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15.33 AVXS-101 in presymptomatic spinal muscular atrophy (SMA)
- Source :
- Journal of Neurology, Neurosurgery, & Psychiatry (JNNP); 2019, Vol. 90 Issue: 12 pe7-e7, 1p
- Publication Year :
- 2019
-
Abstract
- BackgroundOnasemnogene abeparvovec (AVXS-101) is a gene-replacement therapy that treats the genetic root cause of SMA, biallelic survival motor neuron 1 gene (SMN1) deletion/mutation. In a phase 1 study, AVXS-101 improved survival and motor function of symptomatic SMA type 1 patients. In SPR1NT (NCT03505099), AVXS-101 is being evaluated in presymptomatic newborns with SMA.MethodsSPR1NT is a multicenter, open-label, phase 3 study enrolling ≥27 SMA patients with 2xSMN2or 3xSMN2. Asymptomatic infants aged ≤6 weeks receive a one-time, intravenous AVXS-101 infusion. Safety and efficacy are assessed through 18 or 24 months for patients with 2x or 3xSMN2, respectively. Primary outcomes are independent sitting ≥30 seconds (2xSMN2) or assisted standing (3xSMN2).ResultsAs of 8 March 2019, 18 infants aged 8–40 days received AVXS-101 (11 female; 8 with 2xSMN2; 9 with 3xSMN2; 1 with 4xSMN2). Among patients with 2xSMN2, mean CHOP-INTEND at baseline was 44.0 points, which increased by 14.4 points at 3 months (n=7); 6/8 patients scored ≥60 points; 3/8 reached maximum score. 4/8 patients sat unassisted; all ages of sitting milestone achievements were within the WHO range (1st–99th percentile: 3.8–9.2 months).ConclusionsPreliminary data from SPR1NT show rapid motor function improvements in presymptomatic SMA patients.
Details
- Language :
- English
- ISSN :
- 00223050 and 1468330X
- Volume :
- 90
- Issue :
- 12
- Database :
- Supplemental Index
- Journal :
- Journal of Neurology, Neurosurgery, & Psychiatry (JNNP)
- Publication Type :
- Periodical
- Accession number :
- ejs51559579
- Full Text :
- https://doi.org/10.1136/jnnp-2019-ABN-2.20