Biogen Idec and Swedish Orphan Biovitrum today announced that they plan to advance the companies' long-lasting, fully-recombinant factor VIII Fc fusion protein (rFVIIIFc) into a registrational clinical trial in people with hemophilia A. The decision to advance the program is based on promising data from a Phase 1/2a open-label, cross-over, multi-center, dose-escalation study that evaluated the safety and pharmacokinetics of an intravenous injection of rFVIIIFc in 16 previously-treated career with severe hemophilia A.

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