AUF1 gene transfer increases exercise performance and improves skeletal muscle deficit in adult mice.

AUF1 gene transfer increases exercise performance and improves skeletal muscle deficit in adult mice.
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DOI:
10.1016/j.omtm.2021.07.005
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发表时间:
2021-09-10
期刊:
Molecular therapy. Methods & clinical development
影响因子:
--
通讯作者:
Schneider RJ
Schneider RJ
中科院分区:
其他
文献类型:
--
作者:
Abbadi D;Andrews JJ;Katsara O;Schneider RJ

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Muscle function and mass begin declining in adults long before evidence of sarcopenia and include reduced mitochondrial function, although much remains to be characterized. We found that mRNA decay factor AU-rich mRNA binding factor 1 (AUF1), which stimulates myogenesis, is strongly reduced in skeletal muscle of adult and older mice in the absence of evidence of sarcopenia. Muscle-specific adeno-associated virus (AAV)8-AUF1 gene therapy increased expression of AUF1, muscle function, and mass. AAV8 AUF1 muscle gene transfer in 12-month-old mice increased the levels of activated muscle stem (satellite) cells, increased muscle mass, reduced markers of muscle atrophy, increased markers of mitochondrial content and muscle fiber oxidative capacity, and enhanced exercise performance to levels of 3-month-old mice. With wild-type and AUF1 knockout mice and cultured myoblasts, AUF1 supplementation of muscle fibers was found to increase expression of Peroxisome Proliferator-activated Receptor Gamma Co-activator 1-alpha (PGC1α), a major effector of skeletal muscle mitochondrial oxidative metabolism. AUF1 stabilized and increased translation of the pgc1α mRNA, which is strongly reduced in adult muscle in the absence of AUF1 supplementation. Skeletal muscle-specific gene transfer of AUF1 therefore restores muscle mass, increases exercise endurance, and may provide a therapeutic strategy for age-related muscle loss. Abbadi, Schneider, and colleagues demonstrate that skeletal muscle AUF1 declines with age in mice, contributing to reduced muscle mass and function. Muscle-specific AAV8-AUF1 gene transfer in adult mice increases muscle stem cell activation, muscle mass, and exercise endurance to the level of young animals in part by increasing PGC1α.
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