Abstract
Diet is a critical factor in controlling adiposity and white adipose tissue (WAT) physiology. A high-fat diet (HFD) alters WAT function and affects AMP-activated protein kinase (AMPK) - a cellular sensor - dysregulating lipolysis and lipid metabolism in adipocytes. Otherwise, AMPK activation may attenuate oxidative stress and inflammation. Interest in natural therapies, such as carotenoid consumption or supplementation, is growing due to their health benefits. Carotenoids are lipophilic pigments present in vegetables and fruits, which cannot be synthesized by the human body. Interventions focused on ameliorating complications induced by a HFD indicate a positive contribution of the carotenoids to the AMPK activation. This review aims to outline the mechanism of carotenoids in the AMPK pathway in adipose tissue and their contribution in regulating adipogenesis. Different carotenoids can act as an agonist of the AMPK signaling pathway, activating upstream kinases, upregulating transcriptional factors, inducing WAT browning, and blocking adipogenesis. In addition, the improvement of some "homeostatic" factors, such as adiponectin, may mediate the AMPK activation induced by carotenoids. With these findings, we encourage clinical trials to confirm the role of carotenoids in the AMPK pathway in a long-term treatment, mainly in obesity cases.
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