网络首发:2014-07-20,
纸质出版:2014
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miR-103通过抑制FBW7的表达促进肝癌细胞增殖[J]. 中山大学学报(医学科学版), 2014,35(4).
miR-103 Promotes Hepatoma Cell Proliferation Through Inhibiting FBW7[J]. Journal of Sun Yat-sen University (Medical Sciences), 2014, 35(4).
摘 要: 【目的】 研究miR-103对肝癌细胞增殖功能的影响及其作用机制。【方法】 Real time PCR方法检测miR-103在肝癌组织和细胞中的表达。将miR-103inhibitor转染到肝癌细胞中,分为实验组(转染miR-103 inhibitor)和对照组(转染Negative Control),通过MTT实验检测肝癌细胞的增殖变化。Realtime PCR和Western blotting检测转染miR-103 mimics后肝癌细胞中FBW7 mRNA和蛋白的表达变化。通过重荧光素酶报告基因实验检测转染miR-103mimics 或inhibitor后FBW7-3’UTR活性的变化。【结果】 Real time PCR结果显示miR-103在肝癌组织和HepG2 细胞系中均高于癌旁组织和LO2肝细胞系(P< 0.05)。MTT实验结果显示,转染miR-103 inhibitor实验组肝癌细胞的存活细胞数低于对照组,差异有统计学意义(P < 0.05)。 Realtime PCR 和Western blotting结果显示,转染miR-103 mimics实验组肝癌细胞中FBW7的mRNA和蛋白表达水平都低于对照组.重荧光素酶报告基因实验结果显示,与对照组相比,转染miR-103mimics的实验组中FBW7-3’UTR报告基因活性显著降低(P < 0.05);与对照组相比,转染miR-103 inhibitor的实验组中FBW7-3’UTR活性显著升高(P< 0.05)。进一步实验发现,转染FBW7后能显著下调由miR-103 mimics所引起的细胞增殖作用。【结论】 miR-103可以通过抑制FBW7的表达来促进肝癌细胞增殖。
1.Department of Biochemistry and Molecular Biology, Fenyang College of ShanxiMedical University, Fenyang 032200, China; 2. Department of Pharmacology, Fenyang College of Shanxi Medical University,Fenyang 032200, China; 3. Department of Pathophysiology, Fenyang College of ShanxiMedical University, Fenyang 032200, China) Abstract:【Objective】 To investigate the effect of miR-103on proliferation of hepatoma cells and its mechanism. 【Methods】 The expression ofmiR-103 was detected in hepatoma tissues and cells by real-time PCR. The effect of miR-103 inhibitoron proliferation of hepatoma cells was measured using MTT assay. The mRNA and proteinlevels of FBW7 were measured by real time PCR and Western blotting analysis whenHepG2 cells were transfected with miR-103mimics.The FBW7-3′UTR activity was detected by luciferase reporter gene assaywhen HepG2 cells were transfected with miR-103mimics (orinhibitor). 【Results】 miR-103 was high expression in hepatomatissues and HepG2 cell line compared with adjacent tissues and LO2 cell line. Comparedwith the control group, the number of viable cells of hepatoma cells was decreasedwhen HepG2 cells were treated with miR-103 inhibitor. Comparedwith the control group, the mRNA and protein levels of FBW7 were significantly decreasedwhen HepG2 cells were treated with miR-103 mimics. Comparedwith the control group, the FBW7-3’UTRactivity was significantly decreased (or increased) when HepG2 cells were treatedwith miR-103 mimics (or inhibitor). Moreover, we found thatthe effect of miR-103mimics on cell proliferation was significantlyabrogated by overexpression of FBW7. 【Conclusion】 MiR-103was able to promote proliferation of hepatoma cells through targeting FBW7 mRNA3’UTR.
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