OncoTargets and Therapy (Dec 2018)

MicroRNA-486-3p directly targets BIK and regulates apoptosis and invasion in colorectal cancer cells

  • Feng L,
  • Jing L,
  • Han J,
  • Wang G,
  • Liu Y,
  • Zhang X,
  • Wang Y,
  • Wang F,
  • Ma H,
  • Liu Y

Journal volume & issue
Vol. Volume 11
pp. 8791 – 8801

Abstract

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Li Feng,1 Li Jing,1 Jing Han,1 Guiying Wang,2 Yan Liu,1 Xue Zhang,1 Yudong Wang,1 Feifei Wang,2 Hongqing Ma,2 Yibing Liu1 1Department of Medical Oncology, Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China; 2Second Department of General Surgery, Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China Background: MicroRNAs influence almost every genetic pathway and are involved in colorectal cancer (CRC). However, the biological role of miR486-3p in CRC remains to be elucidated. Methods: In this study, miR486-3p expression in CRC cell lines and normal colonic epithelial cells was determined. After miR486-3p mimic, inhibitor, and BIK siRNA transfection, cell proliferation, apoptosis, and migration were examined. Furthermore, the target of miR486-3p was identified by luciferase-reporter assay and underlying molecular mechanisms studied. Results: The results revealed that miR486-3p was significantly upregulated in CRC compared with normal colonic epithelial cells, whereas BIK expression was remarkably downregulated in CRC cells. MTT assays demonstrated that suppression of miR486-3p expression reduced CRC cell proliferation, whereas elevated miR486-3p or BIK silencing induced cell proliferation. Wound-healing assays and transwell experiments revealed that both upregulation of miR486-3p and downregulation of BIK increased CRC cell migration and invasion ability. Moreover, bioinformatic target prediction identified BIK as a putative target of miR486-3p. Knockdown of miR486-3p was shown to upregulate BIK expression, whereas overexpression of miR486-3p suppressed the expression of BIK. Luciferase reporter assay results further confirmed this deduction. Conclusion: In conclusion, these findings suggest that miR486-3p is an oncogene in CRC. Gene therapy using miR486-3p inhibition may provide a new clue for CRC therapy. Keywords: colorectal cancer, miR486-3p, BIK, apoptosis, invasion

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