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DLA-DRB1 histocompatibility genotyping using RT-nested PCR and cycle sequencing.

G M Happ1, E Aquilla, M Martick

  • 1Institute of Arctic Biology, University of Alaska-Fairbanks, 99775, USA.

Veterinary Immunology and Immunopathology
|October 3, 1999
PubMed
Summary
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Researchers developed a novel reverse transcriptase and nested-PCR method for canine DLA-DRB1 genotyping. This technique efficiently amplifies expressed sequences from blood, aiding in autoimmune disease research.

Area of Science:

  • Immunogenetics
  • Molecular Biology
  • Veterinary Genetics

Background:

  • Class-II histocompatibility genes, like canine leukocyte antigen (DLA)-DRB1, are linked to autoimmune disease susceptibility in mammals.
  • Accurate genotyping of DLA-DRB1 is crucial for understanding disease predisposition in dogs.

Purpose of the Study:

  • To develop and validate a reverse transcriptase and nested-polymerase chain reaction (RT n-PCR) protocol for amplifying expressed canine DLA-DRB1 sequences.
  • To provide a reliable method for genotyping individual dogs at the DLA-DRB1 locus.

Main Methods:

  • Utilized reverse transcriptase and nested-PCR for amplification of expressed DLA-DRB1 sequences from canine blood samples.
  • Employed specific primer sets (DR-SP, DR-STOP, primer 57, primer 367) to generate a 334 bp amplified product.

Related Experiment Videos

  • Identified amplified sequences using cycle sequencing, overcoming limitations of restriction fragment length polymorphism (RFLP) due to high DLA-DRB1 allele diversity.

    • Main Results:

    • Successfully amplified expressed canine DLA-DRB1 sequences using the developed RT n-PCR protocol.
    • Demonstrated the efficiency of cycle sequencing for identifying amplified alleles, which is more suitable than RFLP for diverse DLA-DRB1 loci.
    • Established a reliable method for genotyping individual dogs at the DLA-DRB1 locus.

    Conclusions:

    • The developed RT n-PCR protocol is effective for genotyping canine DLA-DRB1.
    • This method facilitates research into the association between DLA-DRB1 and autoimmune diseases in dogs.
    • The protocol offers a practical approach for molecular diagnostics and genetic studies in canine populations.