Characterization of stem-like cells in mucoepidermoid tracheal paediatric tumor

PLoS One. 2014 Sep 17;9(9):e107712. doi: 10.1371/journal.pone.0107712. eCollection 2014.

Abstract

Stem cells contribute to regeneration of tissues and organs. Cells with stem cell-like properties have been identified in tumors from a variety of origins, but to our knowledge there are yet no reports on tumor-related stem cells in the human upper respiratory tract. In the present study, we show that a tracheal mucoepidermoid tumor biopsy obtained from a 6 year-old patient contained a subpopulation of cells with morphology, clonogenicity and surface markers that overlapped with bone marrow mesenchymal stromal cells (BM-MSCs). These cells, designated as MEi (mesenchymal stem cell-like mucoepidermoid tumor) cells, could be differentiated towards mesenchymal lineages both with and without induction, and formed spheroids in vitro. The MEi cells shared several multipotent characteristics with BM-MSCs. However, they displayed differences to BM-MSCs in growth kinectics and gene expression profiles relating to cancer pathways and tube development. Despite this, the MEi cells did not possess in vivo tumor-initiating capacity, as proven by the absence of growth in situ after localized injection in immunocompromised mice. Our results provide an initial characterization of benign tracheal cancer-derived niche cells. We believe that this report could be of importance to further understand tracheal cancer initiation and progression as well as therapeutic development.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Separation
  • Child
  • Female
  • Gene Expression Profiling
  • Genomics
  • Humans
  • Male
  • Mesenchymal Stem Cells / pathology
  • Mice
  • Mucoepidermoid Tumor / diagnosis
  • Mucoepidermoid Tumor / genetics
  • Mucoepidermoid Tumor / pathology*
  • Neoplastic Stem Cells / pathology*
  • Tracheal Neoplasms / diagnosis
  • Tracheal Neoplasms / genetics
  • Tracheal Neoplasms / pathology*

Grants and funding

This study was supported through ALF medicine (Stockholm County Council) application number 20110639 and the European Project FP7-NMP-2011-SMALL-5 Grant agreement number 280584. Megagrant of the Russian Ministry of Education and Science (Agreement No. 11.G34.31.0065). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.