钙调素拮抗剂O-4-乙氧基-丁基-小檗胺对人乳腺癌细胞MCF-7生长的影响及相关作用机制

Effect of Calmodulin Antagonist O-4-ethoxiyl-butyl-berbamine on the Proliferation of Human Breast Cancer Cell Line MCF-7 and Its Relevant Mechanism

目的探讨钙调素拮抗剂O-4-乙氧基-丁基-小檗胺(EBB)对人乳腺癌细胞系MCF-7生长的影响及其作用机制。方法采用不同浓度EBB作用于MCF-7,MTT法检测其对MCF-7细胞的作用,流式细胞仪检测细胞周期,激光扫描共聚焦显微镜检测细胞骨架、线粒体、内质网等亚细胞结构。结果EBB对MCF-7细胞的IC50为(13.0±3.7)μmol/L,并可使S期细胞显著增加(P<0.05)。EBB作用可导致MCF-7细胞出现微管解聚、微丝重排、线粒体破裂和内质网肿胀,且随剂量增加效应增强。结论EBB可将MCF-7细胞阻滞于S期,抑制其增殖,其机制可能与细胞骨架、线粒体和内质网的结构和功能改变有关。

Objective To investigate the effect of calmodulin antagonist 0- （4-ethoxiyl-butyl） -berbamine （EBB） on proliferation of human breast cancer cell MCF-7 and its possible mechanism. Methods MTr assay was used to analyze the effect of EBB on tumor cells Flow cytometry was used to detect its impact on the cell cycle of MCF-7 cells. Immunofluoresce labeling technique and laser scanning confocal microscope were used to reveal the changes of the microtubule, microfilament, mitochondrion, and endoplasmic reticulum in the cells. Results The IC50 value of EBB in MCF-7 cells was （ 13.0 ± 3.7 ） μmol/L. MCF-7 ceils were arrested at S phase after EBB treatment. Meanwhile, depolymerization of the microtubule and microfilament, impairment of the mitochondrion and swelling of endoplasmic reticulum were observed. Conclusion EBB arrests MCF-7 ceils at S phase by inhibiting the growth of MCF-7 cells, which may be related to the changes of structures and functions of the microtubule, microfilament, mitochondrion, and endoplasmic reticulum.