Abstract:
:Recently, we described a new genetic disorder (the "hereditary hyperferritinemia-cataract syndrome") clinically characterized by the combination of elevated serum ferritin and congenital bilateral nuclear cataract, both cotransmitted as an autosomal dominant trait. In affected subjects, hyperferritinemia (ranging from 950 to 2,259 micrograms/L) is typically not related to iron overload. Differently from subjects with hereditary hemochromatosis, they have normal to low levels of serum iron and percent of transferrin saturation and absence of iron overload in parenchymal organs. When unnecessary phlebotomies are performed, they rapidly develop iron-deficient anemia, with persistently elevated levels of serum ferritin. By RNA-single-strand conformation polymorphism screening of the L-subunit ferritin gene on chromosome 19, we were able to identify in affected subjects a mutation in the 5' untranslated region. This mutation involves the five nucleotides sequence [CAGUG] of the iron-responsive element (IRE), which is critical for the posttranscriptional regulation of ferritin synthesis by means of IRE-binding protein (IRE-BP). Thus, it is very likely to provide the molecular basis for the iron-insensitive upregulation of ferritin synthesis in affected subjects.
journal_name
Bloodjournal_title
Bloodauthors
Girelli D,Corrocher R,Bisceglia L,Olivieri O,De Franceschi L,Zelante L,Gasparini Psubject
Has Abstractpub_date
1995-12-01 00:00:00pages
4050-3issue
11eissn
0006-4971issn
1528-0020journal_volume
86pub_type
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