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Short-Term Zinc Supplementation Stimulates Visceral Adipose Catabolism and Inflammation in Mice
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Short-Term Zinc Supplementation Stimulates Visceral Adipose Catabolism and Inflammation in Mice
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Journal Article
Short-Term Zinc Supplementation Stimulates Visceral Adipose Catabolism and Inflammation in Mice
2024
Overview
Background: Zinc (Zn), a fundamental trace element in human biology, exhibits pivotal roles in sustaining vital physiological processes and regulating metabolic homeostasis. Insufficient zinc intake has been linked to deleterious consequences on growth, reproductive functions, metabolic activities, and immune responses in both humans and animals. Oral zinc supplementation is usually performed to meet zinc requirement. Previous studies have shown that long-term supplementation of zinc in mice impaired AKT signaling and induced adipocyte hypertrophy in visceral adipose tissue. Methods: The presented study was conducted to investigate the role and mechanism of short-term zinc supplementation on lipids metabolism. Zinc sulfate was supplemented in the drinking water of C57/BL6J male mice at 30 ppm or 90 ppm for one week. Water consumption, food intake, and body weight were analyzed, adipose tissue and serum profile of metabolites were investigated, and the key genes related to lipid metabolism were analyzed. Results: Short-term zinc supplementation decreased visceral adipose tissue weight and adipocyte size compared to the control group, but no difference was observed in food intake, water consumption, and body weight between the two groups. Further studies revealed that short-term zinc supplementation significantly increased the serum insulin level while decreasing the serum NEFA content. In addition, zinc supplementation increased the expression of Atgl and Hsl in the visceral adipose tissue compared with the control mice. Furthermore, the phosphorylation level of HSL and protein level of PPARg in the epididymal adipose tissue increased by zinc supplementation compared with the control mice. In comparison, the protein level of FASN was down-regulated by short-term zinc supplementation in the epididymal adipose tissue, although the expression of lipogenic genes was not changed. The expression of F4/80 and Tnfa were increased in zinc-supplemented adipose tissue as compared with the control group. Conclusions: Our findings suggest that short-term zinc supplementation might reduce fat deposition by enhancing lipolysis in mice. Future studies could focus on the effect of intermittent zinc supplementation on fat reduction in both animal models and humans.
Publisher
MDPI AG,MDPI
Subject
/ Animals
/ Body fat
/ Enzymes
/ Genes
/ Glucose
/ Insulin
/ Intra-Abdominal Fat - drug effects
/ Intra-Abdominal Fat - metabolism
/ Lipid Metabolism - drug effects
/ Lipids
/ Male
/ Mice
/ Sterol Esterase - metabolism
/ Sulfates
/ Zinc - administration & dosage
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