检验医学 ›› 2022, Vol. 37 ›› Issue (4): 342-348.DOI: 10.3969/j.issn.1673-8640.2022.04.008

• 新型肿瘤标志分子研究专题 • 上一篇    下一篇

MAPK/ERK信号通路在逆转乳腺癌内分泌治疗耐药中的作用

叶敬文1, 沈云岳2, 刘鷖雯1, 何怡青1, 杜艳1, 张国良1, 高锋2, 杨翠霞2()   

  1. 1.上海交通大学附属第六人民医院中心实验室,上海 200233
    2.上海交通大学附属第六人民医院检验科,上海 200233
  • 收稿日期:2022-01-09 修回日期:2022-03-04 出版日期:2022-04-30 发布日期:2022-06-07
  • 通讯作者: 杨翠霞
  • 作者简介:杨翠霞,E-mail: dr.steven@163.com
    叶敬文,男,1996年生,硕士,主要从事肿瘤耐药机制研究;
    沈云岳,男,1980年生,学士,主管技师,主要从事临床检验工作。第一联系人:

    叶敬文与沈云岳对本研究具有同等贡献,并列为第一作者。

  • 基金资助:
    国家自然科学基金资助项目(81974445)

Role of MAPK/ERK signaling pathway in reversing endocrine resistance of breast cancer

YE Jingwen1, SHEN Yunyue2, LIU Yiwen1, HE Yiqing1, DU Yan1, ZHANG Guoliang1, GAO Feng2, YANG Cuixia2()   

  1. 1. Central Laboratory,Shanghai Jiao Tong University Affiliated Sixth People's Hospital,Shanghai 200233,China
    2. Department of Clinical Laboratory,Shanghai Jiao Tong University Affiliated Sixth People's Hospital,Shanghai 200233,China
  • Received:2022-01-09 Revised:2022-03-04 Online:2022-04-30 Published:2022-06-07
  • Contact: YANG Cuixia

摘要:

目的 探讨丝裂原活化蛋白激酶(MAPK)/细胞外调节蛋白激酶(ERK)信号通路在逆转乳腺癌内分泌治疗耐药中的作用。方法 采用人乳腺癌细胞系MCF-7和T47D分别建立他莫昔芬治疗耐药细胞株MCF-7/TAMR和T47D/TAMR。分析MCF-7细胞与MCF-7/TAMR细胞、T47D细胞与T47D/TAMR细胞增殖能力和MAPK/ERK信号通路分子表达情况的差异。分析丝裂原活化蛋白激酶激酶(MEK)抑制剂U0126抑制MAPK/ERK信号通路后,对MCF-7/TAMR和T47D/TAMR细胞增殖的抑制作用、细胞周期分布以及转录因子表达的影响。结果 与MCF-7细胞和T47D细胞比较,MCF-7/TAMR细胞和T47D/TAMR细胞的增殖速度显著加快(P<0.05),克隆形成能力显著增强(P<0.000 1),MAPK/ERK信号通路分子[ERK、磷酸化细胞外调节蛋白激酶(pERK)和c-MYC]表达量显著增高。采用MEK抑制剂U0126抑制MAPK/ERK信号通路后,MCF-7/TAMR细胞和T47D/TAMR细胞的增殖速度显著减慢(P<0.000 1),细胞周期发生停滞,MAPK/ERK信号通路的转录因子类固醇受体共激活因子(SRC-1)、E26转录因子-2(ETS-2)和c-JUN基因的相对表达量明显降低(P<0.01)。结论 抑制MAPK/ERK通路可逆转乳腺癌细胞的内分泌治疗耐药,或可为制定内分泌治疗耐药乳腺癌患者的治疗方案提供新的思路。

关键词: 丝裂原活化蛋白激酶/细胞外调节蛋白激酶信号通路, 转录因子, 内分泌治疗耐药, 乳腺癌

Abstract:

Objective To investigate the role of mitogen-activated protein kinase (MAPK)/extracellular regulated protein kinase (ERK) signaling pathway in reversing endocrine resistance of breast cancer. Methods Tamoxifen-resistant breast cancer cell lines,MCF-7/TAMR and T47D/TAMR,were established by human breast cancer cell lines,MCF-7 and T47D. The differences of cell proliferation and the expression of related MAPK/ERK signaling pathway molecules between MCF-7 and MCF-7/TAMR,T47D and T47D/TAMR were investigated. The suppressive effect of mitogen-activated protein kinase(MEK) inhibitor U0126 on MAPK/ERK signaling pathway in MCF-7/TAMR and T47D/TAMR was observed through the analysis of cell proliferation,cell cycle and transfactor expression. Results Compared with naïve MCF-7 or T47D cells,the proliferation and colony formation were increased (P<0.05,P<0.000 1),and the expression of related MAPK/ERK signaling pathway molecules [phosphorylated extracellular regulated protein kinase(pERK),ERK and c-MYC] was strongly increased. Suppressing MAPK/ERK signaling pathway by MEK inhibitor U0126,the growth of MCF7/TAMR or T47D/TAMR was decreased (P<0.000 1),and cell cycle was arrested. The relative gene expression of transcription factors,steroid receptor coactivator-1(SRC-1),E26 oncogene homolog-2(ETS-2) and c-JUN,and the expressions of their proteins were decreased by MEK inhibitor U0126(P<0.01). Conclusions The inhibition of MAPK/ERK signaling pathway could reverse the endocrine resistance of breast cancer cells,which can provide a reference for the treatment of patients with endocrine resistant breast cancer.

Key words: Mitogen-activated protein kinase/extracellular regulated protein kinase signaling pathway, Transcription factor, Endocrine resistance, Breast cancer

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