uniQure Provides Regulatory Update on AMT-130 for Huntington's Disease

Core Insights - uniQure N.V. is advancing its investigational gene therapy AMT-130 for Huntington's disease, with a Biologics License Application (BLA) submission planned for the first quarter of 2026, following alignment with the FDA on key components of the statistical analysis plan and Chemistry, Manufacturing and Controls (CMC) information [1][2][8] Regulatory Update - The FDA has supported the use of the composite Unified Huntington's Disease Rating Scale (cUHDRS) as an acceptable clinical endpoint for accelerated approval, with the primary efficacy analysis focusing on the 3-year change in cUHDRS in high-dose AMT-130 patients compared to an external control arm [3][4] - The ENROLL-HD dataset, which includes approximately 33,000 patients, will serve as the external control dataset for the primary analysis, enhancing the robustness of the statistical analysis plan due to its larger sample size and lower attrition rates [4][5] Chemistry, Manufacturing and Controls (CMC) - The FDA has agreed that the validation of the AMT-130 manufacturing process can leverage prior knowledge from the HEMGENIX® process, along with additional full-scale AMT-130 GMP batches and a single Process Performance Qualification (PPQ) batch [6][7] Next Steps - The company plans to submit an updated statistical analysis plan to the FDA in Q2 2025, initiate the PPQ run and present topline Phase I/II data in Q3 2025, hold a pre-BLA meeting in Q4 2025, and submit the BLA in Q1 2026 with a request for priority review designation [15] Clinical Program Overview - uniQure is conducting two multi-center, dose-escalating, Phase I/II clinical studies to evaluate the safety and efficacy of AMT-130, with a total of 26 patients in the U.S. study and 13 patients in the European study, exploring both low and high doses [10][11] - AMT-130 has received the FDA's Regenerative Medicine Advanced Therapy (RMAT) designation and Breakthrough Therapy designation, marking it as the first therapy for Huntington's disease to achieve RMAT designation [11] Huntington's Disease Context - Huntington's disease is a rare neurodegenerative disorder affecting approximately 70,000 diagnosed individuals in the U.S. and Europe, with no approved therapies currently available to slow its progression [12] Company Background - uniQure is focused on gene therapy, with a pipeline that includes treatments for Huntington's disease, refractory temporal lobe epilepsy, ALS, and Fabry disease, building on its historic achievement in gene therapy for hemophilia B [13]