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DNA TYPING OF DQ AND DR ALLELES IN IgA‐DEFICIENT SUBJECTS
Author(s) -
Fiore M.,
Pera C.,
Delfino L.,
Scotese I.,
Ferrara G. B.,
Pignata C.
Publication year - 1995
Publication title -
international journal of immunogenetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.41
H-Index - 47
eISSN - 1744-313X
pISSN - 1744-3121
DOI - 10.1111/j.1744-313x.1995.tb00255.x
Subject(s) - autoantibody , immunology , allele , subclass , haplotype , typing , biology , human leukocyte antigen , selective iga deficiency , population , genetics , gene , antibody , antigen , medicine , environmental health
SUMMARY IgA deficiency (IgA‐D) represents the most common immunodeficiency syndrome of infancy. In most cases IgA‐D represents an isolated immunological disorder, while sometimes it is associated with IgG subclass deficiency or with the presence of autoantibodies. We investigated the pattern of association of IgA‐D with DRB1 and DQB1 loci of the HLA region by DNA molecular typing, which allows the identification of previously serologically undefined specificities. We also compared the gene frequency of DRB1 and DQB1 allelic variants between IgA‐D subjects with or without serum autoantibodies. Our results indicate that the gene frequency of the DRB1*0102 subtype and of the DRBP0102, DQB1*0501 haplotype is significantly higher in IgA‐D than in the general population. Furthermore, the IgA‐D subjects with autoantibodies showed a positive association with DR4 and DR13 subtypes, thus supporting the hypothesis that genetic factors are also involved in the association between IgA‐D and autoantibodies.