Introduction: Animal studies suggest that advanced glycation end products (AGEs) and their interaction with receptor for AGEs (RAGE) are involved in sarcopenia, but their relationship in human skeletal muscles has yet to be elucidated. We aimed to determine whether RAGE expression in human skeletal muscle is associated with serum AGE levels and sarcopenia-related changes. Methods: We retrospectively reviewed 33 consecutive women (mean age, 65 years) with distal radius fracture who had consented to donate a sample of forearm muscle for research purposes, which was taken during surgical fracture repair. The muscle RAGE expression was measured with immunohistochemistry staining and serum AGE levels using ELISA method. We compared RAGE expression and AGE levels in patients with and without sarcopenia. We also correlated RAGE expression with such clinical parameters as demographic factors, as well as sarcopenia-related changes, including grip strength, appendicular skeletal muscle mass, and muscle cross-sectional area (CSA) ratios. Results: Twelve patients (36%) were diagnosed with sarcopenia. They had a significantly higher RAGE expression (p = 0.044) and AGE level (p < 0.001) than those without sarcopenia. The RAGE expression correlated significantly with a high AGE level (r = 0.510, p = 0.011) and correlated inversely with a muscle CSA ratio (r = −0.696, p < 0.001). Discussion: This study shows that RAGE expression increases in sarcopenic patient skeletal muscles. This expression also correlates positively with serum AGE levels and inversely with muscle CSA ratios. Further studies are necessary to determine whether targeting RAGEs can be a therapeutic option for sarcopenia.

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