New Data for Nusinersen Underscore Biogen's Commitment to Advancing Clinical Research to Improve Outcomes in SMA

Core Insights - Biogen announced new data reinforcing the clinical impact of nusinersen for spinal muscular atrophy (SMA), highlighting findings from the DEVOTE trial and NURTURE trial presented at a recent conference [1][6][8] - The higher dose regimen of nusinersen is under review in multiple global markets, featuring a rapid loading and higher maintenance dosing schedule [1][5] DEVOTE Trial Findings - Part C of the DEVOTE trial demonstrated potential clinical benefits of a higher dose of nusinersen in previously treated patients (n=38) aged 4 to 65, with a median treatment duration of approximately 3.9 years [3][4] - Improvements were observed in motor function across various assessments, with non-ambulatory participants showing an average improvement of +2.5 on the Hammersmith Functional Motor Scale – Expanded (HFMSE) [4][5] NURTURE Study Outcomes - Final data from the NURTURE study indicated that all 25 participants remained alive, with no need for permanent ventilation, and 92% achieved independent walking ability [6][7][8] - Participants with elevated neurofilament light chain (NfL) levels at baseline showed significant reductions in NfL after starting nusinersen, suggesting its potential as a biomarker for treatment response [9] Safety Profile - The safety profile of the higher dose regimen aligns with the known safety profile of the 12 mg SPINRAZA, with most adverse events reported as mild to moderate [5][9] - In the DEVOTE study, 37 out of 40 participants reported adverse events, with serious adverse events occurring in 15% of participants, none related to the treatment [5]