Protective effect of R. glutinosa oligosaccharides against high L-carnitine diet-induced endothelial dysfunction and hepatic injury in mice

International Journal of Biological Macromolecules
Wenfeng LiXingbin Yang

Abstract

Current research for the first time demonstrated that endothelial dysfunction and hepatic injury in mice were induced by ingestion of 3% l-carnitine water for consecutive 10 weeks. Interestingly, oral administration of dietary raffinose family oligosaccharides (RFOs) at 400 and 800 mg/kg bw significantly reduced the impact of l-carnitine on the serum total cholesterol, triglycerides, high- and low-density lipoproteins, alanine aminotransferase, aspartate amino-transferase, NO, endothelin-1 and C-reactive protein. Furthermore, l-carnitine-induced elevation of hepatic lipid contents and malonaldehyde formation, and the inhibition of SOD and GSH-Px activities in mice were markedly ameliorated by oral administration of RFOs. Moreover, histopathology of H&E and Oil Red O staining of the liver also confirmed the protective effect of RFOs against hepatic steatosis and oxidative injury induced by high l-carnitine diet in mice. These findings for the first time suggest that RFOs may alleviate endothelial dysfunction and liver injury from ingestion of high l-carnitine diet.

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