Abstract
(-)-Hydroxycitric acid (HCA) inhibits the deposition of fat in animals and humans, while the molecular mechanism is still unclear. The present study investigated the effect and mechanism of (-)-HCA's regulation of lipid, glucose, and energy metabolism in broiler chickens. The current results showed that (-)-HCA decreased the accumulation of lipid droplets and triglyceride content by reducing fatty acid synthase protein level and enhancing phosphorylation of acetyl-CoA carboxylase protein level. (-)-HCA accelerated carbohydrate aerobic metabolisms by increasing the activities of phosphofructokinase-1, pyruvate dehydrogenase, succinate dehydrogenase, and malate dehydrogenase. Furthermore, (-)-HCA increased adiponectin receptor 1 mRNA level and enhanced phospho-AMPKα, peroxisome proliferator-activated receptor gamma coactivator-1α, nuclear respiratory factor-1, and mitochondrial transcription factor A protein levels in broiler chickens. These data indicated that (-)-HCA reduced lipid droplet accumulation, improved glucose catabolism, and accelerated energy metabolism in broiler chickens, possibly via activation of adiponectin-AMPK signaling pathway. These results revealed the biochemical mechanism of (-)-HCA-mediated fat accumulation and the prevention of metabolic disorder-related diseases in broiler chickens.
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