luminal A型乳腺癌组织中长链非编码RNA ENST00000460164的表达及对细胞周期的影响

目的明确lncRNA-ENST00000460164在人luminal A型乳腺癌组织中的表达及作用。方法用RT-q PCR检测ENST00000460164在17例配对的luminal A型乳腺癌及癌旁组织中的表达。将pll3.7-ENST00000460164-shRNA及pll3.7空载体转染MCF-7细胞,用流式细胞计量技术和Western blot检测转染后MCF-7细胞周期及其关键蛋白cyclin D1和P16INK4A的表达。结果长链非编码RNA ENST00000460164在luminal A型乳腺癌组织中呈高表达趋势;在MCF-7细胞中敲低ENST0000460164后,G1期明显延长,S期明显缩短(P0.05);G1期关键调控蛋白cyclin D1表达水平明显降低,P16INK4A表达明显上调(P0.05)。结论 ENST00000460164在luminal A型乳腺癌组织中呈高表达状态;ENST00000460164可能通过调控cyclin D1或者P16INK4A的表达改变细胞周期。

Expression level of lncRNA-ENST00000460164 in luminal A breast cancer and its effect on cell cycle

Objective To find the expression level and the role of ENST00000460164 in luminal A breast cancer.Methods The expression level of ENST00000460164 in breast cancer tissues was detected by RT-qPCR.pll3.7-ENST00000460164-shRNA and empty vector,pll3.7,were transfected into MCF-7 cells.Cell cycle was measured by flow cytometry.Western blot was used to detect the expression of P16INK4A and cyclinD1.Results ENST00000460164 was highly expressed in luminal A breast cancer tissues as compared to the adjacent non-cancer tissues.The knockdown of ENST00000460164 resulted in the G1 cell-cycle arrested,cyclin D1 downregulated and P16INK4A upregulated in MCF-7 cells.Conclusions ENST00000460164 is overexpressed in luminal A breast cancer.ENST00000460164 may control G1/S transition by regulating P16INK4A or cyclin D1 expression.