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Human Pancreatic Cancer Contains a Side Population Expressing Cancer Stem Cell-Associated and Prognostic Genes
In many types of cancers, a side population (SP) has been identified based on high efflux capacity, thereby enriching for chemoresistant cells as well as for candidate cancer stem cells (CSC). Here, we explored whether human pancreatic ductal adenocarcinoma (PDAC) contains a SP, and whether its gene...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3775803/ https://www.ncbi.nlm.nih.gov/pubmed/24069258 http://dx.doi.org/10.1371/journal.pone.0073968 |
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author | Van den broeck, Anke Vankelecom, Hugo Van Delm, Wouter Gremeaux, Lies Wouters, Jasper Allemeersch, Joke Govaere, Olivier Roskams, Tania Topal, Baki |
author_facet | Van den broeck, Anke Vankelecom, Hugo Van Delm, Wouter Gremeaux, Lies Wouters, Jasper Allemeersch, Joke Govaere, Olivier Roskams, Tania Topal, Baki |
author_sort | Van den broeck, Anke |
collection | PubMed |
description | In many types of cancers, a side population (SP) has been identified based on high efflux capacity, thereby enriching for chemoresistant cells as well as for candidate cancer stem cells (CSC). Here, we explored whether human pancreatic ductal adenocarcinoma (PDAC) contains a SP, and whether its gene expression profile is associated with chemoresistance, CSC and prognosis. After dispersion into single cells and incubation with Hoechst dye, we analyzed human PDAC resections specimens using flow cytometry (FACS). We identified a SP and main population (MP) in all human PDAC resection specimens (n = 52) analyzed, but detected immune (CD45(+)) and endothelial (CD31(+)) cells in this fraction together with tumor cells. The SP and MP cells, or more purified fractions depleted from CD31(+)/CD45(+) cells (pSP and pMP), were sorted by FACS and subjected to whole-genome expression analysis. This revealed upregulation of genes associated with therapy resistance and of markers identified before in putative pancreatic CSC. pSP gene signatures of 32 or 10 up- or downregulated genes were developed and tested for discriminatory competence between pSP and pMP in different sets of PDAC samples. The prognostic value of the pSP genes was validated in a large independent series of PDAC patients (n = 78) using nCounter analysis of expression (in tumor versus surrounding pancreatic tissue) and Cox regression for disease-free and overall survival. Of these genes, expression levels of ABCB1 and CXCR4 were correlated with worse patient survival. Thus, our study for the first time demonstrates that human PDAC contains a SP. This tumor subpopulation may represent a valuable therapeutic target given its chemoresistance- and CSC-associated gene expression characteristics with potential prognostic value. |
format | Online Article Text |
id | pubmed-3775803 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-37758032013-09-25 Human Pancreatic Cancer Contains a Side Population Expressing Cancer Stem Cell-Associated and Prognostic Genes Van den broeck, Anke Vankelecom, Hugo Van Delm, Wouter Gremeaux, Lies Wouters, Jasper Allemeersch, Joke Govaere, Olivier Roskams, Tania Topal, Baki PLoS One Research Article In many types of cancers, a side population (SP) has been identified based on high efflux capacity, thereby enriching for chemoresistant cells as well as for candidate cancer stem cells (CSC). Here, we explored whether human pancreatic ductal adenocarcinoma (PDAC) contains a SP, and whether its gene expression profile is associated with chemoresistance, CSC and prognosis. After dispersion into single cells and incubation with Hoechst dye, we analyzed human PDAC resections specimens using flow cytometry (FACS). We identified a SP and main population (MP) in all human PDAC resection specimens (n = 52) analyzed, but detected immune (CD45(+)) and endothelial (CD31(+)) cells in this fraction together with tumor cells. The SP and MP cells, or more purified fractions depleted from CD31(+)/CD45(+) cells (pSP and pMP), were sorted by FACS and subjected to whole-genome expression analysis. This revealed upregulation of genes associated with therapy resistance and of markers identified before in putative pancreatic CSC. pSP gene signatures of 32 or 10 up- or downregulated genes were developed and tested for discriminatory competence between pSP and pMP in different sets of PDAC samples. The prognostic value of the pSP genes was validated in a large independent series of PDAC patients (n = 78) using nCounter analysis of expression (in tumor versus surrounding pancreatic tissue) and Cox regression for disease-free and overall survival. Of these genes, expression levels of ABCB1 and CXCR4 were correlated with worse patient survival. Thus, our study for the first time demonstrates that human PDAC contains a SP. This tumor subpopulation may represent a valuable therapeutic target given its chemoresistance- and CSC-associated gene expression characteristics with potential prognostic value. Public Library of Science 2013-09-17 /pmc/articles/PMC3775803/ /pubmed/24069258 http://dx.doi.org/10.1371/journal.pone.0073968 Text en © 2013 Van den broeck et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Van den broeck, Anke Vankelecom, Hugo Van Delm, Wouter Gremeaux, Lies Wouters, Jasper Allemeersch, Joke Govaere, Olivier Roskams, Tania Topal, Baki Human Pancreatic Cancer Contains a Side Population Expressing Cancer Stem Cell-Associated and Prognostic Genes |
title | Human Pancreatic Cancer Contains a Side Population Expressing Cancer Stem Cell-Associated and Prognostic Genes |
title_full | Human Pancreatic Cancer Contains a Side Population Expressing Cancer Stem Cell-Associated and Prognostic Genes |
title_fullStr | Human Pancreatic Cancer Contains a Side Population Expressing Cancer Stem Cell-Associated and Prognostic Genes |
title_full_unstemmed | Human Pancreatic Cancer Contains a Side Population Expressing Cancer Stem Cell-Associated and Prognostic Genes |
title_short | Human Pancreatic Cancer Contains a Side Population Expressing Cancer Stem Cell-Associated and Prognostic Genes |
title_sort | human pancreatic cancer contains a side population expressing cancer stem cell-associated and prognostic genes |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3775803/ https://www.ncbi.nlm.nih.gov/pubmed/24069258 http://dx.doi.org/10.1371/journal.pone.0073968 |
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