Immune tolerance induction in paediatric patients with haemophilia A and inhibitors receiving emicizumab prophylaxis

Haemophilia : the Official Journal of the World Federation of Hemophilia
Glaivy BatsuliRobert F Sidonio

Abstract

The formation of neutralizing antifactor VIII (fVIII) antibodies, called inhibitors, is the most common complication in modern haemophilia A care. Novel non-factor replacement therapies, such as emicizumab, have sought to address the limitations of bypassing agents for bleeding management in patients with inhibitors. However, immune tolerance induction (ITI) remains the primary method for eradicating inhibitors and restoring the hemostatic response to fVIII. The aim of this study was to review a case series of paediatric patients with haemophilia A and inhibitors who have received ITI for inhibitor eradication concomitantly with emicizumab prophylaxis for bleeding prevention. Single institution retrospective chart review of paediatric patients with severe haemophilia A receiving ITI and emicizumab. Seven patients were included in this cohort. Six patients used three different recombinant fVIII products at 100 IU/kg three times per week, and one patient used a plasma-derived fVIII product at an initial dose of 50 IU/kg three times per week. Three patients achieved a negative inhibitor titre <0.6 Chromogenic Bethesda Units per mL (CBU/mL), and two patients achieved a normal fVIII recovery ≥66%. There were nine bleeding events in ...Continue Reading

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