高效液相色谱法同时测定霉酚酸酯及霉酚酸的血药浓度
2016-01-21
高效液相色谱法同时测定霉酚酸酯及霉酚酸的血药浓度
朱顺海1*赵梦芸2陈佳2许志良1**
(1.浙江中医药大学基础医学院 杭州 310053;2.中科(杭州)生命科学院有限公司 杭州 310052)
摘 要目的:建立高效液相色谱法同时测定人体血浆中霉酚酸酯及霉酚酸的药物浓度。方法:血浆样品经乙腈沉淀蛋白后直接进样,采用Zorbax SB-C18(4.6 mm×250 mm,5 mm)的色谱柱,流动相为0.3%的三乙胺水溶液(用磷酸调节pH 5.3)-乙腈(50∶50)。检测波长为215 nm,柱温 35 ℃,流速 1.0 ml/min。结果:本方法测定的线性范围为0.25 ~20 mg/ml,r(霉酚酸)=0.999 76,r(霉酚酸酯)=0.999 99。霉酚酸和霉酚酸酯的加标回收率分别为(87.38±2.97)%和(99.71±1.18)%,最低检出限分别为0.035 mg/ml和0.070 mg/ml(S/N=3)。结论:本方法简单,灵敏,重现性好,适合器官移植等患者霉酚酸及霉酚酸酯的血药浓度监测,以及霉酚酸酯的药代动力学研究。
关键词霉酚酸酯 霉酚酸 血药浓度 高效液相色谱法 药代动力学
Simultaneous determination of the concentration of mycophenolate mofetil and mycophenolic acid in plasma by HPLC
ZHU Shunhai1*, XU Zhiliang1, ZHAO Mengyun2, CHEN Jia2**
(1.Basic Medical College, Zhejiang Chinese Medical University, Hangzhou 310053, China; 2. Zhongke (Hangzhou) Life Sciences Co. Ltd., Hangzhou 310052, China)
ABSTRACTObjective: To establish an HPLC method for simultaneous determination of the concentrations of mycophenolate mofetil and mycophenolic acid in human plasma. Methods: The plasma sample was analyzed by HPLC on a Zorbax SB-C18column (4.6 mm×250 mm,5 mm) with 0.3% aqueous triethylamine - acetonitrile (50:50) as a mobile phase at the detection wavelength of 215 nm, column temperature of 35 ℃ and flow velocity of 1.0 ml/min after the proteins were precipitated out by acetonitrile. Results: The standard curve was linear over the range of 0.25 ~10 mg/ml with r(MPA)=0.999 76, r(MMF)=0.999 99. The recoveries of MPA and MMF were (87.38±2.97)% and(99.71±1.18)% and the limit of detection for MPA and MMF were 0.035 mg/ml and 0.070 mg/ml(S/N=3). Conclusion: This method is simple, sensitive, reproducible, and suitable for the monitoring of the concentrations of mycophenolic acid and mycophenolate mofetil in patients with organ transplantation and the pharmacokinetic study of mycophenolate mofetil.
KEY WORDSmycophenolate mofetil; mycophenolic acid; blood concentration; HPLC; pharmacokinetics
霉酚酸酯(又称麦考酚酸酯,mycophenolate mofetil,MMF),商品名为骁悉(Cellcept),是霉酚酸(Mycophenolic acid, MPA)的吗啉代乙酯。1995年5月霉酚酸酯获得美国食品药品管理局(FDA)认可,用于预防肾移植急性排斥反应,并在以后的应用中取得了较好效果。1998年10月该药成为美国正式批准上市的具有免疫抑制作用的药物[1]。作为免疫抑制剂,霉酚酸酯已广泛应用于预防肾脏等实体器官移植的急性排斥反应[2]。MMF在体内代谢为活性代谢物MPA而发挥作用,MPA主要通过非竞争性、可逆性抑制嘌呤从头合成途径的限速酶次黄嘌呤单核苷酸脱氢酶(IMPDH),强烈抑制T、B淋巴细胞增殖而发挥免疫抑制作用[3-4]。国内临床上应用常规剂量(1~2 g/d)获得理想效果,但由于MMF的个体间差异普遍存在,所以常规剂量可能会带来个体间疗效差异和不良反应的出现。……
