Abstract:
:The quality of mitochondria in skeletal muscle is essential for maintaining metabolic homeostasis during adaptive stress responses. However, the precise control mechanism of muscle mitochondrial quality and its physiological impacts remain unclear. Here, we demonstrate that FUNDC1, a mediator of mitophagy, plays a critical role in controlling muscle mitochondrial quality as well as metabolic homeostasis. Skeletal-muscle-specific ablation of FUNDC1 in mice resulted in LC3-mediated mitophagy defect, leading to impaired mitochondrial energetics. This caused decreased muscle fat utilization and endurance capacity during exercise. Interestingly, mice lacking muscle FUNDC1 were protected against high-fat-diet-induced obesity with improved systemic insulin sensitivity and glucose tolerance despite reduced muscle mitochondrial energetics. Mechanistically, FUNDC1 deficiency elicited a retrograde response in muscle that upregulated FGF21 expression, thereby promoting the thermogenic remodeling of adipose tissue. Thus, these findings reveal a pivotal role of FUNDC1-dependent mitochondrial quality control in mediating the muscle-adipose dialog to regulate systemic metabolism.
journal_name
Cell Repjournal_title
Cell reportsauthors
Fu T,Xu Z,Liu L,Guo Q,Wu H,Liang X,Zhou D,Xiao L,Liu L,Liu Y,Zhu MS,Chen Q,Gan Zdoi
10.1016/j.celrep.2018.03.127subject
Has Abstractpub_date
2018-05-01 00:00:00pages
1357-1372issue
5issn
2211-1247pii
S2211-1247(18)30515-1journal_volume
23pub_type
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