TFR2-related hereditary hemochromatosis as a frequent cause of primary iron overload in patients from Central-Southern Italy

Francesca Clementina Radio, Silvia Majore, Francesco Binni, Michele Valiante, Bianca Maria Ricerca, Carmelilia De Bernardo, Aldo Morrone, Paola Grammatico

Research output: Contribution to journalArticle

Abstract

Objective: Hereditary hemochromatosis (HH) is a common Mendelian disorder of iron metabolism. Eighty percent of northern Europeans descendant HH patients carry the same mutation (p.C282Y) in the HFE gene. Simultaneously, due to a founder effect, its frequency varies considerably between different populations. In Central-Southern Italy the prevalence of p.C282Y mutation is low and in several patients the disease has different causes. Four additional rarer forms have been described. Type 3 HH has been reported in about 50 families and no more than 30 TFR2 pathogenic mutations have been globally identified. The aim of this study is to assess the TFR2 role in non- HFE HH pathogenesis. Study design and setting: TFR2 sequence analysis was performed on 45 Italian patients without HFE mutations. Results: This study revealed TFR2 biallelic pathogenic mutations in 7/45 (15.6%) individuals. Moreover monoallelic TFR2 deleterious defects (18%) or polymorphisms with unclear meaning (36%) were identified. Besides, we recognized 10 novel variants and 9 described changes. Conclusion: We believe this to be the largest series of type 3 HH patients described so far. Present findings support the hypothesis of a main role of the TFR2 gene in HH pathogenesis in those regions, such as Central-Southern Italy, where the p.C282Y frequency is low.

Original languageEnglish
Pages (from-to)83-87
Number of pages5
JournalBlood Cells, Molecules, and Diseases
Volume52
Issue number2-3
DOIs
Publication statusPublished - Feb 2014

Keywords

  • Hereditary hemochromatosis
  • Iron overload
  • Mediterranean area
  • Non-HFE hereditary hemochromatosis
  • Novel mutations
  • TFR2

ASJC Scopus subject areas

  • Molecular Biology
  • Molecular Medicine
  • Hematology
  • Cell Biology

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