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In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients
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Transplantation tolerance: context matters.

Luis Graca1,2

  • 1Instituto de Medicina Molecular, Faculty of Medicine, University of Lisbon, Lisbon, Portugal.

European Journal of Immunology
|June 3, 2015
PubMed
Summary
This summary is machine-generated.

Costimulation blockade, particularly anti-CD154 antibody therapy, induces transplantation tolerance through multiple mechanisms. These include apoptosis, regulatory cell acquisition, and proliferation inhibition, highlighting a complex regulatory network for immune tolerance.

Keywords:
Activation-induced cell deathCD154Costimulation blockadeDonor-specific transfusionRegulatory T cellsTransplantation tolerance

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Area of Science:

  • Immunology
  • Transplantation Immunology
  • Regulatory T cell biology

Background:

  • Costimulation blockade is a key strategy for inducing immune tolerance in transplantation.
  • Despite extensive study, the precise molecular and cellular mechanisms of tolerance induction via costimulation blockade remain incompletely understood.

Purpose of the Study:

  • To elucidate the underlying mechanisms of transplantation tolerance induced by anti-CD154 monoclonal antibody therapy.
  • To investigate whether tolerance relies on a single regulatory pathway or a combination of mechanisms.

Main Methods:

  • Utilized anti-CD154 monoclonal antibody to induce transplantation tolerance in a model system.
  • Analyzed the cellular and molecular events associated with tolerance induction.

Main Results:

  • Transplantation tolerance induced by anti-CD154 antibody is not mediated by a single mechanism.
  • Tolerance relies on the coordinated action of multiple pathways, including apoptosis, the development of regulatory cells, and the inhibition of T cell proliferation.

Conclusions:

  • Immune tolerance following costimulation blockade involves a complex interplay of distinct tolerogenic pathways.
  • Understanding these combined mechanisms is crucial for developing more effective tolerance-inducing therapies for transplantation.