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O'Brien K, Nguo K, Yiu EM, Woodcock IR, Billich N, Davidson ZE. Nutrition outcomes of disease modifying therapies in spinal muscular atrophy: A systematic review. Muscle Nerve 2024; 70:890-902. [PMID: 39129236 DOI: 10.1002/mus.28224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 07/17/2024] [Accepted: 07/19/2024] [Indexed: 08/13/2024]
Abstract
The nutritional implications of spinal muscular atrophy (SMA) are profound. Disease modifying therapies (DMT) have improved clinical outcomes. This review describes the impact of DMT on nutrition outcomes. A systematic search strategy was applied across seven databases until May 2023. Eligible studies measured nutrition outcomes in individuals with SMA on DMT (nusinersen, risdiplam or onasemnogene abeparvovec [OA]) compared to untreated comparators. Nutrition outcomes included anthropometry, feeding route, swallowing dysfunction, dietary intake, dietetic intervention, nutritional biochemistry, metabolism, gastrointestinal issues and energy expenditure. Articles retrieved were screened in duplicate, data were extracted and appraised systematically. Sixty three articles from 54 studies were included; 41% (n = 22) investigated nusinersen in pediatric participants with SMA type 1. Anthropometry (n = 18), feeding route (n = 39), and swallowing dysfunction (n = 18) were the most commonly reported outcomes. In combined pediatric and adult cohorts, BMI z-score remained stable post nusinersen therapy. The proportion of children with SMA requiring enteral nutrition was stable post nusinersen therapy. Ability to thrive at age 1.5 years was higher in children treated in early infancy with OA compared to historical controls. Significant heterogeneity existed across study population characteristics and outcome measures. Nusinersen may prevent deterioration in some nutrition outcomes; and OA in early infancy may be associated with improved nutrition outcomes. Timing of DMT initiation is an important consideration for future nutrition research. Studies investigating nutrition as a primary outcome of DMT, using consistent outcome measures are required for nutritional management strategies for this cohort to be appropriately tailored.
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Affiliation(s)
- Katie O'Brien
- Department of Nutrition, Dietetics and Food, Monash University, Faculty of Medicine Nursing and Health Sciences, Melbourne, Australia
- Department of Nutrition and Food Services, Royal Children's Hospital, Melbourne, Australia
| | - Kay Nguo
- Department of Nutrition, Dietetics and Food, Monash University, Faculty of Medicine Nursing and Health Sciences, Melbourne, Australia
| | - Eppie M Yiu
- Department of Neurology, Royal Children's Hospital, Melbourne, Australia
- Neurosciences Research, Murdoch Children's Research Institute, Melbourne, Australia
- Department of Paediatrics, Faculty of Medicine Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
| | - Ian R Woodcock
- Department of Neurology, Royal Children's Hospital, Melbourne, Australia
- Neurosciences Research, Murdoch Children's Research Institute, Melbourne, Australia
- Department of Paediatrics, Faculty of Medicine Dentistry and Health Sciences, University of Melbourne, Melbourne, Australia
| | - Natassja Billich
- Molecular Therapies Research, Murdoch Children's Research Institute, Melbourne, Australia
- The University of Queensland School of Human Movement and Nutrition Sciences, St Lucia, Australia
| | - Zoe E Davidson
- Department of Nutrition, Dietetics and Food, Monash University, Faculty of Medicine Nursing and Health Sciences, Melbourne, Australia
- Department of Neurology, Royal Children's Hospital, Melbourne, Australia
- Neurosciences Research, Murdoch Children's Research Institute, Melbourne, Australia
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2
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Pane M, Stanca G, Coratti G, D' Amico A, Sansone VA, Berti B, Fanelli L, Albamonte E, Ausili Cefaro C, Cerchiari A, Catteruccia M, De Sanctis R, Leone D, Palermo C, Buchignani B, Onesimo R, Kuczynska EM, Tosi M, Pera MC, Bravetti C, Tiziano FD, Bertini E, Mercuri E. Prognostic factors for tube feeding in type I SMA patients treated with disease-modifying therapies: a cohort study. Eur J Pediatr 2024; 183:4735-4745. [PMID: 39210071 DOI: 10.1007/s00431-024-05735-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 08/09/2024] [Accepted: 08/14/2024] [Indexed: 09/04/2024]
Abstract
The aim of this study was to assess the need for tube feeding in a cohort of treated infants with type I SMA and to identify predictive factors. All patients were classified at baseline, when treatment started, and at follow-up according to their functional level and the need for tube feeding. Fisher's exact test was used to examine the associations between the outcome at the last follow-up and SMA type, SMN2 copy number, and baseline nutritional status. ANOVA was performed to compare CHOP INTEND scores and age at treatment initiation with outcomes. The cohort includes 75 type I SMA infants treated between 0.1 and 5 years of age. At the last follow-up, 34 had no need for tube feeding, 9 had tube feeding but were also able to be fed by mouth, and 32 had tube feeding and were unable to be fed by mouth. Thirty of the 41 infants with tube feeding at follow-up already had feeding difficulties when treatment was started. The need for tube feeding at follow-up was associated with the level of feeding involvement at baseline and with CHOP INTEND scores [p < 0.001] but not with SMN2 copy number, SMA type 1 subtypes or age at treatment. The results of this study suggest that the need for tube feeding is not frequent in treated infants with type I SMA and, when occurring, can be predicted by the level of feeding involvement and low CHOP INTEND scores at baseline. What is Known: • The advent of disease-modifying therapies is increasingly changing the approach to swallowing and nutritional management in type I SMA. • Clinical trials and real-world data using all three disease-modifying therapies report a rather wide variability of feeding outcome and need for tube feeding that is often related to different cohorts that makes comparison between studies very difficult. What is New: • The real-world findings of this study, including all the children treated since treatments became available, confirmed that the need for tube feeding is not an invariable finding. • The level of feeding involvement at baseline appears to be a reliable prognostic indicator of bulbar outcome. • The results highlight the need for interventional studies with structured Speech and Language Therapist protocols that will help to better understand the extent to which bulbar function can be maintained or regained even in children requiring tube feeding.
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Affiliation(s)
- Marika Pane
- Pediatric Neurology, Università Cattolica del Sacro Cuore, Rome, Italy
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Giulia Stanca
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Giorgia Coratti
- Pediatric Neurology, Università Cattolica del Sacro Cuore, Rome, Italy
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Adele D' Amico
- Unit of Muscular and Neurodegenerative Disorders, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Valeria Ada Sansone
- The NEMO Center in Milan, Neurorehabilitation Unit, University of Milan, ASST Niguarda Hospital, Milan, Italy
| | - Beatrice Berti
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Lavinia Fanelli
- Pediatric Neurology, Università Cattolica del Sacro Cuore, Rome, Italy
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Emilio Albamonte
- The NEMO Center in Milan, Neurorehabilitation Unit, University of Milan, ASST Niguarda Hospital, Milan, Italy
| | - Carolina Ausili Cefaro
- Speech Language Pathology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Lazio, Italy
| | - Antonella Cerchiari
- Feeding and Swallowing Services Unit, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Michela Catteruccia
- Unit of Muscular and Neurodegenerative Disorders, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Roberto De Sanctis
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Daniela Leone
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Concetta Palermo
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Bianca Buchignani
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa, Italy
| | - Roberta Onesimo
- Center for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Eliza Maria Kuczynska
- Center for Rare Diseases and Birth Defects, Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Michele Tosi
- Unit of Muscular and Neurodegenerative Disorders, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Maria Carmela Pera
- Pediatric Neurology, Università Cattolica del Sacro Cuore, Rome, Italy
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Chiara Bravetti
- Pediatric Neurology, Università Cattolica del Sacro Cuore, Rome, Italy
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Francesco Danilo Tiziano
- Department of Life Sciences and Public Health, Section of Genomic Medicine, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Enrico Bertini
- Unit of Muscular and Neurodegenerative Disorders, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Eugenio Mercuri
- Pediatric Neurology, Università Cattolica del Sacro Cuore, Rome, Italy.
