Core Viewpoint - PTC Therapeutics has received marketing authorization from the European Commission for Sephience™ (sepiapterin) to treat phenylketonuria (PKU) in patients of all ages and disease severities, marking a significant advancement in treatment options for this rare metabolic disorder [1][2][3] Group 1: Product Information - Sephience™ (sepiapterin) is indicated for the treatment of hyperphenylalaninaemia (HPA) in both adult and pediatric patients with PKU, acting as a natural precursor of the enzymatic co-factor BH4, which is essential for the enzyme phenylalanine hydroxylase (PAH) [4] - The product functions as a dual pharmacological chaperone, improving the activity of defective PAH enzymes and effectively reducing blood phenylalanine (Phe) levels [4] - The European launch of Sephience will begin in Germany in the first half of July 2025, with ongoing review for approval in other countries including Japan and Brazil [3] Group 2: Clinical Evidence - The European approval is based on statistically significant results from the Phase 3 APHENITY trial, demonstrating a durable treatment effect and allowing participants to liberalize their diet in the long-term extension study [2] Group 3: Company Overview - PTC Therapeutics is a global biopharmaceutical company focused on developing and commercializing medicines for rare disorders, leveraging scientific expertise and a global commercial infrastructure to maximize value for patients [6] - The company aims to provide access to best-in-class treatments for patients with unmet medical needs, supported by a robust and diversified pipeline of transformative medicines [6]