Efanesoctocog alfa is the first factor VIII therapy to be awarded Breakthrough Therapy designation by the FDA
Designation is based on XTEND-1 phase 3 study data demonstrating a clinically meaningful prevention of bleeds and superiority in prevention of bleeding episodes compared to prior prophylaxis factor treatment
Efanesoctocog alfa is a novel and investigational factor VIII therapy designed to provide normal to near-normal factor activity levels for the majority of the week in a once-weekly prophylactic treatment regimen
Breakthrough Therapy designation is designed to expedite the development and review of drugs in the US that target serious or life-threatening conditions. Drugs qualifying for this designation must show preliminary clinical evidence that the drug may demonstrate a substantial improvement on clinically significant endpoints over available therapies.
"The Breakthrough Therapy designation highlights efanesoctocog alfa's potential to transform treatment for people with haemophilia A by providing higher protection for longer duration," said John Reed, MD, PhD, Global Head of Research and Development at
"This designation supports the innovation of efanesoctocog alfa and acknowledges its potential to fulfil an unmet medical need for people living with haemophilia A," said
Topline results from the pivotal XTEND-1 phase 3 study demonstrated that efanesoctocog alfa met the primary endpoint, showing a clinically meaningful prevention of bleeds in people with severe haemophilia A over a 52-week period. Importantly, the key secondary endpoint was also met, demonstrating that efanesoctocog alfa was superior to prior prophylactic factor VIII replacement therapy in preventing bleeding events based on an intra-patient comparison. Efanesoctocog alfa was well-tolerated, and inhibitor development to factor VIII was not detected. The most common treatment-emergent adverse events (>5 per cent of participants overall) were headache, arthralgia, fall, and back pain.
Data from the XTEND-1 phase 3 study are expected to be shared at an upcoming medical meeting and will serve as the basis for regulatory submission to the FDA by mid-year 2022. The FDA granted efanesoctocog alfa Orphan Drug designation in
Haemophilia A occurs in about one in 5,000 male births annually, and more rarely in females. It is a lifelong condition in which the ability of a person's blood to clot is impaired due to a coagulation factor deficiency. People with haemophilia can experience bleeding episodes that can cause pain, irreversible joint damage, and life-threatening haemorrhages. Unmet medical needs remain for people with haemophilia to strengthen protection, reduce treatment burden and improve quality of life.
About efanesoctocog alfa (BIVV001)
Efanesoctocog alfa is a novel and investigational recombinant factor VIII (FVIII) therapy that is designed to extend protection from bleeds with once-weekly prophylactic dosing for people with haemophilia A. It builds on the innovative Fc fusion technology by adding a region of von Willebrand factor and XTEN® polypeptides to extend its time in circulation. It is the first investigational FVIII therapy that has been shown to break through the von Willebrand factor ceiling, which imposes a half-life limitation on current FVIII therapies. Efanesoctocog alfa is currently under clinical investigation and its safety and efficacy have not been evaluated by any regulatory authority.
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