首页> 外文期刊>The Canadian Journal of Neurological Sciences: le Journal Canadien des Sciences Neurologiques >P.065 AVXS-101 gene-replacement therapy (GRT)) in presymptomatic spinal muscular atrophy (SMA): study update
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P.065 AVXS-101 gene-replacement therapy (GRT)) in presymptomatic spinal muscular atrophy (SMA): study update

机译:P.065 AVXS-101基因替代疗法(GRT))在假设脊柱肌萎缩(SMA)中:研究更新

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Background: SMA is a neurodegenerative disease caused by biallelic deletion/mutation of SMN1. Copies of a similar gene (SMN2) modify disease severity. In a phase 1 study, SMN GRT onasemnogene abeparvovec (AVXS-101) improved outcomes of symptomatic SMA patients with two SMN2 copies (2xSMN2) dosed ≤6 months. Because motor neuron loss can be insidious and disease progression is rapid, early intervention is critical. This study evaluates AVXS-101 in presymptomatic SMA newborns. Methods: SPR1NT is a multicenter, open-label, phase 3 study enrolling ≥27 SMA patients with 2–3xSMN2. Asymptomatic infants ≤6 weeks receive a one-time intravenous AVXS-101 infusion (1.1x1014 vg/kg). Safety and efficacy are assessed through study end (18 [2xSMN2] or 24 months [3xSMN2]). Primary outcomes: independent sitting for ≥30 seconds (18 months [2xSMN2]) or assisted standing (24 months [3xSMN2]). Results: From April–September 2018, 7 infants received AVXS-101 (4 female; 6 with 2xSMN2) at ages 8–37 days. Mean baseline CHOP-INTEND score was 41.7 (n=6), which increased by 6.8, 11.0, 18.0, and 22.5 points at day 14 (n=4), month 1 (n=3), 2 (n=3), and 3 (n=2). Updated data available at the time of the congress will be presented. Conclusions: Preliminary data from SPR1NT show rapid motor function improvements in presymptomatic SMA patients.
机译:背景:SMA是由SMN1的双倍裂解/突变引起的神经变性疾病。类似基因(SMN2)修饰疾病严重程度的副本。在1期研究中,SMN GRT OnAsmaNogene AbepeRVOVEC(AVXS-101)改善了症状SMA患者的两种SMN2拷贝(2xSMN2)的结果≤6个月。由于电机神经元损失可能是阴险无缺的,并且疾病进展是快速的,早期干预是至关重要的。本研究评估了在假设SMA新生儿中的AVXS-101。方法:SPR1NT是一种多中心,开放标签,第3期≥27患者2-3xSMN2的≥27患者。无症状婴儿≤6周接受一次性静脉内AVXS-101输注(1.1×1014 Vg / kg)。通过研究结束评估安全性和功效(18 [2xsmn2]或24个月[3xsmn2])。主要结果:独立坐姿≥30秒(18个月[2xsmn2])或辅助站立(24个月[3xsmn2])。结果:2018年4月至9月,7名婴儿收到了8-37天的AVXS-101(4名女性; 6岁)。平均基线斩波打印分数为41.7(n = 6),在第14天(n = 4),月1(n = 3),2(n = 3),和3(n = 2)。将介绍会议时代的更新数据。结论:SPR1NT的初步数据显示了假设SMA患者的快速运动功能。

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