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Mechanisms of TGF-beta signaling in regulation of cell growth and differentiation
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Ludwig Institute for Cancer Research.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Ludwig Institute for Cancer Research.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Ludwig Institute for Cancer Research.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Ludwig Institute for Cancer Research.
2002 (English)In: Immunology Letters, ISSN 0165-2478, E-ISSN 1879-0542, Vol. 82, no 1-2, 85-91 p.Article, review/survey (Refereed) Published
Abstract [en]

Transforming growth factor beta (TGF-beta) is a secreted protein that regulates proliferation, differentiation and death of various cell types. All immune cell lineages, including B, T and dendritic cells as well as macrophages, secrete TGF-beta, which negatively regulates their proliferation, differentiation and activation by other cytokines. Thus, TGF-beta is a potent immunosuppressor and perturbation of TGF-beta signaling is linked to autoimmunity, inflammation and cancer. Regulation of cell proliferation and differentiation by TGF-beta is a topic of great basic and clinical importance. We summarize our work on the growth inhibitory pathway downstream of TGF-beta, which is triggered by receptor serine/threonine kinases at the cell surface and downstream effectors of the Smad family. Activated Smads regulate transcription of target genes, including cell cycle inhibitors such as p21, which mediate the anti-proliferative response and partially explain the tumor suppressive action of the TGF-beta pathway. We have described a molecular mechanism of regulation of the p21 gene by Smads and transcription factor Sp1. At late stages of tumor progression, TGF-beta promotes tumorigenesis via suppression of the immune system and changes in cell differentiation of epithelial tumor cells, a phenomenon termed epithelial to mesenchymal transdifferentiation (EMT). We review our work on the role of the Smad pathway in controlling EMT. In conclusion, the molecular pathways that describe the anti-proliferative and transdifferentiating effects of TGF-beta in epithelial cells have been uncovered to great molecular detail; a future challenge will be to test their generality in other systems, including the immune system.

Place, publisher, year, edition, pages
2002. Vol. 82, no 1-2, 85-91 p.
Keyword [en]
Cell Differentiation/drug effects, Cell Division/drug effects, Cyclin-Dependent Kinase Inhibitor p21, Cyclins/metabolism, Epithelial Cells/cytology, Immune System/drug effects/immunology, Mesoderm/cytology, Models; Biological, Neoplasms/etiology/metabolism, Signal Transduction, Transforming Growth Factor beta/*pharmacology/physiology
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-10469DOI: 10.1016/S0165-2478(02)00023-8PubMedID: 12008039OAI: oai:DiVA.org:uu-10469DiVA: diva2:38237
Available from: 2007-03-26 Created: 2007-03-26 Last updated: 2017-12-11Bibliographically approved

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Moustakas, AristidisPardali, KaterinaHeldin, Carl-Henrik

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