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Induction of antigen-specific immunosuppression by CD95L cDNA-transfected 'killer' dendritic cells

H Matsue1, K Matsue, M Walters

  • 1Department of Dermatology, University of Texas Southwestern Medical Center, Dallas 75235-9069, USA.

Nature Medicine
|July 30, 1999
PubMed

Insights

Researchers developed

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Dendritic cells (DCs) are key antigen-presenting cells.
  • DCs typically activate naive T cells.
  • T cell activation is central to immune responses.

Purpose of the Study:

  • To investigate the immunomodulatory potential of DCs engineered to express CD95 ligand (CD95L).
  • To explore the use of these modified DCs, termed 'killer' DCs, for immune suppression.

Main Methods:

  • Transfection of DCs with CD95L cDNA to create 'killer' DCs.
  • Antigen pulsing of killer DCs.
  • Administration of killer DCs to mice before and after sensitization.
  • Assessment of immune responses upon subsequent challenge.

Main Results:

  • Killer DCs induced T cell death instead of activation after antigen-specific interaction.
  • Pre-sensitization administration of killer DCs led to antigen-specific immunosuppression.
  • Post-sensitization administration of killer DCs almost completely suppressed immune responses.

Conclusions:

  • Engineered 'killer' DCs offer a novel approach to immune modulation.
  • This strategy shows potential for preventing and treating T cell-mediated inflammatory diseases.
  • Killer DCs represent a new immunomodulatory protocol with therapeutic implications.

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