miRNA-19a对结肠癌LoVo细胞生物学特性影响的机制研究

The mechanism study of miRNA-19a impacting on biological characteristics of colon cancer LoVo cell

目的探讨微小RNA(miRNA)-19a对结肠癌LoVo细胞生物学特性影响的可能机制。方法采用脂质体介导的转染方法将miRNA-19a模拟物转染到人结肠癌细胞系LoVo细胞;检测转染后miRNA-19a基因的表达;利用CCK8试剂盒检测细胞的增殖能力,TUNEL法检测细胞凋亡影响,细胞侵袭小室法检测细胞的体外侵袭力,RT-PCR和Western blot检测Hsp90/Akt信号通路的变化。结果转染miRNA-19a的结肠癌LoVo细胞,miRNA-19a表达上调,细胞体外增殖能力增强,细胞凋亡减少,细胞的侵袭力增强;细胞Hsp90和Akt的基因和蛋白表达升高。结论 miRNA-19a可通过上调Hsp90/Akt信号通路表达,促进LoVo细胞增殖,减少细胞凋亡,增强LoVo细胞的侵袭能力。

Objective To investigate the mechanism of miRNA-19 aimpacting on biological characteristics of colon cancer Lovo cell.Methods miRNA-19 amimics was transfected into human colon cancer cell line LoVo cells by liposome mediated transfection.The expression of miRNA-19 agene after transfection was detected.Cell proliferation was detected by CCK8 Kit.The effect of apoptosis was detected by TUNEL method.In vitro invasiveness of cells was detected by cell invasion chamber method.Hsp90/Akt signaling pathways changes were detected by RT-PCR and Western blot.Results The expression of miRNA-19 awere increased.The ability of proliferation were promoted in vitro.The cell apoptosis was reduced.The cell invasion was increased.The expression of Hsp90 and Akt gene and protein were increased.Conclusion miRNA-19 acould enhance Lovo cell invasion ability by the method of raising the expression of Hsp90 and Akt signaling pathways,accelerating LoVo cell proliferation,reducing cell apoptosis.