GADD45A is a mediator of mitochondrial loss, atrophy, and weakness in skeletal muscle. - Marcotte GR; Miller MJ; Kunz HE; Ryan ZC; Strub MD; Vanderboom PM; Heppelmann CJ; Chau S; Von Ruff ZD; Kilroe SP; McKeen AT; Dierdorff JM; et al. (JCI insight, 2023)