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Minor Histocompatibility Antigen-Specific T Cells.

Corinne Summers1,2, Vipul S Sheth1, Marie Bleakley1,2

  • 1Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States.

Frontiers in Pediatrics
|June 26, 2020
PubMed
Summary
This summary is machine-generated.

Minor Histocompatibility (H) antigens are key targets for enhancing graft-versus-leukemia effects in hematopoietic stem cell transplantation (HCT). Strategies focus on engineering T cells to combat leukemia relapse, especially in pediatric patients.

Keywords:
T cell immunotherapygraft engineeringgraft-vs.-leukemiahematopoietic stem cell transplantationleukemiaminor histocompatibility antigenpediatricpolymorphism

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Area of Science:

  • Immunology
  • Transplantation Biology
  • Oncology

Background:

  • Minor Histocompatibility (H) antigens are peptides presented by MHC/HLA molecules, differing between donors and recipients due to genetic variations.
  • These antigens play a crucial role in allogeneic hematopoietic stem cell transplantation (HCT), influencing both graft-versus-host disease (GVHD) and graft-versus-leukemia (GVL) responses.
  • Understanding minor H antigens is vital for optimizing HCT outcomes and minimizing complications.

Purpose of the Study:

  • To review the therapeutic potential of minor H antigens as targets for T cell-based immunotherapies in HCT.
  • To discuss strategies for engineering donor T cells to enhance GVL effects and prevent leukemia relapse.
  • To highlight the significance of these advancements for pediatric HCT.

Main Methods:

  • Review of current literature on minor H antigens and their role in HCT.
  • Discussion of graft engineering techniques to enhance T cell activity against minor H antigens.
  • Analysis of adoptive T cell immunotherapy approaches post-HCT.

Main Results:

  • Minor H antigens can be selectively targeted to augment GVL responses, particularly those restricted to hematopoietic cells.
  • Engineered T cells and post-HCT immunotherapy show promise in preventing or managing leukemia relapse after HCT.
  • Targeting minor H antigens offers a strategy to reduce HCT toxicity and late effects, especially beneficial for pediatric patients.

Conclusions:

  • Minor H antigens represent valuable targets for improving the efficacy of HCT by enhancing GVL and reducing relapse.
  • Graft engineering and adoptive T cell immunotherapy strategies are crucial for maximizing the therapeutic benefits of minor H antigen-specific T cells.
  • These advancements hold significant promise for improving long-term outcomes in pediatric HCT recipients.