Deficiency of the autophagy gene atg16l1 ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
PMID :
URL permanente :
Titre :
Deficiency of the autophagy gene atg16l1 induces insulin resistance through klhl9/klhl13/cul3-mediated irs1 degradation
Auteur(s) :
Frendo-Cumbo, Scott [Auteur]
Jaldin-Fincati, Javier R. [Auteur]
Coyaud, Etienne-Marie [Auteur]
Laurent, Estelle [Auteur]
Protéomique, Réponse Inflammatoire, Spectrométrie de Masse (PRISM) - U1192
Townsend, Logan K. [Auteur]
Tan, Joel M. J. [Auteur]
Xavier, Ramnik J. [Auteur]
Pillon, Nicolas J. [Auteur]
Raught, Brian [Auteur]
Wright, David C. [Auteur]
Brumell, John Hunter [Auteur]
Klip, Amira [Auteur]
Jaldin-Fincati, Javier R. [Auteur]
Coyaud, Etienne-Marie [Auteur]
Laurent, Estelle [Auteur]
Protéomique, Réponse Inflammatoire, Spectrométrie de Masse (PRISM) - U1192
Townsend, Logan K. [Auteur]
Tan, Joel M. J. [Auteur]
Xavier, Ramnik J. [Auteur]
Pillon, Nicolas J. [Auteur]
Raught, Brian [Auteur]
Wright, David C. [Auteur]
Brumell, John Hunter [Auteur]
Klip, Amira [Auteur]
Titre de la revue :
THE JOURNAL OF BIOLOGICAL CHEMISTRY
Nom court de la revue :
J. Biol. Chem.
Numéro :
294
Pagination :
-
Date de publication :
2019-11-01
ISSN :
0021-9258
Mot(s)-clé(s) :
E3 ubiquitin ligase
Kelch-like gene family
insulin receptor substrate 1 (IRS-1)
Akt PKB
autophagy
cell signaling
insulin
insulin signaling
Kelch-like gene family
insulin receptor substrate 1 (IRS-1)
Akt PKB
autophagy
cell signaling
insulin
insulin signaling
Discipline(s) HAL :
Sciences du Vivant [q-bio]
Résumé en anglais : [en]
Connections between deficient autophagy and insulin resistance have emerged, however, the mechanism through which reduced autophagy impairs insulin-signaling remains unknown. We examined mouse embryonic fibroblasts lacking ...
Lire la suite >Connections between deficient autophagy and insulin resistance have emerged, however, the mechanism through which reduced autophagy impairs insulin-signaling remains unknown. We examined mouse embryonic fibroblasts lacking Atg16l1 (ATG16L1 KO mouse embryonic fibroblasts (MEFs)), an essential autophagy gene, and observed deficient insulin and insulin-like growth factor-1 signaling. ATG16L1 KO MEFs displayed reduced protein content of insulin receptor substrate-1 (IRS1), pivotal to insulin signaling, whereas IRS1myc overexpression recovered downstream insulin signaling. Endogenous IRS1 protein content and insulin signaling were restored in ATG16L1 KO mouse embryonic fibroblasts (MEF) upon proteasome inhibition. Through proximity-dependent biotin identification (BioID) and co-immunoprecipitation, we found that Kelch-like proteins KLHL9 and KLHL13, which together form an E3 ubiquitin (Ub) ligase complex with cullin 3 (CUL3), are novel IRS1 interactors. Expression of Klhl9 and Klhl13 was elevated in ATG16L1 KO MEFs and siRNA-mediated knockdown of Klhl9, Klhl13, or Cul3 recovered IRS1 expression. Moreover, Klhl13 and Cul3 knockdown increased insulin signaling. Notably, adipose tissue of high-fat fed mice displayed lower Atg16l1 mRNA expression and IRS1 protein content, and adipose tissue KLHL13 and CUL3 expression positively correlated to body mass index in humans. We propose that ATG16L1 deficiency evokes insulin resistance through induction of Klhl9 and Klhl13, which, in complex with Cul3, promote proteasomal IRS1 degradation.Lire moins >
Lire la suite >Connections between deficient autophagy and insulin resistance have emerged, however, the mechanism through which reduced autophagy impairs insulin-signaling remains unknown. We examined mouse embryonic fibroblasts lacking Atg16l1 (ATG16L1 KO mouse embryonic fibroblasts (MEFs)), an essential autophagy gene, and observed deficient insulin and insulin-like growth factor-1 signaling. ATG16L1 KO MEFs displayed reduced protein content of insulin receptor substrate-1 (IRS1), pivotal to insulin signaling, whereas IRS1myc overexpression recovered downstream insulin signaling. Endogenous IRS1 protein content and insulin signaling were restored in ATG16L1 KO mouse embryonic fibroblasts (MEF) upon proteasome inhibition. Through proximity-dependent biotin identification (BioID) and co-immunoprecipitation, we found that Kelch-like proteins KLHL9 and KLHL13, which together form an E3 ubiquitin (Ub) ligase complex with cullin 3 (CUL3), are novel IRS1 interactors. Expression of Klhl9 and Klhl13 was elevated in ATG16L1 KO MEFs and siRNA-mediated knockdown of Klhl9, Klhl13, or Cul3 recovered IRS1 expression. Moreover, Klhl13 and Cul3 knockdown increased insulin signaling. Notably, adipose tissue of high-fat fed mice displayed lower Atg16l1 mRNA expression and IRS1 protein content, and adipose tissue KLHL13 and CUL3 expression positively correlated to body mass index in humans. We propose that ATG16L1 deficiency evokes insulin resistance through induction of Klhl9 and Klhl13, which, in complex with Cul3, promote proteasomal IRS1 degradation.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
INSERM
Université de Lille
Université de Lille
Date de dépôt :
2022-06-15T13:59:15Z