南方医科大学学报 ›› 2016, Vol. 36 ›› Issue (11): 1482-.

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逆转录病毒介导shRNA抑制Mig-7基因对人肝癌细胞血管生成拟态及体外侵袭转移的抑制作用

屈波,盛冠男,余飞,陈冠男,吕琪,毛中鹏,郭龙,吕毅   

  • 出版日期:2016-11-20 发布日期:2016-11-20

Inhibitory effect of Mig-7 silencing by retrovirus-mediated shRNA on vasculogenic mimicry, invasion and metastasis of human hepatocellular carcinoma cells in vitro

  • Online:2016-11-20 Published:2016-11-20

摘要: 目的探讨逆转录病毒介导的短发夹RNA(shRNA)干扰迁移诱导基因7(Mig-7)对肝细胞癌(HCC)细胞血管生成拟态 (VM)形成及体外侵袭转移能力的影响。方法设计2条Mig-7 mRNA寡核苷酸序列(Mig-7 shRNA-1,Mig-7 shRNA-2)和1条 作为负对照的无关序列(Mig-7 shRNA-N)。构建Mig-7shRNA 逆转录病毒表达载体质粒,并将要接受转染的人肝癌细胞 MHCC-97H分为6组:转染Mig-7 shRNA-1组;转染Mig-7 shRNA-2组;转染Mig-7 shRNA-N组;转染空载质粒组(Vector);重 组人血管内皮抑素(ES,商品名:恩度)组;MHCC-97H细胞对照组(Control)。半定量PCR、Western blot检测其对Mig-7表达的 影响;三维细胞培养观察其对VM形成的影响;细胞间粘附实验、Transwell侵袭实验及迁移实验观察其对细胞粘附、侵袭及迁移 能力的影响。结果转染后,Mig-7 shRNA-1组与Mig-7 shRNA-2组中Mig-7 mRNA与蛋白的表达、MHCC-97H细胞形成VM 能力、细胞侵袭、迁移能力明显减低(P<0.05),细胞间粘附能力明显增加(P<0.05);Mig-7 shRNA-N 组、Vector 组、ES 组中 MHCC-97H细胞Mig-7的表达、VM形成、细胞间粘附、迁移、侵袭能力较MHCC-97H细胞组均无明显变化。结论逆转录病毒 介导的shRNA能够有效下调Mig-7的表达并明显抑制HCC细胞VM形成能力及侵袭转移能力,增加细胞间的粘附作用;ES对 HCC细胞的Mig-7表达、VM形成、侵袭转移及粘附能力无明显影响。

Abstract: Objective To explore the inhibitory effect of migration-inducing gene 7 (Mig-7) gene silencing induced by retroviral-mediated small hairpin RNA (shRNA) on vasculogenic mimicry (VM), invasion and metastasis of human hepatocellular carcinoma (HCC) cells in vitro. Methods Two target sequences (Mig-7 shRNA-1 and Mig-7 shRNA-2) and one negative control sequence (Mig-7 shRNA-N) were synthesized. The recombinant retroviral vectors carrying Mig-7 shRNA were constructed, and HCC cell line MHCC-97H were transfected with Mig-7 shRNA-1, Mig-7 shRNA-2, Mig-7 shRNA-N, or the empty vector, or treated with 125 μg/mL recombinant human endostatin (ES). Mig-7 expression in the treated cells was detected using semi-quantitative PCR and Western blotting. The inhibitory effect of Mig-7 silencing on VM formation was investigated in a 3-dimensional cell culture system; the changes in cell adhesion, invasion and migration were assessed with intercellular adhesion assay, Transwell invasion assay and Transwell migration assay, respectively. Results The expression of Mig-7 at both mRNA and protein levels decreased significantly, VM formation, invasion and metastasis were suppressed, while intercellular adhesion increased significantly in MHCC-97H cells in Mig-7 shRNA-1 and Mig-7 shRNA-2 groups (P< 0.05); such changes were not observed in cells transfected with Mig-7 shRNA-N or the empty vector, nor in cells treated with ES. Conclusions Mig-7 silencing by retroviral-mediated shRNA significantly inhibits VM formation, invasion and metastasis and increases the intercellular adhesion of the HCC cells, while ES does not have such inhibitory effects.