Autor según el artículo: 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
Departamento: Medicina i Cirurgia
e-ISSN: 1558-8238
Autor/es de la URV: VENDRELL ORTEGA, JUAN JOSÉ
Palabras clave: Insulin Adipocyte adipogenesis
Resumen: 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.
Grupo de investigación: Grup de Recerca Biomèdica HJ23
Áreas temáticas: Ciències de la salut Ciencias de la salud Health sciences
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0021-9738
Fecha de alta del registro: 2016-07-27
Página final: 348
Volumen de revista: 126
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://www.jci.org/articles/view/81480
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI del artículo: https://doi.org/10.1172/JCI81480
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2016
Página inicial: 335
Tipo de publicación: Article Artículo Article