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First Spanish case of thalassemia major due to a compound heterozygosity for the IVS-II-848 (C --> A) and codon 39 (C --> T) mutations of the beta-globin gene



First Spanish case of thalassemia major due to a compound heterozygosity for the IVS-II-848 (C --> A) and codon 39 (C --> T) mutations of the beta-globin gene



Hemoglobin 30(1): 15-21



This report describes the first case in Spain of a severe form of beta-thalassemia (thal) due to a compound heterozygosity for the IVS-II-848 (C --> A) and the nonsense codon 39 (C --> T) mutations. Five members of a family from Cadiz (southern Spain) were studied. The proband was an 8-year-old girl diagnosed as anemic at the age of 13 months. Her father had the codon 39 (C --> T) mutation and her mother the C --> A change at nucleotide (nt) 848 of IVS-II. Haplotype analysis showed that the proband was a compound heterozygote for haplotypes I [+ --> + +] and VII [+ --> +]. This is the first description in Spain of the IVS-II-848 (C --> A) mutation. It appears, from restriction fragment length polymorphism (RFLP) analysis, that this mutation has a different origin in the various populations, where it was found. This observation shows that in this case the association of a beta(0)- and a beta(+)-thal mutation does not lead to a thalassemia intermedia but to a severe thalassemia with very low hemoglobin (Hb) levels. From a therapeutic point of view, early introduction of a transfusion regimen may improve the clinical picture of these children, allowing for better development and growth.

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Accession: 049085543

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PMID: 16540410

DOI: 10.1080/03630260500453875


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