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Updated: Aug 8, 2026

Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
Published on: October 27, 2020
The logic of TGFbeta signaling
1Cancer Biology and Genetics Program, Howard Hughes Medical Institute, Memorial Sloan-Kettering Cancer Center, P.O. Box 116, 1275 York Avenue, New York, NY 10021, USA. j-massague@ski.mskcc.org
The transforming growth factor beta (TGF-β) pathway regulates cell fate and development. Understanding its role in cell cycle arrest reveals mechanisms tumors use for metastasis.
Area of Science:
- Molecular Biology
- Cell Biology
- Cancer Biology
Background:
- The transforming growth factor beta (TGF-β) cytokine signaling pathway is crucial for cell fate and development.
- This pathway involves membrane receptor serine/threonine kinases and Smad transcription factors.
- Gene activation and repression programs are controlled by this signaling cascade.
Purpose of the Study:
- To delineate the process of signal conversion within the TGF-β pathway.
- To deconstruct the cell cycle arrest response mediated by TGF-β.
- To elucidate molecular mechanisms underlying tumor evasion and metastasis.
Main Methods:
- Identification of TGF-β pathway components (receptors, Smads).
- Analysis of signal transduction from receptor activation to gene expression.
- Deconstruction of the cell cycle arrest molecular machinery.
Main Results:
- The TGF-β pathway's role in gene regulation has been delineated.
- The molecular components of the cell cycle arrest response were identified.
- Insights into tumor evasion and metastasis mechanisms were gained.
Conclusions:
- The TGF-β pathway is central to critical cell fate decisions.
- Understanding cell cycle arrest mechanisms provides targets for cancer therapy.
- This research sheds light on how tumors metastasize.
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Activation of Integrins
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.