Molecular, physiological and clinical aspects of the iron storage protein ferritin.
Oxidative stress is a major factor in inflammatory, malignant and metabolic diseases in domestic and farm animals. Oxidative stress-mediated damage depends on the level of cellular and total body iron status because an excess iron (Fe(2+)) pool produces the most harmful free radicals (hydroxyls) through the Fenton reaction. Ferritin is a ubiquitous and conserved iron storage protein that plays a central role in iron metabolism and has the dual function of storing iron in bioavailable and non-toxic forms. Intracellular ferritin synthesis is controlled at translational and transcriptional levels in both an iron-dependent and an iron-independent manner. Ferritin is also found in extracellular fluids such as serum, synovial fluids and milk. Although serum ferritin is a sensitive indicator of body iron stores, the extracellular ferritins are elevated in inflammatory or malignant disease. Circulating ferritin interacts with ferritin-binding protein to form a complex, which is rapidly cleared from the body. This review describes recent research of physiological and clinical significance of ferritin and its application to future veterinary medicine.
Orino
Koichi
K
Laboratory of Veterinary Biochemistry, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan. orino@vmas.kitasato-u.ac.jp
Watanabe
Kiyotaka
K
D000595:Amino Acid Sequence; D000818:Animals; D005293:Ferritins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D007501:Iron / Q000378:metabolism*; D008969:Molecular Sequence Data; D018384:Oxidative Stress / Q000502:physiology; D017382:Reactive Oxygen Species / Q000378:metabolism; D016415:Sequence Alignment
D017382:Reactive Oxygen Species; D005293:Ferritins; D007501:Iron