±356.5),(804.2±459.8) and(845.6±285.8)ng·m L-1,AUC0-8(1 617.0±532.6),(1 628.9±672.1) and(1 621.0± 532.2)ng·h·m L-1,AUC0-∞(1 690.8±567.2),(1 673.8±681.7) and(1 649.4±561.4)ng·h·m L-1,respectively.The relative bioavailability of 2 test pulvis versus reference granule were 99.8% and 100.5%,respectively.CONCLUSION The test method of determining the concentration o

关 键 词:消旋卡多曲 LC/MS 血药浓度 药动学 生物等效性 衍生化 

分 类 号:R917.101[医药卫生—药物分析学] R969.1[医药卫生—药学]

 

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