MicroRNA-214 suppresses oncogenesis and exerts impact on prognosis by targeting PDRG1 in bladder cancer

PLoS One. 2015 Feb 23;10(2):e0118086. doi: 10.1371/journal.pone.0118086. eCollection 2015.

Abstract

MicroRNA-214 (miR-214) has been reported to be dysregulated in human bladder cancer tissues. We aimed to investigate the clinical correlation, biological significance and molecular network of miR-214 in bladder cancer. Our results showed miR-214 was down-regulated in bladder cancer tissues and significantly associated with tumor stage, lymph node status, grade, multifocality, history of non-muscle-invasive bladder cancer (NMIBC). Moreover, miR-214 could serve as an independent factor of recurrence-free survival (RFS) and overall survival (OS) for patients with muscle-invasive bladder cancer (MIBC). Restoration of miR-214 expression in bladder cancer cell lines inhibited cell proliferation, migration, invasion and markedly promoted apoptosis. Dual-luciferase reporter assay recognized PDRG1 as direct downstream target gene of miR-214. PDRG1 was significantly increased in tumors low of miR-214 and knockdown of PDRG1 mimicked the effects of miR-214 overexpression. Our findings manifest that miR-214 could exert tumor-suppressive effects in bladder cancer by directly down-regulating oncogene PDRG1 and suggest an appealing novel indicator for prognostic and therapeutic intervention of bladder cancer.

Publication types

  • Research Support, Non-U.S. Gov't
  • Retracted Publication

MeSH terms

  • Carcinogenesis / genetics*
  • Carcinogenesis / pathology
  • Cell Line
  • Cell Line, Tumor
  • Cell Movement / genetics
  • Cell Proliferation / genetics
  • DNA-Binding Proteins / genetics*
  • Female
  • Gene Expression Regulation, Neoplastic / genetics
  • Humans
  • Male
  • MicroRNAs / genetics*
  • Middle Aged
  • Neoplasm Invasiveness / genetics
  • Neoplasm Invasiveness / pathology
  • Prognosis
  • Urinary Bladder / metabolism
  • Urinary Bladder Neoplasms / genetics*
  • Urinary Bladder Neoplasms / pathology

Substances

  • DNA-Binding Proteins
  • MIRN214 microRNA, human
  • MicroRNAs
  • PDRG1 protein, human

Grant support

This study received financial support from the National Natural Science Foundation of China (http://www.nsfc.gov.cn/) to CW (No. 81271916) and the Natural Science Foundation of Shandong Province (http://www.sdnsf.gov.cn/portal/) to XZ (ZR2013HQ063). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.