摘要
目的研究RNA干扰(RNAi)对兔血管平滑肌细胞(VSMCs)bcl-2基因表达的干扰效应。方法用脂质体法将构建的装载靶向bcl-2基因小干扰性RNA(siRNA)的表达载体(pshRNA-bcl-2质粒)转染VSMCs(基因组),以转染空载体的细胞和加DMEM的空白细胞作为对照,采用半定量RT-PCR和Westernblot法检测bcl-2基因的表达,用MTT法检测VSMCs生长情况。结果转染siRNA的表达载体可以抑制内源性bcl-2基因在转录和转译水平上的表达,基因组bcl-2的mRNA和蛋白表达较空载体组和空白对照组明显减少(P<0.01);基因组的VSMCs生长也较空载体组和空白对照组明显受到抑制(P<0.01)。结论载体介导的RNAi技术可明显抑制内源性bcl-2基因的表达和VSMCs生长。
Objective To study the inhibitory effect of RNA interference （RNAi） on bcl-2 expression of vascular smooth muscle cells （VSMCs） in rabbit. Methods The expression vector of bcl-2 gene-targeting small interference RNA （pshRNA-bcl-2） was constructed and was transfected into VSMCs by lipofectamine, and the unloaded vector was used as control. The expression of bcl-2 mRNA was identified by RT-PCR and Western blot, respectively. The growth of the transfected VSMCs was examined by MTT. Results The pshRNA-bcl-2 may inhibit the expression of bcl-2 gene at the levels of transcription and translation. There were significant differences （P〈0.01） of the expressions of bcl-2 mRNA between the VSMCs that were transfected with pshRNA-bcl-2 and the ones in plasmid transfected group and control group, respectively. There was a significant difference （P〈0.01） in the growth of VSMCs between the plasmid transfected and the control groups. Conclusion The plasmid containing the small interference RNA of bcl-2 may have an inhibitory effect on the cell growth and endogenous expression of bcl-2 gene at the levels of transcription and translation in VSMCs.
出处
《中国普外基础与临床杂志》
CAS
2007年第1期56-58,共3页
Chinese Journal of Bases and Clinics In General Surgery
基金
国家自然科学基金资助项目(编号:30170926)~~
