ArticleDiabetes2025
Deubiquitinating Enzyme USP2 Alleviates Muscle Atrophy by Stabilizing PPAR-γ.
Article in Diabetes, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Peroxisome proliferator-activated receptor gamma (PPARγ) as a mechano-metabolic transducer: coordinating lipid homeostasis through mechanical cues.Molecular biomedicine · 2026Review
- Ubiquitin-Specific Protease 2 (USP2) as a Modulator of Energy Metabolism: A Review of Studies Using Animal and Cellular Models.Biomedicines · 2026Review
- Suppression of USP2 in mouse skeletal muscle: a model of oxidative stress in muscle tissue.Experimental animals · 2026Article
- Development and validation of a machine learning-based sarcopenia prediction model using the triglyceride glucose-frailty index.The Journal of international medical research · 2026Article
- Lactate orchestrates the TGFβ pathway and ferroptosis nexus in organ fibrosis via USP2 lactylation.Communications biology · 2025Article
- Exploring and Validating the Molecular Mechanisms Linking Fatty Acid Metabolism and Sarcopenia.IET systems biologyArticle
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Authors and funding
8 authors.
Funding
Abstract
Insulin resistance, a hallmark of type 2 diabetes, accelerates muscle breakdown and impairs energy metabolism. However, the role of ubiquitin specific peptidase 2 (USP2), a key regulator of insulin resistance, in sarcopenia remains unclear. Peroxisome proliferator-activated receptor γ (PPAR-γ) plays a critical role in regulating muscle atrophy. The role of deubiquitinase USP2 in mitigating muscle atrophy was investigated. Our findings revealed reduced USP2 expression in skeletal muscles of patients with type 2 diabetes. In mouse models of diabetes- and dexamethasone (DEX)-induced muscle atrophy, USP2 expression was downregulated in skeletal muscles. Usp2 knockout exacerbated muscle loss and functional impairment induced by diabetes or DEX. Moreover, skeletal muscle-specific Usp2 knockout further aggravated muscle loss and functional impairment induced by diabetes. Local injection of adeno-associated virus-Usp2 into the gastrocnemius muscles of diabetic mice increased muscle mass and improved skeletal muscle performance and endurance. It enhanced insulin sensitivity in diabetic mice, shown by lower fasting serum glucose and insulin levels and better glucose tolerance. Mechanistic analysis showed USP2 directly interacted with PPAR-γ by deubiquitinating it, stabilizing its protein levels, enhancing insulin signaling and sensitivity, and maintaining muscle mass. Loss of PPAR-γ abolishes the regulatory effects of USP2 on insulin sensitivity and muscle atrophy. MYOD1 activates USP2 transcription by binding to its promoter region. This study demonstrates the protective role of USP2 in mitigating muscle atrophy by stabilizing PPAR-γ through deubiquitination, particularly in models of diabetic and DEX-induced muscle atrophy. Targeting the USP2-PPAR-γ axis may offer promising therapeutic strategies for metabolic disorders and sarcopenia. ARTICLE HIGHLIGHTS:
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