Starch:oleate appears no more healthful, and potentially more harmful, than other CHO:fat combinations. Disclosures: Scott M. Turner – Employment: KineMed, Rapamycin order Inc. Carine Beysen – Employment: KineMed, Inc; Stock Shareholder: KineMed, Inc The following people have nothing to disclose: Caroline C. Duwaerts, Andrew Pierce, Mark D. Fitch, James P. Grenert, Jacquelyn J. Maher Background: Oxidative stress (OS)-induced chronic inflammation

is involved in the development of non-alcoholic steato-hepatitis (NASH). There is currently no effective treatment for the majority of patients with NASH. Since we have shown that group IVA phospholipase A2 (IVA-PLA2), a key enzyme contributing to the generation

of lipid inflammatory mediators, participates in the development of high-fat diet-induced liver fibrosis, we focus on IVA-PLA2 as a candidate for pharma-cotherapy of NASH. The aim of this study was to evaluate effects Nutlin3a of IVA-PLA2-deficiency on carbon tetrachloride (CCl4)-in-duced hepatic fibrosis. In addition, we also examined effects of IVA-PLA2-deficiency on the acute liver injury induced by CC^ and acetaminophen (APAP). Methods: Acute liver injury was induced in wild-type (WT) and IVA-PLA2-knockout (KO) mice by intraperitoneal administration of a single dose of CCl4 (1.5 μL/g body weight (BW)) or APAP (300 mg/kg BW). Hepatic fibrosis was induced in mice at 6 weeks of age by intraperi-toneal injection of CCl4 (0.31 μL/g BW, 2 times/week for 6 week). Results: In mouse model for acute liver injury, increased serum levels of AST and ALT in WT mice administrated with CCl4 or APAP were reduced by IVA-PLA2-deficiency. Histolog-ical analysis (HE staining) also showed that CCl4- Etomidate or APAP-in-duced hepatic damage was markedly reduced in KO mice compared with WT mice. An increase in TUNEL-positive cells induced by CCl4-administration in WT mice was reduced in the KO mice. These results suggest that the role of IVA-PLA2 in promoting the development of OS-induced liver injury. We also examined the effect of IVA-PLA2-deficiency

on the development of hepatic fibrosis induced by chronic liver injury in mice chronically administered with CCl4. Picrosirius red staining revealed that the accumulation of collagen was decreased in KO mice with CCl4-administration compared with WT mice. In addition, IVA-PLA2-deficiency decreased the expression of mRNA for fibrosis-promoting molecules, α-SMA and TGF-β1, in the CCl4-treated liver. Furthermore, the increased mRNA expression of CD11b, monocyte marker, and monocyte chemotactic protein-1 (MCP-1) by CCl4 was significantly suppressed in KO mice. Consequently, our findings suggest that IVA-PLA2-depen-dent expression of MCP-1 is involved, at least in part, in the development of hepatic fibrosis induced by chronic administration of CCl4.