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New hope for rare blood disorder: study reviews real-world use of enzyme therapy

NCT ID NCT07429942

Knowledge-focused Sponsor: Takeda Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Aug 28, 2026 · Updated 3 times

Summary

This study looks back at medical records of people with congenital thrombotic thrombocytopenic purpura (cTTP), a rare inherited blood disorder that causes dangerous blood clots. Participants received a manufactured version of the missing ADAMTS13 enzyme through an early access program. Researchers will compare episodes and symptoms before and during treatment to see how well the therapy works in real life.

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.

Participants

About 94 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Oct 2026

An estimate. End dates often move.

Lead sponsor

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.

Who is studied

Adult and pediatric participants treated with rADAMTS13 via the EAP at participating centers will be included in this study.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion criteria for the rADAMTS13 EAP are: * Participants of any age can participate who have a confirmed diagnosis of severe congenital ADAMTS13 deficiency or cTTP. * Participants must be on preventative or prophylactic treatment for cTTP or must have had at least one TTP event in the past. * Participants must have no other treatment options available (this includes other clinical studies for cTTP). The inclusion criteria for this retrospective chart review are: * Pediatric and adult participants (no age restrictions) with cTTP, treated with rADAMTS13 via the EAP, who received at least two administrations of rADAMTS13 and who have provided consent (or the legal guardians) to participate in this retrospective chart review. * As per local regulations, evidence of a personally signed (or signed by a legally acceptable representative) and dated informed consent form/informed assent form (ICF/IAF) indicating that the participant (or their legal guardian) has been informed of all pertinent aspects of the retrospective chart review or an approval to process data without informed consent granted by an institutional review board/independent ethics committee (IRB/IEC)) Participants included in the EAP who were/are transitioned to the commercially available product will have their data abstracted for the duration of their participation in the EAP as well as when they received the commercially available product until the end of chart abstraction. There are no additional exclusion criteria for this chart review.

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Conditions

The condition(s) this trial relates to.

congenital thrombotic thrombocytopenic purpura thrombotic thrombocytopenic purpura

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Thrombotic thrombocytopenic purpura (TTP)

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

Study contacts

  • Contact

    Email: •••••@•••••

More trials for these conditions

Other studies related to the condition(s) this trial covers.