Abstract:
AIM/HYPOTHESIS:Mitochondria and the endoplasmic reticulum (ER) physically interact by close structural juxtaposition, via the mitochondria-associated ER membrane. Inter-organelle communication between the ER and mitochondria has been shown to regulate energy metabolism and to be central to the modulation of various key processes such as ER stress. We aimed to clarify the role of mitochondrial fission in this communication. METHODS:We generated mice lacking the mitochondrial fission protein dynamin-related protein 1 (DRP1) in the liver (Drp1LiKO mice). RESULTS:Drp1LiKO mice showed decreased fat mass and were protected from high-fat diet (HFD)-induced obesity. Analysis of liver gene expression profiles demonstrated marked elevation of ER stress markers. In addition, we observed increased expression of the fibroblast growth factor 21 (FGF21) gene through induction of activating transcription factor 4, master regulator of the integrated stress response. CONCLUSIONS/INTERPRETATION:Disruption of mitochondrial fission in the liver provoked ER stress, while inducing the expression of FGF21 to increase energy expenditure and protect against HFD-induced obesity.
journal_name
Diabetologiajournal_title
Diabetologiaauthors
Wang L,Ishihara T,Ibayashi Y,Tatsushima K,Setoyama D,Hanada Y,Takeichi Y,Sakamoto S,Yokota S,Mihara K,Kang D,Ishihara N,Takayanagi R,Nomura Mdoi
10.1007/s00125-015-3704-7subject
Has Abstractpub_date
2015-10-01 00:00:00pages
2371-80issue
10eissn
0012-186Xissn
1432-0428pii
10.1007/s00125-015-3704-7journal_volume
58pub_type
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