PMID- 15014431 OWN - NLM STAT- MEDLINE DCOM- 20041106 LR - 20111117 IS - 1466-4879 (Print) IS - 1466-4879 (Linking) VI - 5 IP - 3 DP - 2004 May TI - Defining the contribution of the HLA region to cis DQ2-positive coeliac disease patients. PG - 215-20 AB - The major genetic susceptibility to coeliac disease is contributed by the human leukocyte antigen (HLA) region. The primary association is with the HLA-DQ2 molecule, encoded by the DQA1*05 and DQB1*02 alleles, which is expressed by over 90% of patients. The aim of our study was to perform an extensive scan of the entire HLA region to determine whether there is evidence for the presence of additional HLA susceptibility genes for coeliac disease in the Dutch population, acting independently of DQ2. In all, 16 microsatellite markers and the DQA1 and DQB1 genes were genotyped in simplex cis DQ2-positive coeliac disease families and cis DQ2-positive control families. Allele frequencies of markers on phase-known DQ2-positive haplotypes transmitted to patients were compared to a combined group of DQ2-positive nontransmitted and control haplotypes, thereby controlling for the DQ2 contribution. No significant differences at any of the marker loci were detected, suggesting that DQ2 is the major HLA risk factor for coeliac disease. Individuals homozygous for DQ2 or heterozygous for DQA1*05-DQB1*02/DQA1*0201-DQB1*02 were found to be at five-fold increased risk for development of coeliac disease (P<10(-8)). This risk seems to be conferred by the presence of a second DQB1*02 allele next to one DQA1*05-DQB1*02 haplotype, independently of the second DQA1 allele. FAU - van Belzen, M J AU - van Belzen MJ AD - Complex Genetics Group, Department of Biomedical Genetics, University Medical Centre Utrecht, Utrecht, The Netherlands. FAU - Koeleman, B P C AU - Koeleman BP FAU - Crusius, J B A AU - Crusius JB FAU - Meijer, J W R AU - Meijer JW FAU - Bardoel, A F J AU - Bardoel AF FAU - Pearson, P L AU - Pearson PL FAU - Sandkuijl, L A AU - Sandkuijl LA FAU - Houwen, R H J AU - Houwen RH FAU - Wijmenga, C AU - Wijmenga C LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Genes Immun JT - Genes and immunity JID - 100953417 RN - 0 (HLA-DQ Antigens) RN - 0 (HLA-DQ alpha-Chains) RN - 0 (HLA-DQ beta-Chains) RN - 0 (HLA-DQA1 antigen) RN - 0 (HLA-DQB1 antigen) SB - IM MH - Adolescent MH - Case-Control Studies MH - Celiac Disease/*genetics MH - Family MH - Female MH - Gene Frequency MH - Genetic Predisposition to Disease/*genetics MH - HLA-DQ Antigens/*genetics MH - HLA-DQ alpha-Chains MH - HLA-DQ beta-Chains MH - Haplotypes/*genetics MH - Heterozygote MH - Homozygote MH - Humans MH - Male MH - Microsatellite Repeats/genetics MH - Middle Aged MH - Risk Factors EDAT- 2004/03/12 05:00 MHDA- 2004/11/09 09:00 CRDT- 2004/03/12 05:00 PHST- 2004/03/12 05:00 [pubmed] PHST- 2004/11/09 09:00 [medline] PHST- 2004/03/12 05:00 [entrez] AID - 6364061 [pii] AID - 10.1038/sj.gene.6364061 [doi] PST - ppublish SO - Genes Immun. 2004 May;5(3):215-20. doi: 10.1038/sj.gene.6364061.