- Centro Clinico Nemo, Neuropsichiatria Infantile, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy.
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Vrellaku B, Sethw Hassan I, Howitt R, Webster CP, Harriss E, McBlane F, Betts C, Schettini J, Lion M, Mindur JE, Duerr M, Shaw PJ, Kirby J, Azzouz M, Servais L. A systematic review of immunosuppressive protocols used in AAV gene therapy for monogenic disorders. Mol Ther 2024; 32:3220-3259. [PMID: 39044426 DOI: 10.1016/j.ymthe.2024.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 05/24/2024] [Accepted: 07/18/2024] [Indexed: 07/25/2024] Open
Abstract
The emergence of adeno-associated virus (AAV)-based gene therapy has brought hope to patients with severe monogenic disorders. However, immune responses to AAV vectors and transgene products present challenges that require effective immunosuppressive strategies. This systematic review focuses on the immunosuppressive protocols used in 38 clinical trials and 35 real-world studies, considering a range of monogenic diseases, AAV serotypes, and administration routes. The review underscores the need for a deeper understanding of immunosuppressive regimens to enhance the safety and effectiveness of AAV-based gene therapy. Characterizing the immunological responses associated with various gene therapy treatments is crucial for optimizing treatment protocols and ensuring the safety and efficacy of forthcoming gene therapy interventions. Further research and understanding of the impact of immunosuppression on disease, therapy, and route of administration will contribute to the development of more effective and safer gene therapy approaches in the future.
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Affiliation(s)
- Besarte Vrellaku
- Department of Paediatrics, MDUK Oxford Neuromuscular Centre & NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Ilda Sethw Hassan
- Sheffield Institute for Translational Neuroscience, Division of Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, UK
| | | | - Christopher P Webster
- Sheffield Institute for Translational Neuroscience, Division of Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, UK
| | - Eli Harriss
- Bodleian Health Care Libraries, University of Oxford, Oxford, UK
| | | | - Corinne Betts
- Department of Paediatrics, MDUK Oxford Neuromuscular Centre & NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Jorge Schettini
- Department of Paediatrics, MDUK Oxford Neuromuscular Centre & NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Mattia Lion
- Takeda Pharmaceuticals USA, Inc, Cambridge, MA, USA
| | | | - Michael Duerr
- Bayer Aktiengesellschaft, CGT&Rare Diseases, Leverkusen, Deutschland
| | - Pamela J Shaw
- Sheffield Institute for Translational Neuroscience, Division of Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, UK
| | - Janine Kirby
- Sheffield Institute for Translational Neuroscience, Division of Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, UK
| | - Mimoun Azzouz
- Sheffield Institute for Translational Neuroscience, Division of Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, UK; Gene Therapy Innovation & Manufacturing Centre (GTIMC), University of Sheffield, Sheffield, UK.
| | - Laurent Servais
- Department of Paediatrics, MDUK Oxford Neuromuscular Centre & NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK; Division of Child Neurology, Department of Paediatrics, Centre de Référence des Maladies Neuromusculaires, University Hospital Liège and University of Liège, Liège, Belgium.
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4
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Xiao L, Amin R. Impact of Disease-modifying Therapies on Respiratory Function in People with Neuromuscular Disorders. Sleep Med Clin 2024; 19:473-483. [PMID: 39095144 DOI: 10.1016/j.jsmc.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Spinal muscular atrophy (SMA) and Duchenne muscular dystrophy (DMD) are neuromuscular disorders that affect muscular function. The most common causes of morbidity and mortality are respiratory complications, including restrictive lung disease, ineffective cough, and sleep-disordered breathing. The paradigm of care is changing as new disease-modifying therapies are altering disease trajectory, outcomes, expectations, as well as patient and caregiver experiences. This article provides an overview on therapeutic advances for SMA and DMD in the last 10 years, with a focus on the effects of disease-modifying therapies on respiratory function.
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Affiliation(s)
- Lena Xiao
- Division of Respiratory Medicine, British Columbia Children's Hospital, 4480 Oak Street, Room 1C31A, Vancouver, British Columbia, V6H 3V4, Canada; University of British Columbia, Vancouver, Canada
| | - Reshma Amin
- Division of Respiratory Medicine, The Hospital for Sick Children, 175 Elizabeth Street, 16-14-026, Patient Support Center, Toronto, ON, M5G2G3, Canada; University of Toronto, Toronto, Canada.
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5
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Cheng X, Li YN, Fan YB, Zhao HH, Li L, Lu C, Zhu LH, Niu Q. Cytokines in cerebrospinal fluid as a prognostic predictor after treatment of nusinersen in SMA patients. Clin Neurol Neurosurg 2024; 244:108462. [PMID: 39047390 DOI: 10.1016/j.clineuro.2024.108462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 06/30/2024] [Accepted: 07/17/2024] [Indexed: 07/27/2024]
Abstract
OBJECTIVES Recent studies have suggested that neuroinflammation may play a role in the progression of spinal muscular atrophy (SMA), and this may influence the efficacy of antisense oligonucleotide treatment. This study explored the biomarkers associated with SMA and the efficacy of nusinersen therapy. METHODS Fifteen patients with SMA were enrolled and their motor function (World Health Organization motor milestone, Hammersmith Functional Motor Scale Expanded (HFMSE), and Revised Upper Limb Module [RULM] scores, and 6-minute walking test) was evaluated before, during (63 days), and after (6 months) nusinersen treatment. The concentrations of monocyte chemoactive protein 1 (MCP1), tumour necrosis factor-alpha (TNF-α), and interleukin (IL)-10 in the cerebrospinal fluid were measured at the indicated time points, and their correlations with motor function were analysed. RESULTS A significant increase in MCP1 was observed after 6 month's treatment compared with that before treatment, while TNF-α gradually decreased over the course of treatment. IL-10 levels were negatively correlated with HFMSE scores before treatment, and reductions in IL-10 levels were correlated with improvements in RULM scores. CONCLUSIONS This study suggests that neuroinflammation may be associated with the severity of SMA and with the therapeutic effects of nusinersen, which could have clinical implications in the treatment of SMA.
