title: Physiology and pathophysiology of iron in hemoglobin-associated diseases.
abstract: Iron overload and iron toxicity, whether because of increased absorption or iron loading from repeated transfusions, can be major causes of morbidity and mortality in a number of chronic anemias. Significant advances have been made in our understanding of iron homeostasis over the past decade. At the same time, advances in magnetic resonance imaging have allowed clinicians to monitor and quantify iron concentrations noninvasively in specific organs. Furthermore, effective iron chelators are now available, including preparations that can be taken orally. This has resulted in substantial improvement in mortality and morbidity for patients with severe chronic iron overload. This paper reviews the key points of iron homeostasis and attempts to place clinical observations in patients with transfusional iron overload in context with the current understanding of iron homeostasis in humans.
authors.affiliation: Children׳s Center for Cancer and Blood Diseases, Children׳s Hospital Los Angeles, University of Southern California Keck School of Medicine, Los Angeles, CA 90027, USA. Electronic address: tcoates@chla.usc.edu.
authors.forename: Thomas D
authors.initials: TD
authors.lastname: Coates
mesh_terms: D006453:Hemoglobinopathies / Q000188:drug therapy / Q000378:metabolism / Q000503:physiopathology*; D006454:Hemoglobins / Q000378:metabolism; D006706:Homeostasis / Q000502:physiology*; D006801:Humans; D007501:Iron / Q000378:metabolism*; D007502:Iron Chelating Agents / Q000627:therapeutic use; D019190:Iron Overload / Q000503:physiopathology
chemical_list: D006454:Hemoglobins; D007502:Iron Chelating Agents; D007501:Iron
keywords: Chelation; Hemochromatosis; Hemoglobinopathy; Iron overload; Iron toxicity; Magnetic resonance imaging; ROS; Sickle cell disease; Thalassemia; Transfusion
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