Abstract
Obesity is one of the most serious health problems in both Westernized and developing countries. AMP-activated protein kinase (AMPK) has emerged as a major regulator of appetite, body weight, and cellular energy balance. In this study, we investigated the effect of esculetin (ECT) on adipogenesis via activation of AMPK in 3T3-L1 cells. ECT markedly inhibited lipid accumulation and suppressed the expression of adipogenic specific proteins including peroxisome proliferator-activated receptors (PPARγ), CCAAT/enhancer binding protein a (C/EBPα), and adipocyte fatty acid binding protein (aP2). Moreover, ECT significantly increased phosphorylation of AMPK and acetyl-CoA carboxylase (ACC) and intracellular reactive oxygen species (ROS) production. However, pretreatment with compound C, a specific AMPK inhibitor, abolished the inhibitory effects of ECT on PPARγ and C/EBPα expression. Therefore, these results indicate that ECT has anti-adipogenic effects through modulation of PPARγ and C/EBPα via the AMPK signaling pathway.
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