Differential roles of GDF15 and FGF21 in systemic metabolic adaptation to the mitochondrial integrated stress response

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Perturbation of mitochondrial proteostasis provokes cell autonomous and cell non-autonomous responses that contribute to homeostatic adaptation. Here, we demonstrate distinct metabolic effects of hepatic metabokines as cell non-autonomous factors in mice with mitochondrial OxPhos dysfunction. Liver-specific mitochondrial stress induced by a loss-of-function mutation in Crif1 (LKO) leads to aberrant oxidative phosphorylation and promotes the mitochondrial unfolded protein response. LKO mice are highly insulin sensitive and resistant to diet-induced obesity. The hepatocytes of LKO mice secrete large quantities of metabokines, including GDF15 and FGF21, which confer metabolic benefits. We evaluated the metabolic phenotypes of LKO mice with global deficiency of GDF15 or FGF21 and show that GDF15 regulates body and fat mass and prevents diet-induced hepatic steatosis, whereas FGF21 upregulates insulin sensitivity, energy expenditure, and thermogenesis in white adipose tissue. This study reveals that the mitochondrial integrated stress response (ISRmt) in liver mediates metabolic adaptation through hepatic metabokines.
Publisher
CELL PRESS
Issue Date
2021-03
Language
English
Article Type
Article
Citation

ISCIENCE, v.24, no.3

ISSN
2589-0042
DOI
10.1016/j.isci.2021.102181
URI
http://hdl.handle.net/10203/282365
Appears in Collection
MSE-Journal Papers(저널논문)
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