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Home / Equine Research Bank / Anim Genet / Identification of equine major histocompatibility complex ha...
Animal genetics2010; 41 Suppl 2(Suppl 2); 150-153; doi: 10.1111/j.1365-2052.2010.02125.x

Identification of equine major histocompatibility complex haplotypes using polymorphic microsatellites.

Abstract: A system for identifying equine major histocompatibility complex (MHC) haplotypes was developed based on five polymorphic microsatellites located within the MHC region on ECA 20. Molecular signatures for 50 microsatellite haplotypes were recognized from typing 353 horses. Of these, 23 microsatellite haplotypes were associated with 12 established equine leucocyte antigen (ELA) haplotypes in Thoroughbreds and Standardbreds. Five ELA serotypes were associated with multiple microsatellite subhaplotypes, expanding the estimates of diversity in the equine MHC. The strong correlations between serological and microsatellite typing demonstrated a linkage to known MHC class I protein polymorphisms and validated this assay as a useful supplement to ELA serotyping, and in some applications, a feasible alternative method for MHC genotyping in horse families and in population studies.
© 2010 The Authors, Journal compilation © 2010 Stichting International Foundation for Animal Genetics.
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Publication Date: 2010-11-26 PubMed ID: 21070289PubMed Central: PMC3289534DOI: 10.1111/j.1365-2052.2010.02125.xGoogle Scholar: Lookup
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Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research developed a system to identify horse major histocompatibility complex (MHC) haplotypes using polymorphic microsatellites. The study validated this assay as a supplementary or alternative method to traditional equine leucocyte antigen (ELA) serotyping, useful in horse population studies and families.

Introduction to Major Histocompatibility Complex (MHC)

  • The Major Histocompatibility Complex (MHC) is an essential part of the immune system of vertebrates, including horses. It plays a crucial role in immune response, distinguishing between self and non-self cells.
  • The MHC region on a chromosome contains various genes related to immune responses. Variations in these genes, termed haplotypes, can impact an organism’s susceptibility to diseases.

Haplotype Identification using Polymorphic Microsatellites

  • The study developed a method for identifying MHC haplotypes in horses using five polymorphic microsatellites located within the MHC region on ECA 20 (a chromosome in horses).
  • Polymorphic microsatellites are sequences of DNA with repeat units that vary in number among individuals, making them useful as genetic markers for various applications, including identifying haplotypes.

Molecular Signatures and ELA Haplotypes

  • A total of 50 different molecular signatures (microsatellite haplotypes) were identified from typing (analysing genetic material) 353 horses. These molecular signatures represent variants in the genetic information within the MHC region.
  • Of these 50 microsatellite haplotypes, 23 were associated with 12 established equine leucocyte antigen (ELA) haplotypes in two horse breeds, Thoroughbreds and Standardbreds. ELA haplotypes refer to variations in specific genes that control the immune response in horses.

Estimates of Diversity in the Equine MHC

  • The fact that five ELA serotypes (groups of microorganisms classified together based on their cell surface antigens) are associated with multiple microsatellite subhaplotypes shows more diversity in the equine MHC than previously known.
  • Greater diversity in the MHC could potentially lead to a more varied immune response, which might affect susceptibility to different diseases.

Correlation between Serological and Microsatellite Typing

  • The study found a strong correlation between the results of serological (based on the analysis of serum) and microsatellite typing methods.
  • This correlation indicates that the new method developed is linked to known MHC class I protein polymorphisms (variations in proteins involved in the immune response).
  • The results of this study validate the new method as a useful supplement to, or possible alternative for, ELA serotyping in certain applications, including genotyping MHC in horse families and population studies.

Cite This Article

APA
Tseng CT, Miller D, Cassano J, Bailey E, Antczak DF. (2010). Identification of equine major histocompatibility complex haplotypes using polymorphic microsatellites. Anim Genet, 41 Suppl 2(Suppl 2), 150-153. https://doi.org/10.1111/j.1365-2052.2010.02125.x

Publication

Animal genetics
ISSN: 1365-2052
NlmUniqueID: 8605704
Country: England
Language: English
Volume: 41 Suppl 2
Issue: Suppl 2
Pages: 150-153

Researcher Affiliations

Tseng, C T
  • Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
Miller, D
    Cassano, J
      Bailey, E
        Antczak, D F

          MeSH Terms

          • Animals
          • Haplotypes
          • Horses / genetics
          • Horses / immunology
          • Major Histocompatibility Complex
          • Microsatellite Repeats

          Grant Funding

          • R01 HD049545 / NICHD NIH HHS
          • R01 HD049545-05 / NICHD NIH HHS
          • HD-049545 / NICHD NIH HHS

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