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1140A AASLD ABSTRACTS HEPATOLOGY, October, 2015 1910 The role of CD36 in acetaminophen-induced hepatotoxicity in mice chen zhang 1 , Xianmin Mu 1 , Che Xu 1 , Shi Hu 1 , Yuanfang Lu 1 , Qiang You 1,2 ; 1 Department of Biotherapy, Second Affiliated Hospital, Nanjing Medical University, Nanjing, China; 2 Department of Immunology, Nanjing Medical University, Nanjing, China Acetaminophen (APAP) overdose cause hepatotoxicity, and even acute liver failure, which involves a series of critical events including APAP metabolite protein adduct formation, mitochondrial dysfunction, oxidant stress, peroxynitrite formation and nuclear DNA fragmentation. Recent <strong>studies</strong> indicate that sterile inflammation and innate immune cells may play important roles in APAP-induced liver injury and repair. CD36 is a member of the class B scavenger receptor family of cell surface proteins. It binds a variety of ligands including collagen, thrombospondin, erythrocytes parasitized with Plasmodium falciparum, oxidized low density lipoprotein, native lipoproteins, oxidized phospholipids, and long-chain fatty acids. CD36 also assembles with Toll-like receptor 4 and 6 to promote sterile inflammation. The present study aims to investigate the role of CD36 in APAP induced murine liver injury. Methods: WT C57BL/6J and CD36 -/- mice on same background were intraperitoneally injected with APAP (300mg/kg) after fasting for 16h. The blood and liver tissues were collected at 8h and 24h after treatment. Liver injury was evaluated by serum ALT level and liver tissue H&E staining. Liver inflammatory factors expression was determined by real time PCR. The metabolite of APAP, N-acetyl-p-benzoquinone imine (NAPQI) protein adducts, and Cytochrome P450 2E1 (CYP2E1) level were measured by Western blot. Liver infiltrating macrophages and neutrophils were characterized by flow cytometry. Results: Compared with WT mice, APAP treated CD36 -/- mice show less liver injury indicated by serum ALT level and liver tissue H&E staining. There was no significant difference in NAPQI-protein adducts and CYP2E1 expression between these two strains. However, less IL-1β and CXCL1 mRNA expression were observed in APAP treated CD36 -/- mice as well as infiltrating macrophages and neutrophils. Conclusion: APAP treated CD36 -/- mice have less liver damage than WT mice which correlates with the extent of inflammation. CD36 could be a new target to reduce APAP-induced liver injury. Disclosures: The following authors have nothing to disclose: chen zhang, Xianmin Mu, Che Xu, Shi Hu, Yuanfang Lu, Qiang You 1911 Withaferin-A Reduces Acetaminophen-Induced Liver Injury in Mice Ravirajsinh Jadeja 1 , Nathalie H. Urrunaga 2 , Suchismita Dash 2 , Neeraj K. Saxena 2 , Sandeep Khurana 1 ; 1 Gastroenterology and Hepatology, Georgia Regents University, Augusta, MD; 2 Gastroenterology and Hepatology, University of Maryland School of Medicine, Baltimore, MD Acetaminophen (APAP) overdose induces oxidative stress that leads to hepatocyte necrosis. Withaferin-A (WA), a lactone, has anti-oxidant activities however, its therapeutic potential in APAP hepatotoxicity is unknown. The aim of our study was to assess the therapeutic potential of WA in a mouse model that mimics APAP-induced liver injury (AILI) in humans. Overnight fasted C57BL/6NTac male mice (56 wk. old) received 200 mg/kg APAP intraperitoneally (i.p.). An hour later mice were treated with 40 mg/kg WA or vehicle i.p., and euthanized at 4 and 16 h; their livers were harvested and serum collected for analysis. At 4 h, compared to vehicle-treated mice, WA-treated mice had reduced serum ALT levels (P < 0.05), hepatocyte necrosis (P
HEPATOLOGY, VOLUME 62, NUMBER 1 (SUPPL) AASLD ABSTRACTS 1141A bumin (HNA). Out of the 354 subjects, 68 were analyzed for HSA functional changes. We examined the radical scavenging activity of purified HSA by monitoring the absorbance of diphenylpicrylhydrazyl (DPPH) radicals and the affinity of the purified HSA using ketoprofen. Analysis of variance (ANOVA) followed by the Tukey’s method, Jonckheere-Terpstra (JT) test, receiver operating characteristic curves (ROC), and Pearson’s correlation were used for statistical analysis. Results: The radical scavenging ability and binding capacity of HSA significantly deteriorated with the severity of the disease (P
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1000A AASLD ABSTRACTS HEPATOLOGY, O
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1312A AUTHOR INDEX HEPATOLOGY, Octo
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1366A CATEGORY INDEX HEPATOLOGY, Oc
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