Effect of dietary α‐linolenate/linoleate balance on endotoxin‐induced hepatitis in mice
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Abstract
Mice were fed diets with three different ratios of alpha-linolenate (18:3n-3) to linoleate (18:2n-6), and the severity of hepatitis during endotoxic shock was compared. Dietary enrichment with alpha-linolenate increased the severity of hepatitis and the mortality induced by lipopolysaccharide (LPS) in combination with D-galactosamine (GalN). Differences in the dietary alpha-linolenate/linoleate balance were mainly reflected in the levels of arachidonate and eicosapenatenoate in liver phospholipids. Pretreatment of mice with indomethacin was found to also enhance the severity of GalN/LPS-hepatitis. This indicated that cyclooxygenase products of arachidonate may suppress the development of GalN/LPS-hepatitis. The enhancement by high alpha-linolenate diets was not observed when a lethal dose of LPS in the absence of GalN was given. Our results indicate that there are pathophysiological conditions of endotoxin-induced hepatitis under which cyclooxygenase products of arachidonate play protective roles.
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