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A Study to Evaluate the Efficacy, Safety, Pharmacokinetics, and Pharmacodynamics of Subcutaneous Emicizumab in Participants From Birth to 12 Months of Age With Hemophilia A Without Inhibitors

NCT04431726 · Status: ACTIVE_NOT_RECRUITING · Phase: PHASE3 · Type: INTERVENTIONAL · Enrollment: 55

Last updated 2026-04-13

Study results available
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Summary

This is a Phase IIIb, multicenter, open-label, single-arm study of prophylactic emicizumab in previously untreated and minimally treated patients at study enrollment from birth to ≤12 months of age with severe hemophilia A (intrinsic factor VIII \[FVIII\] level \<1%) without FVIII inhibitors. The study is designed to evaluate the efficacy, safety, pharmacokinetics, and pharmacodynamics of emicizumab administered at 3 milligrams per kilogram of body weight (mg/kg) once every 2 weeks (Q2W) for 52 weeks. After 1 year of treatment, participants will continue to receive emicizumab (1.5 mg/kg once every week \[QW\], 3 mg/kg Q2W or 6 mg/kg once every 4 weeks \[Q4W\]) over a 7-year long-term follow-up period under this study frame.

Conditions

  • Severe Hemophilia A

Interventions

DRUG

Emicizumab

Initially, all participants will receive 4 loading doses of 3 milligrams per kilogram (mg/kg) emicizumab subcutaneously (SC) once every week (QW) for 4 weeks followed by the maintenance dosing regimen 3 mg/kg emicizumab SC once every 2 weeks (Q2W) for a total of 52 weeks. Starting from Week 17 of treatment, individual participants may have their dose up-titrated to 3 mg/kg SC QW if they experience suboptimal bleeding control. At the Week 53 clinic visit following consultation with the treating physician, parents/caregivers may elect for their child to continue with the maintenance 3-mg/kg SC Q2W dosing regimen or to switch to the maintenance 1.5-mg/kg SC QW or 6-mg/kg SC once every 4 weeks (Q4W) dosing regimen for the subsequent 7-year long-term follow-up period. During the study, participants will be treated with emicizumab until unacceptable toxicity, discontinuation from the study due to any cause, or other criteria specified in the protocol, whichever occurs first.

Sponsors & Collaborators

Principal Investigators

  • Clinical Trials · Hoffmann-La Roche

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
0 Months
Max Age
12 Months
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2021-02-04
Primary Completion
2023-05-22
Completion
2030-05-18
FDA Drug
Yes

Countries

  • United States
  • Australia
  • Austria
  • Belgium
  • Brazil
  • Canada
  • France
  • Germany
  • Israel
  • Italy
  • South Africa
  • Spain
  • Turkey (Türkiye)
  • United Kingdom

Study Locations

More Related Trials

Entities

Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04431726 on ClinicalTrials.gov