丁酸钠对人结肠癌细胞株HCT-116细胞凋亡及基质相互作用分子和Orai1蛋白活性的影响

摘要

目的 研究丁酸钠诱导结肠癌细胞株HCT-116细胞凋亡机制.方法 hoechst 33342和AnnexinV+PI检测丁酸钠诱导结肠癌细胞HCT-116的凋亡作用；免疫荧光法检测丁酸钠对基质相互作用分子(STIM1)和钙离子通道Orai1蛋白在细胞内定位的影响；免疫印迹法检测STIM1和Orai1蛋白表达量的变化.结果 丁酸钠可诱导结肠癌细胞HCT-116凋亡、STIM1移位并与Orai1具有共定位现象.结论 丁酸钠可通过调节STIM1和Orai在结肠癌细胞中的定位而促发细胞凋亡.%Objective To investigate the mechanism underlying sodium butyrate (NaB)-induced apoptosis of a human colon cancer cell line HCT-116. Methods The apoptosis of HCT-116 cells induced by NaB was confirmed by hoechst33342 staining and AnnexinV+ PI assay. The changes in the intracellular localization of stromal interaction molecule (STTM1) and Orail following NaB treatment were detected by immunofluorescence technique. Western blotting was used to investigate the protein expression levels of STIM1 and Orail. Results NaB induced apoptosis and caused translocation and colocalization of STIM1 and Orail in HCT-116 cells. Conclusion The apoptosis of human colon cancer cells induced by NaB is correlated to the redistribution of STTM1 and Orail.