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Abstract Details

Onasemnogene Abeparvovec Gene Therapy in Presymptomatic Spinal Muscular Atrophy (SMA): SPR1NT Study Update in Children with 2 Copies of SMN2
Child Neurology and Developmental Neurology
Child Neurology and Developmental Neurology Posters (7:00 AM-5:00 PM)
059
Evaluate the safety/efficacy of onasemnogene abeparvovec (formerly AVXS-101) in presymptomatic SMA patients with 2 copies of the survival motor neuron 2 gene (SMN2).
SMA causes loss of motor/respiratory function due to SMN1 deletion/mutation. Copies of SMN2 modify disease severity. Approximately 97% of patients born with 2 copies of SMN2 develop infantile-onset SMA type 1. If untreated, median survival is 13.6 months and patients do not sit without support.

SPR1NT (NCT03505099) is an ongoing multicenter, open-label, Phase III study. Asymptomatic patients expected to develop SMA (Cohort 1: 2SMN2, ≤6 weeks) received a one-time intravenous infusion and are assessed through 18 months. Primary outcomes: sitting for ≥30 seconds. Secondary outcomes: survival and independent feeding with normal weight. Exploratory outcome: motor function improvement (CHOP INTEND). Safety outcomes: incidence of adverse events (AEs)/serious AEs.
As of 11 June 2020, 14 patients in Cohort 1 (2SMN2) were enrolled (enrollment complete). Median age (range) at last visit (months): 15.60 (8.8–18.8); median follow-up time (range) at last visit (months): 14.85 (8.0–18.4). All patients are alive and did not use ventilatory or feeding tube support as of last visit. 11 patients had achieved the primary endpoint of sitting without support for ≥30 seconds; 10/11 were within the normal development window (9.2 months, De Onis 2006) and similar to non-SMA, typically-developing peers; all achieved CHOP INTEND scores of ≥50. Within the whole SPR1NT study population, 30/30 patients (14 2SMN2, 15 3SMN2, and 1 4SMN2 patient included only in the safety population) experienced ≥1 AE; 17/30 experienced treatment-related AEs. 7/13 experienced a serious AE, but all resolved and were considered unrelated to treatment.

