Additional Relevant Details
Last week, BioMarin announced that it had dosed the first participant in the global Phearless Phase 1/2 study with BMN 307, an AAV5-phenylalanine hydroxylase (PAH) gene therapy designed to normalize blood phenylalanine (Phe) concentration levels in patients with PKU by inserting a correct copy of the PAH gene into liver cells. BMN 307 will be evaluated to determine safety and whether a single dose of treatment can restore natural Phe metabolism, increase plasma Phe levels, and enable a normalization of diet in patients with PKU. BioMarin is conducting this study with material manufactured with a commercial-ready process to facilitate rapid clinical development and potentially support approval. BMN 307 represents a potential third PKU treatment option in BioMarin's PKU franchise and a second gene therapy development program.BioMarin's clinical program is composed of two key studies. Phearless, a Phase 1/2 study, will evaluate the safety, efficacy, and tolerability of a single intravenous administration of BMN 307 in patients with PKU. The study consists of a dose-escalation phase, followed by a cohort expansion phase once an initially efficacious dose has been demonstrated. In addition, BioMarin is sponsoring an observational study, Phenom, which includes patients with PKU to measure both established and new markers of disease and clinical outcomes over time.