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Updated: Feb 7, 2026

Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
Published on: October 27, 2020
Intracellular and extracellular TGF-β signaling in cancer: some recent topics
Kohei Miyazono1, Yoko Katsuno2, Daizo Koinuma2
1Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan. miyazono@m.u-tokyo.ac.jp.
Abstract:
Transforming growth factor (TGF)-β regulates a wide variety of cellular responses, including cell growth arrest, apoptosis, cell differentiation, motility, invasion, extracellular matrix production, tissue fibrosis, angiogenesis, and immune function. Although tumor-suppressive roles of TGF-β have been extensively studied and well-characterized in many cancers, especially at early stages, accumulating evidence has revealed the critical roles of TGF-β as a pro-tumorigenic factor in various types of cancer. This review will focus on recent findings regarding epithelial-mesenchymal transition (EMT) induced by TGF-β, in relation to crosstalk with some other signaling pathways, and the roles of TGF-β in lung and pancreatic cancers, in which TGF-β has been shown to be involved in cancer progression. Recent findings also strongly suggested that targeting TGF-β signaling using specific inhibitors may be useful for the treatment of some cancers. TGF-β plays a pivotal role in the differentiation and function of regulatory T cells (Tregs). TGF-β is produced as latent high molecular weight complexes, and the latent TGF-β complex expressed on the surface of Tregs contains glycoprotein A repetitions predominant (GARP, also known as leucine-rich repeat containing 32 or LRRC32). Inhibition of the TGF-β activities through regulation of the latent TGF-β complex activation will be discussed.
Insights
Transforming growth factor-beta (TGF-β) can suppress tumors early on but promotes cancer progression later by inducing epithelial-mesenchymal transition (EMT). Targeting TGF-β signaling offers potential cancer treatment strategies.
Area of Science:
- Oncology
- Cell Biology
- Immunology
Background:
- Transforming growth factor-beta (TGF-β) has dual roles in cancer, acting as a tumor suppressor in early stages and a pro-tumorigenic factor in later stages.
- TGF-β signaling is implicated in diverse cellular processes, including epithelial-mesenchymal transition (EMT), immune function, and extracellular matrix production.
Purpose of the Study:
- To review recent findings on TGF-β-induced EMT and its crosstalk with other signaling pathways.
- To discuss the role of TGF-β in the progression of lung and pancreatic cancers.
- To explore the potential of targeting TGF-β signaling for cancer therapy.
Main Methods:
- Literature review of recent findings on TGF-β signaling in cancer.
- Analysis of TGF-β's role in epithelial-mesenchymal transition (EMT).
- Examination of TGF-β's involvement in regulatory T cell (Treg) differentiation and function.
Main Results:
- TGF-β promotes cancer progression through EMT, particularly in lung and pancreatic cancers.
- TGF-β signaling crosstalks with other pathways, influencing tumor microenvironment.
- TGF-β is crucial for regulatory T cell (Treg) function, involving complexes like GARP.
Conclusions:
- Targeting TGF-β signaling pathways presents a promising therapeutic strategy for certain cancers.
- Understanding TGF-β's complex roles in cancer progression and immune modulation is critical for effective treatment development.
- Inhibiting TGF-β activity via latent complex regulation is a potential therapeutic approach.
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