Abstract:
:Wegener's granulomatosis (WG) is a systemic disease with complex genetic background. It is characterized by necrotizing granulomatous inflammation of the upper and lower respiratory tract, glomerulonephritis, vasculitis and the presence of antineutrophil cytoplasmatic autoantibodies (C-ANCAs) in sera of patients. Here, we report on an extended association screen (EAS) with 202 microsatellite markers, representing apoptosis-related genes and further genes down-regulated in apoptotic neutrophils, using pooled DNA of 150 Northern German patients suffering from WG and 100 healthy Northern German controls. Six microsatellite allele patterns were found significantly associated with WG, three of which could be confirmed by individual genotyping. One marker remained significantly associated after multiple corrections. This marker representing the retinoid X receptor beta gene (RXRB, P=7.60x10(-6), distance to gene: approximately 5.3 kb) is localised in the major histocompatibility complex (MHC) region between the HLA-DPB1 and DAXX genes. HLA-DPB1 typing and fine mapping of the region with additional microsatellites and single-nucleotide polymorphisms (SNPs) revealed a strong association of WG with the significantly over-represented DPB1*0401 ( P=1.51x10(-10), OR=3.91) allele compared with the control cohort. In addition, an extended haplotype DPB1*0401/RXRB03 was identified showing an even stronger association with WG ( P=7.13x10(-17), OR=6.41). These results represent the strongest association of a genomic region with WG, suggesting a major genetic contribution in the aetiology of the disease. Thus, our data demonstrate that EAS may be a valuable alternative approach for determining genetic predisposition factors in multifactorial diseases.
journal_name
Hum Genetjournal_title
Human geneticsauthors
Jagiello P,Gencik M,Arning L,Wieczorek S,Kunstmann E,Csernok E,Gross WL,Epplen JTdoi
10.1007/s00439-004-1092-zkeywords:
subject
Has Abstractpub_date
2004-04-01 00:00:00pages
468-77issue
5eissn
0340-6717issn
1432-1203journal_volume
114pub_type
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