沉默HOXC8增加A549细胞对放射敏感性作用机制研究

目的 探讨HOXC8对非小细胞肺癌A549细胞放射敏感性影响及潜在机制,以期为临床联合治疗提供新思路。方法 慢病素感染构建稳定沉默HOXC8的A549细胞,qPCR和蛋白印迹法进行验证;克隆形成实验检测A549稳转株对放射敏感性影响;蛋白印迹法检测沉默HOXC8后TGF-β1及其下游信号蛋白表达变化。结果 成功构建沉默HOXC8的A549稳转株;沉默HOXC8后A549细胞活力和克隆形成能力显著降低;沉默HOXC8后也增加了A549细胞对放射的敏感性;沉默HOXC8显著抑制了TGF-β1及其下游信号蛋白p-Smad2/3表达。结论 沉默HOXC8可能通过抑制TGF-β1信号转导增加A549细胞对放射的敏感性,HOXC8可能在其中起重要作用。

Mechanism of Silencing HOXC8 Increases Radiosensitivity of A549 Cells

Objective To investigate the effect and potential mechanism of HOXC8 on the radiosensitivity of non-small cell lung cancer cell line A549, aiming to provide novel ideas for clinical combined treatment. Methods The A549 cells with stable knockdown of HOXC8 were constructed by using lentivirus and validated by qPCR and Western blot. The radiosensitivity of A549 stable cell line was assessed by plate clone formation assay. The expression levels of TGF-β1 and the proteins in the downstream signal pathway after knockdown of HOXC8 were detected by Western blot. Results The A549 cells with stable knockdown of HOXC8 were successfully constructed. The viability and clonogenic capacity of A549 cells were significantly reduced after silencing HOXC8. Silencing HOXC8 also increased the sensitivity of A549 cells to radiotherapy and significantly inhibited the expression of TGF-β1 and p-Smad2/3 proteins in the downstream signaling pathway. Conclusion Silencing HOXC8 can increase the sensitivity of A549 cells to radiotherapy probably by inhibiting TGF-β1 signaling transduction. HOXC8 might play an important role in A549 cells.