MicroRNA-204对胶质瘤细胞U251自噬的影响

目的 探讨microRNA-204(miR-204)对胶质瘤细胞U251自噬的影响。方法 采用体外瞬时转染的方法抑制U251细胞中miR-204,MTT方法检测细胞的增殖情况,免疫荧光检测细胞自噬,Western blot检测自噬相关蛋白LC3、Beclin1和Bcl-2的表达情况。结果 MTT结果显示抑制miR-204明显增加U251细胞的增殖,免疫荧光结果显示抑制miR-204能够减少U251细胞的自噬,Western blot结果显示抑制miR-204能够减少U251细胞内LC3-Ⅱ和Beclin1的表达量,然而Bcl-2的表达却明显增加。结论 miR-204可能通过上调Bcl-2的表达抑制自噬促进胶质瘤生长,提示miR-204可能成为脑胶质瘤潜在治疗靶点。

The effect of microRNA-204 on autophagy in U251

Objective To investigate the effect of microRNA-204(miR-204)on autophagy in U251. Methods Inhibition of miR-204 in U251 cell lines was done by transfection of miR-204 inhibitor(AMO-204) .Cell viability was detected by MTT assay.The autophagy of U251 was tested by immunofluorescence tech-nique.The protein level of Beclin 1,LC3 and Bcl-2 was detected by Western blot.Results Cell viability was markedly increased after inhibition of miR-204 in U251 cells.The number of autophagosome was decreased.The levels of Beclin 1 and LC3 were decreased,the protein level of Bcl-2 was significant increased by transfection of AMO-204 in U251 cells(P<0.05).Conclusion MiR-204 might at least in part promote glioma via inhibi-ton autophagy,indicating that miR-204 might be a potential target for the treatment of glioma.