基础医学与临床 ›› 2015, Vol. 35 ›› Issue (3): 336-340.

• 研究论文 • 上一篇    下一篇

钙蛋白酶抑制EGF诱导雌激素受体阴性乳腺癌细胞体外增殖

安静1,朱筑霞2,王红梅2,李铮2,何艳2,陈华妹2,王旭东2   

  1. 1. 武警贵州总队医院病理科
    2. 贵阳医学院
  • 收稿日期:2014-03-31 修回日期:2014-11-26 出版日期:2015-03-05 发布日期:2015-03-03
  • 通讯作者: 朱筑霞 E-mail:zhuxia@gmc.edu.cn
  • 基金资助:
    贵州省科技攻关项目

Calpeptin inhibits the proliferation of ER negative MDA-MB-231 breast cancer cells induced by EGF

  • Received:2014-03-31 Revised:2014-11-26 Online:2015-03-05 Published:2015-03-03
  • Contact: zhu zhu-xia zhu-xiaZHU E-mail:zhuxia@gmc.edu.cn

摘要: 目的 观察钙蛋白酶对表皮生长因子(EGF)诱导的雌激素受体(ER)阴性乳腺癌细胞增殖的影响。方法 体外培养人乳腺肿瘤系MDA-MB-231,经10ng/mL EGF处理后,用蛋白印迹法检测FAK和CANP1蛋白表达。用CANP抑制剂Calpeptin(CALP)预处理对EGF上述效应的影响;通过集落形成实验检测乳腺癌细胞增殖能力。结果 EGF可诱导FAK蛋白表达上调及蛋白剪切反应(p<0.01),也可诱导CANP1自身蛋白剪切(p<0.05),上述效应可被CALP显著削弱或阻断(p<0.05);EGF还可诱导MDA-MB-231细胞集落形成(p<0.05),此效应也可被CALP预处理显著抑制(p<0.05)。结论CANP可能成为抑制ER阴性乳腺癌细胞增殖的一个潜在药物作用靶点。

关键词: 关键词:表皮生长因子, 钙蛋白酶, 雌激素受体, 细胞生长, 乳腺癌

Abstract: Objective To investigate whether calpain is involved in epidermal growth factor (EGF)-enhanced colony formation in estrogen receptor (ER) negative breast cancer cells. Methods ER-negative MDA-MB-231 breast cancer cells were employed as a model system, Western lot analysis was used to observe protein alterations. Colony formation assay applied to evaluate the role of calpain in EGF-stimulated cell growth. Calpain specific inhibitor, calpeptin (Calp), was employed for pre-treatment of cells to observe its effect on the EGF actions. Results (1) EGF induced over-expression and truncation of FAK (also of cyclin E) protein in MDA-MB-231 breast cancer cells(p<0.01); (2) EGF-enhanced processing of FAK could be blocked by calpeptin(p<0.05); (3) EGF induced calpain 1 autolysis and this effect could be tremendously suppressed by pre-treatment with calpeptin(p<0.05), and (4) Calpeptin greatly inhibited EGF-enhanced cell growth(p<0.05). Conclusion Calpain is possibly a potential target for the treatment of ER-negative breast cancer.

Key words: Key words: Epidermal growth factor, Calpain, estrogen receptor, cell growth, Breast cancer

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