Ultragenyx Announces Completion of Dosing Across Stage 1 Cohorts in Pivotal Phase 1/2/3 Cyprus2+ Study Evaluating UX701 Gene Therapy for the Treatment of Wilson Disease
NOVATO, Calif., Jan. 25, 2024 (GLOBE NEWSWIRE) -- Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE) today announced that all patients have been dosed with UX701 across the three dose-escalation cohorts in Stage 1 of its pivotal Phase 1/2/3 Cyprus2+ study. The company's investigational AAV9 gene therapy is designed to deliver stable expression of the ATP7B copper transporter following a single intravenous infusion, with the goal of normalizing copper metabolism in patients with Wilson disease.
- Four of five patients enrolled in Cohort 1 had started tapering standard-of-care treatment, including two that came completely off of chelators and/or zinc therapy.
- This study evaluating UX701 for the potential treatment of Wilson disease is designed with three stages.
- In Stage 2, a new cohort of patients will be randomized 2:1 to receive the selected dose of UX701 or placebo.
- After the initial 52-week study period, all patients will have long-term follow up in Stage 3.