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Immunoreconstitution after human bone marrow transplantation.

F Zintl1, J Prager, A Sauerbrey

  • 1Universitäts-Kinderklinik und Poliklinik Jussuf Ibrahim, Jena.

Folia Haematologica (Leipzig, Germany : 1928)
|January 1, 1989
PubMed
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Bone marrow transplantation (BMT) impacts immune cell recovery. T4-lymphocytes decreased post-BMT, while T8-lymphocytes increased, leading to a prolonged low T4/T8 ratio, affecting immune reconstitution.

Area of Science:

  • Immunology
  • Transplantation Science

Background:

  • Bone marrow transplantation (BMT) is a critical procedure for various hematologic and oncologic conditions.
  • Graft-versus-host disease (GVHD) prophylaxis is essential for successful allogeneic BMT.
  • Understanding immunologic reconstitution post-BMT is vital for patient outcomes.

Purpose of the Study:

  • To investigate the kinetics of immunologic reconstitution following bone marrow transplantation.
  • To evaluate the impact of GVHD prophylaxis on immune cell recovery.
  • To assess long-term immune function up to 4 years post-BMT.

Main Methods:

  • Studied 24 patients (17 allogeneic, 7 autologous) undergoing BMT.
  • Administered GVHD prophylaxis with methotrexate and prednisone.

Related Experiment Videos

  • Conducted comprehensive immune evaluations pre-BMT and at multiple time points up to 4 years post-BMT.
  • Assessed lymphocyte counts (total, B, T3, T4, T8), T4/T8 ratio, NK cell activity, ADCC, blastogenic response, and serum immunoglobulins.

    • Main Results:

    • Absolute lymphocyte count, B-lymphocytes, and T3-lymphocytes normalized within 6 months post-BMT.
    • T4-lymphocytes showed a significant decrease within the first 180 days.
    • T8-lymphocytes increased post-6 months, exceeding normal levels.
    • The T4/T8 ratio remained significantly low (<0.8) for up to 48 months.
    • Patients with and without GVHD exhibited diminished lymphocyte response to PHA and Con A during the initial 6 months.

    Conclusions:

    • Immunologic reconstitution post-BMT is a prolonged process with distinct T-lymphocyte subset dynamics.
    • The T4/T8 ratio is significantly impaired long-term after BMT, potentially impacting adaptive immunity.
    • GVHD prophylaxis and the BMT procedure itself can transiently suppress lymphocyte responsiveness.