Adzynma in people with congenital TTP: a look at safety and antibody risk
Official title: A Post-Authorization Safety Study (PASS) to Further Evaluate Real-World Safety in Patients With Congenital Thrombotic Thrombocytopenic Purpura (cTTP) Treated With Adzynma
Run by Takeda · NCT07353099 · Data updated 2026-11-12
This study checks whether people with congenital TTP who have already received Adzynma develop neutralizing antibodies against Adzynma within six months of starting treatment.
Quick facts
| Study type | Observational |
|---|---|
| Sex | All |
| Enrollment | 50 (estimated) |
| Sponsor | Takeda Industry-sponsored |
| Locations | 7 sites (Vienna and 6 other locations) |
| Status | Recruiting |
| Started | May 26, 2026 |
| Main results expected | April 1, 2030 |
| Study ends | April 1, 2030 |
| Registry record updated | November 6, 2026 |
| Trial ID | NCT07353099 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are individuals with cTTP who have previously received Adzynma and can provide informed consent.
✕Probably not a fit
Patients without prior Adzynma treatment or those who develop neutralizing antibodies may not gain information applicable to their care.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study examines adults and children with congenital TTP who have been treated with Adzynma. It focuses on the risk of developing neutralizing antibodies to Adzynma within six months after first exposure in the study population. No new intervention is being tested, and the aim is to gather real-world safety data. Participants must have a documented Adzynma treatment and provide informed consent. The study is conducted at several European centers under Takeda sponsorship.
Why it matters
Potential benefit: If the study finds a low risk of neutralizing antibodies, it could support ongoing use of Adzynma with reassured safety in real-world settings.
How similar studies have gone: Similar observational experiences suggest monitoring for anti-drug antibodies is important, but this exact-focused assessment is relatively novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion criteria: 1. Is diagnosed with cTTP. 2. Had received commercially available Adzynma treatment for cTTP within the eligibility period of which there must be a recorded date and dose of at least one Adzynma administration in their medical chart. 3. Provides a signed informed consent form (informed consent form \[ICF\]; or assent and consent forms, if applicable), in accordance with local ethical and institutional requirements. Exclusion criteria: 1. Has a history or presence of a functional ADAMTS13 inhibitor (that is, neutralizing antibodies to ADAMTS13/rADAMTS13). 2. Has concurrent use of an investigational drug or is enrolled in another clinical trial at the time of index Adzynma infusion.
Where it's running
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AKH - Medizinische Universitaet Wien
Vienna, Austria Recruiting -
Universitatsklinikum Bonn
Bonn, Germany Recruiting -
Universitaetsklinikum Koeln
Cologne, Germany Recruiting -
Universitaetsklinikum Leipzig
Leipzig, Germany Recruiting -
Klinikum Rechts der Isar der Technischen Universitaet Muenchen
München, Germany Recruiting -
LMU Klinikum
München, Germany Recruiting
Show 1 more location
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Universitaetsklinikum Jena
Jena, Germany Not yet recruiting
Study contacts
- Study coordinator: Takeda Contact
- Email: medinfoUS@takeda.com
- Phone: +1-877-825-3327
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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cTTP patients treated with recombinant ADAMTS13: what happened after the early access program
This study looks at people with congenital TTP who received recombinant ADAMTS13 to see how treatment changes their health before and after use.
-
Long-term outcomes for people with immune TTP in the French national TMA cohort
This project uses past medical records to see long-term health outcomes and complications in people in France who had immune thrombotic thrombocytopenic purpura (iTTP).
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Survey of a treatment for congenital thrombotic thrombocytopenic purpura
This study is testing a new treatment called recombinant ADAMTS13 to see if it helps people with congenital thrombotic thrombocytopenic purpura feel better and stay healthy over 18 months.
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Registry for patients with immune-mediated thrombotic thrombocytopenic purpura in Italy
This study is tracking patients with immune-mediated thrombotic thrombocytopenic purpura in Italy to see how the disease affects them over time and what their treatment outcomes are.
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Registry for patients with Thrombotic Thrombocytopenic Purpura in Turkey
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.