CD15 expression does not identify a phenotypically or genetically distinct glioblastoma population

Emma Kenney-Herbert, Talal Al-Mayhani, Sara G.M. Piccirillo, Joanna Fowler, Inmaculada Spiteri, Philip Jones, Colin Watts

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Recent research has focused on the hypothesis that the growth and regeneration of glioblastoma (GB) is sustained by a subpopulation of self-renewing stem-like cells. This has led to the prediction that molecular markers for cancer stem cells in GB may provide a treatment target. One candidate marker is CD15: we wanted to determine if CD15 represented a credible stemcell marker in GB.Wefirst demonstrated that CD15-positive (CD15+) cells were less proliferative than their CD15-negative (CD15–) counterparts in 10 patient GB tumors. Next we compared the proliferative activity of CD15+ and CD15–cells in vitro using tumor-initiating primary GB cell lines (TICs) and found no difference in proliferative behavior. Furthermore, TICs sorted for CD15+ and CD15– were not significantly different cytogenetically or in terms of gene expression profile. Sorted single CD15+ and CD15– cells were equally capable of reconstituting a heterogeneous population containing both CD15+ and CD15–cells over time, and both CD15+ and CD15–cells were able to generate tumors in vivo. No difference was found in the phenotypic or genomic behavior ofCD15+cellscomparedwithCD15–cells fromthesame patient. Moreover, we found that in vitro, cells were able to interconvert between the CD15+ and CD15– states. Our data challenge the utility of CD15 as a cancer stem cell marker.

Original languageEnglish (US)
Pages (from-to)821-831
Number of pages11
JournalStem Cells Translational Medicine
Volume4
Issue number7
DOIs
StatePublished - Jul 1 2015

Keywords

  • CD15
  • Cancer
  • Glioblastoma
  • Hierarchy
  • SSEA1
  • Stem cell

ASJC Scopus subject areas

  • Developmental Biology
  • Cell Biology

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