摘要：SummaryPerturbation 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 inCrif1(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.Graphical abstractDisplay OmittedHighlights•Hepatic mitoribosomal defect in LKO mice leads to the ISRmtand metabolic reprogramming•LKO mice have increased insulin sensitivity and are resistant to diet-induced obesity•GDF15 regulates body and fat mass and prevents hepatic steatosis in LKO mice•FGF21 improves glucose clearance, energy expenditure, and thermogenesis in LKO micePhysiology; Cell Biology; Systems Biology
