吉林大学学报(医学版) ›› 2020, Vol. 46 ›› Issue (6): 1162-1168.doi: 10.13481/j.1671-587x.20200609

• 基础研究 • 上一篇    下一篇

黄芪多糖对人肺癌顺铂耐药株A549/DDP细胞耐药性的影响及其机制

柳叶1,陈龙云2()   

  1. 1.湖北中医药大学检验学院临床微生物学教研室, 湖北 武汉 430065
    2.湖北中医药大学基础医学院 生物化学教研室, 湖北 武汉 430065
  • 收稿日期:2020-05-06 出版日期:2020-11-28 发布日期:2022-08-24
  • 通讯作者: 陈龙云 E-mail:bcly988@hbtcm.edu.cn
  • 作者简介:柳 叶(1982-),男,湖北省荆门人,讲师,理学博士,主要从事医学微生物学和中医基础理论方面的研究。
  • 基金资助:
    国家自然科学基金青年基金资助课题(31700152);湖北高校省级教学研究项目资助课题(2017353)

Effect of astragalus polysaccharide on cisplatin resistance of human lung cancer A549/DDP cells and its mechanism

Ye LIU1,Longyun CHEN2()   

  1. 1.Department of Clinical Microbiology,School of Laboratory Medicine,Hubei University of Chinese Medicine,Wuhan 430065,China
    2.Department of Biochemistry,School of Basic Medical Sciences,Hubei University of Chinese Medicine,Wuhan 430065,China
  • Received:2020-05-06 Online:2020-11-28 Published:2022-08-24
  • Contact: Longyun CHEN E-mail:bcly988@hbtcm.edu.cn

摘要: 目的

探讨黄芪多糖(APS)对人肺癌顺铂(DDP)耐药A549/DDP细胞耐药性的影响,并阐明其可能的作用机制。

方法

将对数生长期A549/DDP细胞分为对照组(不经药物干预)、APS组(给予25、50、100、200和400 mg·L-1 APS)、DDP组(给予2、4、8、16和32 mg·L-1 DDP)及APS+DDP组(给予100 mg·L-1 APS和2、4、8、16和32 mg·L-1 DDP),药物处理A549/DDP细胞24 h,采用CCK-8法检测各组A549/DDP细胞增殖抑制率,并计算半数抑制浓度(IC50)。将A549/DDP细胞分为对照组(不经药物干预)、APS组(给予100 mg·L-1 APS)、DDP组(给予11.46 mg·L-1 DDP)及APS+DDP组(给予100 mg·L-1 APS和11.46 mg·L-1 DDP),药物处理细胞24 h,采用Transwell小室法检测各组A549/DDP细胞迁移情况,流式细胞术检测各组A549/DDP细胞凋亡率和线粒体膜电位,Western blotting法检测各组A549/DDP细胞中B淋巴细胞瘤 2(Bcl-2)、Bcl-2相关X蛋白(Bax)、P糖蛋白(P-gp)、磷脂酰肌醇3激酶(PI3K)、磷酸化磷脂酰肌醇3激酶(p-PI3K)、蛋白激酶B(AKT)和磷酸化蛋白激酶B(p-AKT)蛋白表达水平。

结果

CCK-8法检测,与DDP组比较,APS+DDP组的A549/DDP细胞IC50降低。Transwell小室法检测,与对照组比较,APS组A549/DDP细胞迁移能力无明显变化;与DDP组比较,APS+DDP 组A549/DDP细胞迁移数降低。流式细胞术检测,与对照组比较,APS组A549/DDP细胞凋亡率和线粒体膜电位差异无统计学意义(P>0.05),DDP组A549/DDP细胞凋亡率升高,线粒体膜电位降低(P<0.05);与DDP组比较,APS+DDP组A549/DDP细胞凋亡率升高,线粒体膜电位降低(P<0.05)。Western blotting法检测,与对照组比较,APS组A549/DDP细胞中Bcl-2和P-gp蛋白表达水平降低(P<0.05),p-PI3K/PI3K和p-AKT/AKT比值降低(P<0.05),Bax蛋白表达水平差异无统计学意义(P>0.05);与APS组比较,DDP组A549/DDP细胞中Bcl-2和P-gp蛋白表达水平降低(P<0.05),p-PI3K/PI3K和p-AKT/AKT比值降低P<0.05),Bax蛋白表达水平升高(P<0.05);与DDP组比较,APS+DDP组A549/DDP细胞中Bcl-2和P-gp蛋白表达水平降低(P<0.05),p-PI3K/PI3K和p-AKT/AKT比值降低(P<0.05),Bax蛋白表达水平升高(P<0.05)。

