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  • Title: Interaction between deletion delta-thalassemia and beta zero-thalassemia (codon 39 nonsense mutation) in a Sardinian family.
    Author: Galanello R, Podda A, Melis MA, Monne M, Cao A.
    Journal: Prog Clin Biol Res; 1989; 316B():113-21. PubMed ID: 2482492.
    Abstract:
    This paper describes individuals of Sardinian descent with heterozygous normal-Hb A2 beta-thalassemia who have a chromosome with a 7.2 Kb deletion in the psi beta/delta globin intergenic region and a chromosome with the codon 39 nonsense mutation. The propositus has the typical thalassemia-like red cell indices with a relatively high Hb level (13.4 g/dl) for a beta-thalassemia carrier, indicating a normal function of the beta-globin gene in cis to the 7.2 Kb deletion. The deletion starts between the psi beta and delta genes and ends in the IVS-2 of the delta-gene. His breakpoints are identical to a previously described deletion detected in the homozygous state in a patient with thalassemia intermedia, homozygous for G-greater than A mutation at position 5 of IVS-1. Because the mutation herein described silences the delta-globin gene and leaves intact the function of the in cis beta-globin gene we propose the definition of deletion delta zero-thalassemia.
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