Elevation of miR-27b by HPV16 E7 inhibits PPARγ expression and promotes proliferation and invasion in cervical carcinoma cells

Int J Oncol. 2015 Nov;47(5):1759-66. doi: 10.3892/ijo.2015.3162. Epub 2015 Sep 14.

Abstract

MicroRNAs (miRNAs) have been reported to be involved in multiple biological pathways that can influence tumor progression and metastasis. High-risk human papillomavirus (HR-HPVs) is aetiologically correlated to cervical cancer. Recently, miRNAs were reported to be regulated by virus and play pivotal roles in HPV-related tumor progression. However, the underlying mechanism remains poorly understood. In the present study, we report that HPV16 E7 upregulated miR-27b to promote proliferation and invasion in cervical cancer. The results showed that PPARγ, as a target of miR-27b, played a significant role in suppressing cervical cancer progression by downregulating the sodium-hydrogen exchanger isoform 1 (NHE1). It was also shown that the inhibition of miR-27b diminished the ability of HPV16 E7 to suppress PPARγ or activate NHE1 expression. In addition, we observed high expression of miR-27b and NHE1, but low expression of PPARγ in HPV16-positive cervical cancer tissues. In summary, the present study revealed that miR-27b is upregulated by HPV16 E7 to inhibit PPARγ expression and promotes proliferation and invasion in cervical carcinoma cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carcinoma / genetics*
  • Carcinoma / pathology
  • Cation Transport Proteins / biosynthesis
  • Cation Transport Proteins / genetics*
  • Cell Proliferation / genetics
  • Female
  • Gene Expression Regulation, Neoplastic
  • Humans
  • MicroRNAs / biosynthesis*
  • MicroRNAs / metabolism
  • Neoplasm Invasiveness / genetics
  • PPAR gamma / biosynthesis
  • PPAR gamma / genetics*
  • Papillomavirus E7 Proteins / metabolism
  • Papillomavirus Infections / genetics
  • Papillomavirus Infections / pathology
  • Papillomavirus Infections / virology
  • Sodium-Hydrogen Exchanger 1
  • Sodium-Hydrogen Exchangers / biosynthesis
  • Sodium-Hydrogen Exchangers / genetics*
  • Uterine Cervical Neoplasms / genetics*
  • Uterine Cervical Neoplasms / pathology
  • Uterine Cervical Neoplasms / virology

Substances

  • Cation Transport Proteins
  • MIRN27 microRNA, human
  • MicroRNAs
  • PPAR gamma
  • Papillomavirus E7 Proteins
  • SLC9A1 protein, human
  • Sodium-Hydrogen Exchanger 1
  • Sodium-Hydrogen Exchangers
  • oncogene protein E7, Human papillomavirus type 16