Isolation of mesenchymal stem-like cells in meningioma specimens

Int J Oncol. 2013 Oct;43(4):1260-8. doi: 10.3892/ijo.2013.2053. Epub 2013 Aug 6.

Abstract

Cells resembling bone marrow mesenchymal stem cells (BM-MSCs) have been isolated from glioma specimens; however, little is known about the existence of mesenchymal stem-like cells (MSLCs) in meningioma. Here, we hypothesized that cells similar to BM-MSCs exist in meningioma specimens and sought to investigate whether these putative meningioma stroma MSLCs (MS-MSLCs) could be isolated. To this end, we cultured fresh meningioma specimens using the same protocols as used previously to isolate BM-MSC. Cultured cells were analyzed for surface markers associated with BM-MSCs by fluorescence-activated cell sorting (FACS) and candidate cells were exposed to mesenchymal differentiation conditions. Possible locations of MS-MSLCs were determined by immunohistochemical analysis of sections of meningioma specimens. Spindle-shaped and, adherent cells similar to BM-MSCs were isolated in 2 of 20 meningioma specimens. FACS analysis showed that the surface markers of MS-MSLCs were similar to those of BM-MSCs and the chosen cells demonstrated an ability to differentiate into osteogenic, adipogenic and chondrogenic cells. The tumorigenicity of MS-MSLCs was tested by injection of these cells into the brain of athymic nude mice; no tumors were subsequently discovered. Immunohistochemical analyses indicated that CD105+ cells were closely associated with endothelial cells and pericytes in meningioma specimens. Our results established for the first time that cells similar to BM-MSCs exist in meningioma specimens. These cells, termed MS-MSLCs, could be one component of the meningioma cellular microenvironment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adipogenesis / genetics
  • Animals
  • Antigens, CD / metabolism
  • Bone Marrow Cells / cytology*
  • Bone Marrow Cells / metabolism
  • Cell Differentiation / genetics*
  • Cell Separation
  • Cells, Cultured
  • Chondrogenesis / genetics
  • Endoglin
  • Flow Cytometry
  • Humans
  • Meningioma / genetics*
  • Meningioma / pathology
  • Mesenchymal Stem Cells / pathology*
  • Mice
  • Osteogenesis / genetics
  • Receptors, Cell Surface / metabolism

Substances

  • Antigens, CD
  • ENG protein, human
  • Endoglin
  • Receptors, Cell Surface