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Related Experiment Videos

Evidence for an additional cattle DQB locus.

A Gelhaus1, B Förster, R D Horstmann

  • 1Department of Molecular Medicine, Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Str. 74, 20359 Hamburg, Germany. gelhaus@bni.uni-hamburg.de

Immunogenetics
|August 7, 1999
PubMed
Summary
This summary is machine-generated.

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THE SPECIFICITY OF ANTI-HLA CLASS II MONOCLONAL ANTIBODIES IN CATTLE.

European journal of immunogenetics : official journal of the British Society for Histocompatibility and Immunogenetics·2017

Researchers discovered a novel cattle gene, BoLADQB5, within the major histocompatibility complex. This ancient DQB locus, transcribed in leukocytes, is linked to specific bovine leukocyte antigen haplotypes.

Area of Science:

  • Immunogenetics
  • Comparative genomics
  • Bovine leukocyte antigen (BoLA) system

Background:

  • The major histocompatibility complex (MHC) class II genes in cattle exhibit significant genetic polymorphism.
  • Understanding this polymorphism is crucial for cattle breeding, disease resistance, and immune response studies.
  • Previous studies have identified various BoLA-DQB loci, but the full extent of the DQB gene family remains incompletely characterized.

Purpose of the Study:

  • To identify and characterize novel genetic sequences within the cattle MHC class II DQB region.
  • To determine the evolutionary origin and phylogenetic relationship of the identified sequence.
  • To investigate the transcriptional activity and allelic associations of the novel DQB locus.

Main Methods:

Related Experiment Videos

  • Sequence analysis of cattle genomic DNA to identify novel sequences.
  • Northern blot hybridization to confirm gene transcription in peripheral blood leukocytes.
  • Southern blot analysis and phylogenetic reconstruction to ascertain evolutionary relationships and locus designation.

    • Main Results:

    • Identification of a novel cattle sequence, designated KUH1, resembling MHC class II beta chain genes.
    • Confirmation of KUH1 transcription in peripheral blood leukocytes.
    • Phylogenetic and comparative analyses revealed KUH1 as a distinct DQB locus, proposed as BoLA-DQB5, an ancient locus predating DQB1/DQB2 duplication and associated with specific haplotypes including DQA5 and a duplicated DQ region.

    Conclusions:

    • BoLA-DQB5 represents a previously unrecognized, ancient DQB locus in the cattle MHC.
    • The discovery of BoLA-DQB5 expands our understanding of the complexity and evolutionary history of the bovine MHC class II region.
    • Further research into BoLA-DQB5 function and association with immune traits is warranted.