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초록·키워드 목차

Animals show a sexual dimorphism in metabolic responses. We investigated to verify whether the peroxisome proliferator-activated receptor α (PPARα) agonist fenofibrate regulates obesity and skeletal muscle lipid metabolism with sexual dimorphism and to determine the changes in skeletal muscle expression of PPARα target genes. After both sexes of C57BL/6J mice received a high fat diet with or without fenofibrate for 7 weeks, we examined the effects of fenofibrate on not only body weight, adipose tissue mass, and skeletal muscle lipid accumulation, but also the mRNA expression of PPARα-related genes in skeletal muscle. Male mice given a fenofibrate-supplemented high fat diet showed decreased body weight gain and adipose tissue mass compared with mice fed a high fat diet alone, whereas fenofibrate did not reduce them in high fat diet-fed female mice. Lipid accumulation in skeletal muscle was inhibited by fenofibrate in male mice, but not in female mice. Gene expression analysis revealed that fenofibrate increased the mRNA levels of PPARα target enzymes only in male mice. Therefore, our results suggest that sex-dependence differences in obesity and intramuscular lipid levels under fenofibrate treatment could be due in part to the differences in skeletal muscle PPARα activation between male and female mice. #Fenofibrate #PPARα #Sex #Skeletal muscle #Lipid metabolism

INTRODUCTION
MATERIALS AND METHODS
RESULTS AND DISCUSSION
REFERENCES

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