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- W2803742055 abstract "Scope l-citrulline has recently been reported as a more effective supplement for promoting intracellular nitric oxide (NO) production compared to l-arginine. Here, the effect of l-citrulline on skeletal muscle and its influence on exercise performance were investigated. The underlying mechanism of its effect, specifically on the expression of skeletal muscle peroxisome proliferator-activated receptor-gamma coactivator-1α (PGC-1α), was also elucidated. Methods and results Six-week-old ICR mice were orally supplemented with l-citrulline (250 mg kg−1) daily, and their performance in weight-loaded swimming exercise every other day for 15 days, was evaluated. In addition, mice muscles were weighed and evaluated for the expression of PGC-1α and PGC-1α-regulated genes. Mice orally supplemented with l-citrulline had significantly higher gastrocnemius and biceps femoris muscle mass. Although not statistically significant, l-citrulline prolonged the swimming time to exhaustion. PGC-1α upregulation was associated with vascular endothelial growth factor α (VEGFα) and insulin-like growth factor 1 (IGF-1) upregulation. VEGFα and IGF-1 are important for angiogenesis and muscle growth, respectively, and are regulated by PGC-1α. Treatment with NG-nitro-l-arginine methyl ester hydrochloride (l-NAME), a nitric oxide synthesis inhibitor, suppressed the l-citrulline-induced PGC-1α upregulation in vitro. Conclusion Supplementation with l-citrulline upregulates skeletal muscle PGC-1α levels resulting in higher skeletal muscle weight that improves time to exhaustion during exercise." @default.
- W2803742055 created "2018-06-01" @default.
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- W2803742055 date "2018-06-25" @default.
- W2803742055 modified "2023-10-03" @default.
- W2803742055 title "<scp>l</scp> ‐Citrulline Supplementation‐Increased Skeletal Muscle PGC‐1α Expression Is Associated with Exercise Performance and Increased Skeletal Muscle Weight" @default.
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- W2803742055 doi "https://doi.org/10.1002/mnfr.201701043" @default.
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