Onasemnogene abeparvovec for presymptomatic infants with three copies of SMN2 at risk for spinal muscular atrophy: the Phase III SPR1NT trial.

Kevin A Strauss, Michelle A Farrar, Francesco Muntoni, Kayoko Saito, Jerry R Mendell, Laurent Servais, Hugh J McMillan, Richard S Finkel, Kathryn J Swoboda, Jennifer M Kwon, Craig M Zaidman, Claudia A Chiriboga, Susan T Iannaccone, Jena M Krueger, Julie A Parsons, Perry B Shieh, Sarah Kavanagh, Melissa Wigderson, Sitra Tauscher-Wisniewski, Bryan E McGill, Thomas A Macek

Journal: Nature medicine 2023;28(7):1390-1397

PMID: 35715567

Abstract

Most children with biallelic SMN1 deletions and three SMN2 copies develop spinal muscular atrophy (SMA) type 2. SPR1NT ( NCT03505099 ), a Phase III, multicenter, single-arm trial, investigated the efficacy and safety of onasemnogene abeparvovec for presymptomatic children with biallelic SMN1 mutations treated within six postnatal weeks. Of 15 children with three SMN2 copies treated before symptom onset, all stood independently before 24 months (P < 0.0001; 14 within normal developmental window), and 14 walked independently (P < 0.0001; 11 within normal developmental window). All survived without permanent ventilation at 14 months; ten (67%) maintained body weight (≥3rd WHO percentile) without feeding support through 24 months; and none required nutritional or respiratory support. No serious adverse events were considered treatment-related by the investigator. Onasemnogene abeparvovec was effective and well-tolerated for presymptomatic infants at risk of SMA type 2, underscoring the urgency of early identification and intervention.

© 2022. The Author(s).

Address: Clinic for Special Children, Strasburg, PA, USA. [email protected].; Penn Medicine-Lancaster General Hospital, Lancaster, PA, USA. [email protected].; Departments of Pediatrics and Molecular, Cell & Cancer Biology, University of Massachusetts School of Medicine, Worcester, MA, USA. [email protected].; Department of Neurology, Sydney Children's Hospital Network, Sydney, NSW, Australia.; School of Clinical Medicine, UNSW Medicine and Health, UNSW Sydney, Sydney, NSW, Australia.; The Dubowitz Neuromuscular Centre, University College London, Great Ormond Street Institute of Child Health & Great Ormond Street Hospital, London, UK.; National Institute of Health Research, Great Ormond Street Hospital Biomedical Research Centre, London, UK.; Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan.; Center for Gene Therapy, Nationwide Children's Hospital, Columbus, OH, USA.; Department of Pediatrics and Department of Neurology, The Ohio State University, Columbus, OH, USA.; Department of Paediatrics, MDUK Oxford Neuromuscular Centre, Oxford, UK.; Neuromuscular Reference Center, Department of Pediatrics, CHU & University of Liège, Liège, Belgium.; Department of Pediatrics, Neurology & Neurosurgery, Montreal Children's Hospital, McGill University, Montreal, QC, Canada.; Department of Pediatrics, Nemours Children's Hospital, Orlando, FL, USA.; Center for Experimental Neurotherapeutics, St. Jude Children's Research Hospital, Memphis, TN, USA.; Department of Neurology, Massachusetts General Hospital, Boston, MA, USA.; Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.; Washington University School of Medicine, St. Louis, MO, USA.; Division of Pediatric Neurology, Columbia University Medical Center, New York, NY, USA.; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA.; Department of Neurology, Helen DeVos Children's Hospital, Grand Rapids, MI, USA.; Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA.; Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.; Novartis Gene Therapies, Inc., Bannockburn, IL, USA.; Translational Medicine, Novartis Institutes for BioMedical Research, Cambridge, MA, USA.
Bant logo

© Copyright 2026, Nutrition Evidence

NED wishes to thank the following organisations for their support:

We use cookies to improve your experience and analyze site traffic with Google Analytics. By continuing to use our site, you agree to our use of cookies. Learn more.