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Exploiting apoptosis for therapeutic tolerance induction.

Daniel R Getts1, Derrick P McCarthy, Stephen D Miller

  • 1Department of Microbiology-Immunology and Interdepartmental Immunobiology Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611.

Journal of Immunology (Baltimore, Md. : 1950)
|November 19, 2013
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Summary
This summary is machine-generated.

Inducing immune tolerance using antigen-coupled apoptotic leukocytes shows promise for treating immune-mediated diseases. This method involves specific innate and adaptive immune interactions for T cell regulation, offering potential clinical applications.

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Area of Science:

  • Immunology
  • Translational Medicine
  • Autoimmunity Research

Background:

  • Immune tolerance is a key strategy for treating immune-mediated diseases but remains challenging to achieve.
  • Antigen-coupled apoptotic leukocytes (Ag-SP) have shown significant potential in preclinical models for inducing tolerance.
  • Existing research highlights the complex interplay between innate and adaptive immunity in Ag-SP tolerance induction.

Purpose of the Study:

  • To review the history and advantages of using apoptotic leukocytes for tolerance induction.
  • To discuss the current mechanistic understanding of Ag-SP-mediated immune tolerance.
  • To explore the clinical potential of this experimental therapeutic strategy.

Main Methods:

  • Utilizing ethylene carbodiimide to cross-link antigens to apoptotic leukocytes for delivery.
  • Investigating the role of scavenger receptor-mediated uptake by antigen-presenting cells (APCs).
  • Analyzing the upregulation of PD-L1 and IL-10 by splenic marginal zone macrophages.
  • Examining T cell regulation through cell-intrinsic anergy and regulatory T cell induction.

Main Results:

  • Ag-SP administration in mice demonstrated profound tolerance-inducing capabilities.
  • Successful treatment of T cell-mediated disorders including autoimmunity, allergy, and transplant rejection in preclinical studies.
  • Defined innate immune mechanisms involving APC uptake and specific macrophage signaling pathways (PD-L1, IL-10).

Conclusions:

  • Apoptotic Ag-coupled leukocytes represent a promising approach for inducing immune tolerance.
  • The underlying mechanisms involve a sophisticated interaction between innate and adaptive immune components.
  • This strategy holds significant clinical potential for managing immune-mediated diseases.