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Related Experiment Videos

Homozygous.D.

M Contreras, S Armitage, G L Daniels

    Vox Sanguinis
    |January 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    A rare RhD homozygous blood type was identified, distinct from other RhD types. This finding aids in distinguishing blood types for transfusions and understanding RhD variations.

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    Area of Science:

    • * Hematology
    • * Immunology
    • * Genetics

    Background:

    • * The Rh blood group system is crucial for blood transfusion compatibility.
    • * The RhD antigen is a key component of the Rh system, with various allelic expressions.
    • * Rare RhD genotypes, such as homozygous RhD (RhD.D./RhD.D.), present diagnostic challenges.

    Observation:

    • * Identification of an individual homozygous for the RhD complex (RhD.D./RhD.D.), associated with the rare Evans antigen.
    • * Serological testing demonstrated clear differentiation between RhD.D./RhD.D. and the previously described -D-/-D- genotype.
    • * The propositus's serum contained an immune antibody that reacted with a specific panel of red blood cells.

    Findings:

    • * The immune antibody in the propositus's serum exhibited reactivity with all tested red blood cells except those that were homozygous RhD.D./RhD.D., CwD-, cD-, and Rhnull.

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  • * This reactivity pattern provides a unique serological signature for the RhD.D./RhD.D. genotype.
  • * The study successfully distinguished the RhD.D./RhD.D. phenotype from the -D-/-D- phenotype through antibody analysis.

    • Implications:

    • * Improved serological methods for identifying rare blood group phenotypes, particularly within the Rh system.
    • * Enhanced understanding of RhD antigen expression and antibody production in individuals with rare genotypes.
    • * Potential to refine blood transfusion protocols and reduce the risk of transfusion reactions in patients with rare blood types.