78% of patients in this cohort achieved the primary endpoint, at an age similar to non-SMA typically developing children, and children with some delay, demonstrating a significant therapeutic benefit.
Authors/Disclosures
Kevin Strauss
PRESENTER 		Kevin Strauss has received personal compensation in the range of $500-$4,999 for serving as a Consultant for AveXis.
Francesco Muntoni, MD (UCL Institute of Child Health) Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Sarepta. Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Pfizer. Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Sarepta. Dr. Muntoni has received personal compensation in the range of $0-$499 for serving on a Speakers Bureau for Biogen. Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Novartis. Dr. Muntoni has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. The institution of Dr. Muntoni has received research support from European Commission. The institution of Dr. Muntoni has received research support from Medical Research Council. The institution of Dr. Muntoni has received research support from Biogen. The institution of Dr. Muntoni has received research support from Muscular Dystrophy UK. The institution of Dr. Muntoni has received research support from MDA USA. The institution of Dr. Muntoni has received research support from Sarepta. The institution of Dr. Muntoni has received research support from Association Francoise Myopathies. Dr. Muntoni has received personal compensation in the range of $0-$499 for serving as a Clinical expert with UK NICE Committee.
Michelle A. Farrar Michelle A. Farrar has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Biogen. Michelle A. Farrar has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. Michelle A. Farrar has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Novartis. Michelle A. Farrar has received personal compensation in the range of $5,000-$9,999 for serving on a Speakers Bureau for Biogen. Michelle A. Farrar has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche.
Kayoko Saito No disclosure on file
Jerry R. Mendell, MD, FÂ鶹´«Ã½Ó³»­ (The Research Institute at Nationwide Children's Hospital) Dr. Mendell has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Vertex. Dr. Mendell has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Novartis. Dr. Mendell has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Sarepta Therapeutics . The institution of Dr. Mendell has received research support from Sarepta.
Laurent Servais (John Radcliffe Hospital) Laurent Servais has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Biogen. Laurent Servais has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Roche. Laurent Servais has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Novartis. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Astellas. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Pfizer. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Sarepta. The institution of Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Evox. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for PTC. Laurent Servais has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Sysnav. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for BioHaven. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Dyne. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Zentech. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving as a Consultant for MitoRx. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Lupin. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Fibrogen. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Alltrana. Laurent Servais has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Illumina. Laurent Servais has received personal compensation in the range of $10,000-$49,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. The institution of Laurent Servais has received research support from Roche. The institution of Laurent Servais has received research support from Novartis. The institution of Laurent Servais has received research support from Biogen. The institution of Laurent Servais has received research support from Zentech. The institution of Laurent Servais has received research support from BioHaven. The institution of Laurent Servais has received research support from PerkinHalmers. The institution of Laurent Servais has received research support from Scholar Rock.
Hugh J. McMillan, MD (Children's Hospital of Eastern Ontario) Dr. McMillan has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Novartis Gene Therapies. Dr. McMillan has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Novartis Gene Therapies. The institution of Dr. McMillan has received research support from Roche.
Kathryn J. Swoboda, MD Dr. Swoboda has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Biogen. Dr. Swoboda has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Biogen. The institution of Dr. Swoboda has received research support from Biogen.
Jennifer M. Kwon, MD, FÂ鶹´«Ã½Ó³»­ (University of Wisconsin) Dr. Kwon has nothing to disclose.
Craig M. Zaidman, MD (Washington University in St Louis) Dr. Zaidman has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for sarepta. The institution of Dr. Zaidman has received research support from Washington University in St Louis. The institution of Dr. Zaidman has received research support from Novartis.
Claudia A. Chiriboga, MD, FÂ鶹´«Ã½Ó³»­ (Columbia University) Dr. Chiriboga has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Genentec. Dr. Chiriboga has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. The institution of Dr. Chiriboga has received research support from Roche. The institution of Dr. Chiriboga has received research support from Avexis/Novartis. The institution of Dr. Chiriboga has received research support from Biogen. The institution of Dr. Chiriboga has received research support from NIH. The institution of Dr. Chiriboga has received research support from Biohaven. The institution of Dr. Chiriboga has received research support from Genentec. Dr. Chiriboga has received publishing royalties from a publication relating to health care.
Susan T. Iannaccone, MD, FÂ鶹´«Ã½Ó³»­ (Department of Pediatrics) Dr. Iannaccone has received personal compensation in the range of $500-$4,999 for serving as a Consultant for AveXis. Dr. Iannaccone has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Biogen. Dr. Iannaccone has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Sarepta. Dr. Iannaccone has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for AveXis. Dr. Iannaccone has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sarepta. Dr. Iannaccone has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Catabasis. The institution of Dr. Iannaccone has received research support from AveXis. The institution of Dr. Iannaccone has received research support from Biogen. The institution of Dr. Iannaccone has received research support from Sarepta. The institution of Dr. Iannaccone has received research support from PTC Therapeutics. The institution of Dr. Iannaccone has received research support from FibroGen. The institution of Dr. Iannaccone has received research support from ReveraGen. The institution of Dr. Iannaccone has received research support from MDA. The institution of Dr. Iannaccone has received research support from PPMD. The institution of Dr. Iannaccone has received research support from NIH. Dr. Iannaccone has received personal compensation in the range of $0-$499 for serving as a grant reviewer with NIH.
Jena M. Krueger, MD (Helen DeVos Children's Hospital, Spectrum Health) Dr. Krueger has nothing to disclose.
Julie A. Parsons, MD Dr. Parsons has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Biogen. Dr. Parsons has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Pfizer. Dr. Parsons has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sanofi. Dr. Parsons has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Ultragenex. The institution of Dr. Parsons has received research support from AveXis. The institution of Dr. Parsons has received research support from Biogen. The institution of Dr. Parsons has received research support from Scholar Rock. The institution of Dr. Parsons has received research support from Biohaven. The institution of Dr. Parsons has received research support from PTC Therapeutics. The institution of Dr. Parsons has received research support from Novartis.
Perry Shieh, MD, PhD, FÂ鶹´«Ã½Ó³»­ (UCLA) Dr. Shieh has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Sarepta. Dr. Shieh has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Genentech. Dr. Shieh has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Biogen. Dr. Shieh has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Alexion. Dr. Shieh has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Argenx. Dr. Shieh has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for UCB. Dr. Shieh has received personal compensation in the range of $5,000-$9,999 for serving on a Speakers Bureau for CSL Behring. Dr. Shieh has received personal compensation in the range of $5,000-$9,999 for serving on a Speakers Bureau for Grifols. Dr. Shieh has received personal compensation in the range of $5,000-$9,999 for serving on a Speakers Bureau for Alexion. Dr. Shieh has received personal compensation in the range of $50,000-$99,999 for serving on a Speakers Bureau for Biogen. Dr. Shieh has received personal compensation in the range of $10,000-$49,999 for serving on a Speakers Bureau for Genentech. Dr. Shieh has received personal compensation in the range of $5,000-$9,999 for serving on a Speakers Bureau for Argenx. Dr. Shieh has received personal compensation in the range of $10,000-$49,999 for serving on a Speakers Bureau for Catalyst.
No disclosure on file
No disclosure on file
Sitra Tauscher-Wisniewski Sitra Tauscher-Wisniewski has received personal compensation for serving as an employee of Novartis Gene Therapies.
No disclosure on file