Cyanidin-3-O-β-glucoside improves obesity and triglyceride metabolism in KK-Aymice by regulating lipoprotein lipase activity

Abstract

Cyanidin-3-O-β-glucoside (Cy-3-g)-rich foods have been reported to inhibit the onset of obesity, but whether the pure anthocyanin supplementation affects obesity remains uncertain. Cy-3-g supplementation significantly reduced obesity, accumulation of fat in visceral adipose and liver tissues, and plasma triglyceride levels. Furthermore, adenosine monophosphate (AMP)-activated protein kinase phosphorylation (pAMPK) in the skeletal muscle and visceral adipose were significantly increased by Cy-3-g consumption. This was followed by the activation of lipoprotein lipase (LPL) in plasma and skeletal muscle but the suppression of this enzyme in visceral adipose. LPL activation in skeletal muscle cells and its suppression in adipocytes by Cy-3-g were blocked by inhibition of pAMPK. Our present data thus demonstrate that Cy-3-g improves obesity and triglyceride metabolism in KK-Ay mice. The underlying mechanism is found to be partly related to the activation of LPL in plasma and skeletal muscle, and inhibition of LPL in adipose tissue following the activation of pAMPK.