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- 2015
沉默Toll样受体4表达对肺腺癌A549细胞凋亡及细胞周期的影响DOI: 10.3971/j.issn.1000-8578.2015.03.003 Keywords: A Meta-analysis,Progress of Relationships of Calprotectin with Tumours,Effect of GANT61 on Apoptosis of Esophageal Squamous Carcinoma Cells and Its Mechanism,Effect of Rap2a on Invasion and Metastasis of Lung Cancer Cells and Its Related Mechanism,Immune Killing Effect of Silencing TIPE2 Expression on T Lymphocytes Against Lung Adenocarcinoma Cells LA795,NSCLC的疫苗治疗研究进展,Experiment of Different Administration Sequences of Apatinib and Paclitaxel on Lung Cancer Abstract: 摘要 目的 探讨Toll样受体4(Toll-like receptor 4,TLR4)对肺腺癌A549细胞凋亡及细胞周期的影响。方法 体外化学合成针对TLR4的小干扰RNA(TLR4-siRNA),通过脂质体介导转染人肺腺癌A549细胞。采用Real-time PCR和流式细胞仪检测分析干扰后A549细胞中TLR4 mRNA及蛋白的表达情况。另外,采用流式细胞仪检测分析干扰72 h后细胞凋亡率和细胞周期的变化。结果 与对照组比较,转染TLR4-siRNA后,A549细胞中TLR4 mRNA及蛋白的表达显著下降(P<0.05),细胞的凋亡率明显增加[(1.73 ± 0.32)% vs.(7.40 ± 0.75)%(P<0.01)],细胞周期出现G0/G1期停滞[(48.21 ± 1.15)%vs.(66.26 ± 2.45)%(P<0.05)],同时S期细胞比例明显减少[(34.25 ± 1.46)% vs.(22.63 ± 3.39)%(P<0.05)]。结论 TLR4-siRNA能有效沉默A549细胞中TLR4的表达,在促进细胞凋亡的同时能够影响细胞周期分布从而抑制肿瘤细胞的生长,特异性干预TLR4基因的表达有望成为治疗肺癌的一种新手段
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