Preventing Inhibitor Recurrence Indefinitely
Public ClinicalTrials.gov record NCT04621916. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Multi-center, Prospective Study Evaluating the Rate of Inhibitor Recurrence Following Successful ITI in Patients Receiving Ongoing Once Per Weekly Factor VIII Therapy Along With Emicizumab and in Patients Who Discontinue FVIII Therapy and Are on Emicizumab for Prophylaxis
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study will enroll children who have hemophilia A with inhibitors who successfully completed immune tolerance induction per the ISTH criteria (negative inhibitor titer, recovery \>66% of expected, and half-life of \>6 hours with their current FVIII concentrate). Previous to emicizumab, there was only one option for these patients which was to continue FVIII therapy in a prophylaxis mode to prevent bleeding. There was a sense that the ongoing FVIII served to maintain tolerance however no evidence for this notion exists and in fact what limited data is available suggests that continuing FVIII may not be necessary simply to maintain tolerance. To figure out this question, this will be a randomized, controlled 2 arm study which will randomize patients post-successful ITI to emicizumab plus weekly FVIII (for maintenance of tolerance) versus emicizumab alone. Patients will be followed for up to 2 years. We aim to enroll 52 subjects. The FVIII weekly arm can use any factor VIII concentrate and emicizumab is standard of care for inhibitor and non-inhibitor patients.
Study identification
- NCT ID
- NCT04621916
- Recruitment status
- Not listed
- Study type
- Interventional
- Phase
- Phase 4
- Enrollment
- 52 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 0 Years to 12 Years
- Sex
- Male
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Sep 20, 2020
- Primary completion
- Sep 19, 2024
- Completion
- Apr 19, 2025
- Last update posted
- Oct 4, 2023
2020 – 2025
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Childrens Hospital Los Angeles | Los Angeles | California | 90027 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04621916, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Oct 4, 2023 · Synced Sep 5, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04621916 live on ClinicalTrials.gov.