Evidence for extensive DLA polymorphism in different dog populations
- 1 July 2002
- journal article
- research article
- Published by Wiley in Tissue Antigens
- Vol. 60 (1) , 43-52
- https://doi.org/10.1034/j.1399-0039.2002.600106.x
Abstract
Many of the genes within the Canine Major Histocompatibility Complex are highly polymorphic. Most of the alleles defined to date for DLA-DRB1, DQA1 and DQB1 come from the analysis of European or North American pure bred dogs. Little is known about DLA gene polymorphisms in other dog populations. We have studied Alaskan Husky dogs and Brazilian mongrel dogs and compared them with a panel of 568 European dogs and 40 Alaskan gray wolves. DNA sequence based typing was used to characterize a series of 12 Alaskan Huskies and 115 Brazilian mongrels for their DLA-DRB1, DQA1 and DQB1 alleles. Within these dogs, 22 previously undescribed DLA class II alleles were identified: 10 DRB1, 5 DQA1 and 7 DQB1 alleles. All these alleles were found in more than one animal, and, in some cases, as a homozygote. Several alleles initially observed in Alaskan gray wolves were found in these dogs. Each new allele was found in specific haplotypic combinations. Many new DLA class II haplotypes were identified. Several of the new alleles and haplotypes were also identified in the European dogs used for comparison. One new haplotype, containing a previously unknown DLA-DRB1 allele together with DQA1 and DQB1 alleles only seen before in gray wolves, was found in 20 Brazilian dogs, including three homozygous animals. It appears likely that the extent of polymorphism of the DLA genes will increase substantially as dogs from a wider geographic distribution are studied. This has major implications for the study of disease susceptibility and immune responsiveness in dogs.Keywords
This publication has 13 references indexed in Scilit:
- Extensive interbreed, but minimal intrabreed, variation of DLA class II alleles and haplotypes in dogsTissue Antigens, 2002
- Nomenclature for factors of the dog major histocompatibility system (DLA), 2000: Second report of the ISAG DLA Nomenclature CommitteeTissue Antigens, 2001
- Detection of Leishmania infantum by PCR, serology and cellular immune response in a cohort study of Brazilian dogsParasitology, 2001
- Identification of further DLA-DRB1 and DQA1 alleles in the dogEuropean Journal of Immunogenetics, 2000
- Nomenclature for factors of the dog major histocompatibility system (DLA), 1998. First report of the ISAG DLA Nomenclature CommitteeTissue Antigens, 1999
- Interbreed variation of DLA-DRB1, DQA1 alleles and haplotypes in the dogVeterinary Immunology and Immunopathology, 1999
- Nine new dog DLA-DRB1 alleles identified by sequence-based typingImmunogenetics, 1998
- Nomenclature for factors of the BoLA system, 1996: report of the ISAG BoLA Nomenclature CommitteeAnimal Genetics, 1997
- Molecular analysis of DLA‐DRBB1 polymorphismTissue Antigens, 1996
- Molecular analysis and polymorphism of the DLA‐DQA gene.Tissue Antigens, 1996