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Related Experiment Videos

Further antigenic determinants on HLA-A molecules.

P Richiardi, T Crepaldi, F Malavasi

    Tissue Antigens
    |February 1, 1985
    PubMed
    Summary

    Monoclonal antibodies identified a novel antigenic determinant on HLA molecules A2, 3, 28, 29, 30, 31, and w33. This epitope is distinct from previously known A3 and A2 determinants, as shown by various immunological assays.

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    Area of Science:

    • Immunogenetics
    • Molecular immunology

    Background:

    • Human Leukocyte Antigen (HLA) molecules play a crucial role in immune responses.
    • Characterizing novel antigenic determinants is essential for understanding HLA polymorphism and its implications.

    Purpose of the Study:

    • To identify and characterize a new polymorphic antigenic determinant detected by monoclonal antibodies.
    • To investigate the relationship of this new determinant to known HLA epitopes.

    Main Methods:

    • Utilized monoclonal antibodies (MoAbs) for antigen detection.
    • Conducted population and family studies, including HLA-A,B recombinant families.
    • Performed lysostrip and competition experiments with radiolabeled MoAbs and B lymphoblastoid cell lines.

    Main Results:

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    • A novel polymorphic antigenic determinant was identified, shared by HLA-A2, 3, 28, 29, 30, 31, and w33.
    • Competition experiments revealed this epitope is spatially distant from known A3 epitopes and certain A2 epitopes.
    • Polyclonal anti-HLA-A2 alloantisera could inhibit the binding of MoAbs to the new determinant.

    Conclusions:

    • A new, broadly shared HLA antigenic determinant has been characterized.
    • This finding contributes to the detailed mapping of HLA epitopes and their structural relationships.