ATAD2对人胶质瘤细胞系转移及上皮间质转换的影响

目的探讨三磷酸腺苷酶家族蛋白2(ATAD2)对人胶质瘤细胞的影响。方法用real-time PCR及Western blot检测ATAD2在人胶质瘤细胞系U87MG、U251和正常人星形胶质细胞的表达。U87MG和U251分为对照组(control)、脂质体对照组(mock)、ATAD2 siRNA(转染特异性siRNA)和ATAD2 overexpression(过表达ATAD2)4组,MTT法、Transwell实验观察细胞增殖和侵袭迁移。Western blot检测上皮间质转换标志蛋白上皮钙黏素、神经钙黏素和波形蛋白的表达。结果 U87MG和U251细胞ATAD2高表达。与对照相比,ATAD2 siRNA抑制U87MG和U251细胞增殖、侵袭、迁移、神经钙黏素及波形蛋白表达,促进上皮钙黏素表达(P0.05);ATAD2 overexpression促进细胞增殖、侵袭、迁移、神经钙黏素和波形蛋白表达,降低上皮钙黏素表达(P0.05)。结论 ATAD2可能通过调节上皮间充质转换进程参与人胶质瘤细胞转移。

Effect of ATAD2 on metastasisand epithelial-mesenchymal transition of human glioblastoma cell lines

Objective To analyze the effect of ATAD2 on glioma cell lines.Methods ATAD2 level in U87MG, U251 and normal human astrocytes was detected by RT-PCR and Western blot.U87MG and U251 cells were divided into four groups: control, mock (lipofection control), ATAD2 siRNA (transfected with ATAD2 siRNA) and ATAD2 overexpression (transfected with ATAD2).Cell proliferation, migration and invasion were respectively measured by MTT and Transwell assay.The level of E-cadherin, N-cadherin and Vimentin was measured by Western blot.Results ATAD2 was highly expressed in U87MG and U251 cells.Compared with control, cell proliferation, invasion, migration, N-cadherin and Vimentin expression were decreased by ATAD2 siRNA, while they were promoted by ATAD2 overexpression (P<0.05).E-cadherin expression was upregulated by ATAD2 siRNA and it was inhibited by ATAD2 overexpression (P<0.05).Conclusions ATAD2 participants in human glioma cells metastasis via epithelial-mesenchymal transition (EMT).