Abstract
We investigated whether marginal iron-deficiency (MID) without anemia influences liver lipid accumulation in rats. Ingestion of a MID diet in which the iron concentration was half of AIN-93 formulation (iron-adequate, IA) for 3weeks decreased liver iron concentration without anemia. We then evaluated the influence of the MID diet on liver lipid accumulation in combination with a high-sucrose (HS) diet and confirmed that the HS-MID diet successfully decreased liver iron concentration without anemia. Additionally, a significant increase in liver triglyceride concentration was found, accompanied by upregulation of hepatic fatty acid synthase expression in the rats fed the HS-MID diet compared to those in the rats fed an HS-IA diet, although no difference was observed in plasma transaminase activity and hepatic interleukin-1β expression. These results suggest that MID enhances de novo lipid synthesis via upregulation of lipogenic gene expression in combination with sucrose in the diet. Abbreviations: ALT, alanine aminotransferase; AST, aspartate aminotransferase; HS, high sucrose; IA, iron adequate; ID, iron deficiency; MID, marginal irondeficiency; NAFLD, non-alcoholic fatty liver disease.
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