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雷公藤甲素联合吉非替尼对EGFR突变NSCLC细胞的协同效应
分析
2 #
张 艺 ,郭 芬 (1.咸宁市中心医院/湖北科技学院附属第一医院呼吸与危重症医学科,湖北 咸宁 437100;
1*
2.湖北科技学院临床医学院医学实验实训中心,湖北 咸宁 437100)
中图分类号 R965 文献标志码 A 文章编号 1001-0408(2023)18-2219-07
DOI 10.6039/j.issn.1001-0408.2023.18.09
摘 要 目的 探讨雷公藤甲素(TPL)联合表皮生长因子受体酪氨酸激酶抑制剂(EGFR-TKI)吉非替尼对EGFR突变非小细胞肺
癌(NSCLC)细胞的协同效应及潜在机制。方法 体外培养人 NSCLC 细胞系 H1975(EGFR T790M/L858R 突变的耐药细胞系)和
H1299(EGFR野生型的非耐药细胞系),采用MTT法检测细胞存活率并通过联合用药指数(CI)评价TPL和吉非替尼的联用效应。
将H1975细胞分为空白组,低、高浓度TPL组(5、15 nmol/L),吉非替尼组(2 μmol/L),低浓度TPL+吉非替尼组、高浓度TPL+吉非
替尼组(5 nmol/L TPL+2 μmol/L吉非替尼、15 nmol/L TPL+2 μmol/L吉非替尼),采用流式细胞术检测其凋亡及周期分布情况;利
用分子对接技术预测TPL与EGFR的结合能力,并采用流式细胞术检测细胞中磷脂酰肌醇3-激酶/蛋白激酶B/哺乳动物雷帕霉素
靶蛋白(PI3K/Akt/mTOR)通路及自噬相关蛋白[微管相关蛋白 1 轻链 3α(MAP1LC3A)、MAP1LC3B]的表达情况。结果 TPL 对
H1975和H1299细胞的增殖均有一定的抑制作用,且有浓度、时间依赖趋势;5或15 nmol/L TPL联合吉非替尼作用48 h对H1975
细胞的增殖均有协同抑制效应(CI<1),而对H1299细胞则无协同作用(CI>1)。与空白组比较,各药物组的细胞凋亡率和G0/G1
期细胞的比例均显著升高,S期、G2/M期(个别TPL组除外)细胞的比例均显著降低,且联用组效果更优(P<0.05)。分子对接结果
显示,TPL的羟基可与EGFR T790M/L858R突变编码产物的Thr854残基形成氢键。与空白组比较,各药物组细胞中通路相关蛋
白的表达均显著下调,自噬相关蛋白的表达均显著上调,且联用组效果更优(P<0.05)。结论 TPL 联合吉非替尼可协同抑制
EGFR突变NSCLC细胞的增殖活性,其作用机制可能与下调PI3K/Akt/mTOR通路和诱导细胞自噬有关。
关键词 雷公藤甲素;吉非替尼;表皮生长因子受体;酪氨酸激酶抑制剂;非小细胞肺癌;磷脂酰肌醇3-激酶/蛋白激酶B/哺乳动物
雷帕霉素靶蛋白通路;自噬;耐药
Analysis of the synergistic effect of triptolide combined with gefitinib on EGFR-mutant NSCLC cells
2
1
ZHANG Yi ,GUO Fen(1. Dept. of Respiratory and Critical Care Medicine, Xianning Central Hospital/the First
Affiliated Hospital of Hubei University of Science and Technology, Hubei Xianning 437100, China; 2. Medical
Experiment Center, Clinical Medical College of Hubei University of Science and Technology, Hubei Xianning
437100, China)
ABSTRACT OBJECTIVE To investigate the synergistic effect of triptolide (TPL) combined with epidermal growth factor
receptor tyrosine kinase inhibitor (EGFR-TKI) gefitinib on EGFR-mutated non-small cell lung cancer (NSCLC) cells and its
potential mechanism. METHODS Human NSCLC cell lines H1975 (EGFR T790M/L858R mutated drug-resistant cell lines) and
H1299 (EGFR wild-type non-drug-resistant cell lines) were cultured in vitro. MTT method was used to detect cell activity, and the
effect of combined medication was evaluated by the combination index (CI). The H1975 cells were divided into blank group, low-
concentration and high-concentration groups of TPL (5 nmol/L or 15 nmol/L), gefitinib group (2 μmol/L), low-concentration and
high-concentration groups of TPL+gefitinib (5 nmol/L TPL+2 μmol/L gefitinib, 15 nmol/L TPL+2 μmol/L gefitinib). Flow
cytometry was used to detect the apoptosis of H1975 cells and the distribution of the cell cycle. Molecular docking studies were
used to predict the binding ability of TPL to EGFR. The expressions of phosphatidylinositol 3 kinase (PI3K)/protein kinase B
(Akt)/mammalian target of rapamycin (mTOR) pathway and autophagy-related proteins [microtubule-associated protein 1 light
chain 3α (MAP1LC3A), MAP1LC3B] in H1975 cells were
*第一作者 副主任医师。研究方向:慢性阻塞性肺疾病、哮喘、 detected by flow cytometry. RESULTS TPL had a strong
肺炎、肺癌、间质性肺病的基础与临床。E-mail:bichez955393@163.
inhibitory effect on the proliferation of H1975 and H1299 cells
com
# 通信作者 主任医师。研究方向:肿瘤内科基础与临床。E- in a time-dependent and dose-dependent manner. Forty-eight
mail:87146788@qq.com hours treatment of 5 or 15 nmol/L TPL combined with
中国药房 2023年第34卷第18期 China Pharmacy 2023 Vol. 34 No. 18 · 2219 ·