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Published in: Child's Nervous System 12/2013

01-12-2013 | Original Paper

Isolation of tumor spheres and mesenchymal stem-like cells from a single primitive neuroectodermal tumor specimen

Authors: Jiyong Kwak, Hye-Jin Shin, Se-Hoon Kim, Jin-Kyoung Shim, Ji-Hyun Lee, Yong-Min Huh, Eui-Hyun Kim, Eun-Kyung Park, Jong Hee Chang, Sun Ho Kim, Yong-Kil Hong, Dong-Seok Kim, Su-Jae Lee, Seok-Gu Kang

Published in: Child's Nervous System | Issue 12/2013

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Abstract

Purpose

It has been reported that cancer stem cells (CSCs) can be isolated from primitive neuroectodermal tumor (PNET) specimens. Moreover, mesenchymal stem-like cells (MSLCs) have been isolated from Korean glioma specimens. Here, we tested whether tumor spheres and MSLCs can be simultaneously isolated from a single PNET specimen, a question that has not been addressed.

Methods

We isolated single-cell suspensions from PNET specimens, then cultured these cells using methods for MSLCs or CSCs. Cultured cells were analyzed for surface markers of CSCs using immunocytochemistry and for surface markers of bone marrow-derived mesenchymal stem cells (BM-MSCs) using fluorescence-activated cell sorting (FACS). Tumor spheres were exposed to neural differentiation conditions, and MSLCs were exposed to mesenchymal differentiation conditions. Possible locations of MSLCs within PNET specimens were determined by immunofluorescence analysis of tumor sections.

Results

Cells similar to tumor spheres and MSLCs were independently isolated from one of two PNET specimens. Spheroid cells, termed PNET spheres, were positive for CD133 and nestin, and negative for musashi and podoplanin. PNET spheres were capable of differentiation into immature neural cells and astrocytes, but not oligodendrocytes or mature neural cells. FACS analysis revealed that adherent cells isolated from the same PNET specimen, termed PNET-MSLCs, had surface markers similar to BM-MSCs. These cells were capable of mesenchymal differentiation. Immunofluorescence labeling indicated that some CD105+ cells might be closely related to endothelial cells and pericytes.

Conclusion

We showed that both tumor spheres and MSLCs can be isolated from the same PNET specimen. PNET-MSLCs occupied a niche in the vicinity of the vasculature and could be a source of stroma for PNETs.
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Metadata
Title
Isolation of tumor spheres and mesenchymal stem-like cells from a single primitive neuroectodermal tumor specimen
Authors
Jiyong Kwak
Hye-Jin Shin
Se-Hoon Kim
Jin-Kyoung Shim
Ji-Hyun Lee
Yong-Min Huh
Eui-Hyun Kim
Eun-Kyung Park
Jong Hee Chang
Sun Ho Kim
Yong-Kil Hong
Dong-Seok Kim
Su-Jae Lee
Seok-Gu Kang
Publication date
01-12-2013
Publisher
Springer Berlin Heidelberg
Published in
Child's Nervous System / Issue 12/2013
Print ISSN: 0256-7040
Electronic ISSN: 1433-0350
DOI
https://doi.org/10.1007/s00381-013-2201-x

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