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目的 探讨沉默解聚素-金属蛋白酶17(ADAM17)基因的表达对HT29结肠癌细胞增殖和凋亡的抑制作用及其可能机制.方法 将HT29结肠癌细胞分为干扰组、阴性对照组和空白对照组,干扰组细胞转染重组慢病毒载体以沉默ADAM17基因的表达,阴性对照组细胞转染阴性对照重组慢病毒载体,空白对照组细胞加入等量的PBS溶液.采用实时荧光定量PCR法(real-time PCR)检测ADAM17 mRNA的表达,采用Western blot法检测ADAM17、半胱氨酸天冬氨酸蛋白酶-3(caspase3)、磷酸化蛋白激酶B(P-Akt)、蛋白激酶B(Akt)、磷酸化糖原合成酶激酶-3β(P-GSK3β)及糖原合成酶激酶-3β(GSK3β)蛋白的表达,采用3-(4, 5-二甲基噻唑-2)-2, 5-二苯基四氮唑溴盐(MTT)法检测细胞增殖能力的变化,采用Annexin-V-FITC/PI试剂盒检测细胞凋亡情况.结果 与阴性对照组和空白对照组比较,干扰组细胞中ADAM17 mRNA及其蛋白的表达水平均较低,同时点(培养24、48及72 h)的吸光度值(A值)也较低,细胞凋亡率较高,caspase3蛋白的表达水平较高,P-Akt和P-GSK3β 蛋白的表达水平均较低,差异均有统计学意义(P<0.05). 结论 ADAM17基因沉默可能通过抑制Akt/GSK3β 通路的激活,发挥抑制细胞增殖和诱导细胞凋亡的作用.“,”Objective To investigate the inhibition effect of silence of a disintegrin and metalloproteinase 17 (ADAM17) gene on proliferation and apoptosis of HT29 colon cancer cells and its possible mechanism. Methods HT29 cells were divided into 3 groups: cells of interference group were transfected with recombinant lentivirus vector, cells of negative control group were transfected with negative recombinant lentivirus vector, and cells of blank control group were treated with PBS. The expression of ADAM17 mRNA was detected by real-time PCR, the expressions of ADAM17 protein, caspase3, protein kinase B (Akt), glycogen synthase kinase-3β (GSK3β), phospho-protein kinase B (P-Akt), phospho-glycogen synthase kinase-3β (P-GSK3β) protein were detected by Western blot method, the cell proliferation was detected by MTT assay, and the apoptosis rate was detected by Annexin V-FITC/PI cell death detection kit. Results Compared with the control group and the negative control group, the interference group was related to low expressions of ADAM17 mRNA and its protein, low optical density value at the same time point (24, 48, and 72 h), high apoptosis rate, high expression level of caspase3 protein, but low expression levels of P-Akt and P-GSK3β protein (P<0.05). Conclusion Silent ADAM17 gene could significantly induces apoptosis and inhibits the proliferation of HT29 cells, which maybe via inhibiting Akt/GSK3β signaling pathway.