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PMID: 20723242 Published · epublish English Journal Article Research Support, Non-U.S. Gov't

Human mammary fibroblasts stimulate invasion of breast cancer cells in a three-dimensional culture and increase stroma development in mouse xenografts.

BMC cancer ·Vol. 10 ·2010-08-19 ·Pages 444

Olsen CJ, Moreira J, Lukanidin EM, Ambartsumian NS

Abstract

Tumour phenotype is regulated in a complex fashion as a result of interactions between malignant cells and the tumour stroma. Fibroblasts are the most abundant and perhaps most active part of the tumour stroma. A better understanding of the changes that occur in fibroblasts in response to the presence of malignant cells may lead to the development of new strategies for cancer treatment. We explored the effects of fibroblasts on the growth and invasion of mammary carcinoma tumour cells in vitro and in vivo. In order to analyse secreted factors that affect invasive abilities of breast cancer cells we co-cultured human mammary fibroblasts (HMF3s) and cancer cells (MCF7S1) in three-dimensional (3D) growth conditions devoid of heterogeneous cell-cell contact. To study the possible influence of fibroblasts on MCF7S1 cancer cell growth in vivo we co-injected HMF3s and MCF7S1 cells in Balb/c nu/nu mice. In 3D co-culture both HMF3s and MCF7S1 cells demonstrated enhanced invasion into a Matrigel matrix. This was correlated with enhanced expression of the metastasis promoting S100A4 protein in fibroblasts, stimulation of the matrix metalloproteinase (MMP)-2 activity, and enhanced secretion of a range of different cytokines. Orthotopic injection of oestrogen-dependent MCF7S1 cancer cells together with fibroblasts showed stimulation of tumour growth in mice without an external oestrogen supply. The resulting tumours were characterized by increased development of extracellular matrix, as well as an increase of murine S100A4 concentration and activity of MMP-2 in the tumour interstitial fluid. Stimulation of the invasive phenotype of tumour cells in 3D co-cultures with fibroblasts could be correlated with increased production of S100A4 and MMP-2. We propose that enhanced development of mouse host-derived tumour stroma in a MCF7S1 co-injection xenograft model leads to oestrogen independency and is triggered by the initial presence of human fibroblasts.

MeSH Terms
Animals Blotting, Western Breast/cytology,metabolism Breast Neoplasms/metabolism,pathology Cells, Cultured Coculture Techniques Enzyme-Linked Immunosorbent Assay Female Fibroblasts/cytology,metabolism Fluorescent Antibody Technique Humans Immunoenzyme Techniques Matrix Metalloproteinase 2/metabolism Mice Mice, Inbred BALB C S100 Calcium-Binding Protein A4 S100 Proteins/metabolism Stromal Cells/metabolism,pathology Xenograft Model Antitumor Assays
Chemicals
S100 Calcium-Binding Protein A4 S100 Proteins S100a4 protein, mouse Matrix Metalloproteinase 2
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Olsen Charlotta J
Danish Centre for Translational Breast Cancer Research, Strandboulevarden 49, DK-2100 Copenhagen, Denmark.
Moreira José
Lukanidin Eugene M
Ambartsumian Noona S
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Article Info
Journal
BMC cancer
Abbr.
BMC Cancer
ISSN
1471-2407
DOI
10.1186/1471-2407-10-444
Published
2010-08-19
Epub
2010-00-19
Pages
444
Language
English
Region
England
NLM ID
100967800
PMCID
PMC2933628
Subset
IM
External Links
PubMed source DOI: 10.1186/1471-2407-10-444 PMC Full Text View journal details
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