Autor segons l'article: Joan Vendrell; Sylviane Lagarrigue; Isabel C. Lopez-Mejia; Pierre-Damien Denechaud; Xavier Escoté; Judit Castillo-Armengol; Veronica Jimenez; Carine Chavey; Albert Giralt; Qiuwen Lai; Lianjun Zhang; Laia Martinez-Carreres; Brigitte Delacuisine; Jean-Sébastien Annicotte; Emilie Blanchet; Sébastien Huré; Anna Abella; Francisco J. Tinahones; Pierre Dubus; Fatima Bosch; C. Ronald Kahn; Lluis Fajas
Departament: Medicina i Cirurgia
e-ISSN: 1558-8238
Autor/s de la URV: VENDRELL ORTEGA, JUAN JOSÉ
Paraules clau: Insulin Adipocyte adipogenesis
Resum: Insulin resistance is a fundamental pathogenic factor that characterizes various metabolic disorders, including obesity and type 2 diabetes. Adipose tissue contributes to the development of obesity-related insulin resistance through increased release of fatty acids, altered adipokine secretion, and/or macrophage infiltration and cytokine release. Here, we aimed to analyze the participation of the cyclin-dependent kinase 4 (CDK4) in adipose tissue biology. We determined that white adipose tissue (WAT) from CDK4-deficient mice exhibits impaired lipogenesis and increased lipolysis. Conversely, lipolysis was decreased and lipogenesis was increased in mice expressing a mutant hyperactive form of CDK4 (CDK4R24C). A global kinome analysis of CDK4-deficient mice following insulin stimulation revealed that insulin signaling is impaired in these animals. We determined that insulin activates the CCND3-CDK4 complex, which in turn phosphorylates insulin receptor substrate 2 (IRS2) at serine 388, thereby creating a positive feedback loop that maintains adipocyte insulin signaling. Furthermore, we found that CCND3 expression and IRS2 serine 388 phosphorylation are increased in human obese subjects. Together, our results demonstrate that CDK4 is a major regulator of insulin signaling in WAT.
Grup de recerca: Grup de Recerca Biomèdica HJ23
Àrees temàtiques: Ciències de la salut Ciencias de la salud Health sciences
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0021-9738
Data d'alta del registre: 2016-07-27
Pàgina final: 348
Volum de revista: 126
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.jci.org/articles/view/81480
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI de l'article: https://doi.org/10.1172/JCI81480
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2016
Pàgina inicial: 335
Tipus de publicació: Article Artículo Article