六氧化四砷对乳腺癌MCF—7细胞增殖、迁移 及侵袭能力的影响
2017-06-10刘秋雨裴日周钱林林连增林
刘秋雨+裴日周+钱林林+连增林



摘要:目的 观察六氧化四砷(As4O6)对人乳腺癌MCF-7细胞增殖、迁移及侵袭能力的影响,探讨其作用机制。方法 体外培养人乳腺癌MCF-7细胞,不同浓度As4O6对细胞进行干预。MTT法检测细胞增殖,流式细胞术检测细胞凋亡,划痕愈合实验检测细胞迁移能力,半定量RT-PCR检测细胞周期蛋白E1(Cyclin E1)、细胞周期蛋白A2(Cyclin A2)、半胱氨酸天冬氨酸蛋白酶-3(Caspase-3)、p21和基质金属蛋白酶-9(MMP-9)mRNA表达情况。结果 As4O6对MCF-7细胞增殖有明显抑制作用,且呈剂量依赖性(P<0.01);与对照组(0 μmol/L)比较,As4O6浓度为9、12、15 μmol/L时,MCF-7细胞凋亡率明显增加(P<0.05,P<0.01);As4O6高(3 μmol/L)、低(1 μmol/L)浓度均可有效抑制MCF-7细胞的迁移能力(P<0.01);随As4O6浓度增加,Cyclin E1、Caspase-3、p21 mRNA表达明显升高,Cyclin A2、MMP-9 mRNA表达明显降低(P<0.05,P<0.01)。结论 As4O6对乳腺癌MCF-7细胞增殖、周期、侵袭及迁移能力有明显抑制作用,其机制可能与增强Cyclin E1、Caspase-3、p21及抑制Cyclin A2、MMP-9 mRNA表达有关。
关键词:六氧化四砷;乳腺癌细胞;细胞凋亡;细胞增殖;侵袭;迁移;细胞周期
DOI:10.3969/j.issn.1005-5304.2017.06.011
中图分类号:R285.5 文献标识码:A 文章编号:1005-5304(2017)06-0044-05
Abstract: Objective To observe the effects of tetra-atsenic oxide (As4O6) on the proliferation, migration and invasion of human breast cancer MCF-7 cells; To explore its potential mechanism. Methods The human breast cancer MCF-7 cells were regarded as the research object and cultured in vitro, with different concentrations of As4O6 using to intervene in MCF-7 cells. The cell proliferation was detected by MTT assay; the flow cytometry and wound-healing assay were used to detect the cell apoptosis and migration, respectively. The expressions of Cyclin E1, Cyclin A2, Caspase 3, p21 and MMP-9 mRNA were accessed by semi quantitative RT-PCR. Results As4O6 had a significant inhibitory effect on the proliferation of MCF-7 cells in a dose dependent manner. Compared with the control group (0 μmol/L), the apoptosis rate increased significantly when the concentration of As4O6 was 9, 12, 15 μmol/L (P<0.01). Either As4O6 at high (3 μmol/L) or low (1 μmol/L) concentration could effectively inhibit the migration of MCF-7 cells (P<0.01). With the increasing concentration of As4O6, the expressions of Cyclin E1, Caspase 3, and p21 mRNA significantly increased, while the expressions of Cyclin A2 and MMP-9 mRNA significantly decreased (P<0.05, P<0.01). Conclusion As4O6 can significantly inhibit the proliferation, cycle, invasion and migration of breast cancer MCF-7 cells, and the mechanism may be related to the increase of expressions of cyclin E1, caspase 3, p21 and inhibition of expressions of cyclin A2 and MMP-9.
Key words: tetra-arsenic oxide; breast cancer cells; cell apoptosis; cell proliferation; invasion; migration; cell cycle
砷劑是古老的抗肿瘤药物,以常见的氧化剂和硫化剂等形式存在。《本草纲目》载:“砒石又名信石、砒霜,可治烂肉、蚀瘀及腐瘰。”虽然砷剂被沿用至今,但其毒性限制了其适用范围。三氧化二砷(As2O3)是最广为熟知的砷剂,临床用于急性早幼粒细胞白血病及多种肿瘤的治疗。六氧化四砷(As4O6)对子宫颈癌细胞[1]、人胃癌细胞[2]、上皮癌细胞[3]等均有一定抑制作用,但其对乳腺癌的干预研究鲜有报道。因此,本研究观察不同浓度As4O6对人乳腺癌MCF-7细胞增殖、凋亡、周期和侵袭、迁移能力的影响,为As4O6干预乳腺癌的分子作用机制提供依据。endprint
1 实验材料
1.1 细胞
人乳腺癌MCF-7细胞株,中国科学院上海细胞库。
1.2 药物及制备
As4O6,纯度99.99%,韩国Chonjisan Co., Ltd.公司。称取一定量As4O6溶解于水中,配制成5 mmol/L母液,过滤,室温保存备用,临用时以培养基稀释至不同浓度。
1.3 主要试剂与仪器
胎牛血清(FBS)、0.25%胰蛋白酶、MEM培养液,Hyclone公司。……
