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Hereditary iron overload: update on pathophysiology, diagnosis, and treatment Franchini MAm J Hematol 2006[Mar]; 81 (3): 202-9Hereditary hemochromatosis, a very common genetic defect in the Caucasian population, is characterized by progressive tissue iron overload which leads to irreversible organ damage if it is not treated timely. The elucidation of the molecular pathways of iron transport through cells and its control has led to the understanding of various genetic iron-loading conditions. Four types of inherited iron overload have been recognized: type 1, the most common form with an autosomal recessive inheritance, is associated with mutations in the HFE gene on chromosome 6; type 2 (juvenile hemochromatosis) is an autosomal recessive disorder with causative mutations identified in the HJV gene (subtype A) on chromosome 1 and the HAMP gene (subtype B) on chromosome 19; type 3 has also an autosomal recessive inheritance with mutations in the TfR2 gene on chromosome 3; type 4 is an autosomal dominant condition with heterozygous mutations in the ferroportin 1 gene on chromosome 2. In this review, the genetics, pathophysiology, diagnosis, clinical features, and management of these different types of hereditary hemochromatosis are briefly discussed.|Antimicrobial Cationic Peptides/genetics/metabolism[MESH]|Cation Transport Proteins/genetics/metabolism[MESH]|Chromosomes, Human/genetics/metabolism[MESH]|Ferroportin[MESH]|Genes, Dominant/genetics[MESH]|Genes, Recessive/genetics[MESH]|Hemochromatosis Protein[MESH]|Hemochromatosis/classification/*diagnosis/genetics/*metabolism/*therapy[MESH]|Hepcidins[MESH]|Heterozygote[MESH]|Histocompatibility Antigens Class I/genetics/metabolism[MESH]|Humans[MESH]|Iron/metabolism[MESH]|Membrane Proteins/genetics/metabolism[MESH]|Receptors, Transferrin/genetics/metabolism[MESH] |
