HLA DQA1-DQB1 genotypes in Bedouin families with celiac disease

Hum Immunol. 2002 Jun;63(6):502-7. doi: 10.1016/s0198-8859(02)00395-6.

Abstract

Celiac disease (CD) has a strong genetic association with human leukocyte antigens (HLA). The primary susceptibility for CD is HLA-DQA1*05 DQB1*02 (also known as DQ2), with the remainder of cases primarily HLA-DQA1*03 DQB1*03 (also known as DQ8). In a set of nine Bedouin multiplex celiac disease families and one simplex, we genotyped DNA samples at HLA DQA1 and DQB1. Nineteen celiac disease patients had at least one DQA1*05 DQB1*02 genotype (= DQ2), 4 affecteds had the second most common genotype of DQA1*03 DQB1*0302 (= DQ8), 9 were DQ2 and DQ8, and 4 had at least one copy of DQB1*02 without the DQA1*05 genotype. Using transmission disequilibrium testing, we observed a significant over-representation in affecteds of the DQA1*05 DQB1*02 genotype (p = 0.0089), as well as over-representation of the DQA1*03 DQB1*0302 genotype (p = 0.078). The HLA DQA1 DQB1 high-risk genotypes associated with celiac disease are similar in these Bedouin families with CD to what is observed in Northern and Southern Europeans.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Alleles
  • Arabs / genetics*
  • Celiac Disease / ethnology*
  • Celiac Disease / genetics*
  • Gene Frequency
  • Genetic Predisposition to Disease
  • Genotype
  • HLA-DQ Antigens / analysis
  • HLA-DQ Antigens / genetics*
  • HLA-DQ alpha-Chains
  • HLA-DQ beta-Chains
  • Haplotypes
  • Humans

Substances

  • HLA-DQ Antigens
  • HLA-DQ alpha-Chains
  • HLA-DQ beta-Chains
  • HLA-DQ2 antigen
  • HLA-DQ8 antigen
  • HLA-DQA1 antigen
  • HLA-DQB1 antigen