Circadian rhythmic disorders induced by high-fat diet are associated with
metabolic diseases.
Resveratrol could improve metabolic disorder, but few reports focused on its effects on
circadian rhythm disorders in a variety of studies. The aim of the present study was to analyze the potential effects of
resveratrol on high-fat diet-induced disorders about the rhythmic expression of clock genes and clock-controlled lipid metabolism. Male C57BL/6 mice were divided into three groups: a standard diet control group (CON), a high-fat diet (HFD) group and HFD supplemented with 0.1% (w/w)
resveratrol (RES). The
body weight, fasting
blood glucose and
insulin, plasma
lipids and
leptin, whole body metabolic status and the expression of clock genes and clock-controlled lipogenic genes were analyzed at four different time points throughout a 24-h cycle (8:00, 14:00, 20:00, 2:00).
Resveratrol, being associated with rhythmic restoration of fasting
blood glucose and plasma
insulin, significantly decreased the
body weight in HFD mice after 11 weeks of feeding, as well as ameliorated the rhythmities of plasma
leptin,
lipid profiles and whole body metabolic status (respiratory exchange ratio, locomotor activity, and heat production). Meanwhile,
resveratrol modified the rhythmic expression of clock genes (Clock, Bmal1 and Per2) and clock-controlled lipid metabolism related genes (
Sirt1, PparĪ±,
Srebp-1c, Acc1 and Fas). The response pattern of
mRNA expression for Acc1 was similar to the plasma
triglyceride. All these results indicated that
resveratrol reduced lipogenesis and ultimately normalized rhythmic expression of plasma
lipids, possibly via its action on clock machinery.