Abstract:
:The highly conserved 350-bp major regulatory element HS-40 (or alphaMRE) upstream of the human alpha-globin gene cluster is involved in the regulation of alpha-globin gene expression. The study of alphaMRE differences between human populations and the evolution of alphaMRE sequences in mammals may lead to a better understanding of the function and importance of this element in the regulation of expression of the downstream alpha-cluster. Denaturing gradient gel electrophoresis was used to determine the sequence heterogeneity of the alphaMRE region in 276 unrelated individuals, representing seven different populations. Furthermore, we analysed the alpha major regulatory elements of chimpanzee, orang-utan and rhesus monkeys and compared them with the equivalent human and murine sequences. Six different alphaMRE haplotypes (labelled A to F) were found in humans. Haplotype frequencies between the seven populations showed a gradual shift to a higher haplotype A distribution from west to east, being the highest in Indonesians. The African sample shows the largest divergence in haplotypes. Five out of six different haplotypes were present, three of which were exclusively found in Africans. The high prevalence of the haplotype A in humans, together with the conservation of this haplotype in apes, suggests that it is the ancestral one. The alphaMRE fragment appears to be a highly polymorphic marker, which could be used in combination with the regular markers in the alpha-cluster to extend the haplotype and to follow segregation of alpha-thalassaemia genes in population studies more accurately.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Harteveld CL,Muglia M,Passarino G,Kielman MF,Bernini LFdoi
10.1046/j.1365-2141.2002.03917.xsubject
Has Abstractpub_date
2002-12-01 00:00:00pages
848-54issue
3eissn
0007-1048issn
1365-2141pii
3917journal_volume
119pub_type
杂志文章abstract::Haematopoietic cell transplantation (HCT) survivors are at increased risk for developing congestive heart failure (CHF), primarily due to pre-HCT exposure to anthracyclines. We examined the association between the development of CHF after HCT and polymorphisms in 16 candidate genes involved in anthracycline metabolism...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/bjh.12516
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abstract::Although the beta thalassaemia trait affects millions of people worldwide, there have been no controlled studies to determine whether it is associated with any clinical disability or abnormal physical signs. To address this question, 402 individuals were studied: 217 with beta thalassaemia trait, of whom 154 were awar...
journal_title:British journal of haematology
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journal_title:British journal of haematology
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abstract::A proportion of patients receiving allogeneic bone marrow transplants (BMT) for chronic myeloid leukaemia (CML) in first chronic phase relapse; most of these relapses show features of chronic phase disease. We report here a series of five patients seen at a single institution over a 10 year period who developed blast ...
journal_title:British journal of haematology
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journal_title:British journal of haematology
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journal_title:British journal of haematology
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