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Coeliac disease is strongly associated with HLA-DQ2, but it is possible that additional major histocompatibility complex genes also confer disease susceptibility. Encoded close to HLA-DQ are two genes, TAP1 and TAP2, whose products are believed to transport antigenic peptides from the cytoplasm into the endoplasmic reticulum. Comparison of 81 coeliac disease patients with caucasoid controls revealed an increased frequency of the alleles TAP1A and TAP2A in the patient population. However, no significant difference was found when patients were compared with HLA-DR and -DQ matched controls, indicating linkage disequilibrium between TAP1A, TAP2A, and HLA-DQ2. The TAP gene products do not have a major influence on susceptibility or resistance to coeliac disease in a Northern European Caucasoid population.

Type

Journal article

Journal

Immunogenetics

Publication Date

1993

Volume

38

Pages

345 - 350

Keywords

ATP-Binding Cassette Sub-Family B Member 2, ATP-Binding Cassette Transporters, ATP-Binding Cassette, Sub-Family B, Member 3, Alleles, Carrier Proteins, Celiac Disease, Histocompatibility Antigens Class II, Humans, Linkage Disequilibrium, Polymorphism, Genetic