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Updated: Jun 23, 2025

Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
Published on: October 27, 2020
RNA regulatory mechanisms controlling TGF-β signaling and EMT in cancer
Cameron P Bracken1, Gregory J Goodall1, Philip A Gregory2
1Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA 5000, Australia; Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, SA 5000, Australia; School of Biological Sciences, Faculty of Sciences, Engineering and Technology, The University of Adelaide, Adelaide, SA 5000, Australia.
Abstract:
Epithelial-mesenchymal transition (EMT) is a major contributor to metastatic progression and is prominently regulated by TGF-β signalling. Both EMT and TGF-β pathway components are tightly controlled by non-coding RNAs - including microRNAs (miRNAs), long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) - that collectively have major impacts on gene expression and resulting cellular states. While miRNAs are the best characterised regulators of EMT and TGF-β signaling and the miR-200-ZEB1/2 feedback loop plays a central role, important functions for lncRNAs and circRNAs are also now emerging. This review will summarise our current understanding of the roles of non-coding RNAs in EMT and TGF-β signaling with a focus on their functions in cancer progression.
Insights
Non-coding RNAs regulate epithelial-mesenchymal transition (EMT) and TGF-β signaling, crucial for cancer metastasis. This review details the roles of microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs) in these processes.
Area of Science:
- Molecular Biology
- Cancer Research
- Genetics
Background:
- Epithelial-mesenchymal transition (EMT) drives cancer metastasis and is regulated by TGF-β signaling.
- Non-coding RNAs, including miRNAs, lncRNAs, and circRNAs, are key regulators of gene expression.
- The miR-200 family's role in the EMT-TGF-β axis is well-established, but lncRNA and circRNA functions are emerging.
Purpose of the Study:
- To review the current understanding of non-coding RNAs in EMT and TGF-β signaling.
- To highlight the impact of these non-coding RNAs on cancer progression.
- To synthesize the roles of miRNAs, lncRNAs, and circRNAs in regulating these critical cellular processes.
Main Methods:
- Literature review of studies on non-coding RNAs, EMT, and TGF-β signaling.
- Analysis of research focusing on the regulatory mechanisms of non-coding RNAs.
- Synthesis of findings related to cancer progression and non-coding RNA involvement.
Main Results:
- MicroRNAs, particularly the miR-200 family, are critical regulators of the EMT-TGF-β feedback loop.
- Long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) also play significant roles in modulating EMT and TGF-β signaling.
- These non-coding RNAs collectively influence gene expression, impacting cellular states and cancer progression.
Conclusions:
- Non-coding RNAs are integral to the regulation of EMT and TGF-β signaling pathways.
- Understanding the multifaceted roles of miRNAs, lncRNAs, and circRNAs is crucial for deciphering cancer metastasis.
- Further research into these non-coding RNAs offers potential therapeutic strategies for cancer treatment.
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