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.

A novel large deletion and three polymorphisms in the FECH gene associated with erythropoietic protoporphyria / C. Li, E. Di Pierro, V. Brancaleoni, M.D. Cappellini, D.P. Steensma. - In: CLINICAL CHEMISTRY AND LABORATORY MEDICINE. - ISSN 1434-6621. - 47:1(2009 Jan), pp. 44-46.

A novel large deletion and three polymorphisms in the FECH gene associated with erythropoietic protoporphyria

M.D. Cappellini
Penultimo
;
2009

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.
Deletion; Erythropoietic protoporphyria; FECH gene; Polymorphisms
Settore MED/09 - Medicina Interna
gen-2009
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/53460
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