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Affiliation(s)
- Xi Cheng
- Department of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Ya-Nan Li
- Department of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Ya-Bei Fan
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Hui-Hui Zhao
- Department of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Ling Li
- Center of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Chao Lu
- Center of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Liang-Hua Zhu
- Center of Rehabilitation Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, China.
| | - Qi Niu
- Department of Geriatrics, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, Jiangsu 210029, China.
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6
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McPheron MA, Felker MV. Clinical perspectives: Treating spinal muscular atrophy. Mol Ther 2024; 32:2489-2504. [PMID: 38894541 PMCID: PMC11405177 DOI: 10.1016/j.ymthe.2024.06.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 04/26/2024] [Accepted: 06/14/2024] [Indexed: 06/21/2024] Open
Abstract
Spinal muscular atrophy is a rare and progressive neuromuscular disease that, without treatment, leads to progressive weakness and often death. A plethora of studies have led to the approval of three high-cost and effective treatments since 2016. These treatments, nusinersen, onasemnogene abeparvovec, and risdiplam, have not been directly compared and have varying challenges in administration. In this review, we discuss the evidence supporting the use of these medications, the process of treatment selection, monitoring after treatment, the limited data comparing treatments, as well as future directions for investigation and therapy.
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Affiliation(s)
- Molly A McPheron
- Department of Medical and Molecular Genetics, Indiana University, Indianapolis, IN 46202, USA
| | - Marcia V Felker
- Department of Neurology, Indiana University, Indianapolis, IN 46202, USA.
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7
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Ramdas S, Oskoui M, Servais L. Treatment Options in Spinal Muscular Atrophy: A Pragmatic Approach for Clinicians. Drugs 2024; 84:747-762. [PMID: 38878146 DOI: 10.1007/s40265-024-02051-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/19/2024] [Indexed: 07/31/2024]
Abstract
Spinal muscular atrophy (SMA) is a rare neurodegenerative neuromuscular disorder with a wide phenotypic spectrum of severity. SMA was previously life limiting for patients with the most severe phenotype and resulted in progressive disability for those with less severe phenotypes. This has changed dramatically in the past few years with the approvals of three disease-modifying treatments. We review the evidence supporting the use of currently approved SMA treatments (nusinersen, onasemnogene abeparvovec, and risdiplam), focusing on mechanisms of action, side effect profiles, published clinical trial data, health economics, and pending questions. Whilst there is robust data from clinical trials of efficacy and side effect profile for individual drugs in select SMA populations, there are no comparative head-to-head clinical trials. This presents a challenge for clinicians who need to make recommendations on the best treatment option for an individual patient and we hope to provide a pragmatic approach for clinicians across each SMA profile based on current evidence.
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Affiliation(s)
- Sithara Ramdas
- Department of Paediatrics, MDUK Oxford Neuromuscular Centre and NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
- Department of Paediatric Neurology, John Radcliffe Hospital, Oxford, UK
| | - Maryam Oskoui
- Departments of Pediatrics and Neurology and Neurosurgery, McGill University, Montreal, Canada
- Centre for Outcomes Research and Evaluation, Research Institute of the McGill University Health Centre, Montreal, Canada
| | - Laurent Servais
- Department of Paediatrics, MDUK Oxford Neuromuscular Centre and NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK.
- Division of Child Neurology, Department of Pediatrics, Centre de Référence des Maladies Neuromusculaires, University Hospital Liège and University of Liège, Liège, Belgium.
- Academic Paediatric Department, Level 2 Children Hospital-John Radcliffe Hospital, Headley Way, Headington, Oxford, OX3 9DU, UK.
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8
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Mendonça RH, Ortega AB, Matsui C, van der Linden V, Kerstenetzky M, Grossklauss LF, Silveira-Lucas EL, Polido GJ, Zanoteli E. Gene replacement therapy for spinal muscular atrophy: safety and preliminary efficacy in a Brazilian cohort. Gene Ther 2024; 31:391-399. [PMID: 38839888 DOI: 10.1038/s41434-024-00456-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/30/2024] [Accepted: 05/09/2024] [Indexed: 06/07/2024]
Abstract
Spinal muscular atrophy (SMA) is a motor neuron disease associated with progressive muscle weakness, ventilatory failure, and reduced survival. Onasemnogene abeparvovec is the first gene replacement therapy (GT) approved to treat this condition. An observational retrospective study was conducted to assess adverse events and efficacy of GT in SMA patients. Forty-one patients with SMA (58.5% females and 80.1% SMA type 1) were included. The mean age at GT dosing was 18 (±6.4) months. Thirty-six patients (87.8%) were under previous treatment with nusinersen, and 10 (24.4%) continued nusinersen after GT. Mean CHOP-INTEND increased 13 points after 6 months and this finding did not differ between groups according to nusinersen maintenance after GT (p = 0.949). Among SMA type 1 patients, 14 (46.6%) reached the ability to sit alone. Liver transaminases elevation at least two times higher than the upper limit of normal value occurred in 29 (70.7%) patients. Thrombocytopenia occurred in 13 (31.7%) patients, and one presented thrombotic microangiopathy. Older age (>2 years) was associated with more prolonged use of corticosteroids (p = 0.021). GT is effective in SMA patients, combined nusinersen after GT did not appear to add gain in motor function and older age is associated with prolonged corticosteroid use.
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Affiliation(s)
- Rodrigo Holanda Mendonça
- Department of Neurology, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil.
- Hospital Samaritano Higienópolis, São Paulo, Brazil.
| | | | - Ciro Matsui
- Department of Neurology, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
- Hospital Samaritano Higienópolis, São Paulo, Brazil
| | | | | | | | | | - Graziela Jorge Polido
- Department of Neurology, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
| | - Edmar Zanoteli
- Department of Neurology, Faculdade de Medicina, Universidade de São Paulo (FMUSP), São Paulo, Brazil
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9
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Abati E, Mauri E, Rimoldi M, Madini B, Patria F, Comi GP, Corti S. Sleep and sleep-related breathing disorders in patients with spinal muscular atrophy: a changing perspective from novel treatments? Front Neurol 2024; 15:1299205. [PMID: 38895692 PMCID: PMC11184139 DOI: 10.3389/fneur.2024.1299205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 05/07/2024] [Indexed: 06/21/2024] Open
Abstract
Spinal Muscular Atrophy (SMA) is an inherited neuromuscular disorder characterized by progressive muscle weakness and atrophy, resulting from the degeneration of motor neurons in the spinal cord. A critical aspect of SMA is its impact on respiratory function. As the disease progresses, respiratory muscles, in particular intercostal muscles, become increasingly affected, leading to breathing difficulties and respiratory failure. Without intervention, many children with SMA type 1 die from respiratory failure before their second year of life. While assisted ventilation has improved survival, it often results in ventilator dependence. The development of new SMN-augmenting therapies has renewed optimism, but their long-term impact on respiratory function is uncertain, and non-invasive respiratory support remains an important part of SMA management. Despite the importance of respiratory support in SMA, knowledge regarding sleep disorders in this population is limited. This review aims to synthesize existing literature on sleep and sleep-related breathing disorders in patients with SMA, with a focus on SMA type 1. We summarize evidence of sleep-disordered breathing and respiratory failure in SMA, as well as outcomes and survival benefits associated with non-invasive or invasive ventilation with or without pharmacological therapies. We also discuss current knowledge regarding the effects of novel disease-modifying therapies for SMA on respiratory function and sleep. In conclusion, optimal care for children with SMA requires a multidisciplinary approach that includes neurology and respiratory specialists. This review highlights the importance of monitoring sleep and respiratory function in SMA, as well as the potential benefits and challenges associated with assisted ventilation combined with new therapies.
