Delta beta-thalassaemia in southern Italy: evidence for a single mutational event. 1984

A Carè, and N M Sposi, and A Giampaolo, and T Improta, and M Calandrini, and M Petrini, and M Marinucci, and A Tagarelli, and C Brancati

Haematological and molecular studies on 32 heterozygotes for G gamma A gamma delta beta(0)-thalassaemia from 15 unrelated families from southern Italy are reported. The haematological features of G gamma A gamma delta beta(0)-thalassaemia carriers are compared with those of beta-thalassaemia and Hb Lepore heterozygotes. Striking similarity exists between the phenotypic expression of beta-thalassaemia and Lepore mutations. Globin gene mapping studies indicated that the molecular lesion underlying delta beta-thalassaemia is a large deletion starting from the large intervening sequence of the delta gene and extending downstream from the beta gene. The possibility that delta beta-thalassaemia haplotypes in southern Italy originated from a single mutational event is discussed.

UI MeSH Term Description Entries
D007558 Italy A country in southern Europe, a peninsula extending into the central Mediterranean Sea, northeast of Tunisia. The capital is Rome. Sardinia
D002872 Chromosome Deletion Actual loss of portion of a chromosome. Monosomy, Partial,Partial Monosomy,Deletion, Chromosome,Deletions, Chromosome,Monosomies, Partial,Partial Monosomies
D004262 DNA Restriction Enzymes Enzymes that are part of the restriction-modification systems. They catalyze the endonucleolytic cleavage of DNA sequences which lack the species-specific methylation pattern in the host cell's DNA. Cleavage yields random or specific double-stranded fragments with terminal 5'-phosphates. The function of restriction enzymes is to destroy any foreign DNA that invades the host cell. Most have been studied in bacterial systems, but a few have been found in eukaryotic organisms. They are also used as tools for the systematic dissection and mapping of chromosomes, in the determination of base sequences of DNAs, and have made it possible to splice and recombine genes from one organism into the genome of another. EC 3.21.1. Restriction Endonucleases,DNA Restriction Enzyme,Restriction Endonuclease,Endonuclease, Restriction,Endonucleases, Restriction,Enzymes, DNA Restriction,Restriction Enzyme, DNA,Restriction Enzymes, DNA
D005914 Globins A superfamily of proteins containing the globin fold which is composed of 6-8 alpha helices arranged in a characterstic HEME enclosing structure. Globin
D006579 Heterozygote An individual having different alleles at one or more loci regarding a specific character. Carriers, Genetic,Genetic Carriers,Carrier, Genetic,Genetic Carrier,Heterozygotes
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013789 Thalassemia A group of hereditary hemolytic anemias in which there is decreased synthesis of one or more hemoglobin polypeptide chains. There are several genetic types with clinical pictures ranging from barely detectable hematologic abnormality to severe and fatal anemia. Thalassemias

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