Intellia Therapeutics(NTLA) Globenewswire·2025-06-15 14:45Core Insights - Intellia Therapeutics announced promising three-year follow-up data from the Phase 1 portion of its ongoing Phase 1/2 study for lonvoguran ziclumeran (lonvo-z) in patients with hereditary angioedema (HAE) [1][2] - All 10 patients in the Phase 1 study were attack-free and treatment-free for a median of nearly two years, demonstrating the potential of lonvo-z as a one-time therapy [2][6] - The global Phase 3 HAELO trial has completed screening ahead of schedule, with over half of the patients screened in the United States [4][6] Clinical Results - A single dose of lonvo-z led to a mean reduction in monthly HAE attack rate of 98% compared to pre-treatment baseline [2][6] - Patients showed deep, dose-dependent, and durable reductions in plasma kallikrein protein levels throughout the study [2][6] - The treatment was well tolerated, with the most frequent adverse events being infusion-related reactions, which were mostly Grade 1 and resolved without complications [3][6] Development Plans - The ongoing Phase 3 HAELO trial is randomized, double-blind, and placebo-controlled, assessing the safety and efficacy of lonvo-z at the 50 mg dosage [4][5] - Intellia plans to submit a biologics license application (BLA) in 2026, aiming for a U.S. launch in 2027 [4][8] - New data from the Phase 2 portion of the ongoing Phase 1/2 study is expected to be presented in the second half of 2025 [4][10] About Lonvo-z - Lonvo-z is based on CRISPR/Cas9 technology and aims to prevent HAE attacks by inactivating the kallikrein B1 (KLKB1) gene [8] - The therapy has received multiple regulatory designations, including Orphan Drug and RMAT Designation from the FDA [8][9] - Intellia is focused on leveraging gene editing technology to develop novel therapies that address unmet medical needs [9]