DNA损伤检测点介质1和P53结合蛋白1在人食管癌细胞系TE-1.TE-13.Eca109中的表达及意义

目的 研究DNA损伤检测点介质1(MDC1)和p53结合蛋白1(53BP1)在人食管癌细胞系中的表达及意义.方法 采用半定量RT-PCR、免疫细胞化学法、间接免疫荧光法和Western blotting检测MDC1、53BP1mRNA和蛋白在人食管癌细胞系TE-1.TE-13.Eca109的表达水平.结果 RT-PCR结果显示MDC1、53BP1mRNA在所检测的人食管癌细胞系中均有表达;免疫细胞化学法、间接免疫荧光法和Western blotting均在人食管癌细胞系中检测到MDC1、53BP1的蛋白表达.结论 首次证实了MDC1、53BP1在食管癌细胞系中的表达.推测MDC1、53BP1可能和食管癌细胞的放射敏感性有关.

Expression of DNA damage checkpoint mediator 1 and p53-binding protein 1 in human esophageal cancer cell lines TE-1,TE-13,and Eca109

Objective To observe the expression of DNA damage checkpoint mediator 1 (MDC1) and p53-binding protein 1 (53BP1) at both mRNA and protein levels and their significance in different human esophageal cancer cell lines. Methods In 3 human esophageal carcinoma cell lines, TE-1, TE-13 and Eca109 cells, the expressions of MDC1 and 53BP1 mRNA were detected with RT-PCR, and MDC1 and 53BP1 protein expressions were measured with immunohistochemistry, indirect immunofluorescence and Western blotting, respectively. Results and Conclusions MDC1 and 53BP1 expressions were observed for the first time in human esophageal carcinoma cell lines TE-1,TE-13 and Eca109 cells, at both the mRNA and protein levels. The expressions of MDC1 and 53BP1 proteins may be implicated in the radiosensitivity of human esophageal carcinoma.