Females Are Completely Resistant to Semaglutide-Induced Muscle Loss in ob/ob Mice.

Rout, Subhasmita; Karasawa, Takuya; Watanabe, Shinya; Chaix, Amandine; Drummond, Micah J; Funai, Katsuhiko; Choi, Ran Hee · Diabetes · 2026

basic_science · Level V

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Abstract

Female C57BL/6 J mice are relatively resistant to weight gain, which complicates the study of sex-specific metabolic responses. So, we used ob/ob mice to examine semaglutide-induced weight loss in both sexes. We wanted to determine whether semaglutide-induced weight loss produces sex-specific effects on skeletal muscle mass and function in ob/ob mice. Semaglutide had minimal effects on skeletal muscle mass and strength in ob/ob mice. In particular, females were completely resistant to loss of muscle mass. These findings reveal that semaglutide exerts sex-specific effects, highlighting a need for further research into the molecular mechanisms driving these distinct protective outcomes.