酶解法与LC-MS-MS相结合研究灯盏乙素在健康人体内的药代动力学

Pharmacokinetic study of scutellarin in healthy volunteers by enzymatic hydrolysis and LC-MS-MS analysis

目的：建立β-葡萄糖醛酸苷酶解法与LC-MS-MS法相结合测定人体血浆中灯盏乙素的苷元,研究健康男性单剂量口服灯盏花素分散片的药代动力学。方法血浆样品经β-葡萄糖醛酸苷酶水解,甲醇蛋白沉淀,色谱柱为Agilent ZOR BAX SB C18（2．1 mm×150 mm,5μm）,运用乙腈-甲醇-水洗脱,多反应监测（MRM）灯盏乙素苷元（[M - H]-,m/ z 285．0/136．8）和内标槲皮素（[ M - H]-, m/ z 301．1/120．8）。12名健康男性单剂量口服灯盏花素分散片120 mg 后,采用该方法测定血浆中灯盏乙素苷元,使用DAS 1.0软件处理数据,计算药代动力学参数。结果灯盏乙素苷元在4．01～513．38μg·L-1范围内线性良好,日内日间精密度小于7．22%,提取回收率大于84．23%。12名健康男性单剂量口服灯盏花素分散片120 mg 后,以灯盏乙素苷元为检测对象的主要药动学参数为：Cmax （μg·L^-1）：159．97±58．14； AUC（0-19）（μg·L^-1·h）：1151．37±279．80；AUC（0- ∞）（μg· L^-1·h）：1194．13±264．51；Tmax （h）：6．33±1．67；T1/2（h）：2．83±0．60。结论建立的酶解与LC-MS-MS 相结合分析方法准确灵敏,适用于灯盏乙素人体内的药代动力学研究。

Aim To establish a combined method ofβ-glucuronidase hydrolysis and LC-MS-MS analysis for the determination of scutellarein in human plasma, and investigate the pharmacokinetics of scutellarin prepara-tion in healthy male volunteers. Methods Plasma samples were prepared by enzymolysis with β-glucu-ronidase and protein precipitation with methanol. The analytes scutellarein and quercetin （ IS ） were separa-ted on an Agilent ZORBAX SB C18 column （ 2. 1 mm ＆#215; 150 mm, 5 μm） with the mobile phases consisting of acetonitrile, methanol and water. Multiple reaction monitoring （ MRM） on MS was used to monitor precur-sor to produce ion transitions of m/z 285. 0→136. 8 for scutellarein and m/z 301. 1→120. 8 for IS. After method validation, this method was applied to deter-mine the plasma concentration of scutellarein in 12 male volunteers following single oral administration of 120 mg scutellarin preparation. Drug And Statistic soft-ware （1. 0） was used to process data and the pharma-cokinetic parameters were calculated. Results The assay was validated with linear range of 4 . 01-513. 38μg · L-1 for scutellarein. The intra- and inter-batch precisions （ RSD%） were within 7. 22%. The absolute recoveries were more than 84. 23%. The pharmacoki-netic parameters after a single dose were as follows：Cmax （μg · L-1 ）： 159. 97 ± 58. 14; AUC（0-19） （μg · L-1·h）：1151. 37 ±279. 80; AUC（0-∞）（μg·L-1· h）：1194. 13 ± 264. 51; Tmax （ h）：6. 33 ± 1. 67; T1/2 （h）：2. 83 ± 0. 60. Conclusion The assay method is proved to be sensitive, accurate and convenient. It can be successfully applied to a pharmacokinetic study of scutellarin in healthy male volunteers.