Affiliation:
1. College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
2. Beijing Key Laboratory of Agricultural Products of Fruits and Vegetables Preservation and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Institute of Agri-Food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, No. 50 Zhanghua Street, Haidian District, Beijing 100097, China
Abstract
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.
Funder
National Natural Science Foundation of China
Excellent Young Scientist Fund of Beijing Academy of Agricultural and Forestry Sciences
Young Investigator Fund of Beijing Academy of Agricultural and Forestry Sciences
Young Talen Award of Beijing Academy of Agricultural and Forestry Sciences
Collaborative Innovation Center of Beijing Academy of Agricultural and Forestry Sciences
Scientific and Technological Innovation Ability Foundation of Beijing Academy of Agricultural and Forestry Sciences
China Agriculture Research System of MOF and MRAR
Subject
Plant Science,Health Professions (miscellaneous),Health (social science),Microbiology,Food Science