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HLA‐A, B, Cw and DRB1, DRB3/4/5, DQB1, DPB1 Frequencies in German Immunoglobulin A‐Deficient Individuals
Author(s) -
Helmut K.G. Machulla,
Ulf Schönermarck,
Astrid Schaaf,
Lutz Müller,
Christopher C. Kloss,
Jana Krüger,
Gerhard Kunze,
G Schönermarck,
Jürgen Langner
Publication year - 2000
Publication title -
scandinavian journal of immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.934
H-Index - 88
eISSN - 1365-3083
pISSN - 0300-9475
DOI - 10.1046/j.1365-3083.2000.00765.x
Subject(s) - haplotype , human leukocyte antigen , allele , genetics , biology , typing , immunology , immunoglobulin a , serology , context (archaeology) , antibody , gene , immunoglobulin g , antigen , paleontology
HLA class I and II frequencies and haplotype frequencies were determined in 80 German immunoglobulin (Ig)A‐deficient individuals and 157 healthy controls with normal IgA levels using serological and DNA typing methods. For several alleles, significant associations were found, which could be explained mainly in the context of a positive association with three different extended haplotypes (HLA‐B*08:DRB1*0301: DQB1*0201, HLA‐B*14:DRB1*0102:DQB1*0501 and HLA‐B*44:DRB1*0701:DQB1*0202) and a negative association with a fourth haplotype (HLA‐B*07:DRB1*1501:DQB1*0602). Furthermore, for the first time this study reports a positive association of IgA deficiency with DPB1 alleles. Homozygosity rate for the gene loci DRB1 and DQB1 was increased in IgA deficiency. Further analysis suggested a different pattern of HLA associations depending on the degree of IgA deficiency and the gender of the IgA‐deficient individuals.