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Affiliation(s)
- Elena Abati
- Neurology Unit, Department of Neuroscience and Mental Health, Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, Milan, Italy
- Department of Pathophysiology and Transplantation (DEPT), University of Milan, Milan, Italy
| | - Eleonora Mauri
- Neurophysiopathology Unit, Department of Neuroscience and Mental Health, Foundation IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Martina Rimoldi
- Neurology Unit, Department of Neuroscience and Mental Health, Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, Milan, Italy
- Department of Pathophysiology and Transplantation (DEPT), University of Milan, Milan, Italy
| | - Barbara Madini
- Pediatric Pneumonology, Foundation IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Francesca Patria
- Pediatric Pneumonology, Foundation IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giacomo Pietro Comi
- Neurology Unit, Department of Neuroscience and Mental Health, Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, Milan, Italy
- Department of Pathophysiology and Transplantation (DEPT), University of Milan, Milan, Italy
| | - Stefania Corti
- Department of Pathophysiology and Transplantation (DEPT), University of Milan, Milan, Italy
- Neuromuscular Disease Unit, Department of Neurosciences and Mental Health, Foundation IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
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10
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Fernandes BD, Krug BC, Rodrigues FD, Cirilo HNC, Borges SS, Schwartz IVD, Probst LF, Zimmermann I. Efficacy and safety of onasemnogene abeparvovec for the treatment of patients with spinal muscular atrophy type 1: A systematic review with meta-analysis. PLoS One 2024; 19:e0302860. [PMID: 38713659 PMCID: PMC11075831 DOI: 10.1371/journal.pone.0302860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 04/14/2024] [Indexed: 05/09/2024] Open
Abstract
BACKGROUND Onasemnogene abeparvovec has been approved for the treatment of spinal muscular atrophy 5q type 1 in several countries, which calls for an independent assessment of the evidence regarding efficacy and safety. OBJECTIVE Conduct a meta-analysis to assess the efficacy and safety of onasemnogene abeparvovec in patients diagnosed with SMA type 1, based on the available evidence. METHODS This article results from searches conducted on databases up to November 2022. Outcomes of interest were global survival and event-free survival, improvement in motor function and treatment-related adverse events. Risk of bias assessment and certainty of evidence were performed for each outcome. Proportional meta-analysis models were performed when applicable. RESULTS Four reports of three open-label, non-comparative clinical trials covering 67 patients were included. Meta-analyses of data available in a 12-month follow-up estimate a global survival of 97.56% (95%CI: 92.55 to 99.86, I2 = 0%, n = 67), an event-free survival of 96.5% (95%CI: 90.76 to 99.54, I2 = 32%, n = 66) and a CHOP-INTEND score ≥ 40 points proportion of 87.28% (95%CI: 69.81 to 97.83, I2 = 69%, n = 67). Proportion of 52.64% (95%CI: 27.11 to 77.45, I2 = 78%, n = 67) of treatment-related adverse events was estimated. CONCLUSION The results indicate a potential change in the natural history of type 1 SMA, but the methodological limitations of the studies make the real extent of the technology's long-term benefits uncertain.
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Affiliation(s)
- Brígida Dias Fernandes
- Hospital Alemão Oswaldo Cruz, Unidade de Avaliação de Tecnologias em Saúde, São Paulo, SP, Brazil
- Instituto Capixaba de Ensino, Pesquisa e Inovação em Saúde (ICEPi), Vitória, ES, Brazil
| | - Bárbara Corrêa Krug
- Hospital Alemão Oswaldo Cruz, Unidade de Avaliação de Tecnologias em Saúde, São Paulo, SP, Brazil
- Secretaria Estadual da Saúde do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Fernanda D’Athayde Rodrigues
- Hospital Alemão Oswaldo Cruz, Unidade de Avaliação de Tecnologias em Saúde, São Paulo, SP, Brazil
- Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Hérica Núbia Cardoso Cirilo
- Hospital Alemão Oswaldo Cruz, Unidade de Avaliação de Tecnologias em Saúde, São Paulo, SP, Brazil
- Núcleo de Avaliação de Tecnologias em Saúde do Hospital das Clínicas da Universidade Federal de Goiás/Ebserh, Goiânia, GO, Brazil
| | - Stéfani Sousa Borges
- Hospital Alemão Oswaldo Cruz, Unidade de Avaliação de Tecnologias em Saúde, São Paulo, SP, Brazil
| | | | - Livia Fernandes Probst
- Hospital Alemão Oswaldo Cruz, Unidade de Avaliação de Tecnologias em Saúde, São Paulo, SP, Brazil
| | - Ivan Zimmermann
- Hospital Alemão Oswaldo Cruz, Unidade de Avaliação de Tecnologias em Saúde, São Paulo, SP, Brazil
- Departamento de Saúde Coletiva, Faculdade de Ciências da Saúde, University of Brasilia, Brasília, DF, Brazil
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11
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Gowda V, Atherton M, Murugan A, Servais L, Sheehan J, Standing E, Manzur A, Scoto M, Baranello G, Munot P, McCullagh G, Willis T, Tirupathi S, Horrocks I, Dhawan A, Eyre M, Vanegas M, Fernandez-Garcia MA, Wolfe A, Pinches L, Illingworth M, Main M, Abbott L, Smith H, Milton E, D’Urso S, Vijayakumar K, Marco SS, Warner S, Reading E, Douglas I, Muntoni F, Ong M, Majumdar A, Hughes I, Jungbluth H, Wraige E. Efficacy and safety of onasemnogene abeparvovec in children with spinal muscular atrophy type 1: real-world evidence from 6 infusion centres in the United Kingdom. THE LANCET REGIONAL HEALTH. EUROPE 2024; 37:100817. [PMID: 38169987 PMCID: PMC10758961 DOI: 10.1016/j.lanepe.2023.100817] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/17/2023] [Accepted: 11/29/2023] [Indexed: 01/05/2024]
Abstract
Background Real-world data on the efficacy and safety of onasemnogene abeparvovec (OA) in spinal muscular atrophy (SMA) are needed, especially to overcome uncertainties around its use in older and heavier children. This study evaluated the efficacy and safety of OA in patients with SMA type 1 in the UK, including patients ≥2 years old and weighing ≥13.5 kg. Methods This observational cohort study used data from patients with genetically confirmed SMA type 1 treated with OA between May 2021 and January 2023, at 6 infusion centres in the United Kingdom. Functional outcomes were assessed using age-appropriate functional scales. Safety analyses included review of liver function, platelet count, cardiac assessments, and steroid requirements. Findings Ninety-nine patients (45 SMA therapy-naïve) were treated with OA (median age at infusion: 10 [range, 0.6-89] months; median weight: 7.86 [range, 3.2-20.2] kg; duration of follow-up: 3-22 months). After OA infusion, mean ± SD change in CHOP-INTEND score was 11.0 ± 10.3 with increased score in 66/78 patients (84.6%); patients aged <6 months had a 13.9 points higher gain in CHOP-INTEND score than patients ≥2 years (95% CI, 6.8-21.0; P < 0.001). Asymptomatic thrombocytopenia (71/99 patients; 71.7%), asymptomatic troponin-I elevation (30/89 patients; 33.7%) and transaminitis (87/99 patients; 87.9%) were reported. No thrombotic microangiopathy was observed. Median steroid treatment duration was 97 (range, 28-548) days with dose doubled in 35/99 patients (35.4%). There were 22.5-fold increased odds of having a transaminase peak >100 U/L (95% CI, 2.3-223.7; P = 0.008) and 21.2-fold increased odds of steroid doubling, as per treatment protocol (95% CI, 2.2-209.2; P = 0.009) in patients weighing ≥13.5 kg versus <8.5 kg. Weight at infusion was positively correlated with steroid treatment duration (r = 0.43; P < 0.001). Worsening transaminitis, despite doubling of oral prednisolone, led to treatment with intravenous methylprednisolone in 5 children. Steroid-sparing immunosuppressants were used in 5 children to enable steroid weaning. Two deaths apparently unrelated to OA were reported. Interpretation OA led to functional improvements and was well tolerated with no persistent clinical complications, including in older and heavier patients. Funding Novartis Innovative Therapies AG provided a grant for independent medical writing services.
