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Allelic diversity within the high frequency Mamu-A2*05/Mane-A2*05 (Mane-A*06)/Mafa-A2*05 family of macaque MHC-A loci

J Wu1, S Bassinger, G D Montoya

  • 1Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA.

Tissue Antigens
|May 24, 2008
PubMed

Insights

Macaque major histocompatibility complex (MHC) class I loci are crucial for understanding human disease and developing vaccines. This study characterized MHC-A alleles in Chinese rhesus, pig-tailed, and cynomolgus macaques, revealing significant diversity and novel alleles.

Area of Science:

  • Immunogenetics
  • Primate genomics
  • Comparative immunology

Background:

  • Macaque species are vital animal models for human infection and immunity research.
  • Genomic characterization of major histocompatibility complex (MHC) class I loci in macaques is essential for disease pathogenesis and vaccine development.
  • The Mamu-A2*05/Mane-A2*05 (Mane-A*06) MHC-A allele family is prevalent in Indian rhesus and pig-tailed macaques.

Purpose of the Study:

  • To characterize the genomic-level major histocompatibility complex (MHC) class I loci in Macaca mulatta (Mamu), Macaca nemestrina (Mane), and Macaca fascicularis (Mafa).
  • To investigate the prevalence and diversity of the Mamu-A2*05/Mane-A2*05/Mafa-A2*05 allele family across different macaque populations.

Main Methods:

  • Locus-specific amplification and direct DNA typing methodology were employed.
  • Analysis included Chinese rhesus macaques (n=182), pig-tailed macaques (n=309), and cynomolgus macaques (n=30).
  • Allele identification and characterization were performed for the MHC-A locus.

Main Results:

  • The Mamu-A2*05/Mane-A2*05/Mafa-A2*05 family locus was highly prevalent (75% in Chinese rhesus, 80% in pig-tailed, 87% in cynomolgus macaques).
  • Significant novel allele discovery occurred: 25 new alleles in Chinese rhesus, 19 in pig-tailed, and 15 in cynomolgus macaques.
  • Despite high conservation across species, the MHC-A locus demonstrated ongoing evolutionary dynamism with substantial genetic diversity.

Conclusions:

  • The Mamu-A2*05/Mane-A2*05/Mafa-A2*05 MHC-A locus is a conserved yet dynamic entity across macaque species.
  • The high prevalence and extensive novel allele discovery underscore the importance of this locus for macaque immunogenetics.
  • Further characterization of macaque MHC diversity is critical for their utility as models in infectious disease and immunology studies.

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