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Updated: Aug 7, 2025
08:13
Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice
Published on: September 30, 2021
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Efficacy of emicizumab is maintained throughout dosing intervals for bleed prophylaxis
Steven W Pipe1, Ben Trzaskoma2, Miranda Minhas2
1Departments of Pediatrics and Pathology, University of Michigan, Ann Arbor, Michigan, USA.
Research and Practice in Thrombosis and Haemostasis
|March 13, 2023
Summary
Emicizumab provides consistent bleed protection in hemophilia A patients across all dosing schedules. This study found no clustering of bleeds within dosing intervals, supporting sustained efficacy.
Area of Science:
- Hematology
- Clinical Trials
- Pharmacology
Background:
- Emicizumab has demonstrated efficacy in hemophilia A patients, including those with factor VIII inhibitors.
- Emicizumab maintains protective levels throughout dosing intervals, irrespective of weekly, bi-weekly, or monthly regimens.
Purpose of the Study:
- To analyze the timing of treated bleeds within emicizumab dosing intervals.
- To evaluate bleed occurrence in relation to emicizumab dose timing in HAVEN 1-4 studies.
Main Methods:
- Post hoc analysis of pooled data from HAVEN 1-4 studies.
- Examination of treated bleed timing relative to emicizumab dosing schedules.
Main Results:
- 392 participants analyzed; 53.8% experienced treated bleeds.
- Mean annualized bleeding rate was 1.6 (SD 5.9).
- No evidence of bleed clustering on specific days within any dosing schedule (P > .05).
Conclusions:
- Emicizumab ensures consistent bleed prevention within dosing intervals for hemophilia A.
- Findings support emicizumab's sustained efficacy across approved regimens for reducing bleeds.
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