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EnglishTwo beta-thalassaemia patients, whose constitutive genotype was beta(39C)/beta(39C-->T), had the clinical phenotype beta-thalassaemia intermedia. Analysis of leucocyte DNA showed the presence of the mutated beta(39C-->T)-gene exclusively, while the normal beta(39C)-gene was also present in reticulocyte RNA. Deletional analysis of chromosome 11p15.5 on leucocyte DNA showed large deletions including the beta-globin gene. Two populations of erythroid progenitors, one heterozygous and the other hemizygous for the beta(39C-->T) mutation, were demonstrated in one case. This confirms that, in heterozygous individuals, beta-thalassaemia intermedia may be caused by inactivation of the beta-locus in trans as a result of chromosome 11p15.5 deletions in a subpopulation of haematopoietic cells
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| Titolo: | Somatic deletion of the normal beta-globin gene leading to thalassaemia intermedia in heterozygous beta-thalassaemic patients | |
| Autori: | ||
| Data di pubblicazione: | 2004 | |
| Rivista: | ||
| Abstract: | Two beta-thalassaemia patients, whose constitutive genotype was beta(39C)/beta(39C-->T), had the clinical phenotype beta-thalassaemia intermedia. Analysis of leucocyte DNA showed the presence of the mutated beta(39C-->T)-gene exclusively, while the normal beta(39C)-gene was also present in reticulocyte RNA. Deletional analysis of chromosome 11p15.5 on leucocyte DNA showed large deletions including the beta-globin gene. Two populations of erythroid progenitors, one heterozygous and the other hemizygous for the beta(39C-->T) mutation, were demonstrated in one case. This confirms that, in heterozygous individuals, beta-thalassaemia intermedia may be caused by inactivation of the beta-locus in trans as a result of chromosome 11p15.5 deletions in a subpopulation of haematopoietic cells | |
| Handle: | http://hdl.handle.net/11571/150623 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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