雌激素通过调控RCC2参与乳腺癌细胞凋亡
2018-09-10王伟琦郑亚冰李昌刘春燕汤俊怡常晓天
王伟琦 郑亚冰 李昌 刘春燕 汤俊怡 常晓天
【摘要】 目的 探索雌激素刺激乳腺癌病变过程中染色体缩合调控子2(RCC2)的作用及机制。方法 收集乳腺标本,用蛋白免疫印迹法检测RCC2蛋白表达水平;分别用雌激素(雌二醇)、RCC2 小干扰RNA(siRNA),雌激素联合RCC2 siRNA处理MCF-7细胞,检测细胞增殖与凋亡。结果 与乳腺纤维瘤组织相比,RCC2在雌激素受体阳性(ER+)乳腺癌组织中的表达水平升高(P=0.001),在ER-乳腺癌组织中无升高(P=0.404)。抑制RCC2后ER+乳腺癌细胞系MCF-7增殖无变化(F处理=0.003,P=0.957),但凋亡比例比Allstars siRNA组高(t=2.679,P=0.037);雌二醇处理MCF-7后增殖能力增强(F=110.323,P
【关键词】 染色体缩合调控子2;雌激素;乳腺癌;细胞凋亡;细胞增殖
【Abstract】 Objective To explore the role of chromosomal condensation regulator 2 (RCC2) during the process of estrogen promoting the progression of breast cancer. Methods Human breast tissues were collected. Western blot was utilized to quantitatively detect the expression level of RCC2 protein. MCF-7 cells were treated with estrogen or RCC2 siRNA and combined use of estrogen and RCC2 siRNA. The cell apoptosis and cell proliferation were detected. Results Compared with the breast fibroma tissues, the expression level of RCC2 in the ER+breast cancer tissues was significantly up-regulated (P=0.001), but there was no significant change in the ER-breast cancer tissues (P=0.404). After inhibiting the expression of RCC2, the proliferation of MCF-7 cells did not significantly change (F=0.003, P=0.957), whereas the apoptosis ratio of MCF-7 cells was significantly higher than that in the Allstars siRNA group (t=2.679, P=0.037). After treated with E2, the proliferation of MCF-7 cells was evidently enhanced (F=110.323, P
【Key words】 Chromosomal condensation regulator 2; Estrogen; Breast cancer;
Cell apoptosis; Cell proliferation
乳腺癌是全球妇女最常见的恶性肿瘤,雌激素受体阳性(ER+)的乳腺癌患者占总比约70%[1]。目前乳腺癌早期诊断方法主要为影像学检查,寻找诊断及判断乳腺癌预后的明星基因十分必要[2]。染色体缩合调控子2(RCC2)也被称作TD60,位于染色体1p36位点[3]。其在胃癌组织中显著上调,可筛选结直肠癌高危人群,同时也是黑色素瘤复发及生存率的决定因素[4-6]。最近有学者发现RCC2可通过诱导上皮细胞-间充质转化(EMT)促进肺腺癌的转移[7]。尽管RCC2与众多肿瘤的发生相关,但RCC2是否参与乳腺癌的致病至今尚未明确。在本研究中,笔者探究了RCC2是否在乳腺癌的致病过程中发挥作用,以及雌激素是否参与其中,从而为更有效治疗乳腺癌、提高患者生存率提供参考依据。
材料与方法
一、材 料
1.乳腺组织的获取
收集2014年6月至2016年12月滕州市中心人民医院保存的18例患者的乳腺组织,其中乳腺癌组织13例(ER+组织8例、ER-组织5例),乳腺纤维瘤组织5例。……
