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Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells
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Tregitope: Immunomodulation powerhouse.

Leslie Cousens1, Nader Najafian2, William D Martin1

  • 1EpiVax, Inc., Providence, RI, USA.

Human Immunology
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

Regulatory T cell epitopes, or Tregitopes, found in intravenous immunoglobulin (IVIg) explain its immune-modulating effects. These Tregitopes activate regulatory T cells, offering potential for improved transplantation and autoimmune disease treatment.

Keywords:
IVIgToleranceTransplantationTregTregitope

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Area of Science:

  • Immunology
  • Transplantation immunology
  • Autoimmunity

Background:

  • Intravenous immunoglobulin (IVIg) therapy is used in high-risk transplants, with regulatory T cells (Tregs) implicated in its mechanism.
  • Regulatory T cell epitopes, termed Tregitopes, have been identified within IgG, the primary component of IVIg.

Purpose of the Study:

  • To investigate the role of Tregitopes in IVIg's immunomodulatory effects.
  • To elucidate the mechanism by which Tregitopes activate Tregs and influence immune responses.

Main Methods:

  • Identification of Tregitopes within IgG.
  • In vitro studies using human peripheral blood mononuclear cells (PBMCs).
  • In vivo studies in animal models, including a skin transplantation model.

Main Results:

  • Tregitopes bind to human HLA Class II DR and are conserved across IgG isotypes and species.
  • Tregitopes activate Tregs in vitro and in vivo, inducing IL-10 production.
  • Tregitopes modulate dendritic cell phenotype and show efficacy in a transplantation model.

Conclusions:

  • Tregitopes are key mediators of IVIg's Treg-inducing effects.
  • Understanding Tregitopes can enhance IVIg therapy for transplantation and autoimmune diseases.
  • Tregitopes represent potential therapeutic targets for immune modulation.