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抗肿瘤候选药物Gedatolisib在体外血浆和人工胃/肠液中的稳定
性研究及其降解产物分析
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武婷婷 ,张 宇 ,杜 瑶 ,陈 瑞 ,王丽丽 ,彭鸿曼 ,汤 磊 ,王 颖 ,张吉泉 (1.贵州医科大学药学院,
贵阳 550025;2. 贵州医科大学贵州省化学合成药物研发利用工程技术研究中心,贵阳 550025;3. 贵州医科
大学医药卫生管理学院,贵阳 550025;4.贵阳市妇幼保健院临床教学科,贵阳 550003)
中图分类号 R969.1;R979.1 文献标志码 A 文章编号 1001-0408(2020)12-1452-07
DOI 10.6039/j.issn.1001-0408.2020.12.09
摘 要 目的:考察抗肿瘤候选药物 Gedatolisib 在体外血浆和人工胃/肠液中的稳定性,并分析其在体外血浆中可能的降解产
物。方法:采用高效液相色谱法,以吲哚美辛为内标,分别检测Gedatolisib在SD大鼠(雄性)血浆中孵育0、0.5、1.0、1.5、2.0、3.0 h
和在空白人工胃液(pH 1.3,不含酶)、空白人工肠液(pH 6.8,不含酶)、人工胃液(pH 1.3,含胃蛋白酶)、人工肠液(pH 6.8,含胰蛋白
酶)中孵育 0、0.5、1.0、2.0、3.0、4.0、6.0 h 的含量变化,计算其剩余百分比;利用超高效液相色谱-四极杆-飞行时间质谱
(UPLC-Q-TOF/MS)技术分析空白血浆和血浆孵育样品的总离子流图,比较差异峰并通过MS图推测降解产物。结果:Gedatolisib
在大鼠血浆中孵育 2.0 h 时的剩余百分比约为 63%,继续孵育无明显变化;在空白人工肠液中孵育不同时间的剩余百分比均在
(99.18±2.15)%~(103.20±3.41)%范围内;在人工肠液中孵育2.0 h的剩余百分比降至(88.76±1.53)%,在空白人工胃液中孵育
2.0 h的剩余百分比降至(85.63±1.55)%,继续孵育均无明显变化;在人工胃液中孵育的剩余百分比从0 h的(94.94±3.52)%降至
6.0 h的(16.19±1.17)%。UPLC-Q-TOF/MS的总离子流图显示,血浆孵育样品与空白血浆的差异峰出现在正离子模式扫描下的
+
6.42 min处,该峰扫描通道可见m/z 616.335 1、632.327 7、630.317 0、602.278 6[M+H] 的分子离子峰,推测Gedatolisib在大鼠血浆中
可能生成 1-(4-(3-(4,6-双吗啉-1,3,5-三嗪-2-基)苯基)脲基)苯甲酰基)-N,N-二甲基哌啶-4-氧化胺、1-(4-(4-(二甲基氨基)哌
啶-1-羰基)苯基)-3-(4-(4-吗啉-6-(3-氧代吗啉)-1,3,5-三嗪-2-基)苯基)脲和1-(4-(3-(4-(4,6-双吗啉-1,3,5-三嗪-2-基)苯基)脲
基)苯甲酰基)-N-甲基哌啶等3个降解产物。结论:Gedatolisib在大鼠血浆中不稳定,可能发生末端氮原子氧化、吗啉环氧化和末
端氮脱甲基化等反应;在人工肠液和空白人工胃/肠液中稳定性良好,在胃蛋白酶存在下发生明显降解。
关键词 抗肿瘤候选药物;Gedatolisib;体外血浆;人工胃液;人工肠液;稳定性;降解产物
Study on the Stability of Antitumor Candidate Gedatolisib in Plasma in vitro and Simulated Gastric/
intestinal Fluid and Its Catabolites Analysis
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WU Tingting ,ZHANG Yu ,DU Yao ,CHEN Rui ,WANG Lili ,PENG Hongman ,TANG Lei ,WANG Ying ,
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ZHANG Jiquan (1. College of Pharmacy,Guizhou Medical University,Guiyang 550025,China;2. Guizhou
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Provincial Engineering Technology Research Center for Chemical Drug R&D,Guizhou Medical University,
Guiyang 550025,China;3. School of Medicine and Health Management,Guizhou Medical University,Guiyang
550025,China;4. Dept. of Clinical Teaching,Guiyang Maternal and Child Health Hospital,Guiyang 550003,
China)
ABSTRACT OBJECTIVE:To investigate the stabilities of antitumor candidate Gedatolisib in plasma in vitro and simulated
gastric/intestinal fluids,and to analyze the possible catabolites in plasma. METHODS: HPLC method was adopted. Using
indometacin as internal standard,the contents of Gedatolisib incubated in plasma of SD rats(male)for 0,0.5,1.0,1.5,2.0,3.0 h
and blank simulated gastric fluid(pH 1.3,no enzyme),blank simulated intestinal fluid(pH 6.8,no enzyme),simulated gastric
fluid(pH 1.3,containing pepsin)and simulated intestinal fluid(pH 6.8,containing trypsin)for 0,0.5,1.0,2.0,3.0,4.0,6.0 h
were determined. The remaining percentage of Gedatolisib was calculated. UPLC-Q-TOF/MS was used to analyze the TIC of blank
plasma and incubated samples. The differential peaks were
Δ 基金项目:国家自然科学基金资助项目(No.81703356);贵州省
compared, and catabolites were inferred by MS
科技计划项目(No.黔科合〔2016〕支撑 2819,No.黔科合基础〔2020〕
1Z073);贵州省卫生健康委科学技术基金项目(No.gzwjkj2019-1- chromatograms. RESULTS: The remaining percentage in
plasma of rats for 2.0 h was about 63% ,and there was no
178);贵 州 省 大 学 生 创 新 创 业 训 练 计 划 项 目(No.2018520343,
No.2018520355,No.20195200137,No.20195200128);贵阳市科技计划 significant change after continued incubation. The remaining
项目(No.筑科合同〔2017〕30-28号) percentage of Gedatolisib incubated in blank simulated
*硕士研究生。研究方向:药物化学。E-mail:308755338@qq.com intestinal fluid for different time ranged(99.18 ± 2.15)% -
# 通信作者:副教授。研究方向:药物化学。E-mail:619624244@qq. (103.20 ± 3.41)% . The remaining percentage in simulated
com intestinal fluids for 2.0 h ranged (88.76 ± 1.53)% . The
·1452 · China Pharmacy 2020 Vol. 31 No. 12 中国药房 2020年第31卷第12期