结论

APS能逆转A549/DDP细胞耐药性,其机制可能与其阻断PI3K/AKT信号通路和诱导线粒体损伤有关联。

关键词: 黄芪多糖, A549/DDP细胞, 耐药性, 磷脂酰肌醇3激酶, 蛋白激酶B

Abstract: Objective

To explore the effect of astragalus polysaccharide (APS) on the cisplatin(DDP) resistance of human lung cancer A549/DDP cells, and to clarify its possible mechanism.

Methods

The A549/DDP cells at logarithmic growth phase were divided into control group (without drug intervention), APS groups ( given 25, 50, 100, 200, and 400 mg·L-1 APS), DDP groups (given 2, 4, 8, 16, and 32 mg·L-1 DDP) and APS+DDP groups (given 100 mg·L-1 APS and 2, 4, 8, 16, 32 mg·L-1 DDP). After the cells were treated for 24 h, the inhibitory rates of proliferation of the A549/DDP cells in various groups were detected by CCK-8 method and the half inhibitory concentration (IC50) was caluculated. The A549/DDP cells were divided into control group (without drug intervention), APS group (given 100 mg·L-1 APS), DDP group (given 11.46 mg·L-1 DDP) and APS+DDP group (given 100 mg·L-1 APS and 11.46 mg·L-1 DDP), the cells in various groups were treated with drugs for 24 h. The migration of A549/DDP cells in various groups was detected by Transwell chamber assay; the apoptotic rates and mitochondrial membrane potentials of the A549/DDP cells in various groups were detected by flow cytometry, and the level expression levels of B-cell lymphoma 2 (Bcl-2), Bcl-2-related X protein (Bax),P-glycoprotein (P-gp),phosphatidylinositol-3 kinase (PI3K), phosphorylated phosphatidylinositol-3 kinase (p-PI3K), protein kinase B (AKT) and phosphorylated protein kinase B (p-AKT) proteins in the A549 / DDP cells in various groups were detected by Western blotting method.

Results

The CCK-8 results showed that compared with DDP group, the IC50 of DDP in APS+DDP group was decreased. The Transwell chamber assay results showed that compared with control group, the migration number of A549 / DDP cells in APS group was not significantly changed; compared with DDP group, the migration number of A549 / DDP cells in APS+ DDP group was decreased.The results of flow cytometry showed that compared with control group, the apoptotic rate and mitochondrial membrane potential of A549 / DDP cells in APS group had no significant changes (P>0.05), and the apoptotic rate and mitochondrial membrane potential of the A549/DDP cells in DDP group were significantly increased (P<0.05); compared with DDP group, the apoptotic rate and mitochondrial membrane potential of A549 / DDP cells in APS+DDP group were significantly increased (P<0.05);the Western blotting results showed that compared with control group, the expression levels of Bcl-2 and P-gp proteins in the A549/DDP cells in APS group was significantly decreased (P<0.05), the ratios of p-PI3K/PI3K and p-AKT/AKT were decreased(P<0.05), and there was no significant difference in the expression level of Bax protein (P>0.05);compared with APS group, the expression levels of Bcl-2 and P-gp proteins in the A549 / DDP cells in DDP group were significantly decreased (P<0.05),the ratios of p-PI3K/PI3K and p-AKT/AKT were decreased(P<0.05), and the expression level of Bax protein was significantly increased (P<0.05);compared with DDP group, the expression levels of Bcl-2 and P-gp proteins in the A549 / DDP cells in DDP+APS group were significantly decreased (P<0.05), the ratios of p-PI3K/PI3K and p-AKT/AKT were decreased(P<0.05),and the expression level of Bax protein was significantly increased (P<0.05).

Conclusion

APS can reverse the drug resistance of A549/DDP cells,and its mechanism may be related to blocking the PI3K/AKT signal pathway and inducing the mitochondrial damage.

Key words: astragalus polysaccharide, A549/DDP cells, drug resistance, phosphatidylinositol-3 kinase, protein kinase B

中图分类号: 

  • R273