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CD40/CD154 interactions at the interface of tolerance and immunity
Sergio A Quezada1, Lamis Z Jarvinen, Evan F Lind
1Department of Microbiology and Immunology, Dartmouth Medical School, Lebanon, New Hampshire 03756, USA.
Annual Review of Immunology
|March 23, 2004
Summary
Blocking CD154, a ligand for CD40, can prevent autoimmune diseases and promote long-lived transplant tolerance. Preemptive blockade may enhance this effect by inducing tolerance before inflammation occurs.
Area of Science:
- Immunology
- Transplantation immunology
Background:
- The CD40-CD154 pathway is crucial for acquired immune responses, influencing both humoral and cell-mediated immunity.
- Blockade of CD40-CD154 interactions has shown promise in preventing autoimmune diseases and inducing graft tolerance.
Purpose of the Study:
- To explore the hypothesis that preemptive blockade of CD154 can induce long-lived allospecific tolerance in transplantation.
- To investigate the potential of CD154 blockade to co-opt peripheral tolerance mechanisms for inducing antigen-specific tolerance.
Main Methods:
- Review and discussion of existing scientific literature on CD40-CD154 interactions and transplantation tolerance.
- Presentation of a hypothesis regarding preemptive alpha CD154 blockade for inducing tolerance.
Main Results:
- CD154 blockade can abolish many inflammatory effector mechanisms.
- CD154 blockade may induce long-lived, antigen-specific tolerance in certain contexts.
Conclusions:
- Preemptive alpha CD154 blockade is hypothesized to be most effective for inducing long-lived allospecific tolerance by eliciting anergy and regulation before grafting-induced inflammation.
- This approach may leverage normal peripheral tolerance processes mediated by immature dendritic cells (DCs) to achieve long-lived antigen-specific tolerance.