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Updated: Dec 25, 2025
06:54
Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
Published on: October 27, 2020
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Beta-catenin: a transforming actor on many stages
Keiko Miyoshi1, Lothar Hennighausen
1Department of Biochemistry, School of Dentistry, The University of Tokushima, Japan.
Breast Cancer Research : BCR
|March 13, 2003
Summary
Mutations stabilizing beta-catenin are common in many cancers. This study used mouse models to show the Wnt/beta-catenin pathway can override cell differentiation, promoting neoplasias.
Area of Science:
- Molecular Biology
- Cancer Research
- Developmental Biology
Background:
- Beta-catenin stabilization through mutations is frequent in colon, liver, and ovarian tumors, but less so in breast cancer.
- The Wnt/beta-catenin signaling pathway is crucial for cell fate during development and plays a role in differentiated epithelia.
Purpose of the Study:
- To investigate the cell-specific molecular nature of beta-catenin signaling.
- To understand the role of the Wnt/beta-catenin pathway in tumorigenesis and cell fate determination.
Main Methods:
- Utilized experimental mouse genetics, including gain-of-function and loss-of-function mutations.
- Employed transgenic mouse models with targeted activation of Wnt/beta-catenin pathway components in specific epithelia.
Main Results:
- Demonstrated essential roles for beta-catenin in development and tumorigenesis.
- Showed that activating the Wnt/beta-catenin pathway in mammary and prostate epithelium can induce neoplasias and squamous metaplasias.
- Indicated the Wnt/beta-catenin pathway can dominate over differentiation programs, imposing an epidermal fate.
Conclusions:
- The Wnt/beta-catenin pathway is a dominant signaling pathway that can reprogram cell fate and induce neoplasias.
- Cellular responses to Wnt signaling may be context-specific, influenced by experimental design.
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