OBJECTIVE To inhibit the expression of the vascular endothelial growth factor (VEGF) by RNA interference, and to observe the effect in different cells line. METHODS Using the services of E-RNAi, we designed and constr...OBJECTIVE To inhibit the expression of the vascular endothelial growth factor (VEGF) by RNA interference, and to observe the effect in different cells line. METHODS Using the services of E-RNAi, we designed and constructed two kinds of shRNAs expression vectors which were aimed at the VEGF gene. These vectors were then transfected into HEK293, colon cancer HT29, Hela and HepG2 cells by LipofectamineTM 2000. The level of VEGF mRNA was determined by RT-PCR and Northern blotting and the VEGF expression was examined by immunofluoresence staining. RESULTS The two kinds of VEGF specific shRNAs expression vectors were found to efficiently inhibit the expression of VEGF in HEK293 and HT29 cells by RT-PCR analysis, with inhibition rates of 72% and 42%, respectively; but the inhibition rates were reduced to 28% in Hela cells and 13% in HepG2 cells. Northern blotting showed that the inhibition rates of VEGF mRNA expression were 88% and 89% in HEK293 and HT29 cells, respectively. The inhibition rate of VEGF protein expression in HT29 cells was 73% based on immunofluoresence staining. CONCLUSION The expression of VEGF was inhibited by RNA interference, but differed with various cells lines, showing that RNA interference was cell-line dependent.展开更多
目的:探讨RNA干扰(RNAi)技术对SKOV3卵巢癌细胞株Skp2表达的抑制作用。方法:设计合成针对Skp2的小干涉RNA(siRNA)并进行转染。实验分为空白对照组、转染组1、转染组2、转染对照组及阴性对照组。采用Real time PCR和Western blotting技...目的:探讨RNA干扰(RNAi)技术对SKOV3卵巢癌细胞株Skp2表达的抑制作用。方法:设计合成针对Skp2的小干涉RNA(siRNA)并进行转染。实验分为空白对照组、转染组1、转染组2、转染对照组及阴性对照组。采用Real time PCR和Western blotting技术检测各组Skp2mRNA和蛋白水平的变化,通过细胞计数试剂盒-8(CCK-8)法检测各组卵巢癌细胞增殖情况。结果:应用Skp2-siRNA干扰SKOV3卵巢癌细胞株后,转染组1、转染组2的Skp2mRNA和蛋白表达水平明显降低,细胞增殖明显受限,与空白对照组相比较,差异有统计学意义(P<0.05),转染组1与转染组2之间差异无统计学意义(P>0.05)。转染组1与转染组2基因沉默效率分别为75.31%和76.86%,蛋白抑制率分别为62.10%和63.11%,细胞增殖抑制率分别为52.75%和53.06%。结论:RNAi技术能够抑制SKOV3卵巢癌细胞株Skp2的表达,从而抑制卵巢癌细胞的增殖。展开更多
目的研究靶向抑制乏氧诱导因子(HIF)-1α基因对Tca8113及Tscca舌癌细胞株增殖的影响。方法将HIF-1α基因的短发夹干扰RNA(shRNA)的表达载体与空载质粒分别转染人舌癌细胞中作为siHIF-1α组和空载组,半定量RT-PCR及Western blot法检测HI...目的研究靶向抑制乏氧诱导因子(HIF)-1α基因对Tca8113及Tscca舌癌细胞株增殖的影响。方法将HIF-1α基因的短发夹干扰RNA(shRNA)的表达载体与空载质粒分别转染人舌癌细胞中作为siHIF-1α组和空载组,半定量RT-PCR及Western blot法检测HIF-1α的mRNA及蛋白表达。软琼脂克隆形成实验观察细胞的增殖;细胞计数法检测活细胞的数量;流式细胞分析术检测细胞周期的分布;同时将舌癌细胞接种至裸鼠皮下,观察体内的成瘤情况。结果 HIF-1αshRNA质粒转染舌癌细胞株后,HIF-1α的mRNA及蛋白表达明显下降。siHIF-1α组细胞在软琼脂中形成克隆的能力显著下降。细胞计数表明siHIF-1α组活细胞数量减少。转染后乏氧培养48 h si HIF-1α组细胞周期阻滞于G0/G1期。舌癌细胞移植到裸鼠体内数天后siHIF-1α组成瘤体积明显小于空载组(P<0.05)。结论 HIF-1α基因能够促进舌癌细胞增殖活性,有可能成为未来治疗舌癌的一个潜在作用靶点。展开更多
基金This work was supported in part by re-search grants from the National NaturalScience Foundation of China (No.30300298), and the National NaturalScience Foundation of China's JointResearch Fund for Overseas ChineseYoung Scholars Grant (No. 30228026).
