目的：探讨磷脂酶Cε1( PLCE1)基因抑制食管癌细胞凋亡的作用机制。方法选用人食管癌细胞株OE33和CP-C作为研究对象。采用qRT-PCR、Western blot法分别检测转染PLCE1 siRNA前、后食管癌细胞OE33和CP-C中PLCE1、p53 mRNA和蛋白水平的表达；甲基化特异性PCR重亚硫酸盐法检测p53启动子区甲基化状态；流式细胞仪检测细胞凋亡。结果食管癌细胞株OE33和CP-C均高表达PLCE1,抑制PLCE1表达后食管癌细胞CP-C中p53表达上调并促进p53去甲基化,细胞凋亡明显增加。结论 PLCE1通过促进p53启动子区甲基化抑制p53的表达,从而抑制食管癌细胞凋亡。%Aim To investigate the role of phospho-lipase C epsilon 1 ( PLCE1 ) in modulating the apoptot-ic mechanism in esophageal cancer ( Eca ) cells. Methods Eca cell lines, OE33 and CP-C cells were cultured to assess the expression of PLCE1 . siRNA suppress expression of PLCE1 . The expression of PLCE1 and p53 was evaluated by quantitative real time PCR and Western blot. Methylation analyses of p53 were performed by bisulfite conversion of genomic DNA. Apoptosis was assessed by flow cytometry. Results OE33 and CP-C cells expressed high levels of PLCE1 . Knockdown of PLCE1 markedly increased the expression and hypomethylation of p53 , and in-creased the frequency of apoptosis. Conclusion PLCE1 suppresses apoptosis of Eca cells via promoting p53 promoter methylation and inhibiting expression of p53 .
展开▼
