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  • Title: MiR-5692a promotes the invasion and metastasis of hepatocellular carcinoma via MMP9.
    Author: Sun SJ, Wang N, Sun ZW, Chen J, Cui HW.
    Journal: Eur Rev Med Pharmacol Sci; 2018 Aug; 22(15):4869-4878. PubMed ID: 30070322.
    Abstract:
    OBJECTIVE: To investigate the role of miR-5692a in hepatocellular carcinoma (HCC), and to further study the relationship between miR-5692a expression and clinical pathology as well as the prognosis of HCC. PATIENTS AND METHODS: The expression level of miR-5692a in 96 pairs of HCC tissues and para-cancerous tissues were detected by quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR). The relationship between miR-5692a and pathological indicators as well as the prognosis of HCC was analyzed by Kaplan-Meier curves. For in vitro experiments, qRT-PCR was used to detect the expression of miR-5692a in HCC cell lines. Furthermore, small interference sequence of miR-5692a was constructed. Cellular functions of HCC cells after miR-5692a knockdown were detected by cell counting kit-8 (CCK-8), colony formation and transwell assay, respectively. The underlying mechanism of miR-5692a in regulating the development of HCC was detected by Western blot. RESULTS: MiR-5692a was overexpressed in HCC tissues than that of para-cancerous tissues. HCC patients with higher miR-5692a expression exhibited a higher prevalence of lymph node metastasis and distant metastasis, as well as lower overall survival than those patients with lower level of miR-5692a expression. In vitro experiments demonstrated that miR-5692a knockdown resulted in decreased proliferation and invasion, and increased apoptosis of HCC cells. Western blot results revealed that EMT-related (epithelial-mesenchymal transition) genes, including N-cadherin, Vimentin, β-catenin and MMP9, were downregulated after miR-5692a knockdown. Rescue experiments indicated that miR-5692a promoted malignant progression of HCC via regulating MMP9. CONCLUSIONS: MiR-5692a was overexpressed in HCC patients, which was remarkably correlated with HCC stage, distant metastasis and poor prognosis. In addition, miR-5692a promoted the malignant progression of HCC via regulating MMP9.
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