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SLA-DRB1 and -DQB1 genotyping by the PCR-SSOP-Luminex method.

A Ando¹, A Shigenari, M Ota

¹Department of Molecular Life Science, Division of Basic Medical Science and Molecular Medicine, Tokai University School of Medicine, Isehara, Kanagawa, Japan.

Tissue Antigens

|April 22, 2011

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A new method using PCR-SSOP-Luminex accurately genotypes swine leukocyte antigen (SLA)-DRB1 and -DQB1 loci. This rapid technique identifies alleles and haplotypes in pigs, aiding genetic research.

Area of Science:

Veterinary Immunology
Molecular Genetics

Background:

The swine leukocyte antigen (SLA) complex plays a crucial role in the porcine immune system.
Accurate genotyping of SLA class II loci (SLA-DRB1 and -DQB1) is essential for understanding disease resistance and for breeding programs.

Purpose of the Study:

To develop and validate a novel, rapid, and accurate genotyping method for SLA-DRB1 and -DQB1 loci.
To identify SLA class II alleles and haplotypes in a Landrace pig population.

Main Methods:

Development of a genotyping assay utilizing polymerase chain reaction (PCR) with fluorescently labeled sequence-specific oligonucleotide probes (SSOPs).
Detection of amplified products using Luminex 100 xMAP technology for high-throughput analysis.
Validation of the method by sequencing PCR products from homozygous and heterozygous samples.

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Main Results:

The PCR-SSOP-Luminex method achieved 95% accuracy for both SLA-DRB1 and -DQB1 genotyping.
Sequencing confirmed the high accuracy of the developed method in 22 pig samples.
Identification of 12 low-resolution SLA class II haplotypes, including 7 DRB1 and 9 DQB1 alleles, in 283 Landrace pigs.

Conclusions:

The developed PCR-SSOP-Luminex method provides a simple, rapid, and accurate approach for SLA-DRB1 and -DQB1 genotyping.
This method facilitates the efficient identification of two- or four-digit alleles and haplotypes.
The findings contribute to a better understanding of SLA class II diversity in pigs.