Regulatory Technology
Yang Huan, Wang Pengquan, Han Shaocong, Li Yanjuan, Yang Huiqiong, Zhang Min, Tang Yanmei, Shi Tingting, Yang Xingxin
Objective: To investigate the mechanism of Rabdosia rubescens against metabolic-associated fatty liver disease (MAFLD) base on metabonomics. Methods: Male SD rats were randomly divided into groups of normal, model, fenofibrate, low-dose and high-dose Rabdosia rubescens. The MAFLD rat model was induced by a high-fat diet for 12 weeks, with daily gavage administration of the respective drug interventions. The body weight and food intake of rats were recorded. The liver index was measured. The levels of total cholesterol (TC), triglyceride (TG), low density lipoprotein cholesterol (LDL-C), alanine aminotransferase (ALT), and aspartate aminotransferase (AST) in serum and liver were detected, along with the levels of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione (GSH), tumour necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and interleukin-6 (IL-6) in the liver. Oil red O and hematoxylin-eosin (HE) staining were used to observe liver histopathology. Ultra-high performance liquid chromatography tandem mass spectrometry (UPLC/MS) technology was used to detect the level of endogenous metabolites in the serum and liver of rats, and principal component analysis and orthogonal partial least squares discriminant analysis were used to screen and identify differential metabolites. MetaboAnalyst platform was used for metabolic pathway analysis. Results: Compared with the results in the model group, the body weight and liver index of rats in the Rabdosia rubescens administration group significantly reduced (P<0.001), and the liver histopathological abnormalities improved. The levels of TC, TG, LDL-C, ALT, and AST in serum and liver significantly decreased (P<0.05, P<0.01, P<0.001). The levels of MDA, TNF-α, IL-1β, and IL-6 in the liver significantly decreased (P<0.05, P<0.01, P<0.001), and GSH and SOD levels significantly increased (P<0.05, P<0.001). A total of 41 potential differential metabolites related to MAFLD were screened by serum and liver metabonomics, and 20 differential metabolites were regulated in the Rabdosia rubescens administration group, which mainly involved 5 metabolic pathways including glycerophospholipid metabolism, arginine biosynthesis, pantothenate and CoA biosynthesis, cofactors biosynthesis, and pentose and glucuronate interconversions. Conclusion: Rabdosia rubescens effectively improved the lipid metabolism disorders caused by MAFLD and alleviated oxidative stress and inflammation in the liver, which may be related to regulating lipid, amino acid, carbohydrate, cofactors and vitamins metabolism.