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Related Experiment Videos

Serologically detectable polymorphism of the HLA-DC alpha-subunit.

R Tosi, N Tanigaki, R Sorrentino

    Journal of Immunology (Baltimore, Md. : 1950)
    |January 1, 1984
    PubMed
    Summary

    Two alloantisera, 8W1062 and 8W614, identified a novel specificity, DC alpha 3, on the alpha-subunit of DC molecules. This finding demonstrates the HLA linkage of the locus controlling the DC alpha-subunit.

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    Area of Science:

    • Immunogenetics
    • Human Leukocyte Antigen (HLA) research
    • Molecular immunology

    Background:

    • Human Leukocyte Antigen (HLA) class II molecules play a crucial role in immune responses.
    • Alloantisera are valuable tools for defining HLA specificities.
    • Previous classifications of alloantisera 8W1062 and 8W614 were anti-DR5 and anti-DR3, respectively.

    Purpose of the Study:

    • To characterize the reactivity of two specific alloantisera (8W1062 and 8W614).
    • To identify novel HLA specificities and their molecular targets.
    • To determine the genetic linkage of the locus controlling the DC alpha-subunit.

    Main Methods:

    • Depletion of DR and BR molecules from LG38 cell preparations using monoclonal antibodies and antisera against alpha-subunits.

    Related Experiment Videos

  • Enrichment of DC molecules in the preparation.
  • Testing alloantisera reactivity with the enriched preparation.
  • Inhibition studies with various HLA-typed individuals.
  • Isolation and characterization of alpha- and beta-subunits.
  • Family studies to assess HLA linkage.

    • Main Results:

    • Alloantisera 8W1062 and 8W614 reacted with a DC-enriched Ia preparation.
    • The reactivity was inhibited by DR3, DR5, and DRW13 positive individuals, suggesting a new supertypic specificity.
    • Both antisera bound to the alpha-subunit, not the beta-subunit, of DC molecules.
    • The novel specificity was named DC alpha 3.
    • Family studies confirmed the HLA linkage of the locus controlling the DC alpha-subunit.

    Conclusions:

    • A novel HLA specificity, DC alpha 3, has been identified, associated with the alpha-subunit of DC molecules.
    • This specificity is distinct from previously reported supertypic specificities.
    • Formal genetic criteria confirm the HLA linkage of the locus encoding the DC alpha-subunit, providing insights into immune system regulation.