全反式维甲酸对乳腺癌MCF-7细胞周期和增殖活性的影响及restin基因表达的初步研究

目的:检测全反式维甲酸(all-trans retinoic acid,ATRA)在乳腺癌MCF-7细胞周期、增殖、分化和凋亡过程中的作用,以及对。restin基因表达的影响,从而为研究其功能提供线索。方法:用流式细胞仪(FCM)检测细胞周期的变化;MTT 法检测细胞增殖活性;RT-PCR检测restin基因表达。结果:在ATRA诱导下,细胞出现G1期阻滞和生长抑制,增殖活性下降,restin基因开始表达,并呈增长趋势。结论:在ATRA诱导MCF-7细胞分化、凋亡过程中,ATRA能使MCF-7细胞 G1期阻滞,并能抑制MCF-7细胞生长,促使其凋亡,restin基因参与细胞周期的调控,特别是细胞凋亡。

Effects of all-trans retinoic acid on cell cycle and proliferation of MCF-7 and expression of restin

To study the role of all-trans retinoic acid(ATRA) in cell cycle, proliferation, differentiation and apoptosis of breast cancer cell line MCF-7 and the expression of restin gene. Methods: The cell cycle was observed by means of flow cytometry(FCM) , the cell proliferation was detected by MTT assay and the expression of restin mRNA was examined by RT-PCR. Results: Under the treatment by ATRA, the cell growth arrested at G1 phase and the proliferation was inhibited greatly. The level of restin mRNA was found to be up-regulated by ATRA in MCF-7 cell. Conclusion: G1 phase arrest and proliferation inhibition were involved in the process that ATRA induces MCF-7 cell differentiation and apoptosis, and restin maybe play an important role in this process, especially the cell apoptosis.