文摘OBJECTIVE To inhibit the expression of the vascular endothelial growth factor (VEGF) by RNA interference, and to observe the effect in different cells line. METHODS Using the services of E-RNAi, we designed and constructed two kinds of shRNAs expression vectors which were aimed at the VEGF gene. These vectors were then transfected into HEK293, colon cancer HT29, Hela and HepG2 cells by LipofectamineTM 2000. The level of VEGF mRNA was determined by RT-PCR and Northern blotting and the VEGF expression was examined by immunofluoresence staining. RESULTS The two kinds of VEGF specific shRNAs expression vectors were found to efficiently inhibit the expression of VEGF in HEK293 and HT29 cells by RT-PCR analysis, with inhibition rates of 72% and 42%, respectively; but the inhibition rates were reduced to 28% in Hela cells and 13% in HepG2 cells. Northern blotting showed that the inhibition rates of VEGF mRNA expression were 88% and 89% in HEK293 and HT29 cells, respectively. The inhibition rate of VEGF protein expression in HT29 cells was 73% based on immunofluoresence staining. CONCLUSION The expression of VEGF was inhibited by RNA interference, but differed with various cells lines, showing that RNA interference was cell-line dependent.
文摘目的:探讨RNA干扰(RNAi)技术对SKOV3卵巢癌细胞株Skp2表达的抑制作用。方法:设计合成针对Skp2的小干涉RNA(siRNA)并进行转染。实验分为空白对照组、转染组1、转染组2、转染对照组及阴性对照组。采用Real time PCR和Western blotting技术检测各组Skp2mRNA和蛋白水平的变化,通过细胞计数试剂盒-8(CCK-8)法检测各组卵巢癌细胞增殖情况。结果:应用Skp2-siRNA干扰SKOV3卵巢癌细胞株后,转染组1、转染组2的Skp2mRNA和蛋白表达水平明显降低,细胞增殖明显受限,与空白对照组相比较,差异有统计学意义(P<0.05),转染组1与转染组2之间差异无统计学意义(P>0.05)。转染组1与转染组2基因沉默效率分别为75.31%和76.86%,蛋白抑制率分别为62.10%和63.11%,细胞增殖抑制率分别为52.75%和53.06%。结论:RNAi技术能够抑制SKOV3卵巢癌细胞株Skp2的表达,从而抑制卵巢癌细胞的增殖。
文摘目的研究靶向抑制乏氧诱导因子(HIF)-1α基因对Tca8113及Tscca舌癌细胞株增殖的影响。方法将HIF-1α基因的短发夹干扰RNA(shRNA)的表达载体与空载质粒分别转染人舌癌细胞中作为siHIF-1α组和空载组,半定量RT-PCR及Western blot法检测HIF-1α的mRNA及蛋白表达。软琼脂克隆形成实验观察细胞的增殖;细胞计数法检测活细胞的数量;流式细胞分析术检测细胞周期的分布;同时将舌癌细胞接种至裸鼠皮下,观察体内的成瘤情况。结果 HIF-1αshRNA质粒转染舌癌细胞株后,HIF-1α的mRNA及蛋白表达明显下降。siHIF-1α组细胞在软琼脂中形成克隆的能力显著下降。细胞计数表明siHIF-1α组活细胞数量减少。转染后乏氧培养48 h si HIF-1α组细胞周期阻滞于G0/G1期。舌癌细胞移植到裸鼠体内数天后siHIF-1α组成瘤体积明显小于空载组(P<0.05)。结论 HIF-1α基因能够促进舌癌细胞增殖活性,有可能成为未来治疗舌癌的一个潜在作用靶点。