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·药物与临床·
伊马替尼及其代谢物血浆蛋白结合率测定方法的建立及应用 Δ
王敦建 1,2* ,焦慧文 ,钱 依 ,徐江浩 ,徐 皓 ,孙鲁宁 1,2 #a ,王永庆 (1. 徐州医科大学药学院,江苏 徐州
2
3
1,2 #b
3
2
221004;2.南京医科大学第一附属医院临床药理研究室,南京 210029;3.南京医科大学第一附属医院普外科,
南京 210029)
中图分类号 R969.1 文献标志码 A 文章编号 1001-0408(2022)18-2256-05
DOI 10.6039/j.issn.1001-0408.2022.18.16
摘 要 目的 建立测定伊马替尼及其代谢物(N-去甲基伊马替尼)血浆蛋白结合率的方法,并应用于胃肠道间质瘤(GIST)患者。
方法 以伊马替尼-d8为内标,采用甲醇沉淀蛋白处理样品,以平衡透析法结合液相色谱-串联质谱法测定,并同法检测GIST患者
血浆中伊马替尼及其代谢物的游离浓度。结果 伊马替尼在120、4 000 ng/mL浓度下,与白蛋白、α1-酸性糖蛋白、球蛋白的血浆蛋
白结合率分别为(92.5±1.0)%和(91.7±0.4)%、(56.6±2.0)%和(62.6±2.6)%、(56.3±3.1)%和(68.0±8.6)%;N-去甲基伊马替尼
在 60、2 000 ng/mL 浓度下,上述结合率分别为(90.6±3.5)%和(91.3±1.5)%、(54.1±5.1)%和(63.7±1.3)%、(56.2±7.6)%和
(67.5±7.3)%。与低浓度伊马替尼(120 ng/mL)及其代谢物(60 ng/mL)比较,高浓度伊马替尼(4 000 ng/mL)及其代谢物(2 000 ng/mL)
与 α1-酸性糖蛋白、球蛋白的血浆蛋白结合率显著提高(P<0.05),但与白蛋白的血浆蛋白结合率比较,差异无统计学意义(P>
0.05)。空白血浆中,高浓度伊马替尼(4 000 ng/mL)及其代谢物(2 000 ng/mL)的血浆蛋白结合率显著低于低(120、60 ng/mL)、中
(750、375 ng/mL)浓度(P<0.01)。GIST患者血浆中,伊马替尼及其代谢物的平均血浆蛋白结合率分别为(99.0±0.3)%、(99.2±
0.3)%,伊马替尼及其代谢物的浓度与血浆蛋白结合率的相关系数分别为-0.298 5、-3.332 3(P均小于0.05)。结论 成功建立了
测定伊马替尼及其代谢物血浆蛋白结合率的方法;GIST患者伊马替尼及其代谢物的血浆蛋白结合率与药物浓度呈负相关。
关键词 伊马替尼;N-去甲基伊马替尼;平衡透析法;液相色谱-串联质谱技术;血浆蛋白结合率
Establishment and application of a method for the determination of plasma protein binding rate of
imatinib and its metabolite
2
WANG Dunjian ,JIAO Huiwen ,QIAN Yi ,XU Jianghao ,XU Hao ,SUN Luning ,WANG Yongqing (1.
3
1,2
1,2
2
3
1,2
School of Pharmacy,Xuzhou Medical University,Jiangsu Xuzhou 221004,China;2. Research Division of
Clinical Pharmacology,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029,China;3.
Dept. of General Surgery,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029,China)
ABSTRACT OBJECTIVE To establish a method for the determination of plasma protein binding rate of imatinib and its
metabolite(N-desmethyl imatinib)and apply it to patients with gastrointestinal stromal tumor(GIST).METHODS Using imatinib-
d8 as the internal standard,after being deproteinized methanol,the sample was determined by equilibrium dialysis combined with
liquid chromatography-tandem mass spectrometry. The free concentrations of imatinib and its metabolites in plasma of GIST patients
were detected by the same method. RESULTS The protein binding rates of imatinib with albumin,α1-acid glycoprotein and
globulin at 120 ng/mL and 4 000 ng/mL were(92.5±1.0)% and(91.7±0.4)%,(56.6±2.0)% and(62.6±2.6)%,(56.3±3.1)%
and (68.0±8.6)% ,respectively. The protein binding rates of N-desmethyl imatinib with albumin,α1-acid glycoprotein and
globulin at 60 ng/mL and 2 000 ng/mL were(90.6±3.5)% and(91.3±1.5)%,(54.1±5.1)% and(63.7±1.3)%,(56.2±7.6)%
and(67.5±7.3)%,respectively. Compared with the low concentration group of imatinib(120 ng/mL)and its metabolite(60 ng/mL),the
plasma protein binding rate of high concentration of imatinib (4 000 ng/mL) and its metabolite (2 000 ng/mL) with α1-acid
glycoprotein and globulin was significantly increased (P<
Δ 基金项目 国家自然科学基金资助项目(No.81503160);江苏省 0.05),but there was no signifi-cant difference with albumin
卫生健康发展研究中心 2021 年度开放课题(No.JSHD2021004);江苏 (P>0.05). In blank plasma, the protein binding rates of
省人民医院优秀中青年人才支持计划项目
imatinib (4 000 ng/mL) at high concentration and its meta-
*第一作者 硕士研究生。研究方向:临床药学。电话:025-
bolites(2 000 ng/mL)were significantly lower than those of
68136984。E-mail:wdj110394@163.com
low (120, 60 ng/mL) and medium (750, 375 ng/mL)
#a 通信作者 副主任药师,副教授,硕士生导师,博士。研究方向:
concentration (P<0.01). Average protein binding rates of
体 内 药 物 分 析 、临 床 药 理 学 。 电 话 :025-68136984。 E-mail:
sunluning0521@aliyun.com imatinib and its metabolite in plasma of GIST patients were
#b 通信作者 主任药师,教授,博士生导师,博士。研究方向:临床 (99.0±0.3)% and(99.2±0.3)%,respectively;the correlation
药学、临床药理学。电话:025-68136984。E-mail:wyqjsph@163.com coefficients between the concentrations of imatinib and its
·2256· China Pharmacy 2022 Vol. 33 No. 18 中国药房 2022年第33卷第18期