More than structural cells, fibroblasts create and orchestrate the tumor microenvironment

Carolyn J Baglole1, Denise M Ray, Steven H Bernstein

  • 1Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, and Lymphoma Biology Program, James P. Wilmot Cancer Center, Rochester, New York 14642, USA.

The tumor microenvironment comprises many cell types including infiltrating immune cells such as lymphocytes, endothelial cells and a complex stroma consisting mainly of fibroblasts. Fibroblasts are heterogeneous and consist of Thy-1+ and Thy-1- subsets that define different biosynthetic and differentiation potential. They produce mediators linked to carcinogenesis and metastasis, including Cox-2 and PGE2, both of which are also increased in most cancers. This review will highlight the emerging role of the complex fibroblastic stroma in establishing a microenvironment supporting malignant transformation, tumor growth and attenuation of host anti-tumor immune responses.

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