Clinical trial Recruiting at 6 sites Observational

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.

More Thrombotic Thrombocytopenic Purpura (TTP) trials

Quick facts

Study typeObservational
SexAll
Enrollment50 (estimated)
SponsorTakeda
Industry-sponsored
Locations7 sites (Vienna and 6 other locations)
StatusRecruiting
StartedMay 26, 2026
Main results expectedApril 1, 2030
Study endsApril 1, 2030
Registry record updatedNovember 6, 2026
Trial IDNCT07353099 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

  • 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
  • Universitaetsklinikum Jena
    Jena, Germany
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.