No existing animal model of alcoholic liver disease faithfully recapitulates the pathological features of advanced forms of Vemurafenib molecular weight AH; therefore, this study aimed to develop an acute-on-chronic alcoholic liver disease model by combining chronic low-dose treatment with carbon tetrachloride (CCl4) or 3, 5-diethoxycarbonyl-1, 4-dihydrocollidine (DDC) to induce hepatic fibrosis with the intragastric alcohol feeding protocol. Methods: We evaluated several study designs using C57BL6/J mice (male, 9 weeks of age). First, increasing duration of CCl4 treatment (0.2 ml/kg, 2× weekly i.p. for up to 6 weeks) were used to induce

chronic liver fibrosis. Second, feeding DDC (up to 0.1 % w/w, 4 weeks) in the diet resulted in chronic liver fibrosis and cholestasis. Alcohol (up to 27 g/ kg/day for up to 28 days) was administered intragastrically at the end of the pro-fibrogenic treatments. Results: We observed increased mortality in the experimental groups which were treated first with CCl4 for 6 weeks then administered alcohol intragastrically in combination with continuous treatment PD-0332991 ic50 with CCl4 (0.1 ml/kg, 2× week) (CCl4+CCl4+EtOH) and mice treated

with DDC diet for 4 weeks then administered alcohol intragastrically in combination with continuous treatment with DDC diet (0.05 %( w/w), 4 weeks) (DDC+DDC+EtOH). We observed increased exacerbation of liver and kidney injury only in mice of CCl4+CCl4+EtOH group. The liver and kidney histopathological evaluation, as well as other histological and molecular markers were evaluated. Conclusions: High mortality in mice with liver fibrosis that were treated with alcohol was associated with both liver and kidney injury, similar to AH in humans. The mouse models evaluated in this study reproduce features of an acute-on-chronic type clinical scenario with many features of AH. Disclosures: Ramon Bataller – Advisory Committees or Review Panels: Sandhill; Consulting: VTI The following people have nothing to disclose: MCE Shinji Furuya, Takeki Uehara, Yuki Kato, Oksana Kosyk, Gemma Odena,

Hiroshi Kono, Ivan Rusyn Purpose: 5-HT7 receptors, those central effects are well known, are also included in peripheral phenomenon. Paracetamol (PARA) has a reasonable safety profile when consumed in therapeutic doses. However, it could induce hepatotoxicity and even acute liver failure when taken at an overdose. This study aimed to determine potential role of peripheral liver 5-HT7 receptors during PARA induced hepatotoxicity in mice. Methods: 105 mice were divided into 7 groups as each composed of 15 rats: 1) Control, 2) PARA (400 mg/kg, po), 3) PARA+ agonist 5 mg/kg (ip), 4) PARA+ agonist 10 mg/kg (ip), 5) PARA+ antagonist 10 mg/kg (ip), 6) PARA+ antagonist 20 mg/kg (ip), 7) PARA+agonist 10 mg/kg+antagonist 20 mg/ kg (ip). 5 mice per group were sacrificed in three different time points (4, 8 and 12 hours after PARA administration). Blood and tissue samples were collected.