Dietary Tomato Pectin Attenuates Hepatic Insulin Resistance and Inflammation in High-Fat-Diet Mice by Regulating the PI3K/AKT Pathway

• Published in: Foods 2024-01, Vol.13 (3), p.444
• Main Authors: Sun, Jing, Wu, Kongyan, Wang, Pan, Wang, Yubin, Wang, Dan, Zhao, Wenting, Zhao, Yuanyuan, Zhang, Chunhong, Zhao, Xiaoyan
• Format: Article
• Language: English
• Subjects: 1-Phosphatidylinositol 3-kinase; AKT protein; Blood levels; Blood sugar; Diet; Ethylenediaminetetraacetic acid; Global health; Glucose; Glucose tolerance; Health aspects; High fat diet; Homeostasis; Inflammation; Insulin; Insulin resistance; Kinases; Laboratory animals; Lipids; Liver; Liver diseases; Metabolic disorders; Obesity; Oils & fats; Oxidation resistance; Oxidative stress; Pectin; Pharmacology; PI3K/AKT pathway; Polysaccharides; Proteins; Public health; tomato pectin; Tomatoes; Tumor necrosis factor-TNF; World health
• ISSN: 2304-8158; 2304-8158
• DOI: 10.3390/foods13030444

Chronic metabolic disease is a serious global health issue, which is accompanied by impaired insulin resistance. Tomato pectin (TP) is a naturally soluble complex hetero-polysaccharide with various biological functions. However, the impact of TP on hepatic insulin resistance in a high-fat diet (HFD) and its potential mechanism remains largely unknown. The results revealed that TP treatment significantly decreased the liver weight, hepatic fat accumulation and hepatic injury in HFD-fed mice. TP also improved fasting blood glucose levels and glucose tolerance in HFD-fed mice. The underlying mechanisms involved in the inflammation, oxidative stress and insulin signaling in the liver were also investigated by RT-qPCR and western blot, which indicated that TP ameliorated hepatic insulin resistance by regulating the PI3K/AKT/GSK-3β pathway, increasing the expression of GLUT4, decreasing the expression of PECK and G6P as well as restoring antioxidant activities and suppressing the inflammation statues in HFD-fed mice. Our data showed that dietary TP has profound effects on hepatic insulin resistance, inflammation and oxidative stress, demonstrating that TP might be a promising therapeutic agent against insulin resistance and related chronic metabolic disease.