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  • Fujita, Hidetoshi, et al. (författare)
  • The E3 ligase synoviolin controls body weight and mitochondrial biogenesis through negative regulation of PGC-1 beta
  • 2015
  • Ingår i: EMBO Journal. - : EMBO. - 1460-2075 .- 0261-4189. ; 34:8, s. 1042-1055
  • Tidskriftsartikel (refereegranskat)abstract
    • Obesity is a major global public health problem, and understanding its pathogenesis is critical for identifying a cure. In this study, a gene knockout strategy was used in post-neonatal mice to delete synoviolin (Syvn) 1/Hrd1/Der3, an ER-resident E3 ubiquitin ligase with known roles in homeostasis maintenance. Syvn1 deficiency resulted in weight loss and lower accumulation of white adipose tissue in otherwise wild-type animals as well as in genetically obese (ob/ob and db/db) and adipose tissue-specific knockout mice as compared to control animals. SYVN1 interacted with and ubiquitinated the thermogenic coactivator peroxisome proliferator-activated receptor coactivator (PGC)-1 beta, and Syvn1 mutants showed upregulation of PGC-1 beta target genes and increase in mitochondrion number, respiration, and basal energy expenditure in adipose tissue relative to control animals. Moreover, the selective SYVN1 inhibitor LS-102 abolished the negative regulation of PGC-1 beta by SYVN1 and prevented weight gain in mice. Thus, SYVN1 is a novel post-translational regulator of PGC-1 beta and a potential therapeutic target in obesity treatment.
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