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MiR-489 suppresses tumor growth and invasion by targeting HDAC7 in colorectal cancer

  • S. Gao [3] ; H. Liu [3] ; S. Hou [3] ; L. Wu [1] ; Z. Yang [1] ; J. Shen [2] ; L. Zhou [1] ; S.-S. Zheng [1] ; B. Jiang [3]
    1. [1] Zhejiang University

      Zhejiang University

      China

    2. [2] Jingning County People's Hospital

      Jingning County People's Hospital

      China

    3. [3] The Third People’s Hospital of Shanxi Province, China
  • Localización: Clinical & translational oncology, ISSN 1699-048X, Vol. 20, Nº. 6 (June 2018), 2018, págs. 703-712
  • Idioma: inglés
  • Texto completo no disponible (Saber más ...)
  • Resumen
    • Purpose The expression of miR-489 is linked to tumor development and progression; nevertheless, its role in tumor growth and invasion of colorectal cancer (CRC) and the underlying mechanism has not been clarified.

      Experimental design We used quantitative RT-PCR to measure the expression of mature miR-489 in human colorectal tissues and the corresponding CRCs. Targets of miR-489 were predicted with TargetScan and substantiated by dual-luciferase reporter assay. Furthermore, we did in vitro and in vivo analysis with expression vectors and small interfering RNAs, to elucidate the precise role of miR-489 and its target gene histone deacetylase 7 (HDAC7) on cell proliferation, survival, and invasion.

      Results Compared to the corresponding non-tumor tissues, miR-489 was frequently downregulated in CRC. By Kaplan–Meier analysis, we found that lower CRC recurrence free survival years in the group with elevated miR-489 expression than those with lower miR-489 expression. In addition, we examined that miR-489 obviously inhibited the migratory and invasive capability in CRC. In further study, we found that miR-489 targets the 3′-UTR of the HDAC7 transcript and downregulates its expression, and HDAC7 expression promoted tumor cell proliferation and invasion. We demonstrated that miR-489 suppresses tumor invasion and metastasis in CRC by targeting HDAC7.

      Conclusions We identified that MiR-489 suppresses tumor growth and invasion in CRC by targeting HDAC7. The expression of miR-489 suggests CRC recurrence and metastasis, which shed crucial light on how miR-489 functions in CRC pathogenesis.


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