盐霉素对乳腺癌MCF-7球囊细胞增殖与上皮间质转化作用的研究  

The study on the role of salinomycin in the proliferation and epithelial-mesenchymal transition of breast cancer MCF-7 mammosphere cells

作　　者：马赫遥 付婴子[1] 何苗[1] 颜媛媛[1] 江茜[1] 孙也之[1] 魏敏杰[1] 

机构地区：[1]中国医科大学药学院药理教研室,110122

出　　处：《天津医药》2016年第6期675-678,共4页Tianjin Medical Journal

基　　金：国家自然科学基金资助项目(81373427;81572898);辽宁省高等学校优秀人才支持计划项目(LJQ2014084)

摘　　要：目的探讨盐霉素(Salinomycin)对MCF-7球囊(MCF-7 MS)细胞的增殖与上皮间充质转化(EMT)的作用。方法通过乳腺癌MCF-7细胞无血清悬浮培养富集乳腺癌干细胞(BCSCs)得到MCF-7 MS;CCK-8 assay检测0、10、30、100、300、1 000、3 000及10 000 nmol/L浓度的盐霉素处理24 h对MCF-7 MS细胞存活率的影响,并计算半抑制浓度(IC50)值。Western blot检测30、60 nmol/L终浓度的盐霉素对MCF-7 MS细胞上皮标志物E-钙黏蛋白(E-cadherin)和间质化标志物Snail表达的影响,以等体积DMSO处理的MCF-7 MS细胞作为对照组。BALB/c裸鼠皮下接种MCF-7 MS细胞制备荷瘤鼠模型并分为对照组(等体积生理盐水处理)和盐霉素给药组(5 mg/kg盐霉素处理),免疫组织化学染色检测瘤组织E-cadherin和Snail的表达。结果随着浓度的增加,MCF-7 MS细胞存活率逐渐下降(P<0.05),24 h的IC50值为989 nmol/L。与对照组比较,30和60 nmol/L的盐霉素均可增加E-cadherin的表达,而降低Snail的表达,且后者作用更明显(P<0.05)。与对照组相比,盐霉素给药组荷瘤鼠瘤组织内E-cadherin的表达升高,而Snail的表达下调(P<0.01)。结论盐霉素能够抑制具有BCSCs特性的MCF-7 MS细胞的增殖,且可抑制MCF-7 MS细胞的EMT,是靶向肿瘤干细胞的潜在药物。Objective To investigate the effects of salinomycin on the cell proliferation and epithelial-mesenchymal transition (EMT) of MCF-7 mammosphere (MCF-7 MS). Methods Breast cancer MCF-7 cells were cultured in suspension in serum-free medium to obtain MCF-7 MS. The cell viability of MCF-7 MS cells treated with serial concentrations of 0, 10, 30, 100, 300, 1 000, 3 000 and 10 000 nmol/L of salinomycin for 24 hours were detected by CCK-8 assay. The half maximal inhibitory concentration (IC50) was calculated. Western blot analysis was performed to detect the expression levels of E-cadherin and Snail in MCF-7 MS cells treated with 30 nmol/L and 60 nmol/L salinomycin. The same capacity of DMSO was added to MCF-7 MS as control group. The xenograft tumors from MCF-7 MS transplant mice were divided into control group (the same capacity of normal saline) and salinomycin group (5 mg/kg salinomycin), then the expressions of E-cadherin and Snail were dectected by immunohistochemical staining. Results With the increased concentration of salinomycin, the cell survival rate of MCF-7 MS cells decreased (P<0.05). The IC50 after 24 h-treatment was 989 nmol/L. Both 30 and 60 nmol/L of salinomycin increased the expression of E-cadherin and decreased the expression of Snail compared with control group. In addition, 60 nmol/L treatment group showed more significant effect (P<0.05). In xenograft tumors from MCF-7 MS transplant mice, the expression of Snail decreased, and E-cadherin increased in salinomycin treatment group compared with control group (P<0.01). Conclusion Salinomycin can inhibit the cell proliferation and EMT in MCF-7 MS cells, which is a potential drug to target cancer stem cells.

关 键 词：乳腺肿瘤 癌 肿瘤干细胞 细胞增殖 上皮间充质转化 MCF-7球囊细胞 

分 类 号：R737.9[医药卫生—肿瘤]