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Related Experiment Video

Updated: Apr 3, 2026

In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients
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Inhibitor recurrence after immune tolerance induction: a multicenter retrospective cohort study.

A Antun1, P E Monahan2, M J Manco-Johnson3

  • 1Department of Hematology and Medical Oncology, Emory University, Atlanta, GA, USA.

Journal of Thrombosis and Haemostasis : JTH
|September 19, 2015
PubMed
Summary

Inhibitor recurrence after immune tolerance induction (ITI) for hemophilia A is linked to immune modulation during ITI and lower Factor VIII (FVIII) recovery. Adherence to FVIII prophylaxis post-ITI does not significantly impact recurrence risk.

Keywords:
hemophiliaimmune toleranceincidenceprophylaxisrecurrence

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Area of Science:

  • Hematology
  • Immunology
  • Pediatric Medicine

Background:

  • Immune tolerance induction (ITI) is a key treatment for congenital hemophilia A, achieving success in up to 70% of patients.
  • Predictors of ITI response are understood, but factors influencing inhibitor recurrence post-ITI remain unclear.

Purpose of the Study:

  • To investigate the association between clinical characteristics and inhibitor recurrence in hemophilia A patients who achieved tolerance post-ITI.
  • Specifically, to assess the role of adherence to Factor VIII (FVIII) prophylaxis after ITI in inhibitor recurrence.

Main Methods:

  • A multicenter retrospective cohort study analyzed 64 hemophilia A patients with FVIII levels <2% post-ITI.
  • Kaplan-Meier method estimated cumulative inhibitor recurrence probability.
  • Logistic regression assessed associations between clinical factors and recurrence.

Main Results:

  • The cumulative probability of inhibitor recurrence at 1 and 5 years was 12.8% and 32.5%, respectively.
  • Recurrent inhibitors were associated with immune modulation during ITI (OR 3.8) and FVIII recovery <85% post-ITI (OR 2.6).
  • Adherence to post-ITI FVIII prophylaxis was not significantly associated with recurrence (OR 0.5).

Conclusions:

  • Immune modulation during ITI and suboptimal FVIII recovery post-ITI are linked to increased inhibitor recurrence risk.
  • Adherence to FVIII prophylaxis after successful ITI is not a primary factor in preventing inhibitor recurrence.