Quercetin Enhances Brown Adipose Tissue Thermogenesis and Improves Glucose-Lipid Metabolism via the COX2-PGE2-EP4-UCP1 Signaling Axis
Abstract
The activation of thermogenesis in brown adipose tissue (BAT) represents a pivotal target for ameliorating disorders of glucose and lipid metabolism. This study sought to elucidate the regulatory effects of quercetin on thermogenesis and glucose-lipid metabolism within brown adipocytes, alongside its underlying molecular mechanisms. The findings demonstrated that quercetin markedly upregulated the expression of uncoupling protein 1 (UCP1), a critical thermogenic protein in brown adipocytes, thereby enhancing cellular thermogenic capacity and effectively mitigating glucose and lipid metabolism disorders. Subsequent mechanistic investigations confirmed that quercetin activated the COX2-PGE2-EP4-UCP1 signaling axis by augmenting the stability of cyclooxygenase 2 (COX2) protein, thus mediating its thermogenic-promoting and metabolism-improving effects. This study identifies quercetin as a potential therapeutic agent for the improvement of glucose and lipid metabolism disorders, uncovers a novel molecular mechanism through which quercetin regulates brown adipocyte thermogenesis, and provides a theoretical and experimental foundation for the application of quercetin in the prevention and treatment of obesity and related metabolic diseases.
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