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Clinical trial · Hereditary angioedema
The Phase 1/2 study that took lonvo-z into late-stage development
Official title: A Study of NTLA-2002 in Adults With Hereditary Angioedema
CompletedPhase I/IINCT05120830
Clinical researchBeing tested in people in registered clinical trials. Being in trials is not evidence that a treatment works or is safe.
What this trial is testing
The earlier trial of the hereditary angioedema treatment, testing whether a single infusion could reduce swelling attacks. Its results were published in a major medical journal and supported the move into the Phase 3 study that followed.
A Phase 1/2 study of NTLA-2002 in adults with hereditary angioedema, evaluating safety, pharmacodynamics and attack rate following a single dose. Results were published in the New England Journal of Medicine and supported progression to the Phase 3 HAELO study.
What a trial result does and does not mean
Early-phase results come from small numbers of participants and short follow-up. They can change with more people and more time, and a trial that is recruiting, active or even completed has not established that a treatment works. Enrolment criteria are strict; eligibility is decided by the trial site, never by a website.
Written by The CRISPR Atlas editorial teamLast updated Aug 25, 2026
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