Carcinoma-associated fibroblast-like differentiation of human mesenchymal stem cells.

Abstract

Carcinoma-associated fibroblasts (CAF) have recently been implicated in important aspects of epithelial solid tumor biology, such as neoplastic progression, tumor growth, angiogenesis, and metastasis. However, neither the source of CAFs nor the differences between CAFs and fibroblasts from nonneoplastic tissue have been well defined. In this study, we show that human bone marrow-derived mesenchymal stem cells (hMSCs) exposed to tumor-conditioned medium (TCM) over a prolonged period of time assume a CAF-like myofibroblastic phenotype. More importantly, these cells exhibit functional properties of CAFs, including sustained expression of stromal-derived factor-1 (SDF-1) and the ability to promote tumor cell growth both in vitro and in an in vivo coimplantation model, and expression of myofibroblast markers, including alpha-smooth muscle actin and fibroblast surface protein. hMSCs induced to differentiate to a myofibroblast-like phenotype using 5-azacytidine do not promote tumor cell growth as efficiently as hMSCs cultured in TCM nor do they show increased SDF-1 expression. Furthermore, gene expression profiling revealed similarities between TCM-exposed hMSCs and CAFs. Taken together, these data suggest that hMSCs are a source of CAFs and can be used in the modeling of tumor-stroma interactions. To our knowledge, this is the first report showing that hMSCs become activated and resemble carcinoma-associated myofibroblasts on prolonged exposure to conditioned medium from MDAMB231 human breast cancer cells.

• Authors: Pravin J Mishra, Prasun J Mishra, Rita Humeniuk, Daniel J Medina, Gabriela Alexe, Jill P Mesirov, Sridhar Ganesan, John W Glod, Debabrata Banerjee
• Journal: Cancer research (Cancer Res) Vol. 68 Issue 11 Pg. 4331-9 (Jun 01 2008) ISSN: 1538-7445 [Electronic] United States
• PMID: 18519693 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Culture Media, Conditioned
• DNA Primers

Topics

• Animals
• Base Sequence
• Cell Differentiation
• Cell Division
• Cell Line, Tumor
• Culture Media, Conditioned
• DNA Primers
• Fibroblasts (cytology)
• Fluorescent Antibody Technique
• Humans
• Mesenchymal Stem Cells (cytology)
• Mice
• Mice, Nude
• Neoplasms (pathology)
• Reverse Transcriptase Polymerase Chain Reaction