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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ferrand, N. Lallemand, F. Marais, J. Pessah, M. Gauthier, J. M. Prunier, C. Atfi, A. Mazars, A. |
| Description | Author Affiliation: Pessah M ( Institut National de la Santé et de la Recherche Médicale U 482, Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France.); |
| Abstract | The Sma and Mad related (Smad) family proteins are critical mediators of the transforming growth factor-beta (TGF-beta) superfamily signaling. After TGF-beta-mediated phosphorylation and association with Smad4, Smad2 moves to the nucleus and activates expression of specific genes through cooperative interactions with DNA-binding proteins, including members of the winged-helix family of transcription factors, forkhead activin signal transducer (FAST)-1 and FAST2. TGF-beta has also been described to activate other signaling pathways, such as the c-Jun N-terminal Kinase (JNK) pathway. Here, we show that activation of JNK cascade blocked the ability of Smad2 to mediate TGF-beta-dependent activation of the FAST proteins. This inhibitory activity is mediated through the transcriptional factor c-Jun, which enhances the association of Smad2 with the nuclear transcriptional corepressor TG-interacting factor (TGIF), thereby interfering with the assembly of Smad2 and the coactivator p300 in response to TGF-beta signaling. Interestingly, c-Jun directly binds to the nuclear transcriptional corepressor TGIF and is required for TGIF-mediated repression of Smad2 transcriptional activity. These studies thus reveal a mechanism for suppression of Smad2 signaling pathway by JNK cascade through transcriptional repression. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 11 |
| Volume Number | 98 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2001-05-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | DNA-Binding Proteins Metabolism Gene Expression Regulation Homeodomain Proteins MAP Kinase Kinase 4 MAP Kinase Kinase Kinase 1 Mitogen-Activated Protein Kinases Repressor Proteins Signal Transduction Physiology Trans-Activators Transforming Growth Factor Beta Animals COS Cells Cercopithecus Aethiops Genetics Forkhead Transcription Factors JNK Mitogen-Activated Protein Kinases Mitogen-Activated Protein Kinase Kinases Protein-Serine-Threonine Kinases Smad2 Protein Transcription Factors Transcription, Genetic Tumor Cells, Cultured Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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