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Related Experiment Videos

Mimicking anti-S simulating a delayed transfusion reaction.

N Puig1, F Carbonell, M A Soler

  • 1Hematology Service, La Fe Hospital, Valencia, Spain.

Vox Sanguinis
|January 1, 1987
PubMed
Summary

A rare autoantibody mimicking anti-S specificity was found in an S-s+ patient after transfusion. This autoantibody, detected via direct antiglobulin test (DAT), did not cause hemolytic anemia during a 3-year observation period.

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Area of Science:

  • Immunology
  • Transfusion Medicine
  • Hematology

Background:

  • Red blood cell alloimmunization can complicate transfusion management.
  • The S and s blood group antigens are part of the MNS system.
  • Autoantibodies can sometimes mimic alloantibodies, posing diagnostic challenges.

Observation:

  • An autoantibody with anti-S specificity was detected in a patient with S-s+ red blood cells two weeks post-transfusion.
  • The direct antiglobulin test (DAT) remained positive for 18 months.
  • Anti-S was successfully eluted from the patient's red blood cells, despite their S-s+ phenotype.

Findings:

  • In vitro absorption studies confirmed the autoantibody mimicked anti-S specificity.
  • The autoantibody was present for three years.

Related Experiment Videos

  • No hemolytic anemia was observed during the patient's follow-up.

    • Implications:

    • This case highlights the importance of differentiating autoantibodies from alloantibodies in transfusion medicine.
    • Understanding autoantibody specificity is crucial for accurate diagnosis and patient management.
    • Further research into the mechanisms of autoantibody formation and mimicry is warranted.