山东大学学报(医学版) ›› 2017, Vol. 55 ›› Issue (9): 31-35.doi: 10.6040/j.issn.1671-7554.0.2016.1604
赵作辉1,2,李翠玲2,王道光2,王风芹2,曲宏懿1,丁森泰3,巩晶2,吕家驹3,杨静华2
ZHAO Zuohui1,2, LI Cuiling2, WANG Daoguang2, WANG Fengqin2, QU Hongyi1, DING Sentai3, GONG Jing2, LÜ Jiaju3, YANG Jinghua2
摘要: 目的 探讨沉默信息调节因子2-相关酶3(SIRT 3)对肾透明细胞癌细胞系786-O中锰型超氧化物歧化酶(MnSOD)的去乙酰化作用及其对786-O细胞增殖、凋亡的影响。 方法 Western blotting和免疫共沉淀(IP)测定786-O中MnSOD乙酰化的水平;MnSOD酶活性试剂盒、四甲基偶氮唑盐(MTT)和Hoechst荧光染色分别检测肾癌细胞中MnSOD酶活性、细胞增殖和凋亡。 结果 与空白载体(pcDNA3.0)相比,SIRT 3(转染pcDNA3.0-sirt3)使MnSOD乙酰化水平由1.29±0.16降低为0.74±0.07(t=7.21, P<0.001),其酶活性由(1.47±0.17)U/mg增加至(2.53±0.31)U/mg(t=6.70, P<0.001)、细胞增殖率由(25.28±5.75)%增加至(48.86±7.47)%(t=5.60, P<0.001),而细胞凋亡率由(4.53±0.51)%变为(4.45±0.59)%,差异无统计学意义(t=0.24, P=0.82)。 结论 肾透明细胞癌786-O中MnSOD的去乙酰化增强其细胞增殖能力,MnSOD或其乙酰化可能是肾透明细胞癌治疗的一个潜在靶点。
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