Mitophagy Directs Muscle-Adipose Crosstalk to Alleviate Dietary Obesity.

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 Rep

journal_title

Cell reports

authors

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 Z

doi

10.1016/j.celrep.2018.03.127

subject

Has Abstract

pub_date

2018-05-01 00:00:00

pages

1357-1372

issue

5

issn

2211-1247

pii

S2211-1247(18)30515-1

journal_volume

23

pub_type

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