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<p>STEER (<a href="http://clinicaltrials.gov/study/NCT05089656">NCT05089656</a>) was a 52-week, phase 3, multicenter, randomized, sham-controlled, double-blind trial evaluating intrathecal onasemnogene abeparvovec (OAV101 IT), a one-time gene transfer therapy, in patients with spinal muscular atrophy (SMA). Participants ranged in age from 2 years to &lt;18 years, were treatment-naive and were able to sit but never walked independently. Primary efficacy endpoint was change from baseline in Hammersmith Functional Motor Scale-Expanded (HFMSE) score. In total, 126 patients received OAV101 IT (<i>n</i> = 75) or a sham procedure (<i>n</i> = 51). The primary endpoint was met: patients treated with OAV101 IT demonstrated a significant increase in HFMSE score compared with sham (least squares mean difference, 1.88 (95% confidence interval: 0.51−3.25); <i>P</i> = 0.0074). Overall incidence of adverse events (AEs), serious adverse events (SAEs) and adverse events of special interest (AESI) was similar between groups. Transaminase increases were infrequent; most were low grade and transient. Two participants in the OAV101 IT arm and one participant in the sham arm developed sensory symptoms. One-time OAV101 IT demonstrated a statistically significant improvement in motor function compared with sham control. The overall safety findings were acceptable, with similar incidences of AEs, SAEs and AESI in the OAV101 IT and sham groups. Trial registration: ClinicalTrials.gov identifier: <a href="https://clinicaltrials.gov/ct2/show/NCT05089656">NCT05089656</a>.</p>

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Intrathecal onasemnogene abeparvovec in treatment-naive patients with spinal muscular atrophy: a phase 3, randomized controlled trial

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月8日

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  • Crystal M. Proud,
  • Dũng Chí Vũ,
  • Jo M. Wilmshurst,
  • Oranee Sanmaneechai,
  • Sheffali Gulati,
  • Hui Xiong,
  • Hugo C. Moreno,
  • Stacey Kiat Hong Tay,
  • Meow-Keong Thong,
  • Alfred Peter Born,
  • Adriana Banzzatto Ortega,
  • Yuh-Jyh Jong,
  • Mohammad A. Al-Muhaizea,
  • Anna W. Lee,
  • Jeannie Visootsak,
  • Sitra Tauscher-Wisniewski,
  • Iulian Alecu,
  • Rutvick Parlikar,
  • Richard S. Finkel,
  • Dũng Chí Vũ,
  • Meow-Keong Thong,
  • Adriana Banzzatto Ortega,
  • Yuh-Jyh Jong

摘要

STEER (NCT05089656) was a 52-week, phase 3, multicenter, randomized, sham-controlled, double-blind trial evaluating intrathecal onasemnogene abeparvovec (OAV101 IT), a one-time gene transfer therapy, in patients with spinal muscular atrophy (SMA). Participants ranged in age from 2 years to <18 years, were treatment-naive and were able to sit but never walked independently. Primary efficacy endpoint was change from baseline in Hammersmith Functional Motor Scale-Expanded (HFMSE) score. In total, 126 patients received OAV101 IT (n = 75) or a sham procedure (n = 51). The primary endpoint was met: patients treated with OAV101 IT demonstrated a significant increase in HFMSE score compared with sham (least squares mean difference, 1.88 (95% confidence interval: 0.51−3.25); P = 0.0074). Overall incidence of adverse events (AEs), serious adverse events (SAEs) and adverse events of special interest (AESI) was similar between groups. Transaminase increases were infrequent; most were low grade and transient. Two participants in the OAV101 IT arm and one participant in the sham arm developed sensory symptoms. One-time OAV101 IT demonstrated a statistically significant improvement in motor function compared with sham control. The overall safety findings were acceptable, with similar incidences of AEs, SAEs and AESI in the OAV101 IT and sham groups. Trial registration: ClinicalTrials.gov identifier: NCT05089656.