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Neurology. 2018 Oct 2;91(14):e1312-e1318. doi: 10.1212/WNL.0000000000006281. Epub 2018 Aug 29.

Nusinersen in patients older than 7 months with spinal muscular atrophy type 1: A cohort study.

Author information

1
From the Institute I-motion (K.A.-G., A.M.S., E.G., M.A., T.G., L.S.), Pediatric Intensive Care Unit (J. Rambaud), and Department of Pediatric Pneumology (J.T.), Armand Trousseau Hospital, Paris, France; Neuromuscular Reference Centre (A.D., L.S.), Citadelle Hospital, Liege, Belgium; Department of Pediatric Physical Medicine and Rehabilitation (C.V.), University Hospital of Lyon; Department of Child Neurology (C.C.), University Hospital of Toulouse; Department of Child Neurology (J. Ropars), University Hospital of Brest; Department of Pediatrics (M.C.), University Hospital of Dijon, France; Department of Neurology & Neurosurgery (I.C.), Brain Center Rudolf Magnus, UMC Utrecht, the Netherlands; Royal Manchester Children's Hospital (I.H.), Manchester; Department of Paediatric Neurology (M.I.) University Hospital Southampton; John Walton Muscular Dystrophy Research Centre (C.M.-B.), Institute of Genetic Medicine, Newcastle University; and Dubowitz Neuromuscular Centre (M.S.), UCL Great Ormond Street Institute of Child Health, London, UK. l.servais@institut-myologie.org.
2
From the Institute I-motion (K.A.-G., A.M.S., E.G., M.A., T.G., L.S.), Pediatric Intensive Care Unit (J. Rambaud), and Department of Pediatric Pneumology (J.T.), Armand Trousseau Hospital, Paris, France; Neuromuscular Reference Centre (A.D., L.S.), Citadelle Hospital, Liege, Belgium; Department of Pediatric Physical Medicine and Rehabilitation (C.V.), University Hospital of Lyon; Department of Child Neurology (C.C.), University Hospital of Toulouse; Department of Child Neurology (J. Ropars), University Hospital of Brest; Department of Pediatrics (M.C.), University Hospital of Dijon, France; Department of Neurology & Neurosurgery (I.C.), Brain Center Rudolf Magnus, UMC Utrecht, the Netherlands; Royal Manchester Children's Hospital (I.H.), Manchester; Department of Paediatric Neurology (M.I.) University Hospital Southampton; John Walton Muscular Dystrophy Research Centre (C.M.-B.), Institute of Genetic Medicine, Newcastle University; and Dubowitz Neuromuscular Centre (M.S.), UCL Great Ormond Street Institute of Child Health, London, UK.

Abstract

OBJECTIVE:

To evaluate the safety and clinical efficacy of nusinersen in patients older than 7 months with spinal muscular atrophy type 1 (SMA1).

METHODS:

Patients with SMA1 were treated with nusinersen by intrathecal injections as a part of the Expanded Access Program (EAP; NCT02865109). We evaluated patients before treatment initiation (M0) and at 2 months (M2) and 6 months (M6) after treatment initiation. Survival, respiratory, and nutritional data were collected. Motor function was assessed with the modified Hammersmith Infant Neurologic Examination Part 2 (HINE-2) and physiotherapist scales adjusted to patient age (Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders and the Motor Function Measure 20 or 32).

RESULTS:

We treated 33 children ranging in age from 8.3 to 113.1 months between December 2016 and May 2017. All patients were alive and were continuing treatment at M6. Median progress on the modified HINE-2 score was 1.5 points after 6 months of treatment (p < 0.001). The need for respiratory support significantly increased over time. There were no statistically significant differences between patients presenting with 2 and those presenting with 3 copies of the survival motor neuron 2 (SMN2) gene.

CONCLUSIONS:

Our results are in line with the phase 3 study for nusinersen in patients with SMA1 treated before 7 months of age and indicate that patients benefit from nusinersen even at a later stage of the disease.

CLINICALTRIALSGOV IDENTIFIER:

NCT02865109.

CLASSIFICATION OF EVIDENCE:

This study provides Class IV evidence that for patients with SMA1 who are older than 7 months, nusinersen is beneficial.

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