This is a Phase 1/2, open-label, dose escalation study to evaluate the safety, efficacy and tolerability of BMN 307 in adult PKU subjects with PAH deficiency. Participants will receive a single administration of BMN 307 and will be followed for safety and efficacy.
Phase 1 trials primarily test safety and dosing in a small number of participants (typically 20–100). Results do not yet speak to efficacy. FDA approval is typically many years away from this stage.
Phase 2 trials begin testing efficacy in a larger patient group (100–300). This is often where biotech binary events occur — positive Phase 2 data can significantly advance a company's pipeline narrative, while failures can be terminal for a program.
Enrollment is complete. The trial is in its follow-up or data collection phase — a readout may occur on or near the primary completion date.
BioMarin Pharmaceutical (BMRN) is the sponsoring company for this trial. BiotechSign currently grades this company D (49/100) based on composite catalyst signals across its full pipeline. This trial is one data point in that overall catalyst picture.