John Leonard

New Capabilities

As of May 2026: Led simultaneous Phase 3 data release and rolling BLA submission announcement on April 27, 2026

On April 27, 2026, Intellia Therapeutics reported results from Phase 3 testing of lonvoguran ziclumeran (lonvo-z), a one-time in-body CRISPR gene-editing therapy for hereditary angioedema. The 80-patient randomized double-blind trial found a single IV infusion cut debilitating swelling attack rates by 87% versus placebo (weeks 5-28); 62% of patients became attack-free and stopped all preventive medications. The safety profile was clean: no serious adverse events, and infusion-related reactions, headache, and fatigue—the most common complaints—were mild or moderate.

Updated May 31