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~ Sustained increases in Factor IX (FIX) levels with mean FIX activity of 41.5 percent of normal in full study population one year following a single administration of etranacogene dezaparvovec~
~ Held pre-BLA submission meeting with FDA and aligned on primary endpoint analysis ~
LEXINGTON, Mass. and AMSTERDAM, June 22, 2021 (GLOBE NEWSWIRE) -- uniQure N.V. (NASDAQ: QURE), a leading gene therapy company advancing transformative therapies for patients with severe medical needs, today announced positive 52-week clinical data on all patients from its pivotal, Phase III HOPE-B gene therapy trial of etranacogene dezaparvovec, an investigational adeno-associated virus five (AAV5)-based gene therapy for the treatment of patients with severe and moderately severe hemophilia B. These are the first clinical data to be reported from a Phase III gene therapy study in hemophilia B and, with 54 patients, the largest set of hemophilia B patients receiving a single gene therapy investigational product to date.
Data from the HOPE-B pivotal study showed that participants continued to demonstrate durable, sustained increases in Factor IX (FIX) activity at 52-weeks post-infusion with a mean FIX activity of 41.5 percent of normal, as measured by a one-stage APTT-based clotting assay, compared to a mean FIX activity of 39.0 percent of normal at 26-weeks of follow-up. There continued to be no clinically significant correlation between pre-existing neutralizing antibodies to AAV5 (NAbs) and FIX activity in patients with NAb titers up to 678.2, a range expected to include more than 93 percent of the general population.
During the 52-week period, a single dose of etranacogene dezaparvovec significantly reduced the annualized rate of bleeding requiring treatment by 80 percent from a prospectively collected 3.39 at baseline to 0.68 bleeding episodes per year (p-value
