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Histocompatibility and bone marrow transplantation (BMT).

K V Richter1

  • 1Institute of Blood Donation and Transfusion Service, Berlin, GDR.

Folia Haematologica (Leipzig, Germany : 1928)
|January 1, 1989
PubMed
Summary

The best stem cell donors are HLA-identical siblings or syngeneic twins. Donor selection for bone marrow transplantation (BMT) prioritizes HLA compatibility to minimize graft-versus-host disease (GVHD) risk.

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Area of Science:

  • Hematology
  • Immunology
  • Transplantation Medicine

Background:

  • Donor selection is critical for successful bone marrow transplantation (BMT).
  • Human Leukocyte Antigen (HLA) compatibility significantly impacts transplant outcomes.
  • Graft-versus-host disease (GVHD) is a major complication, influenced by HLA mismatches.

Purpose of the Study:

  • To outline the recommended order for selecting potential donors in BMT.
  • To emphasize the importance of HLA matching in donor selection.
  • To highlight factors influencing GVHD risk.

Main Methods:

  • Prioritizing donors based on HLA identity: syngeneic twins, HLA-identical siblings, HLA-haploidentical related donors, and HLA-phenoidentical unrelated donors.
  • Early HLA typing of patients and potential related donors for all known antigens.
  • Assessing cellular non-reactivity using mixed lymphocyte culture (MLC) where feasible.
  • Screening for donor-specific HLA antibodies in recipients.

Main Results:

  • The hierarchy of donor recommendation is syngeneic twins, HLA-identical siblings, HLA-haploidentical related donors, and then unrelated donors.
  • Increased HLA-A, -B, -DR incompatibilities correlate with higher GVHD risk.
  • Donor-specific HLA antibodies must be absent in the recipient.

Conclusions:

  • The described donor selection strategy aims to optimize BMT outcomes by prioritizing HLA compatibility.
  • Minimizing HLA mismatches is key to reducing GVHD.
  • Further research is needed for incorporating minor histocompatibility antigens into donor selection criteria.

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