miR-25靶向RECK促进宫颈癌HeLa细胞的增殖

miR-25 promotes cell proliferation by targeting RECK in human cervical carcinoma He La cells

目的探讨微小RNA-25(miR-25)对宫颈癌He La细胞增殖活性的影响及其与逆向诱导的带Kazal基序的富含半胱氨酸蛋白(RECK)的靶向关系。方法构建pc DNATM6.2-GW-pre-miR-25、pmir GLO-野生型RECK(RECK-WT)和突变型RECK(RECK-MT)真核表达载体及miR-25抑制剂(anti-miR-25),采用荧光实时定量PCR(qRT-PCR)检测pre-miR-25和anti-miR-25在He La细胞中的转染效率,并采用MTT法分析miR-25对He La细胞增殖活性的影响,双萤光素酶报告基因、qRT-PCR和Western blot法检测miR-25与RECK靶向关系。结果测序结果显示pc DNATM6.2-GW-pre-miR-25、pmir GLO-RECK-WT和pmir GLO-RECK-MT重组载体构建成功,qRT-PCR提示pre-miR-25与anti-miR-25在He La细胞中具有良好的转染效率。MTT结果显示miR-25能够明显促进He La细胞的增殖。双萤光素酶报告基因检测显示共转染pre-miR-25与RECK-WT的He La细胞其萤光活性显著下降,同时qRT-PCR及Western blot也显示anti-miR-25在转录和转录后水平均能够显著增加He La细胞中RECK的表达。结论miR-25能够靶向RECK,促进宫颈癌He La细胞的增殖。

Objective To investigate the effect of miR-25 on the proliferation of human cervical carcinoma HeLa cells and its association with reversion-inducing cysteine-rich protein with Kazal motifs （RECK）. Methods The recombinant plasmids of pcDNATM6.2-GW-pre-miR-25, pmirGLO-RECK-WT, pmirGLO-RECK-MT and anti-miR-25 were constructed, and their transfection efficiencies into HeLa cells were identified by real-time quantitative PCR （qRT-PCR）. The potential proliferation- stimulating function of miR-25 was analyzed by MTT assay in HeLa cells. Furthermore, the target effect of miR-25 on the RECK was determined by dual-luciferase reporter assay system, qRT-PCR and Western blotting. Results Sequence analysis demonstrated that the recombinant plasmids of pcDNATM6. 2-GW-pre-miR-25 and pmirGLO-RECK-W-r, pmirGLO-RECK-MT were successfully constructed, and qRT-PCR revealed that the transfection efficiencies of pre-miR-25 and anti-miR-25 were desirable in HeLa cells. M＇I-I- assay showed that miR-25 over-expression promoted the proliferation of HeLa cells. In addition, the luciferase activity was significantly reduced in HeLa cells cotransfected with pre-miR-25 and RECK-WT. The qRT-PCR and Western blotting indicated that the expression level of RECK was up-regulated in HeLa cells transfected with anti-miR-25 at the transcriptional and posttranscriptional levels. Conclusion miR-25 could promote cell proliferation by targeting RECK in HeLa cells.