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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.
Immunological Investigations
|August 19, 2006
Summary
Fibroblasts within the tumor microenvironment create a stroma that supports cancer growth and hinders anti-tumor immunity. These cells, including Thy-1+ and Thy-1- subsets, produce mediators like Cox-2 and PGE2, promoting carcinogenesis and metastasis.
Area of Science:
- Oncology
- Immunology
- Cell Biology
Background:
- The tumor microenvironment (TME) is a complex ecosystem containing various cells, including immune cells and fibroblasts.
- Fibroblasts within the TME are heterogeneous, with distinct subsets (Thy-1+ and Thy-1-) exhibiting varied differentiation and biosynthetic capabilities.
- These fibroblasts produce key mediators, such as cyclooxygenase-2 (Cox-2) and prostaglandin E2 (PGE2), which are frequently elevated in cancers.
Purpose of the Study:
- To review the significant role of the fibroblastic stroma in shaping the TME.
- To elucidate how the fibroblastic stroma promotes malignant transformation and tumor progression.
- To highlight the impact of the fibroblastic stroma on suppressing anti-tumor immune responses.
Main Methods:
- Literature review focusing on the cellular composition and function of the tumor microenvironment.
- Analysis of studies investigating fibroblast heterogeneity and their secreted mediators.
- Synthesis of research on the interplay between cancer-associated fibroblasts and immune cells.
Main Results:
- Fibroblasts are a major stromal component in the TME, influencing its overall characteristics.
- Distinct fibroblast subsets possess unique potentials that contribute to tumor development.
- Mediators like Cox-2 and PGE2 produced by fibroblasts are implicated in cancer progression and metastasis.
Conclusions:
- The fibroblastic stroma plays a critical, emerging role in fostering a microenvironment conducive to cancer.
- Fibroblasts contribute to malignant transformation, tumor growth, and the evasion of immune surveillance.
- Targeting fibroblast-derived mediators may offer novel therapeutic strategies against cancer.