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Related Experiment Videos

Posttransplant immune-mediated hemolysis.

Robert J Sokol1, Robert Stamps, David J Booker

  • 1National Blood Service, Trent Center, Sheffield, UK. carol.mitchell@nbs.nhs.uk

Transfusion
|March 16, 2002
PubMed
Summary
This summary is machine-generated.

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Post-transplant immune hemolysis can occur through various complex mechanisms, including autoimmune hemolytic anemia and passenger lymphocyte syndrome. Understanding these causes is crucial for effective management of transplant recipients.

Area of Science:

  • Transplantation Immunology
  • Hematology

Background:

  • Immune-mediated hemolysis is a known complication following transplantation.
  • Diverse mechanisms contributing to post-transplant immune hemolysis require comprehensive understanding.

Observation:

  • Case 1: Autoimmune hemolytic anemia developed 7 months post-bone marrow transplant due to warm autoantibodies.
  • Case 2: Passenger lymphocyte syndrome caused severe hemolysis 14 days post-lung transplant from an ABO-incompatible donor.
  • Case 3: Mixed immune hemolysis occurred post-peripheral blood progenitor cell transplant, involving recipient antibodies against donor RBCs and subsequent autoimmune hemolytic anemia.

Findings:

  • Patient 1 presented with warm autoantibodies and a positive direct antiglobulin test (DAT) for IgG, IgM, and C3d.
  • Patient 2 showed a positive DAT for IgG, with anti-A antibodies identified in serum and eluate, indicative of passenger lymphocyte syndrome.

Related Experiment Videos

  • Patient 3 exhibited hemolysis due to recipient anti-D antibodies targeting donor RBCs, followed by autoimmune hemolytic anemia with a positive DAT for IgG.

    • Implications:

    • Understanding the diverse mechanisms of post-transplant immune hemolysis is essential for effective patient management.
    • Increasing long-term survival rates in unrelated bone marrow and PBPC transplant recipients will likely lead to more frequent complex serologic issues, including chimerism-related problems.