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Immune tolerance induction: What have we learned over time?

H-H Brackmann1, G C White2, E Berntorp3

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Summary
This summary is machine-generated.

The Bonn protocol, a form of immune tolerance induction (ITI), effectively treats haemophilia A patients with inhibitors. Variations of this protocol offer flexibility, improving management for diverse patient populations.

Keywords:
Bonn protocolfactor VIIIhaemophilia Aimmune tolerance induction therapyinhibitorsvon Willebrand factor

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Area of Science:

  • Immunology
  • Hematology
  • Genetics

Background:

  • Inhibitory antibodies to factor VIII (FVIII) are a major complication in haemophilia A management.
  • The Bonn protocol, developed in the 1970s, established immune tolerance induction (ITI) using high-dose FVIII and prothrombin complex concentrates.
  • ITI has significantly improved the lives of haemophilia patients with inhibitors.

Purpose of the Study:

  • To review the history and evolution of the Bonn protocol for immune tolerance induction in haemophilia A.
  • To discuss factors influencing inhibitor development and ITI effectiveness.
  • To highlight ongoing research and clinical guidelines for ITI therapy.

Main Methods:

  • Historical review of the Bonn protocol and its variations.
  • Analysis of factors influencing inhibitor development, including FVIII defects and HLA types.
  • Examination of current clinical guidelines and ongoing studies in ITI therapy.

Main Results:

  • The Bonn protocol and its variations are effective in inducing immune tolerance in haemophilia A patients.
  • FVIII molecular defects and HLA type are key determinants of inhibitor development.
  • Clinical guidelines offer guidance for ITI, though consensus is not always complete.

Conclusions:

  • Immune tolerance induction, originating with the Bonn protocol, remains a cornerstone of haemophilia A management.
  • Understanding patient-specific factors is crucial for optimizing ITI strategies.
  • Further research, including the role of von Willebrand factor, is needed to refine ITI therapy.