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Functional Implications of the Structural Diversity of Murine Ia and Human DR Antigens

  • Jack Silver

Abstract

The survival of an organism depends on the ability of its cells to recognize each other and their immediate environment. The immune responses found in most vertebrates are prime instances of vitally important interactions among subpopulations of cells. In the sophisticated immune system of mammals, the generation of immune responses requires interactions among T cells, B cells, and macrophages. The I and HLA-D regions of the murine and human major histocompatibility complexes (MHC) contain genes that regulate these cell interactions. This role for these genes was recognized with the observation that subpopulations of immune cells from individuals possessing different forms (haplotypes) of the MHC failed to interact. The cellular interactions genetically regulated by the MHC are apparently mediated by cell-surface glycoproteins known as Ia antigens in mice and HLA-DR antigens in humans. These molecules display a high degree of serological and structural polymorphism, a consequence of the high degree of polymorphism of the MHC. The genetic restrictions placed on cellular interactions by the MHC presumably reflect the requirement for recognition of haplotype-specific Ia or HLA-DR antigens. Consequently, molecular analysis of the structural diversity of Ia and HLA-DR antigens provides a basis for understanding how cells recognize and communicate with each other.

Keywords

Murine Major Histocompatibility Complex Tritiated Amino Acid Terminal Sequence Analysis Sophisticated Immune System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • Jack Silver
    • 1
  1. 1.Department of Cellular and Developmental ImmunologyScripps Clinic and Research FoundationLa JollaUSA

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