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Updated: May 22, 2026

Induction and Analysis of Epithelial to Mesenchymal Transition
Published on: August 27, 2013
Induction of epithelial-mesenchymal transition by transforming growth factor β
Aristidis Moustakas1, Carl-Henrik Heldin
1Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, SE-751 24 Uppsala, Sweden. aris.moustakas@licr.uu.se
Abstract:
Transforming growth factor β (TGFβ) is implicated in human malignancy. Tumors may escape the tumor suppressor activity of TGFβ by mutating some of its signaling components. Carcinoma and stromal cells produce high amounts of TGFβ which promotes epithelial-mesenchymal transition (EMT), tumor cell invasiveness and tumor angiogenesis, while suppressing immune responses against the tumor. Thus, TGFβ has tumor suppressive as well as tumor promoting effects supporting metastasis. TGFβ elicits the EMT response by activating complementary signaling cascades that mobilize embryonic transcription factors that reprogram the epithelial cell so that it acquires both progenitor-like, pro-motility and mesenchymal features. Such nuclear reprogramming of carcinoma cells involves epigenetic and transcriptional regulation, the activity of miRNAs, and modulation of RNA splicing and mRNA translation, leading to the expression of key intracellular and membrane proteins together with a large pool of secreted factors that mediate and account for the phenotypic changes that accompany EMT.
Insights
Transforming growth factor beta (TGFβ) has dual roles in cancer, suppressing tumors initially but promoting metastasis later. It drives epithelial-mesenchymal transition (EMT), aiding tumor cell invasion and angiogenesis.
Area of Science:
- Oncology
- Cell Biology
- Molecular Biology
Background:
- Transforming growth factor beta (TGFβ) signaling is crucial in human cancers.
- Tumors can evade TGFβ's tumor suppressor functions through mutations in signaling pathways.
- High TGFβ levels from tumor and stromal cells promote tumor progression and metastasis.
Purpose of the Study:
- To elucidate the multifaceted roles of TGFβ in cancer progression.
- To understand how TGFβ signaling contributes to tumor cell invasiveness and angiogenesis.
- To explore the mechanisms by which TGFβ induces epithelial-mesenchymal transition (EMT).
Main Methods:
- Analysis of TGFβ signaling pathways in malignancy.
- Investigation of TGFβ-induced epithelial-mesenchymal transition (EMT) mechanisms.
- Examination of epigenetic, transcriptional, and post-transcriptional regulation in EMT.
Main Results:
- TGFβ exhibits both tumor-suppressive and tumor-promoting effects, ultimately supporting metastasis.
- TGFβ promotes tumor cell invasiveness, angiogenesis, and immune suppression.
- TGFβ signaling activates transcription factors, leading to cellular reprogramming and EMT.
Conclusions:
- TGFβ plays a complex, context-dependent role in cancer, promoting metastasis via EMT.
- EMT reprogramming involves epigenetic, transcriptional, and post-transcriptional modifications.
- Understanding TGFβ's dual role is critical for developing effective cancer therapies.
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