吉林大学学报(医学版) ›› 2024, Vol. 50 ›› Issue (1): 113-119.doi: 10.13481/j.1671-587X.20240114

• 基础研究 • 上一篇    

下调富含脯氨酸蛋白11表达对食管癌耐药细胞EC9706/DDP耐药性的影响及其机制

亢春彦1,张秀芝1,周慧聪2,陈洁1()   

  1. 1.河南医学高等专科学校病理学教研室,河南 郑州 451191
    2.郑州大学第二附属医院消化内科,河南 郑州 450000
  • 收稿日期:2023-03-13 出版日期:2024-01-28 发布日期:2024-01-31
  • 通讯作者: 陈洁 E-mail:chjchj77@163.com
  • 作者简介:亢春彦(1977-),女,河南省焦作市人,副教授,医学硕士,主要从事肿瘤早期诊断方面的研究。
  • 基金资助:
    河南省科技厅科技攻关项目(192102310103)

Effect of downregulating proline-rich protein 11 expression on drug resistance of esophageal cancer drug resistant cell EC9706/DDP and its mechanism

Chunyan KANG1,Xiuzhi ZHANG1,Huicong ZHOU2,Jie CHEN1()   

  1. 1.Department of Pathology,Henan Medical College,Zhengzhou 451191,China
    2.Department of Gastroenterology,Second Affiliated Hospital,Zhengzhou University,Zhengzhou 450000,China
  • Received:2023-03-13 Online:2024-01-28 Published:2024-01-31
  • Contact: Jie CHEN E-mail:chjchj77@163.com

摘要:

目的 探讨下调富含脯氨酸蛋白11(PRR11)表达对食管癌耐药细胞耐药性的影响,阐明其相关机制。 方法 采用顺铂(DDP)浓度递增间断刺激人食管癌EC9706细胞建立DDP耐药细胞株EC9706/DDP,MTT法检测EC9706/DDP细胞药敏性,实时荧光定量PCR(RT-qPCR)法和Western blotting法检测EC9706/DDP细胞及其亲本EC9706细胞中PRR11 mRNA和蛋白表达水平。将EC9706/DDP细胞分为对照组、sh-NC组(转染sh-NC)、sh-PRR11组(转染sh-PRR11)、sh-NC+DDP组(转染sh-NC后用4 mg?L-1 DDP处理)和sh-PRR11+DDP组(转染sh-PRR11后用4 mg?L-1 DDP处理),RT-qPCR法检测各组细胞中PRR11 mRNA表达水平,Western blotting 法检测各组细胞中PRR11、磷脂酰肌醇3-激酶(PI3K)p110α、蛋白激酶B(AKT)、磷酸化AKT(p-AKT)、P-糖蛋白(P-gp)和多药耐药相关蛋白1(MRP1)蛋白表达水平,流式细胞术检测各组细胞凋亡率。 结果 成功获得DDP耐药细胞株EC9706/DDP,耐药指数为7.23±0.86。与EC9706细胞比较,EC9706/DDP细胞中PRR11mRNA和蛋白表达水平升高(P<0.05)。分别与对照组和sh-NC组比较,sh-PRR11组细胞中PRR11 mRNA和蛋白表达水平降低(P<0.05),细胞的DDP半数抑制浓度(IC50)降低(P<0.05)。与sh-NC组比较,sh-NC+DDP组和sh-PRR11组细胞中PI3K p110α、p-AKT、P-gp和MRP1蛋白表达水平降低(P<0.05),细胞凋亡率升高(P<0.05);分别与sh-NC+DDP组和sh-PRR11组比较,sh-PRR11+DDP组细胞中PI3K p110α、p-AKT、P-gp和MRP1蛋白表达水平降低(P<0.05),细胞凋亡率升高(P<0.05)。 结论 下调EC9706/DDP耐药细胞中PRR11 基因的表达,可抑制耐药相关蛋白的表达,逆转对DDP耐药,并诱导细胞凋亡,其作用机制可能与抑制PI3K/AKT信号通路激活有关。

关键词: 富含脯氨酸蛋白11, 食管肿瘤, 顺铂, 耐药, 磷脂酰肌醇3-激酶/蛋白激酶B信号通路

Abstract:

Objective To discuss the effect of downregulating the proline-rich protein 11 (PRR11) expression on drug resistance of the esophageal cancer drug resistant cells, and to clarify the related mechanism. Methods The drug resistant cells EC9706/cisplatin(DDP) were established by incrementally stimulating the human esophageal cancer EC9706 cells with the increasing concentrations of DDP. The drug sensitivity of the EC9706/DDP cells was detected by MTT assay; the expression levels of PRR11 mRNA and protein in the EC9706/DDP cells and their parent EC9706 cells were detected by real-time fluorescence quantitative PCR (RT-qPCR) and Western blotting methods. The EC9706/DDP cells were divided into control group,sh-NC group (infected with sh-NC),sh-PRR11 group(infected with sh-PRR11), sh-NC+DDP group (infected with sh-NC and treated with 4 mg·L-1 DDP), and sh-PRR11+DDP group (infected with sh-PRR11 and treated with 4 mg·L-1 DDP). The expression levels of PRR11 mRNA in the cells in various groups were detected by RT-qPCR method; the expression levels of PRR11, phosphoinositide 3-kinase (PI3K) p110α, protein kinase B (AKT), phosphorylated AKT (p-AKT), P-glycoprotein (P-gp), and multidrug resistance-associated protein 1 (MRP1) proteins in the cells in various groups were detected by Western blotting method;the apoptotic rates of the cells in various groups were detected by flow cytometry. Results The DDP-resistant cell line EC9706/DDP was successfully obtained,and the drug resistance index was 7.23±0.86. Compared with the EC9706 cells, the expression levels of PRR11 mRNA and protein in the EC9706/DDP cells were increased (P<0.05). Compared with control and sh-NC groups, the expression levels of PRR11 mRNA and protein in the cells in sh-PRR11 group were decreased (P<0.05),and the 50% inhibitory concentration (IC50) of DDP was decreased (P<0.05).Compared with sh-NC group,the expression levels of PI3K p110α, p-AKT, P-gp, and MRP1 proteins in the cells in sh-NC+DDP and sh-PRR11 groups were decreased (P<0.05),and the apoptotic rate of the cells was increased (P<0.05). Compared with sh-NC+DDP group and sh-PRR11 group,the expression levels of PI3K p110α, p-AKT, P-gp, and MRP1 proteins in the cells in sh-PRR11+DDP group were increased(P<0.05),and the apoptotic rate of the cells was increased(P<0.05). Conclusion Downregulating the expression of PRR11 gene in the drug resistant EC9706/DDP cells can inhibit the expressions of drug resistance-related proteins, reverse the resistance to DDP, and induce the apoptosis; its mechanism may be related to the inhibition of activation of the PI3K/AKT signaling pathway.

Key words: Proline-rich protein 11, Esophageal neoplasm, Cisplatin, Drug resistance, Phosphoinositide 3-kinase/protein kinase B signaling pathway

中图分类号: 

  • R735.1