New drug aims to stop bleeds in rare blood disorder
NCT ID NCT06998524
First seen Jun 27, 2026 · Last updated Sep 10, 2026 · Updated 5 times
Summary
This study tests a medicine called emicizumab to prevent bleeding episodes in people with Type 3 von Willebrand disease, a severe inherited bleeding disorder. About 75 participants, from infants to adults, will receive either emicizumab or continue their current treatment. The goal is to see if emicizumab reduces the number of bleeds that need medical treatment.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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About 75 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jun 2025
- Expected to finish
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Apr 2029
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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1 month and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Confirmed diagnosis of Type 3 von Willebrand disease (VWD), based on medical records * Preexisting medical record verifying the status of von Willebrand factor (VWF) inhibitor (positive or negative, including titer if available) * Adequate hematologic, hepatic, and renal function * For participants of childbearing potential: agreement to remain abstinent or adhere to the contraception requirements Additional Inclusion Criteria for Arms A and B: * Age ≥1 month at the time of signing Informed Consent/Assent Form * Documented previous use of on-demand therapy with intermittent (less than once a week) on-demand SOC therapy for VWD * Having ≥2 treated bleeds (except menstrual bleeds) with factor concentrate within 24 weeks prior to enrollment Additional Inclusion Criteria for Arm C: * Age ≥2 years at the time of signing Informed Consent/Assent Form * Documented and confirmed previous use of SOC prophylactic therapy for VWD (1-3 times weekly, as per prescribed dose) as described in the eligibility of Study WP45335 * Have completed all study requirements as defined in the WP45335 protocol for at least 24 weeks Exclusion Criteria: * Inherited or acquired bleeding disorder other than Congenital Type 3 VWD * History of gastrointestinal bleeding within 18 months prior to enrollment, or any previous diagnosis of angiodysplasia * History of intracranial hemorrhage * Previous or current treatment for thromboembolic disease or signs of thromboembolic disease * Other conditions (e.g., certain autoimmune diseases) that may increase risk of bleeding or thrombosis * History of clinically significant hypersensitivity associated with monoclonal antibody therapies or components of the emicizumab injection * Use of systemic immunomodulators (e.g., interferon) at enrollment or planned use during the study, with the exception of anti-retroviral therapy
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
29 sites in 14 countries. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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AOU Careggi
RECRUITINGFlorence, Tuscany, 50134, Italy
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Charlotte Maxeke Johannesburg Academic Hospital
RECRUITINGJohannesburg, 2193, South Africa
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Erasmus MC
RECRUITINGRotterdam, 3015 GD, Netherlands
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Gerinnungszentrum Rhein-Ruhr;Gerinnungsambulanz
RECRUITINGDuisburg, 47051, Germany
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Great Ormond Street Hospital
RECRUITINGLondon, WC1N 3JH, United Kingdom
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Groupe Hospitalier Necker Enfants Malades
RECRUITINGParis, 75015, France
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Hopital Claude Huriez - CHU Lille
RECRUITINGLille, 59037, France
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Hospital Universitario Virgen del Rocio
RECRUITINGSeville, 41013, Spain
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Hospital Universitario la Paz
RECRUITINGMadrid, 28046, Spain
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Hämophiliezentrum Med. Klinik III/Institut für Transfusionsmedizin
RECRUITINGFrankfurt/M., 60590, Germany
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IPS SURA Industriales Medellín
RECRUITINGMedellín, Colombia
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IRCCS Ca' Granda Ospedale Maggiore Policlinico
RECRUITINGMilan, Lombardy, 20122, Italy
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Instytut Hematologii i Transfuzjologii
RECRUITINGWarsaw, 02-776, Poland
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Kurume University Hospital
RECRUITINGFukuoka, 830-0011, Japan
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Manchester Royal Infirmary
RECRUITINGManchester, M13 9WL, United Kingdom
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McGill University Health Center
RECRUITINGMontreal, Quebec, H4A 3J1, Canada
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Nagoya University Hospital
RECRUITINGNagoya, 466-8560, Japan
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Sahlgrenska Universitetssjukhuset
RECRUITINGGothenburg, S-413 45, Sweden
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St Thomas' Hospital
RECRUITINGLondon, SE1 7EH, United Kingdom
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The Hospital for Sick Children
RECRUITINGToronto, Ontario, M5G 1X8, Canada
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UC Davis
RECRUITINGSacramento, California, 95817, United States
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UZ Leuven Gasthuisberg
RECRUITINGLeuven, 3000, Belgium
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Universita' Degli Studi La Sapienza-Ist.Di Ematologia
RECRUITINGRome, Lazio, 00161, Italy
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University of Florida
RECRUITINGGainesville, Florida, 32610, United States
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University of Kentucky Children's Hospital
RECRUITINGLexington, Kentucky, 40536, United States
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University of Minnesota Medical Center
RECRUITINGMinneapolis, Minnesota, 55455, United States
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Universitätsklinikum Bonn
RECRUITINGBonn, 53127, Germany
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Virginia Commonwealth University
RECRUITINGRichmond, Virginia, 23298-0461, United States
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Washington University School of Medicine
RECRUITINGSt Louis, Missouri, 63110, United States
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