姜黄素通过Erk1/2信号通路抑制人肾癌细胞786-O在裸鼠体内增殖

Curcumin inhibits the proliferation of human renal cell carcinoma 786-O in nude mice via Erk1/2 signaling pathway

目的:探讨姜黄素对786-O细胞在体内增殖的抑制效果及其可能机制。方法:将人肾癌细胞786-O接种裸鼠,成瘤后将裸鼠随机分为2组,干预组给予姜黄素干预治疗,对照组则采用PBS对照治疗。测定干预组肿瘤的抑制率,并采用Westernblot和免疫组织化学方法检测p-Erk1/2和p-Akt表达。结果:经过连续20d给药治疗,干预组裸鼠的瘤体平均质量为(1.03±0.17)g,对照组裸鼠的瘤体平均质量为(2.46±0.48)g,2组差异有统计学意义(P=0.02)。采用姜黄素干预后小鼠的肿瘤抑制率达58.13%。Westernblot及免疫组织化学染色结果均证实干预组裸鼠瘤内Erk1/2的磷酸化水平显著低于对照组(P<0.01),而2组Erk1/2、Akt及p-Akt表达水平差异无统计学意义(P>0.05)。结论:姜黄素具有较好的抑制肿瘤生长的效果,通过抑制Erk1/2的磷酸化,进而抑制人肾癌细胞786-O在裸鼠体内增殖。

Objective： To investigate the inhibitory effect of curcumin on 786-O cells and explore the potential mechanisms. Methods： Nude mice were randomly divided into two groups. Human kidney cancer cells 786-O were inoculated in nude mice. Intervention group mice were treated with curcumin and the control group mice were treated with PBS. The inhibition rate of tumor in the intervention group was determined. p-Erk1/2 and p-Akt expression was detected using Western blot and immunohistochemistry. Results： The average weight of the tumor of nude mice was（1.03±0.17）g in the intervention group and（2.46±0.48）g in the control group, the difference was significant（P=0.02）. The tumor inhibition rate of mice treated with curcumin was 58.13%. Western blot and immunohistochemical staining showed that the phosphorylation level of Erk1/2 in intervention group was significantly lower than that in the control group（P0.01）, no significantly difference was observed in the expression of Erk1/2, Akt and p-Akt in the two groups（P0.05）. Conclusion： The results of this study show that curcumin can inhibit the growth of tumor in vivo and inhibit the phosphorylation of Erk1/2 and inhibit the proliferation of human renal carcinoma cell line 786-O in nude mice.