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Related Experiment Videos

Multi-modal antigen specific therapy for autoimmunity.

K L Legge1, J J Bell, L Li

  • 1Department of Microbiology, The University of Tennessee, Knoxville 37996-0845, USA.

International Reviews of Immunology
|March 14, 2002
PubMed
Summary
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Immunoglobulins delivering specific peptides effectively suppress experimental allergic encephalomyelitis (EAE) by down-regulating T cells. This approach shows promise for treating autoimmune diseases like EAE.

Area of Science:

  • Immunology
  • Neuroimmunology
  • Autoimmune Disease Research

Background:

  • Peripheral tolerance is a key strategy to control T cell responses and manage ongoing diseases.
  • Experimental Allergic Encephalomyelitis (EAE) serves as a model for studying autoimmune conditions affecting the central nervous system.

Purpose of the Study:

  • To investigate the use of immunoglobulins (Igs) engineered to present self and altered self peptides for modulating T cell responses.
  • To evaluate the efficacy of Ig-conjugated peptides in suppressing ongoing EAE.

Main Methods:

  • Genetically engineered immunoglobulins (Ig-PLP1 and Ig-PLP-LR) were created to present specific encephalitogenic peptides (PLP1 and PLP-LR).
  • These engineered Igs were administered to mice with active EAE to assess their therapeutic potential.

Related Experiment Videos

  • Mechanisms involving Fcgamma receptor (FcgammaR) crosslinking, IL-10 production by antigen-presenting cells (APCs), and T cell modulation were analyzed.

    • Main Results:

    • Both Ig-PLP1 and Ig-PLP-LR demonstrated suppression of subsequent relapses in mice with ongoing EAE.
    • Aggregation of Ig constructs led to FcgammaR crosslinking and IL-10 induction by APCs without upregulating costimulatory molecules.
    • IL-10 mediated bystander suppression, synergizing with peptide presentation to effectively modulate EAE.

    Conclusions:

    • Peptide presentation without costimulation, combined with IL-10-induced bystander suppression, offers an effective multi-modal strategy for T cell modulation in EAE.
    • Higher potency of Ig-PLP1 compared to Ig-PLP-LR suggests that peptide affinity is crucial for successful T cell modulation in this therapeutic approach.