New insight into iron homeostasis through the study of non-HFE hereditary haemochromatosis

Antonella Roetto, Clara Camaschella

Research output: Contribution to journalArticlepeer-review

Abstract

Non-HFE haemochromatosis is a negative definition applied to all those haemochromatosis disorders that are unrelated to HFE mutations. Four genes are responsible for the distinct types of non-HFE haemochromatosis: hepcidin and hemojuvelin are the genes involved in type 2 or juvenile haemochromatosis, transferrin receptor 2 is involved in type 3 haemochromatosis, and ferroportin 1 is mutated in type 4, the atypical dominant form of primary iron overload. Molecular genetic studies of these conditions have greatly contributed to our understanding of the regulation of iron absorption. A milestone was the discovery that hepcidin, the key iron regulator in mice, is the gene mutated in the most severe, juvenile form of haemochromatosis. This finding indicates a fundamental role of hepcidin in inhibiting both iron absorption from duodenal cells and iron release from macrophages, and has opened up a new view of haemochromatosis as a disorder of hepcidin.

Original languageEnglish
Pages (from-to)235-250
Number of pages16
JournalBest Practice and Research: Clinical Haematology
Volume18
Issue number2 SPEC. ISS.
DOIs
Publication statusPublished - Jun 2005

Keywords

  • Ferroportin
  • Haemochromatosis
  • Hemojuvelin
  • Hepcidin
  • HFE
  • Iron
  • Transferrin receptor 2

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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