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Affiliation(s)
- Vasantha Gowda
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
| | - Mark Atherton
- Sheffield Children’s NHS Foundation Trust, Sheffield, United Kingdom
| | - Archana Murugan
- Department of Paediatric Neurology, University Hospital Bristol, Bristol, United Kingdom
| | - Laurent Servais
- MDUK Oxford Neuromuscular Centre and NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, United Kingdom
- Division of Child Neurology, Centre de Référence des Maladies Neuromusculaires, Department of Pediatrics, University Hospital Liège and University of Liège, Avenue de l’Hôpital 1 4000 Liège, Belgium
| | - Jennie Sheehan
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
| | - Emma Standing
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
| | - Adnan Manzur
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital, London, United Kingdom
| | - Mariacristina Scoto
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital, London, United Kingdom
| | - Giovanni Baranello
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital, London, United Kingdom
- NIHR Great Ormond Street Hospital Biomedical Research Centre and Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Pinki Munot
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital, London, United Kingdom
| | - Gary McCullagh
- Royal Manchester Children’s Hospital, Manchester, United Kingdom
| | - Tracey Willis
- Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, United Kingdom
| | - Sandya Tirupathi
- Royal Belfast Hospital for Sick Children, Belfast, United Kingdom
| | - Iain Horrocks
- Royal Hospital for Children, Glasgow, United Kingdom
| | - Anil Dhawan
- Paediatric Liver, GI and Nutrition Centre and MowatLabs, King’s College Hospital, London, United Kingdom
| | - Michael Eyre
- School of Biomedical Engineering and Imaging Sciences, King’s College London, London, United Kingdom
| | - Maria Vanegas
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
| | - Miguel A. Fernandez-Garcia
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
| | - Amy Wolfe
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
| | - Laura Pinches
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
| | - Marjorie Illingworth
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Marion Main
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital, London, United Kingdom
| | - Lianne Abbott
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital, London, United Kingdom
| | - Hayley Smith
- Department of Paediatric Neurology, University Hospital Bristol, Bristol, United Kingdom
| | - Emily Milton
- Department of Paediatric Neurology, University Hospital Bristol, Bristol, United Kingdom
| | - Sarah D’Urso
- Sheffield Children’s NHS Foundation Trust, Sheffield, United Kingdom
| | | | - Silvia Sanchez Marco
- Paediatric Neurology Department, University Hospital of Wales, Cardiff, United Kingdom
| | - Sinead Warner
- Royal Manchester Children’s Hospital, Manchester, United Kingdom
| | - Emily Reading
- Royal Manchester Children’s Hospital, Manchester, United Kingdom
| | - Isobel Douglas
- Royal Belfast Hospital for Sick Children, Belfast, United Kingdom
| | - Francesco Muntoni
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital, London, United Kingdom
- NIHR Great Ormond Street Hospital Biomedical Research Centre and Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Min Ong
- Sheffield Children’s NHS Foundation Trust, Sheffield, United Kingdom
| | - Anirban Majumdar
- Department of Paediatric Neurology, University Hospital Bristol, Bristol, United Kingdom
| | - Imelda Hughes
- Royal Manchester Children’s Hospital, Manchester, United Kingdom
| | - Heinz Jungbluth
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
- Randall Centre for Cell and Molecular Biophysics, Faculty of Life Sciences and Medicine (FoLSM), London, King’s College London, London, United Kingdom
- King’s College London, London, United Kingdom
| | - Elizabeth Wraige
- Children’s Neurosciences, Evelina London Children’s Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
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12
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Servais L, Day JW, De Vivo DC, Kirschner J, Mercuri E, Muntoni F, Proud CM, Shieh PB, Tizzano EF, Quijano-Roy S, Desguerre I, Saito K, Faulkner E, Benguerba KM, Raju D, LaMarca N, Sun R, Anderson FA, Finkel RS. Real-World Outcomes in Patients with Spinal Muscular Atrophy Treated with Onasemnogene Abeparvovec Monotherapy: Findings from the RESTORE Registry. J Neuromuscul Dis 2024; 11:425-442. [PMID: 38250783 DOI: 10.3233/jnd-230122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Background Long-term, real-world effectiveness and safety data of disease-modifying treatments for spinal muscular atrophy (SMA) are important for assessing outcomes and providing information for a larger number and broader range of SMA patients than included in clinical trials. Objective We sought to describe patients with SMA treated with onasemnogene abeparvovec monotherapy in the real-world setting. Methods RESTORE is a prospective, multicenter, multinational, observational registry that captures data from a variety of sources. Results Recruitment started in September 2018. As of May 23, 2022, data were available for 168 patients treated with onasemnogene abeparvovec monotherapy. Median (IQR) age at initial SMA diagnosis was 1 (0-6) month and at onasemnogene abeparvovec infusion was 3 (1-10) months. Eighty patients (47.6%) had two and 70 (41.7%) had three copies of SMN2, and 98 (58.3%) were identified by newborn screening. Infants identified by newborn screening had a lower age at final assessment (mean age 11.5 months) and greater mean final (SD) CHOP INTEND score (57.0 [10.0] points) compared with clinically diagnosed patients (23.1 months; 52.1 [8.0] points). All patients maintained/achieved motor milestones. 48.5% (n = 81/167) experienced at least one treatment-emergent adverse event (AE), and 31/167 patients (18.6%) experienced at least one serious AE, of which 8/31 were considered treatment-related. Conclusion These real-world outcomes support findings from the interventional trial program and demonstrate effectiveness of onasemnogene abeparvovec over a large patient population, which was consistent with initial clinical data and published 5-year follow-up data. Observed AEs were consistent with the established safety profile of onasemnogene abeparvovec.
