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Published on: December 19, 2019
Transforming growth factor-Beta and urokinase-type plasminogen activator: dangerous partners in
1Laboratory for Experimental Hematology and Stem Cells, Institute for Medical Research, University of Belgrade, Dr. Subotića 4, 11129 Belgrade, Serbia.
Abstract:
Transforming growth factor-beta (TGF- β ) is a pleiotropic factor, with several different roles in health and disease. TGF- β has been postulated as a dual factor in tumor progression, since it represses epithelial tumor development in early stages, whereas it stimulates tumor progression in advanced stages. During tumorigenesis, cancer cells acquire the capacity to migrate and invade surrounding tissues and to metastasize different organs. The urokinase-type plasminogen activator (uPA) system, comprising uPA, the uPA cell surface receptor, and plasminogen-plasmin, is involved in the proteolytic degradation of the extracellular matrix and regulates key cellular events by activating intracellular signal pathways, which together allow cancer cells to survive, thus, enhancing cell malignance during tumor progression. Due to their importance, uPA and its receptor are tightly transcriptionally regulated in normal development, but are deregulated in cancer, when their activity and expression are related to further development of cancer. TGF- β regulates uPA expression in cancer cells, while uPA, by plasminogen activation, may activate the secreted latent TGF- β , thus, producing a pernicious cycle which contributes to the enhancement of tumor progression. Here we review the specific roles and the interplay between TGF- β and uPA system in cancer cells and their implication in skin cancer.
Insights
Transforming growth factor-beta (TGF-β) and the urokinase-type plasminogen activator (uPA) system create a cycle that enhances tumor progression. This interaction is crucial in understanding advanced cancer development and metastasis.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Transforming growth factor-beta (TGF-β) exhibits dual roles in tumor progression, initially suppressing and later promoting cancer.
- The urokinase-type plasminogen activator (uPA) system is vital for extracellular matrix degradation and intracellular signaling, crucial for cancer cell survival and malignancy.
- Both TGF-β and the uPA system are deregulated in cancer, contributing to disease progression.
Purpose of the Study:
- To review the specific roles of TGF-β and the uPA system in cancer cells.
- To elucidate the interplay between TGF-β and the uPA system during tumor progression.
- To discuss the implications of this interaction in skin cancer.
Main Methods:
- Literature review of studies investigating TGF-β and uPA system in cancer.
- Analysis of molecular mechanisms underlying the regulation and interaction of TGF-β and uPA.
- Synthesis of findings related to their collective impact on cancer cell behavior and metastasis.
Main Results:
- TGF-β regulates uPA expression in cancer cells.
- The uPA system, through plasminogen activation, can activate latent TGF-β, forming a positive feedback loop.
- This TGF-β and uPA interplay enhances cancer cell migration, invasion, and metastasis.
Conclusions:
- The interaction between TGF-β and the uPA system represents a critical mechanism driving tumor progression and malignancy.
- Understanding this pernicious cycle is essential for developing targeted therapies for advanced cancers, including skin cancer.
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