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Related Experiment Videos

Major histocompatibility complex class II polymorphisms in humans and chimpanzees

R E Bontrop1, M Kenter, N Otting

  • 1Department of Chronic and Infectious Diseases, ITRI-TNO, Rijswijk, The Netherlands.

Journal of Medical Primatology
|January 1, 1993
PubMed
Summary
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Chimpanzee major histocompatibility complex (MHC) class II genes show fewer allelic lineages than humans. However, extensive polymorphism exists within these chimpanzee lineages, maintaining overall diversity.

Area of Science:

  • Immunogenetics
  • Comparative genomics

Background:

  • The Major Histocompatibility Complex (MHC) plays a crucial role in immune responses.
  • Understanding MHC variation in non-human primates like chimpanzees provides insights into immune system evolution.

Purpose of the Study:

  • To investigate allelic variation at the MhcPatr-DR and -DQ loci in chimpanzees.
  • To compare chimpanzee MHC class II gene polymorphism with human HLA data.

Main Methods:

  • Molecular biological techniques were employed to analyze allelic variation.
  • Data was compared against existing human Leukocyte Antigen (HLA) data.

Main Results:

  • Chimpanzees exhibit a condensed repertoire of MHC class II allelic lineages compared to humans.

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  • Despite fewer lineages, individual chimpanzee lineages display significant polymorphism.
  • This contrasts with humans, where some equivalent lineages are oligomorphic (have few alleles).

    • Conclusions:

    • Chimpanzee MHC class II gene organization differs from humans, showing lineage condensation.
    • Overall MHC class II polymorphism is maintained in chimpanzees through extensive variation within fewer lineages.
    • This suggests distinct evolutionary pressures shaping MHC diversity in primates.