Muscle atrophy induced by Dex is accompanied by the suppression of protein synthesis and the induction of protein catabolism, including two muscle-specific E3 ubiquitin ligases, muscle atrophy F-box (MAFbx, also known as atrogin-1) and muscle RING Finger 1 (MuRF-1). Here, FBXO32 is linked to muscle atrophy.