Sesamol improves inflammation and insulin resistance in adipose tissue of obese mice by regulating macrophage polarization
10.12092/j.issn.1009-2501.2020.07.002
- VernacularTitle: 芝麻酚调控巨噬细胞极化改善肥胖小鼠脂肪组织炎症及胰岛素抵抗
- Author:
Xiang KONG
1
Author Information
1. Department of Endocrinology, Yijishan Hospital, The First Affiliated Hospital of Wannan Medical College
- Publication Type:Journal Article
- Keywords:
Macrophage polarization;
Obese mice;
Sesamol
- From:
Chinese Journal of Clinical Pharmacology and Therapeutics
2020;25(7):728-733
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To investigate whether sesamol can improve inflammation and insulin resistance in adipose tissue of obese mice by regulating macrophage polarization. METHODS: An obese animal model was established in mice by inducing obesity with high-fat diet. The obese mice were administrated with sesamol (100 mg/kg) for 8 weeks. The mice were sacrificed after the intraperitoneal glucose tolerance test and insulin tolerance test, and the plasma lipid and insulin levels were measured. The expression of P-AKT and P-JNK in adipose tissue of epididymis was detected by Western blotting. F4/80 and Cd11c immunohistochemistry and immunofluorescence staining were performed on the adipose tissue sections. The mRNA expression of cytokines and chemokines in adipose tissue was measured by Real-time fluorescence quantitative PCR. RESULTS: Sesamol treatment reduced body weight and lipid level of obese mice, improved glucose tolerance and insulin resistance. In sesamol treated group, macrophage infiltration in adipose tissue was decreased, P-AKT expression was enhanced, P-JNK expression was reduced, mRNA expression of M1 type of macrophage markers (Cd11c, iNOS, TNF-α and IL-6) was down-regulated, mRNA expression of M2 type markers (chi3l3, Arg1 and Mgl1) was up-regulated. CONCLUSION: Sesamol can alleviate inflammation and insulin resistance in adipose tissue of obese mice. These effects may be associated with inhibition of JNK signal pathway and improvement of polarization imbalance of macrophages in adipose tissue.
