Upregulation of MiR-196a promotes cell proliferation by downregulating p27kip1 in laryngeal cancer

• Jin Cheng ^[1] ; Zhang Yi ^[1] ; Li Jiping ^[1]
  1. [1] Shanghai Jiao Tong University

     Shanghai Jiao Tong University

     China

     
• Localización: Biological Research, ISSN-e 0717-6287, ISSN 0716-9760, Nº. 49, 2016, 8 págs.
• Idioma: inglés
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• Resumen

  • Accumulating evidence has confirmed that miR-196a plays a critical role in tumorigenesis and tumor progression in a variety of cancers. It has been demonstrated that miR-196a is highly up-regulated in laryngeal cancer by miRNA profiling analysis. However, the functional mechanism of miR-196a in laryngeal cancer remains unclear. This study aims to explore the mechanism of miR-196a in laryngeal cancer Methods: In the present study, we conducted qPCR analysis of miR-196a expression in human laryngeal cancer and showed that miR-196a was overexpressed in tumor-derived samples and laryngeal cancer cell lines compared with matched normal controls. Further functional analysis of miR-196a demonstrated that the inhibition of miR-196a could inhibit laryngeal cell-cycle progression and proliferation in vitro. Luciferase reporter assay and western blot confirmed that miR-196a directly targeted p27kip1. Moreover, in order to investigate whether miR-196a regulated cell growth in laryngeal cancer cells by targeting p27kip1, rescue studies were performed in laryngeal cancer cells Results: Results showed that overexpression of p27kip1 rescue decreased cell proliferation caused by miR-196a inhibitors. A negative relation between miR-196a and p27kip1 expression in laryngeal cancer tissues were also noted by further analyses Conclusions: The present study showed that miR-196a was upregulated in laryngeal cancer and promoted cell proliferation by downregulating p27kip1 in laryngeal cancer. However, further studies are needed to verify this finding