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Affiliation(s)
- Laurent Servais
- MDUK Oxford Neuromuscular Centre & NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
- Neuromuscular Reference Center, Department of Paediatrics, University and University Hospital of Liège, Liège, Belgium
| | - John W Day
- Department of Neurology, Stanford University Medical Center, Stanford, CA, USA
| | - Darryl C De Vivo
- Departments of Neurology and Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Janbernd Kirschner
- Department for Neuropediatrics and Muscle Disease, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Eugenio Mercuri
- Department of Paediatric Neurology and Nemo Clinical Centre, Catholic University, Rome, Italy
| | - Francesco Muntoni
- 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
| | - Crystal M Proud
- Children's Hospital of The King's Daughters, Norfolk, VA, USA
| | - Perry B Shieh
- Department of Neurology, David Geffen School of Medicine at UCLA, University of California, Los Angeles, Los Angeles, CA, USA
| | - Eduardo F Tizzano
- Department of Clinical and Molecular Genetics, Hospital Vall d'Hebron, Barcelona, Spain
| | - Susana Quijano-Roy
- Garches Neuromuscular Reference Center, Child Neurology and ICU Department, APHP Raymond Poincare University Hospital (UVSQ Paris Saclay), Garches, France
| | | | - Kayoko Saito
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan
| | - Eric Faulkner
- Novartis Gene Therapies, Inc., Bannockburn, IL, USA
- Institute for Precision and Individualized Therapy, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, IL, USA
- Genomics, Biotech and Emerging Medical Technology Institute, National Association of Managed Care Physicians, Richmond, VA, USA
| | | | - Dheeraj Raju
- Novartis Gene Therapies, Inc., Bannockburn, IL, USA
| | | | - Rui Sun
- Novartis Gene Therapies, Inc., Bannockburn, IL, USA
| | - Frederick A Anderson
- Center for Outcomes Research, University of Massachusetts Medical School, Worcester, MA, USA
| | - Richard S Finkel
- Center for Experimental Neurotherapeutics, St. Jude Children's Research Hospital, Memphis, TN, USA
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13
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Waldrop MA, Chagat S, Storey M, Meyer A, Iammarino M, Reash N, Alfano L, Lowes L, Noritz G, Prochoroff A, Rossman I, Ginsberg M, Mosher K, Broomall E, Bass N, Gushue C, Kotha K, Paul G, Shell R, Tsao CY, Mendell JR, Connolly AM. Continued safety and long-term effectiveness of onasemnogene abeparvovec in Ohio. Neuromuscul Disord 2024; 34:41-48. [PMID: 38142474 DOI: 10.1016/j.nmd.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 11/01/2023] [Accepted: 11/27/2023] [Indexed: 12/26/2023]
Abstract
5q spinal muscular atrophy (SMA) is an autosomal recessive neurodegenerative disease caused by absence of the SMN1 gene with three FDA approved genetic therapies which significantly improve outcomes. The AAV9 mediated gene replacement therapy, onasemnogene abeparvovec, has the greatest potential for side effects. Here we report the safety and outcomes from 46 children treated with onasemnogene abeparvovec in the state of Ohio between December 2018 and January 2023. In our cohort, onasemnogene abeparvovec treatment remained safe and no child experienced any significant adverse events, including thrombotic microangiopathy, liver failure or death. All children experienced benefit, although the benefit in those with 2 copies of SMN2 was variable. 79 % of the children treated when symptomatic had a SMN2 modifying therapy added on. With careful screening and post treatment monitoring, onasemnogene abeparvovec is safe and effective for children with SMA in the state of Ohio, but more work needs to be done to ensure optimal outcomes for all children with 2 copies of SMN2.
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Affiliation(s)
- Megan A Waldrop
- Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus OH, 43205, USA; Departments of Pediatrics and Neurology, Ohio State University Wexner Medical Center, Columbus OH, 43205, USA.
| | - Shannon Chagat
- Department of Neurology, Nationwide Children's Hospital, Columbus, OH 43205, USA
| | - Michael Storey
- Department of Pharmacy, Nationwide Children's Hospital, Columbus, OH 43205, USA
| | - Alayne Meyer
- Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus OH, 43205, USA
| | - Megan Iammarino
- Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus OH, 43205, USA
| | - Natalie Reash
- Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus OH, 43205, USA
| | - Lindsay Alfano
- Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus OH, 43205, USA
| | - Linda Lowes
- Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus OH, 43205, USA
| | - Garey Noritz
- Department of Pediatrics, Nationwide Children's hospital, Columbus, OH 43205, USA
| | - Andre Prochoroff
- Department of Pediatric Neurology, Metro Health, Cleveland OH, USA
| | - Ian Rossman
- Department of Pediatric Neurology, Akron Children's Hospital, Akron OH, USA
| | - Matthew Ginsberg
- Department of Pediatric Neurology, Akron Children's Hospital, Akron OH, USA
| | - Kathryn Mosher
- Department of Pediatric Physiatry, Akron Children's Hospital, Akron OH, USA
| | - Eileen Broomall
- Department of Pediatric Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati OH, USA
| | - Nancy Bass
- Division of Pediatric Neurology, Department of Pediatrics, Rainbow Babies and Children's Hospital, Cleveland OH, USA
| | - Courtney Gushue
- Departments of Pediatrics and Pulmonology, Ohio State University Wexner Medical Center, Columbus OH 43205, USA
| | - Kavitha Kotha
- Departments of Pediatrics and Pulmonology, Ohio State University Wexner Medical Center, Columbus OH 43205, USA
| | - Grace Paul
- Departments of Pediatrics and Pulmonology, Ohio State University Wexner Medical Center, Columbus OH 43205, USA
| | - Richard Shell
- Departments of Pediatrics and Pulmonology, Ohio State University Wexner Medical Center, Columbus OH 43205, USA
| | - Chang-Yong Tsao
- Departments of Pediatrics and Neurology, Ohio State University Wexner Medical Center, Columbus OH, 43205, USA
| | - Jerry R Mendell
- Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus OH, 43205, USA; Departments of Pediatrics and Neurology, Ohio State University Wexner Medical Center, Columbus OH, 43205, USA
| | - Anne M Connolly
- Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus OH, 43205, USA; Departments of Pediatrics and Neurology, Ohio State University Wexner Medical Center, Columbus OH, 43205, USA
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14
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Zanoteli E, Araujo APDQC, Becker MM, Fortes CPDD, França MC, Machado-Costa MC, Marques W, Matsui Jr C, Mendonça RH, Nardes F, Oliveira ASB, Pessoa ALS, Saute JAM, Sgobbi P, Van der Linden H, Gurgel-Giannetti J. Consensus from the Brazilian Academy of Neurology for the diagnosis, genetic counseling, and use of disease-modifying therapies in 5q spinal muscular atrophy. ARQUIVOS DE NEURO-PSIQUIATRIA 2024; 82:1-18. [PMID: 38316428 PMCID: PMC10843933 DOI: 10.1055/s-0044-1779503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 12/14/2023] [Indexed: 02/07/2024]
Abstract
Spinal muscular atrophy linked to chromosome 5 (SMA-5q) is an autosomal recessive genetic disease caused by mutations in the SMN1. SMA-5q is characterized by progressive degeneration of the spinal cord and bulbar motor neurons, causing severe motor and respiratory impairment with reduced survival, especially in its more severe clinical forms. In recent years, highly effective disease-modifying therapies have emerged, either acting by regulating the splicing of exon 7 of the SMN2 gene or adding a copy of the SMN1 gene through gene therapy, providing a drastic change in the natural history of the disease. In this way, developing therapeutic guides and expert consensus becomes essential to direct the use of these therapies in clinical practice. This consensus, prepared by Brazilian experts, aimed to review the main available disease-modifying therapies, critically analyze the results of clinical studies, and provide recommendations for their use in clinical practice for patients with SMA-5q. This consensus also addresses aspects related to diagnosis, genetic counseling, and follow-up of patients under drug treatment. Thus, this consensus provides valuable information regarding the current management of SMA-5q, helping therapeutic decisions in clinical practice and promoting additional gains in outcomes.
