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    Genetic susceptibility to childhood common acute lymphoblastic leukaemia is associated with polymorphic peptide-binding pocket profiles in HLA-DPB1*0201.

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    Authors
    Taylor, G Malcolm
    Dearden, Simon
    Ravetto, Paul F
    Ayres, Michelle
    Watson, Pamela
    Hussain, Adiba
    Greaves, Mel F
    Alexander, F E
    Eden, Tim O B
    Affiliation
    Immunogenetics Laboratory, St Mary's Hospital, Manchester M13 0JH, UK. gmtaylor@man.ac.uk
    Issue Date
    2002-07-01
    
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    Abstract
    In a previous study, we obtained preliminary evidence in a small series of patients (n = 63) suggesting that susceptibility to childhood common acute lymphoblastic leukaemia (c-ALL) was associated with an allele at the HLA-DPB1 locus, DPB1*0201. We have now tested this hypothesis by comparing the frequency of children with leukaemia (n = 982) who typed for specific DPB1 alleles and two groups of non-leukaemic children, one consisting of children with solid tumours, excluding lymphomas (n = 409), the other consisting of normal infants (n = 864). We found that significantly more children with c-ALL and T-ALL, but not pro-B ALL or acute non-ALL typed for DPB1*0201 as compared with children with solid tumours [odds ratio (OR), 95% confidence interval (CI) for c-ALL: 1.76, 1.20-2.56; T-ALL: 1.93, 1.01-3.80] and normal infants (OR, 95% CI for c-ALL: 1.83, 1.34-2.48; T-ALL: 2.00, 1.10-3.82). In childhood c-ALL, significantly more children than those with solid tumours or normal infants typed for DPB1 alleles coding specific polymorphic amino acids lining the antigen-binding site of the DPbeta1*0201 allotypic protein, suggesting that susceptibility to childhood c-ALL may be influenced by DPbeta ABS amino acid polymorphisms shared by DPbeta1*0201 and other DPbeta1 allotypes. These results point to a mechanism of c-ALL susceptibility that involves the presentation of specific antigenic peptides, possibly derived from infectious agents, by DPbeta1*0201-related allotypic proteins, leading to the activation of helper T cells mediating proliferative stress on preleukaemic cells.
    Citation
    Genetic susceptibility to childhood common acute lymphoblastic leukaemia is associated with polymorphic peptide-binding pocket profiles in HLA-DPB1*0201. 2002, 11 (14):1585-97 Hum. Mol. Genet.
    Journal
    Human Molecular Genetics
    URI
    http://hdl.handle.net/10541/80232
    PubMed ID
    12075003
    Type
    Article
    Language
    en
    ISSN
    0964-6906
    Collections
    All Christie Publications

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