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Related Concept Videos

Tissue Transplantation01:24

Tissue Transplantation

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Tissue transplantation is a significant medical procedure involving the transfer of cells, tissues, or organs from a donor to a recipient, with the primary aim of restoring lost functions. This procedure is crucial in treating a broad spectrum of diseases, including kidney diseases, liver failure, heart disease, and certain types of cancers.
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
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Cell-mediated Immune Responses01:40

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Selective H2-O Tissue Expression Reduces Risk for Graft-versus-Host Disease in an In Vivo Transplantation Model.

J Zeun1, A L Bernhardt1, S Neubeck1

  • 1Department of Medicine 5 - Hematology/Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.

Transplantation and Cellular Therapy
|May 8, 2025
PubMed
Summary

Targeting donor T cells against specific antigens can separate graft-versus-leukemia (GVL) from graft-versus-host disease (GVHD) after allogeneic stem cell transplantation (aSCT). This approach minimizes GVHD while preserving the anti-leukemia effect, improving patient outcomes.

Keywords:
Allogeneic stem cell transplantationCD4 donor lymphocyte infusion (DLI)DM-resistant antigensDM-sensitive antigensGraft-versus-host disease

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Area of Science:

  • Immunology
  • Transplantation Biology
  • Oncology

Background:

  • Allogeneic stem cell transplantation (aSCT) uses donor T cells for graft-versus-leukemia (GVL) effect but risks graft-versus-host disease (GVHD).
  • HLA-class II restricted antigens are classified as DM-resistant or DM-sensitive, with DM-sensitive antigens presented via HLA-DO.
  • HLA-DO's restricted expression suggests CD4+ T cells targeting DM-sensitive antigens could separate GVL from GVHD.

Purpose of the Study:

  • To demonstrate HLA-DO's influence on GVHD severity in aSCT.
  • To investigate the potential of targeting DM-sensitive antigens to separate GVL from GVHD.

Main Methods:

  • Generated a modified CD4+ donor lymphocyte infusion (DLI) lacking T cells against DM-resistant antigens.
  • Utilized an in vivo MHC mismatch transplantation model with H2-O (HLA-DO equivalent) wildtype, knockout, and transgenic recipients.

Main Results:

  • Modified CD4+ DLI targeting DM-sensitive antigens induced mild GVHD in wildtype recipients.
  • No GVHD was observed in H2-O knockout recipients.
  • Immunogenic potential of DM-sensitive antigens was assessed in H2-O transgenic recipients.

Conclusions:

  • DM-resistant antigens are key targets of GVHD.
  • Targeting DM-sensitive antigens shows promise for separating GVL from GVHD.
  • This strategy could improve outcomes in allogeneic stem cell transplantation.