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A novel large deletion and three polymorphisms in the FECH gene associated with erythropoietic protoporphyria
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Chumei Li
Veröffentlicht/Copyright:
5. Dezember 2008
Abstract
Background: Erythropoietic protoporphyria (EPP) is known to be inherited in both autosomal dominant and recessive manners. A deleterious mutation in conjunction with a polymorphic wild type allele underlies the molecular basis of the dominant type.
Methods: We report a patient with EPP who was found to have a novel large deletion [c.1-9628_67+2871del12566 bp] and three polymorphisms [c.1–251A>G, c.68-23C>T and c.315-48T>C] in trans to the deletion in his ferrochelatase (FECH) gene.
Results: The combination of the deletion and the polymorphisms reduced his FECH activity level to 20% of control.
Conclusions: It is conceivable that a homozygous state for this polymorphic haplotype might be sufficient to produce clinical phenotype of EPP. The boundary between autosomal dominant and autosomal recessive inheritance may not always be distinct.
Clin Chem Lab Med 2009;47:44–6.
Received: 2008-6-19
Accepted: 2008-10-7
Published Online: 2008-12-05
Published Online: 2008-12-5
Published in Print: 2009-01-01
©2009 by Walter de Gruyter Berlin New York
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