miR-224-3p inhibits autophagy in cervical cancer cells by targeting FIP200

Sci Rep. 2016 Sep 12:6:33229. doi: 10.1038/srep33229.

Abstract

Cervical cancer (CC) is a malignant solid tumor, which is one of the main causes of morbidity and mortality in women. Persistent High-risk human papillomavirus (hrHPV) infection is closely related to cervical cancer and autophagy has been suggested to inhibit viral infections. miRNAs have been reported to regulate autophagy in many solid tumors with many studies implicating miR-224-3p in the regulation of autophagy. In this study, we performed a miRNA microarray analysis on CC tissues and found that a large number of miRNAs with differential expressions in hrHPV-infected tissues. We identified miR-224-3p as a candidate miRNA selectively up regulated in HPV-infected tissues and cell lines. Further analysis revealed that miR-224-3p regulates autophagy in cervical cancer tissues and cell lines. While the overexpression of miR-224-3p inhibits autophagy in HPV-infected cells, knocking down endogenous miR-224-3p increases autophagy activity in the same cells. In addition, we found that miR-224-3p directly inhibits the expression of autophagy related gene, FAK family-interacting protein of 200 kDa (FIP200). In summary, we found that miR-224-3p regulates autophagy in hrHPV-induced cervical cancer cells through targeting FIP200 expression.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • 3' Untranslated Regions
  • Autophagy*
  • Autophagy-Related Proteins
  • Base Sequence
  • Binding Sites
  • Female
  • Gene Expression
  • Gene Expression Regulation, Neoplastic
  • HeLa Cells
  • Humans
  • MicroRNAs / physiology*
  • Papillomavirus Infections / genetics*
  • Papillomavirus Infections / metabolism
  • Papillomavirus Infections / virology
  • Protein-Tyrosine Kinases / genetics*
  • Protein-Tyrosine Kinases / metabolism
  • RNA Interference
  • Uterine Cervical Neoplasms / genetics*
  • Uterine Cervical Neoplasms / metabolism
  • Uterine Cervical Neoplasms / virology

Substances

  • 3' Untranslated Regions
  • Autophagy-Related Proteins
  • MIRN224 microRNA, human
  • MicroRNAs
  • RB1CC1 protein, human
  • Protein-Tyrosine Kinases