The therapeutic detoxification of chlorogenic acid against acetaminophen-induced liver injury by ameliorating hepatic inflammation.

Chlorogenic acid (CGA) has been reported to prevent acetaminophen (AP)-induced hepatotoxicity when mice were pre-administered orally with CGA for consecutive 7days before AP intoxication in our previous study. This study investigated the therapeutic detoxification of CGA against AP-induced hepatotoxicity and the engaged mechanism. The mice were orally administered with CGA (10, 20, 40mg/kg) at 1h after given AP (400mg/kg), and another 3h later the mice were killed for the following experiments. Results of serum transaminases analysis and histological evaluation demonstrated the detoxification of CGA against AP-induced hepatotoxicity. CGA reduced AP-induced the increased myeloperoxidase (MPO) enzymatic activity and its expression. CGA reduced AP-induced the increased liver expression of toll-like receptor (TLR)-3/4 and MyD88, and the increased phosphorylation of inhibitor of kappa B (IκB) and p65 subunit of nuclear factor κB (NFκB). CGA reduced AP-induced the increased NFκBp65 expression in nucleus. In addition, CGA reduced AP-induced the increased serum levels and liver mRNA expression of tumor necrosis factor alpha (TNFα), interleukin (IL)-1β, IL-6, monocyte chemoattractant protein-1 (MCP-1), and keratinocyte chemoattractant (KC). Taken together, our results demonstrate the therapeutic detoxification of CGA against AP-induced liver injury, and TLR3/4 and NFκB signaling pathway are involved in such process.