POU5F1 enhances the invasiveness of cancer stem-like cells in lung adenocarcinoma by upregulation of MMP-2 expression

PLoS One. 2013 Dec 30;8(12):e83373. doi: 10.1371/journal.pone.0083373. eCollection 2013.

Abstract

Lung cancer is the leading cause of cancer-related human deaths. Exploration of the mechanisms underlying the metastasis of cancer stem-like cells (CSLCs) will open new avenues in lung cancer diagnosis and therapy. Here, we demonstrated that CSLCs-derived from lung adenocarcinoma (LAC) cells displayed highly invasive and migratory capabilities via expressing high levels of POU5F1 and MMP-2. We found that POU5F1 directly regulated MMP-2 transcription via interaction with the promoter of MMP-2. POU5F1 knockdown in LACSLCs reduced MMP-2 protein abundance, leading to inhibition of the cell invasion, migration and tumorigenesis potentials of LAC cells. Clinically, aberrantly high expressions of POU5F1 and MMP-2 were inversely correlated with the survival of LAC patients, and the double-positive POU5F1 and MMP-2 showed the worst prediction for the patient's poor survival. These results indicate that POU5F1 can bind to the MMP-2 promoter for the degradation of surrounding extracellular matrix, and therefore promote invasive and migratory capabilities of LACSLCs. Moreover, our data implicate that the pathological detection of the double-positive expressions for POU5F1 and MMP-2 will be useful as diagnostic and prognostic biomarkers in LAC to advance anti-metastasis therapy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenocarcinoma / genetics*
  • Adenocarcinoma / metabolism
  • Adenocarcinoma / mortality
  • Adenocarcinoma / pathology*
  • Adenocarcinoma of Lung
  • Animals
  • Cell Line, Tumor
  • Cell Movement / genetics
  • Cell Transformation, Neoplastic / genetics
  • Disease Models, Animal
  • Enzyme Activation
  • Gene Expression Regulation, Neoplastic*
  • Gene Knockdown Techniques
  • Heterografts
  • Humans
  • Lung Neoplasms / genetics*
  • Lung Neoplasms / metabolism
  • Lung Neoplasms / mortality
  • Lung Neoplasms / pathology*
  • Male
  • Matrix Metalloproteinase 2 / genetics*
  • Matrix Metalloproteinase 2 / metabolism
  • Mice
  • Neoplasm Invasiveness
  • Neoplastic Stem Cells / metabolism*
  • Octamer Transcription Factor-3 / genetics*
  • Octamer Transcription Factor-3 / metabolism
  • Prognosis

Substances

  • Octamer Transcription Factor-3
  • POU5F1 protein, human
  • Matrix Metalloproteinase 2

Grants and funding

This work was supported by grants from the National Basic Research Program of China (973 Program, Grant No.2010CB529403), National Natural Science Foundations of China (Grant No.81272598) and China Postdoctoral Science Foundation (Grant No.2012T50852). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.