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Intellia Therapeutics' Rare Genetic Disorder Therapy Meets Main Goal in ...

The one-time therapy left 62% of patients attack-free at six months as Intellia began a rolling Food and Drug Administration filing.

  • On Monday, Intellia Therapeutics reported its CRISPR gene-editing treatment, lonvoguran ziclumeran, reduced swelling attacks by 87% in a Phase 3 trial for hereditary angioedema .
  • Unlike Vertex Pharmaceuticals' ex vivo treatment Casgevy, this in vivo therapy edits DNA directly inside the body, targeting a condition affecting one in 50,000 people.
  • Six months after the one-time infusion, 62% of patients remained attack-free without other therapies, meeting the study's secondary goal. Intellia described safety as "favorable."
  • Intellia has initiated a rolling Food and Drug Administration submission and expects to complete filings in the second half of this year, targeting a U.S. launch in the first half of next year.
  • Cantor analyst Steve Seedhouse warned the therapy "will probably be a niche product" and cautioned about a potential "black box" warning, citing liver toxicity concerns in other Intellia CRISPR programs.
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biopharmadive.com broke the news on Monday, April 27, 2026.
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