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Published in: Clinical & Experimental Metastasis 3/2012

01-03-2012 | Research Paper

Dormant but migratory tumour cells in desmoplastic stroma of invasive ductal carcinomas

Authors: Vanisri Raviraj, Hui Zhang, Hsin-ya Chien, Louise Cole, Erik W. Thompson, Lilian Soon

Published in: Clinical & Experimental Metastasis | Issue 3/2012

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Abstract

Mortality in breast cancer is linked to metastasis and recurrence yet there is no acceptable biological model for cancer relapse. We hypothesise that there might exist primary tumour cells capable of escaping surgery by migration and resisting radiotherapy and chemotherapy to cause cancer recurrence. We investigated this possibility in invasive ductal carcinoma (IDC) tissue and observed the presence of solitary primary tumour cells (SPCs) in the dense collagen stroma that encapsulates intratumoural cells (ICs). In IDC tissue sections, collagen was detected with either Masson’s Trichrome or by second harmonics imaging. Cytokeratin-19 (CK-19) and vimentin (VIM) antibodies were, respectively, used to identify epithelial-derived tumour cells and to indicate epithelial to mesenchymal transition (EMT). Confocal/multiphoton microscopy showed that ICs from acini were mainly CK-19+ve and were encapsulated by dense stromal collagen. Within the stroma, SPCs were detected by their staining for both CK-19 and VIM (confirming EMT). ICs and SPCs were subsequently isolated by laser capture microdissection followed by multiplex tandem-PCR studies. SPCs were found to be enriched for pro-migratory and anti-proliferative genes relative to ICs. In vitro experiments using collagen matrices at 20 mg/cm3, similar in density to tumour matrices, demonstrated that SPC-like cells were highly migratory but dormant, phenotypes that recapitulated the genotypes of SPCs in clinical tissue. These data suggest that SPCs located at the breast cancer perimeter are invasive and dormant such that they may exceed surgical margins and resist local and adjuvant therapies. This study has important connotations for a role of SPCs in local recurrence.
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Metadata
Title
Dormant but migratory tumour cells in desmoplastic stroma of invasive ductal carcinomas
Authors
Vanisri Raviraj
Hui Zhang
Hsin-ya Chien
Louise Cole
Erik W. Thompson
Lilian Soon
Publication date
01-03-2012
Publisher
Springer Netherlands
Published in
Clinical & Experimental Metastasis / Issue 3/2012
Print ISSN: 0262-0898
Electronic ISSN: 1573-7276
DOI
https://doi.org/10.1007/s10585-011-9450-4

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