Main content area

Proteomic Study on Usnic-Acid-Induced Hepatotoxicity in Rats

Liu, Qian, Zhao, Xiaoping, Lu, Xiaoyan, Fan, Xiaohui, Wang, Yi
Journal of agricultural and food chemistry 2012 v.60 no.29 pp. 7312-7317
clinical trials, dietary supplements, endoplasmic reticulum, gene expression regulation, hepatotoxicity, lipid metabolism, mass spectrometry, mitochondria, oxidative stress, protein synthesis, proteins, proteomics, rats, two-dimensional gel electrophoresis, usnic acid, weight loss
Usnic acid, a lichen metabolite, is used as a dietary supplement for weight loss. However, clinical studies have shown that usnic acid causes hepatotoxicity. The present study aims to investigate the mechanism of usnic acid hepatotoxicity in vivo. Two-dimensional gel electrophoresis coupled with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was used to analyze the expression profiles of differentially regulated and expressed proteins in rat liver after usnic acid administration. The results reveal the differential expression of 10 proteins in usnic-acid-treated rats compared to the normal controls. These proteins are associated with oxidative stress, lipid metabolism, and several other molecular pathways. The endoplasmic reticulum and mitochondria may be the primary targets of usnic-acid-induced hepatotoxicity.