南方医科大学学报

南方医科大学学报 ›› 2018, Vol. 38 ›› Issue (11): 1325-.doi: 10.12122/j.issn.1673-4254.2018.11.08

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SIRT1通过调控Snail表达参与食管癌EC-9706和Eca-109细胞的上皮间质转化

吴宇翔，辛道，刘灿，王峰   

  • 出版日期:2018-11-20 发布日期:2018-11-20

SIRT1 participates in epithelial-mesenchymal transition of EC-9706 and Eca-109 cells in vitro by regulating Snail expression

  • Online:2018-11-20 Published:2018-11-20

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摘要： 目的探讨沉默信息调节因子1（SIRT1）诱导食管癌EC-9706和Eca-109细胞上皮间质转化（EMT）发生中的作用和机制。 方法转染3条化学合成SIRT1 siRNA入食管癌EC-9706和Eca-109细胞，以空白细胞和转染阴性对照siRNA细胞作为对照， real-time PCR和western blot 检测转染效果。Transwell 侵袭小室和划痕实验检测各组细胞的侵袭转移能力变化。Real-time PCR和Western blot检测各组细胞上皮间质转化相关分子E-cadherin和vimentin的表达变化，同时进一步检测E-cadherin转录 抑制因子Snail、twist1 和ZEB的表达变化。结果与空白组和阴性对照组细胞相比，转染SIRT1 siRNA1 和SIRT1 siRNA3 的 EC-9706和Eca-109细胞SIRT1 mRNA和蛋白表达均明显降低，差异有统计学意义（P<0.01）。Transwell侵袭小室和划痕实验 结果显示转染SIRT1 siRNA1和SIRT1 siRNA3组EC-9706和Eca-109细胞穿膜细胞数和划痕愈合能力较空白组和阴性对照组 细胞下降，差异有统计学意义（P<0.05）。转染SIRT1 siRNA1和SIRT1 siRNA3组EC-9706和Eca-109细胞E-cadherin表达明显 升高，而vimentin 表达下降，与空白组和阴性对照组细胞相比差异有统计学意义（P<0.05）。转染SIRT1 siRNA1 和SIRT1 siRNA3组EC-9706细胞Snail表达下降，与空白组和阴性对照组细胞相比差异有统计学意义（P<0.01）。转染SIRT1 siRNA1和 SIRT1 siRNA3 组Eca-109 细胞Snail 和twist1 表达下降，与空白组和阴性对照组细胞相比差异有统计学意义（P<0.01）。结论 SIRT1有可能通过调控Snail表达诱导EMT发生从而在食管癌细胞侵袭转移中发挥作用。

Abstract: Objective To explore the role of SIRT1 in the occurrence of epithelial-mesenchymal transition (EMT) in EC-9706 and Eca-109 cells and the possible mechanism. Methods Three chemically synthesized siRNA targeting SIRT1 were transfected into EC-9706 and Eca-109 cells with the non-transfected cells and cells transfected with the negative siRNAs as controls. Real-time PCR and Western blotting were used to detect the expressions of SIRT1, E-cadherin, vimentin, Snail, Twist1 and ZEB in the cells. Transwell invasion assay and wounding healing assay were used to examine the changes in the invasion and metastasis abilities of the cells after transfection. Results EC-9706 and Eca-109 cells transfected with SIRT1 siRNA1 and SIRT1 siRNA3 showed significantly decreased mRNA and protein expressions of SIRT1 (P<0.05). Transwell invasion assay and wounding healing assay showed that transfection with SIRT1 siRNA1 and SIRT1 siRNA3 caused significantly lowered invasion and metastasis abilities in EC-9706 and Eca-109 cells (P<0.05). In EC-9706 and Eca-109 cells transfected with SIRT1 siRNA1 and SIRT1 siRNA3, the expression level of E-cadherin was significantly increased while the expressions of vimentin, Snail and Twist were significantly lowered (P<0.05). Conclusion SIRT1 participates in the invasion and metastasis of EC-9706 and Eca- 109 cells probably by inducing EMT via regulating the expression of Snail.