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Affiliation(s)
- Edmar Zanoteli
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Neurologia, São Paulo SP, Brazil.
| | | | - Michele Michelin Becker
- Hospital de Clínicas de Porto Alegre, Departamento de Pediatria, Unidade de Neurologia Infantil, Porto Alegre RS, Brazil.
| | | | - Marcondes Cavalcante França
- Universidade Estadual de Campinas, Faculdade de Ciências Médicas, Departamento de Neurologia, Campinas SP, Brazil.
| | | | - Wilson Marques
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Neurociências e Ciências do Comportamento, Ribeirão Preto SP, Brazil.
| | - Ciro Matsui Jr
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Neurologia, São Paulo SP, Brazil.
| | - Rodrigo Holanda Mendonça
- Universidade de São Paulo, Faculdade de Medicina, Departamento de Neurologia, São Paulo SP, Brazil.
| | - Flávia Nardes
- Universidade Federal do Rio de Janeiro, Instituto de Puericultura e Pediatria Martagão Gesteira, Rio de Janeiro RJ, Brazil.
| | | | | | - Jonas Alex Morales Saute
- Universidade Federal do Rio Grande do Sul, Faculdade de Medicina, Hospital de Clínicas de Porto Alegre, Serviços de Genética Médica e de Neurologia, Porto Alegre RS, Brazil.
| | - Paulo Sgobbi
- Universidade Federal de São Paulo, Departamento de Neurologia e Neurocirurgia, São Paulo SP, Brazil.
| | - Hélio Van der Linden
- Centro de Reabilitação Dr. Henrique Santillo, Serviço de Neurologia Infantil e Neurofisiologia, Goiânia GO, Brazil.
| | - Juliana Gurgel-Giannetti
- Universidade Federal de Minas Gerais, Faculdade de Medicina, Departamento de Pediatria, Belo Horizonte MG, Brazil.
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15
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Toro W, Yang M, Georgieva M, Anderson A, LaMarca N, Patel A, Akbarnejad H, Dabbous O. Patient and Caregiver Outcomes After Onasemnogene Abeparvovec Treatment: Findings from the Cure SMA 2021 Membership Survey. Adv Ther 2023; 40:5315-5337. [PMID: 37776479 PMCID: PMC10611830 DOI: 10.1007/s12325-023-02685-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 09/08/2023] [Indexed: 10/02/2023]
Abstract
INTRODUCTION Onasemnogene abeparvovec (OA) is the only gene replacement therapy currently approved for spinal muscular atrophy (SMA) treatment. We sought to assess real-world patient and caregiver outcomes after OA treatment for SMA. METHODS Patients who received OA were identified from the 2021 Cure SMA Membership Survey. Those treated at 6-23 months of age were matched to non-patients treated with OA on the basis of age at the time of survey and survival motor neuron 2 gene copy number. Patient characteristics, motor milestones, and resource and supportive care use, as well as caregiver proxy-reported health-related quality of life (HRQOL), were described. Caregiver unmet needs and HRQOL were also assessed. RESULTS Of the 614 patients in the survey, 64 received OA, and 17 were matched with 28 non-OA-treated patients. In general, a greater percentage of OA-treated patients achieved various motor milestones, including 100% sitting without support and 58.8% walking with assistance. OA-treated patients also had numerically lower rates of hospitalization and surgery. None required tracheostomy with a ventilator. The rate of using oxygen or a breathing machine for more than 16 h was also lower for OA-treated patients. OA-treated patients had less frequent trouble swallowing. HRQOL was reported to be similar to non-OA-treated patients. Caregivers of OA-treated patients reported better patient mobility scores and less work impairment. CONCLUSIONS The study suggests that treatment with OA is associated with greater rates of motor milestone achievements and less resource and supportive care use for patients with SMA treated at 6-23 months of age in the real world. For caregivers, it may also potentially reduce unmet needs, improve HRQOL, and reduce work impairment.
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Affiliation(s)
- Walter Toro
- Novartis Gene Therapies, Inc., 2275 Half Day Road, Suite 200, Bannockburn, IL, 60015, USA.
