Abstract
We present a simple assay to determine the swine leukocyte antigen (SLA) haplotypes of animals within two experimental populations of MHC defined miniature pigs. The Yucatan miniature pigs have four founder haplotypes (w, x, y, z) and one recombinant haplotype (q). The NIH miniature pigs have three founder haplotypes (a, c, d) and two recombinant haplotypes (f, g). Because most crossovers occur between the class I and class II regions, haplotypes can be assigned by typing one class I locus and one class II locus for practical purposes. We have previously characterized these seven founder haplotypes by sequencing the cDNA of three SLA class I loci, designated as SLA-1, SLA-3 and SLA-2 and four SLA class II loci, SLA-DQA1, SLA-DQB1, SLA-DRA1 and SLA-DRB1. These sequences were used to design allele-specific primers to amplify one MHC class I and one MHC class II gene for each haplotype. Primers were tested for specificity in homozygous and heterozygous animals. Positive control primers were also designed to amplify a portion of the E-selectin or α-actin gene and multiplexed with the allele-specific primers to check for false negatives. This combination of allele-specific and positive control primers produced specific and robust PCR-site-specific primer assays for assigning SLA haplotypes in the two populations.
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Acknowledgements
The authors wish to thank Dr. Guy Bouchard of the Sinclair Research Center, Columbia, Mo. for providing samples for the Yucatan Miniature pigs and Dr. Lyn Colenda of the NIH Animal Center, Beltsville, Md. for providing some of the samples for the NIH Miniature pigs.
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Martens, G.W., Lunney, J.K., Baker, J.E. et al. Rapid assignment of swine leukocyte antigen haplotypes in pedigreed herds using a polymerase chain reaction-based assay. Immunogenetics 55, 395–401 (2003). https://doi.org/10.1007/s00251-003-0596-3
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DOI: https://doi.org/10.1007/s00251-003-0596-3