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Personalized Peptide Arrays for Detection of HLA Alloantibodies in Organ Transplantation
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Antigen Presentation in Transplantation.

Maria-Luisa Alegre1, Fadi G Lakkis2, Adrian E Morelli3

  • 1Department of Medicine, University of Chicago, 924 East 57th Street, JFK-R312, Chicago, IL 60637, USA.

Trends in Immunology
|October 17, 2016
PubMed
Summary
This summary is machine-generated.

Transplant rejection is T cell-dependent, requiring mature dendritic cells (DCs) to present donor antigens. Novel insights reveal DC licensing by microbiota, allogeneic recognition, and exosome capture are key for productive antigen presentation.

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Area of Science:

  • Immunology
  • Transplantation Biology
  • Cellular and Molecular Medicine

Background:

  • Solid organ transplantation between genetically distinct individuals triggers T cell-dependent rejection without immunosuppression.
  • Graft rejection involves the presentation of donor antigens by mature dendritic cells (DCs) to host T cells.

Purpose of the Study:

  • To review novel insights into dendritic cell (DC) maturation and differentiation steps crucial for presenting transplant antigens.
  • To elucidate mechanisms enhancing DC presentation of donor antigens for T cell activation.

Main Methods:

  • Review of current literature on dendritic cell biology and transplantation immunology.
  • Analysis of DC maturation pathways, including microbiota licensing, allogeneic recognition, and exosome uptake.

Main Results:

  • DC maturation is a multi-step process essential for initiating T cell responses against transplanted organs.
  • Microbiota licensing, recognition of non-self (allogeneic) antigens, and uptake of donor cell exosomes are critical for DC function in transplantation.

Conclusions:

  • Understanding DC maturation and differentiation is vital for developing strategies to control transplant rejection.
  • Targeting DC pathways, including exosome-mediated antigen amplification, may offer new therapeutic approaches in transplantation.