摘要:目的探讨N-myc downstream regulated gene 4(NDRG4)对卵巢癌SKOV3细胞迁移和侵袭能力的影响及其分子机制。方法应用脂质体转染法将NDRG4过表达载体pcDNA3.1-NDRG4质粒(pcDNA3.1-NDRG4质粒组)和空白pcDNA3.1质粒(空白质粒组)转染至SKOV3细胞中。采用实时荧光定量PCR和Western blot法验证NDRG4过表达效果,应用transwell小室法检测细胞迁移和侵袭能力的变化,Western blot法检测卵巢癌细胞中上皮间质转化相关蛋白(E-cadherin、N-cadherin和Vimentin)以及Wnt/β-catenin信号通路相关蛋白(β-catenin和c-myc)的表达水平。结果转染48 h后,与空白质粒组比较,pcDNA3.1-NDRG4质粒组细胞迁移和侵袭能力均下降(P=0.006,P=0.023)。转染72 h后,与空白质粒组比较,pcDNA3.1-NDRG4质粒组E-cadherin表达水平上升(P=0.023),N-cadherin和Vimentin的表达水平均下降(P=0.013,P=0.021)。转染72 h后,与空白质粒组比较,pcDNA3.1-NDRG4质粒组β-catenin和c-myc的表达水平均下降(P=0.035,P=0.006)。结论NDRG4蛋白抑制卵巢癌细胞迁移和侵袭能力,并抑制上皮间质转化过程。该作用可能是通过抑制Wnt/β-catenin细胞信号通路实现。
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