LC-MS/MS法测定人血浆中甲磺酸雷沙吉兰的浓度及其体内药动学研究

Determination of rasagiline mesylate in human plasma by LC-MS/MS and its pharmacokinetics study

目的：建立人血浆中甲磺酸雷沙吉兰（ rasagiline mesy-late，PAI）的液相色谱－串联质谱（ LC-MS／MS）测定方法，并应用于研究其在中国健康人体内的药动学特征。方法以氯吡格雷为内标，血浆样品经液－液萃取后，通过三重四级杆串联质谱仪，以选择性正离子反应监测进行测定，检测离子对为m／z172.3→117.1（雷沙吉兰），m／z322.3→184.0（氯吡格雷）。甲磺酸雷沙吉兰线性范围为0.1047～20.93μg· L－1，定量限为0.1047μg · L－1，方法学各项指标均符合要求。应用此法研究24名（男女各半）中国健康志愿者口服甲磺酸雷沙吉兰片的药动学特点及进行了统计学比较。结果结果显示0.5、1.0及2.0 mg 3个剂量组（ n＝12）甲磺酸雷沙吉兰的吸收呈线性动力学特征；中剂量多次给药后，无蓄积现象；性别对雷沙吉兰主要药动学参数的影响差异也无统计学意义；但高脂饮食对雷沙吉兰的药物峰浓度有明显影响，但对吸收程度无明显影响。结论建立的LC-MS／MS测定法专属、灵敏，满足甲磺酸雷沙吉兰片的人体药动学研究。

Aim To develop LC-MS/MS method to de-termine rasagiline mesylate in human plasma and its application in a pharmacokinetics study .Methods Plasma samples were extracted using liquid-liquid ex-traction with clopidogrel as internal standard .The con-tent of rasagiline mesylate in human plasma was detec-ted by selectivelypositive ion reaction monitoring on a triple quadrupoles tandem mass spectrometer .The de-tected ions were m/z 172.3→117.1 （ rasagiline ） , m/z 322.3 →184.0 （ clopidogrel ） .The linear calibration curve was obtained in the concentration range of 0.1047~20.93 μg · L-1 .The lower limit of quantifi-cation was 0.1047 μg · L-1 .Indicators of the method validation were in line with requirements .The method was used to determine the concentration of rasagiline in human plasma after oral administration of rasagiline mesylate capsule to 24 healthy Chinese volunteers （ with＆nbsp;half males and females ） and the results were compared statistically .Results The single oral dose of 0.5 ,1.0 and 2.0 mg presented linear pharmacokinetics in the health volunteers .No accumulation was observed with multiple doses .Meanwhile , no significant difference was identified between the gender groups . High fat postprandial has obvious effects on the peak serum con-centration of rasagiline , but there was no effect on the absorption amount and cumulative excretion .Conclu-sion The LC-MS/MS method is specific and sensi-tive, and can be successfully applied to the pharmaco-kinetic study of Rasagiline mesylate tablets in healthy Chinese volunteers .