香烟烟雾促进膀胱癌干细胞的自我更新和干性基因的表达

Tobacco smoke promoted the self-renewal ability and expression of stemness genes of bladder cancer stem cells

目的:探讨香烟烟雾对膀胱癌干细胞自我更新能力和干性基因表达的影响。方法:用不同浓度(0%、0.1%和0.25%)的香烟烟雾悬液处理人膀胱癌细胞UM-UC-3来源的膀胱癌干细胞4 d,显微镜下观察膀胱癌干细胞球大小及数量,蛋白质印迹检测干性基因CD44、ALDH1-A1、OCT-4、Nanog等的蛋白表达。结果:0.1%和0.25%的香烟烟雾悬液能够促进膀胱癌干细胞细胞球的形成,香烟烟雾处理组的细胞球明显大于对照组;蛋白质印迹结果显示,0.1%和0.25%的香烟烟雾悬液处理的膀胱癌干细胞CD44、ALDH1-A1、OCT-4、Nanog表达显著增加。结论:香烟烟雾能够促进膀胱癌干细胞的自我更新和干性基因的表达。

Objective:To investigate the effect of tobacco smoke on self-renewal ability and stemness genes expression of bladder cancer stem cells.Methods:The bladder cancer stem cells obtained from human bladder cancer cells UM-UC-3 were treated with different concentrations of cigarette smoke extract(CSE,0%,0.1%and 0.25%)for 4 days.The effect of CSE on the sizes and quantities of bladder cancer stem cells spheres were observed.The expression of stemness genes CD44,ALDH1-A1 OCT-4,and Nanog were detected by Western blotting.Results:0.1%and 0.25%CSE promoted the formation of bladder cancer stem cell spheres,while the cell spheres of CSE groups were significantly larger than the control group;Western blotting results showed that the expression of CD44,ALDH1-A1,OCT-4,and Nanog were significantly increased in 0.1%and 0.25%CSE groups.Conclusion:Tobacco smoke can promote the self-renewal ability of bladder cancer stem cells and upregulate the expression levels of CD44,ALDH1-A1 OCT-4,and Nanog.