http://www.cnr.it/ontology/cnr/individuo/prodotto/ID5031
PC4/Tis7/IFRD1 stimulates skeletal muscle regeneration and is involved in myoblast differentiation as a regulator of MyoD and NF-kB (Articolo in rivista)
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- PC4/Tis7/IFRD1 stimulates skeletal muscle regeneration and is involved in myoblast differentiation as a regulator of MyoD and NF-kB (Articolo in rivista) (literal)
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- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1074/jbc.M110.162842 (literal)
- Alternative label
Micheli L.1*, Leonardi L.1*, Conti F.1*, Maresca G.1, Colazingari S.1, Mattei E.1, Lira S.A.2, Farioli-Vecchioli S.1, Caruso M.1, Tirone F.1 (2010)
PC4/Tis7/IFRD1 stimulates skeletal muscle regeneration and is involved in myoblast differentiation as a regulator of MyoD and NF-kB
in Journal of biological chemistry (Online); American society for biochemistry and molecular biology, Baltimore (Stati Uniti d'America)
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- Micheli L.1*, Leonardi L.1*, Conti F.1*, Maresca G.1, Colazingari S.1, Mattei E.1, Lira S.A.2, Farioli-Vecchioli S.1, Caruso M.1, Tirone F.1 (literal)
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- - Pubblicato in formato elettronico il 2 Decembre, 2010, doi: 10.1074/jbc.M110.162842
- Pubblicato in formato a stampa il 18 Febbraio, 2011 - The Journal of Biological Chemistry, Vol. 286, p. 5691-5707 (literal)
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- http://www.jbc.org/content/286/7/5691 (literal)
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- 1 - Istituto di Neurobiologia e Medicina Molecolare, Consiglio Nazionale delle Ricerche, Fondazione S.Lucia, Via del Fosso di Fiorano 64, 00143, Rome, Italy; 2 - Immunology Institute, Mount Sinai School of Medicine, New York, New York, USA. (literal)
- Titolo
- PC4/Tis7/IFRD1 stimulates skeletal muscle regeneration and is involved in myoblast differentiation as a regulator of MyoD and NF-kB (literal)
- Abstract
- In skeletal muscle cells the PC4 (Tis7/IFRD1) protein is known to function as a coactivator of MyoD by promoting the transcriptional
activity of myocyte enhancer factor 2C (MEF2C). In this study we show that
upregulation of PC4 in vivo in adult muscle significantly potentiates injury-induced regeneration by enhancing myogenesis.
Conversely, we observe that PC4-silencing in myoblasts causes delayed exit from the cell cycle, accompanied by delayed differentiation,
and show that such effect is MyoD-dependent.
We provide evidence revealing a novel mechanism underlying the promyogenic
actions of PC4, by which PC4 functions as a negative regulator of NF-kB, known to inhibit MyoD expression post-transcriptionally. In fact, upregulation of PC4 in primary myoblasts induces the deacetylation, and
hence the inactivation and nuclear export of NF-kB p65, in concomitance with induction of MyoD expression. On the contrary, PC4-silencing in myoblasts induces the acetylation and nuclear import of p65, in parallel with a decrease of MyoD levels. We also observe that PC4 potentiates the inhibition of NF-kbeta transcriptional activity mediated by histone deacetylases (HDACs) and that PC4 is able to form trimolecular complexes with p65 and HDAC3. This suggests that PC4 stimulates deacetylation of p65 by favoring the recruitment of HDAC3 to p65.
As a whole, these results indicate that PC4 plays a role in muscle differentiation by controlling the MyoD pathway through multiple mechanisms, and as such positively regulates regenerative myogenesis. (literal)
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