Abstract
For unknown reasons, serum ferritin levels increase in patients at risk for and with acute lung injury (ALI). To improve understanding of the relationship between serum ferritin alterations and the development of ALI, we investigated the effect of iron deficiency on the serum ferritin response of rats subjected to hemorrhage. We found that rats fed an iron-deficient diet for 6 weeks had decreased hemoglobin, hematocrit, liver total iron, liver total iron-binding capacity, and liver ferritin concentrations but the same serum ferritin concentrations as rats fed a control diet. Following hemorrhage, serum ferritin concentrations increased rapidly and progressively in rats fed a control diet. Along with increases in serum ferritin concentrations, control diet rats subjected to hemorrhage also had increased lung lavage leukocyte numbers, lung myeloperoxidase activities (lung inflammation), and lung lavage protein concentrations (lung leak) compared to control diet fed rats subjected to sham treatment. By comparison, the serum ferritin concentrations, lung inflammation, and lung leak of hemorrhaged rats fed an iron-deficient diet were decreased compared to hemorrhaged rats fed a control diet. These findings indicate that serum ferritin concentrations increase and acute lung injury develops following hemorrhage in rats fed a control, but not an iron-deficient, diet. A relatively brief exposure to an iron-deficient diet reduces hemorrhage-induced ALI.
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Park, Yy., Hybertson, B.M., Wright, R.M. et al. Serum Ferritin Increases in Hemorrhaged Rats That Develop Acute Lung Injury: Effect of an Iron-Deficient Diet. Inflammation 27, 257–263 (2003). https://doi.org/10.1023/A:1025044732423
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DOI: https://doi.org/10.1023/A:1025044732423