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[MLC reactivity demonstrates transfusion-induced immunosuppression]

J Zingsem1, V Weisbach, T Zeiler

  • 1Abteilung für Transfusionsmedizin, Friedrich-Alexander-Universität Erlangen, Deutschland.

Beitrage Zur Infusionstherapie Und Transfusionsmedizin = Contributions to Infusion Therapy and Transfusion Medicine
|January 1, 1994
PubMed
Summary

Blood transfusions may suppress the immune system, as indicated by reduced lymphocyte response in cardiac surgery patients post-transfusion. Further research is needed to explore if filtered transfusions can mitigate this immunosuppressive effect.

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Area of Science:

  • Immunology
  • Transfusion Medicine
  • Surgical Oncology

Background:

  • Improved graft survival in pre-transfusion renal transplant recipients suggests blood transfusions possess immunosuppressive properties.
  • Understanding transfusion-induced immunosuppression is crucial, particularly given potential links to cancer recurrence.

Purpose of the Study:

  • To investigate the early immunosuppressive effects of blood transfusions in patients undergoing cardiac surgery.
  • To assess changes in lymphocyte reactivity following transfusion of autologous red cells and homologous platelet concentrates.

Main Methods:

  • Studied 12 cardiac surgery patients receiving autologous red cells and HLA class-I-matched platelet transfusions.
  • Monitored for red cell and lymphocytotoxic antibodies.

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  • Assessed lymphocyte response using mixed lymphocyte culture (MLC) pre- and post-transfusion.

    • Main Results:

    • No patients developed red cell or lymphocytotoxic antibodies.
    • A transient reduction in lymphocyte response to donor cells was observed in the first 4 days post-transfusion (MLC).
    • MLC reactivity returned to baseline by days 4-5 and exceeded baseline by day 6.

    Conclusions:

    • Observed changes in MLC reactivity suggest early signs of transfusion-induced immunosuppression.
    • Further studies are warranted to determine if leukocyte-depleted red cell transfusions can prevent this immunosuppressive effect.
    • Investigating the link between intraoperative transfusions and cancer relapse is essential.