Intellia Therapeutics said Monday that a single dose of its gene editing treatment dramatically reduced swelling attacks in patients with a rare genetic disorder in a Phase 3 trial, setting up a potential approval.
The therapy, known as lonvo-z, would be the second approved CRISPR-based medicine, after Vertex Pharmaceutical’s sickle cell treatment Casgevy. Intellia has already initiated a rolling submission with the agency. It would be the first in vivo treatment, meaning it edits patients’ DNA directly in the body.
In the 80-patient study, volunteers with hereditary angioedema (HAE) who received lonvo-z saw their attack rates drop 87%, relative to placebo. Just over 60% were entirely attack-free over the period, compared to 11% for the placebo patients.
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