Expression of genes involved in carbohydrate-lipid metabolism in muscle and fat tissues in the initial stage of adult-age obesity in fed and fasted mice.

C57Bl mice exhibit impaired glucose metabolism by the late adult age under standard living conditions. The aim of this study was to evaluate white adipose tissue (WAT), brown adipose tissue (BAT), and skeletal muscle expression of genes involved in carbohydrate-lipid metabolism at postpubertal stages preceding the late adult age in C57Bl mice. Muscle mRNA levels of uncoupling protein 3 () and carnitine palmitoyltransferase 1 () (indicators of FFA oxidation), WAT mRNA levels of hormone-sensitive lipase () and lipoprotein lipase () (indicators of lipolysis and lipogenesis), muscle and WAT mRNA levels of the type 4 glucose transporter (indicators of insulin-dependent glucose uptake), and BAT mRNA levels of uncoupling protein 1 () (indicator of thermogenesis) were measured in fed and 16 h-fasted mice in three age groups: 10-week-old (young), 15-week-old (early adult), and 30-week-old (late adult).