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New hope for kids with rare swelling disorder as drug trial begins

NCT ID NCT07298447

Disease control Sponsor: Ionis Pharmaceuticals, Inc. Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 03, 2026 · Updated 4 times

Summary

This study tests a drug called donidalorsen in 20 children aged 2 to 12 with hereditary angioedema (HAE), a condition that causes sudden, painful swelling. The goal is to see if the drug is safe and how it works in young bodies. Researchers will monitor side effects and measure how well it prevents swelling attacks.

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

Phase 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

About 20 people

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

Started

Apr 2026

Expected to finish

Jun 2029

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.

Ages

2 to 11 years

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.

Key Inclusion Criteria: 1. Must be between the ages of 2 and less than 12 years, inclusive, at the time of informed consent and, as applicable, assent. 2. Must weigh at least 9 kg at the time of informed consent and, as applicable, assent. 3. Documented diagnosis of HAE-1/HAE-2 based upon both of the following: 1. Documented clinical history consistent with HAE (SC or mucosal, non-pruritic swelling episodes without accompanying urticaria). 2. Diagnostic testing results that confirm HAE-1/HAE-2: C1-inhibitor (C1-INH) functional level \<50% normal level AND complement factor C4 level below the lower limit of normal (LLN); OR a known pathogenic mutation in the SERPING1 gene. Key Exclusion Criteria: 1. Must not have any screening laboratory abnormalities or any other clinically significant abnormalities during screening that would render a participant unsuitable for inclusion. 2. Must not have been treated with another investigational drug, biological agent, or device within 1 month of Screening, or 5 half-lives of investigational agent, whichever is longer. 3. Concurrent diagnosis of any other type of recurrent angioedema, including idiopathic angioedema or HAE with normal C1-INH (HAE-nC1-INH or Type III). Note: Other protocol-specified inclusion/exclusion criteria may apply.

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Conditions

The condition(s) this trial relates to.

hereditary angioedema hereditary angioedema type 1 hereditary angioedema type 2

As listed by the trial registrant

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

Hereditary angioedema (HAE)

How to take part

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

  1. The places running it

    16 sites in 5 countries. The list below names each one and where it is.

  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

Locations

  • Ionis Investigative Site

    RECRUITING

    Santa Monica, California, 90404, United States

  • Ionis Investigative Site

    RECRUITING

    Miami, Florida, 33136, United States

  • Ionis Investigative Site

    RECRUITING

    Baton Rouge, Louisiana, 70809, United States

  • Ionis Investigative Site

    RECRUITING

    St Louis, Missouri, 63141, United States

  • Ionis Investigative Site

    RECRUITING

    Cincinnati, Ohio, 45236, United States

  • Ionis Investigative Site

    RECRUITING

    Cleveland, Ohio, 44195, United States

  • Ionis Investigative Site

    RECRUITING

    Hershey, Pennsylvania, 17033, United States

  • Ionis Investigative Site

    RECRUITING

    West Allis, Wisconsin, 53214, United States

  • Ionis Investigative Site

    RECRUITING

    South Brisbane, Queensland, 4101, Australia

  • Ionis Investigative Site

    RECRUITING

    Clayton, Victoria, 3168, Australia

  • Ionis Investigative Site

    RECRUITING

    Milan, 20157, Italy

  • Ionis Investigative Site

    RECRUITING

    Padova, 35128, Italy

  • Ionis Investigative Site

    RECRUITING

    Roma, 00133, Italy

  • Ionis Investigative Site

    RECRUITING

    San Donato Milanese, 20097, Italy

  • Ionis Investigative Site

    RECRUITING

    Warsaw, 04-501, Poland

  • Ionis Investigative Site

    RECRUITING

    Barcelona, 08035, Spain

More trials for these conditions

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