| | - Min Yang
- Analysis Group, Inc., Boston, MA, USA
| | | | | | - Nicole LaMarca
- Novartis Gene Therapies, Inc., 2275 Half Day Road, Suite 200, Bannockburn, IL, 60015, USA
| | - Anish Patel
- Novartis Gene Therapies, Inc., 2275 Half Day Road, Suite 200, Bannockburn, IL, 60015, USA
| | | | - Omar Dabbous
- Novartis Gene Therapies, Inc., 2275 Half Day Road, Suite 200, Bannockburn, IL, 60015, USA
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16
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Zhuang W, Lu M, Wu Y, Chen Z, Wang M, Wang X, Guan S, Lin W. Safety Concerns with Nusinersen, Risdiplam, and Onasemnogene Abeparvovec in Spinal Muscular Atrophy: A Real-World Pharmacovigilance Study. Clin Drug Investig 2023; 43:949-962. [PMID: 37995087 DOI: 10.1007/s40261-023-01320-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/2023] [Indexed: 11/24/2023]
Abstract
BACKGROUND AND OBJECTIVE Spinal muscular atrophy (SMA) is a genetic disorder with limited treatment options. It is crucial to have a comprehensive understanding of drug safety in order to make informed clinical drug selections for patients with SMA. Assessing the safety profiles of therapeutic drugs for SMA has been challenging due to the limited number of patients included in clinical trials. This study aims to investigate and compare the potential safety concerns associated with three leading SMA therapeutic drugs: nusinersen, risdiplam, and onasemnogene abeparvovec. METHODS The FDA Adverse Event Reporting System database was used to analyze drug safety, and a case (SMA drug)/noncase (all other drugs in the database) approach was employed to estimate safety signals through disproportionality analysis and reporting odds ratio (ROR). Veen analysis was conducted to compare and select the idiosyncratic adverse events (AEs) associated with each drug. RESULTS The study included 5324 cases of nusinersen, 1184 cases of risdiplam, and 1277 cases of onasemnogene abeparvovec. Venn analysis revealed 27 common AEs among the three drugs, including cardiac, gastrointestinal, metabolism, musculoskeletal, renal, respiratory disorders, and infections. Additionally, 196 AEs exclusively found in nusinersen included post lumbar puncture syndrome [ROR (95% CI) = 6120.91 (5057.01-7408.64), n = 372], procedural pain [ROR (95% CI) = 54.86 (48.13-62.54), n = 234], idiopathic intracranial hypertension [ROR (95% CI) = 6.12 (2.29-16.33), n = 4], and hypokalemia [ROR (95% CI) = 2.02 (1.24-3.31), n = 16]. Additionally, transient deafness was identified as an unexpected and rare, yet severe, AE for nusinersen [ROR (95% CI) = 23.32 (8.71-62.44), n = 4]. Risdiplam exhibited 50 AEs exclusively, with notable idiosyncratic AEs including diarrhea [ROR (95% CI) = 4.55 (3.79-5.46), n = 121], fatigue [ROR (95% CI) = 2.03 (1.6-2.57), n = 70], photosensitivity reaction [ROR (95% CI) = 9.50 (4.25-21.13), n = 6], rash [ROR (95% CI) = 1.90 (1.36-2.67), n = 34], and [ROR (95% CI) = 4.3 (1.93-9.58), n = 6] in comparison with the other two drugs. Moreover, ileus [ROR (95% CI) = 11.11 (4.14-29.51), n = 4], gastrointestinal hemorrhage [ROR (95% CI) = 2.55 (1.15-5.69), n = 6], and hypoglycemic unconsciousness [ROR (95% CI) = 153.58 (62.98-374.54), n = 5] were rare but severe AEs associated with risdiplam. Onasemnogene abeparvovec had 143 exclusively identified AEs, with significant high signals for troponin I increase [ROR (95% CI) = 627.1 (492.2-798.99), n = 78], troponin T increase [ROR (95% CI) = 233.98 (153.29-357.15), n = 23], blood lactate dehydrogenase increase [ROR (95% CI) = 39.81 (28.88-54.87), n = 38], and transaminases increase [ROR (95% CI) = 36.88 (29.24-46.52), n = 73]. CONCLUSIONS This study highlights the importance of monitoring injection-related injuries and transient deafness events in patients treated with nusinersen. For onasemnogene abeparvovec, careful monitoring for renal impairment, liver injury, and myocardial damage is necessary. Risdiplam requires attention to the potential risk of rare but severe gastrointestinal damage events and hypoglycemia. Importantly, risdiplam exhibited lower liver and renal toxicity, making it a potential consideration for patients with liver or renal insufficiency or for combined use with other drugs that possess high liver or renal toxicity. These findings can be a reference for drug selection and further prospective studies.
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Affiliation(s)
- Wei Zhuang
- Department of Pharmacy, Women and Children's Hospital, School of Medicine, Xiamen University, 10# Zhenhai Road, Xiamen, China
| | - Mei Lu
- Department of Pediatrics, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Ye Wu
- Department of Ultrasound, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Zhehui Chen
- Department of Pediatrics, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Minying Wang
- Department of Pediatrics, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Xudong Wang
- Department of Xiamen Newborn Screening Center, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China
| | - Shaoxing Guan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Wanlong Lin
- Department of Pharmacy, Women and Children's Hospital, School of Medicine, Xiamen University, 10# Zhenhai Road, Xiamen, China.
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17
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Farrar MA, Calotes-Castillo L, De Silva R, Barclay P, Attwood L, Cini J, Ferrie M, Kariyawasam DS. Gene therapy-based strategies for spinal muscular atrophy-an Asia-Pacific perspective. Mol Cell Pediatr 2023; 10:17. [PMID: 37964159 PMCID: PMC10645685 DOI: 10.1186/s40348-023-00171-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 11/07/2023] [Indexed: 11/16/2023] Open
Abstract
Onasemnogene abeparvovec has been life-changing for children with spinal muscular atrophy (SMA), signifying the potential and progress occurring in gene- and cell-based therapies for rare genetic diseases. Hence, it is important that clinicians gain knowledge and understanding in gene therapy-based treatment strategies for SMA. In this review, we describe the development and translation of onasemnogene abeparvovec from clinical trials to healthcare practice and share knowledge on the facilitators and barriers to implementation. Rapid and accurate SMA diagnosis, awareness, and education to safely deliver gene therapy to eligible patients and access to expertise in multidisciplinary management for neuromuscular disorders are crucial for health system readiness. Early engagement and intersectoral collaboration are required to surmount complex logistical processes and develop policy, governance, and accountability. The collection and utilisation of real-world evidence are also an important part of clinical stewardship, informing ongoing improvements to care delivery and access. Additionally, a research-enabled clinical ecosystem can expand scientific knowledge and discovery to optimise future therapies and magnify health impacts. Important ethical, equity, economic, and sustainability issues are evident, for which we must connect globally.
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Affiliation(s)
- Michelle A Farrar
- Department of Neurology, Sydney Children's Hospital Network, Sydney, New South Wales, Australia.
- Discipline of Paediatrics and Child Health, UNSW Medicine and Health, School of Clinical Medicine, UNSW Sydney, Sydney, New South Wales, Australia.
| | - Loudella Calotes-Castillo
- Division of Paediatric Neurology, Department of Paediatrics and Neurosciences, University of the Philippines - Philippine General Hospital, Manila, Philippines
| | - Ranil De Silva
- Faculty of Medical Sciences, Interdisciplinary Centre for Innovation in Biotechnology and Neuroscience (ICIBN), University of Sri Jayewardenepura, Nugegoda, Sri Lanka
- Institute for Combinatorial Advanced Research and Education, General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka
| | - Peter Barclay
- Pharmacy Department, Sydney Children's Hospitals Network, Sydney, New South Wales, Australia
| | - Lani Attwood
- Kids Advanced Therapeutics Programme, Sydney Children's Hospitals Network, Kids Research, Sydney, New South Wales, Australia
| | - Julie Cini
- Advocacy Beyond Borders, Melbourne, Australia
| | | | - Didu S Kariyawasam
- Department of Neurology, Sydney Children's Hospital Network, Sydney, New South Wales, Australia
- Discipline of Paediatrics and Child Health, UNSW Medicine and Health, School of Clinical Medicine, UNSW Sydney, Sydney, New South Wales, Australia
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18
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Proud CM, Mercuri E, Finkel RS, Kirschner J, De Vivo DC, Muntoni F, Saito K, Tizzano EF, Desguerre I, Quijano‐Roy S, Benguerba K, Raju D, Faulkner E, Servais L. Combination disease-modifying treatment in spinal muscular atrophy: A proposed classification. Ann Clin Transl Neurol 2023; 10:2155-2160. [PMID: 37691296 PMCID: PMC10646995 DOI: 10.1002/acn3.51889] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 09/12/2023] Open
Abstract
We sought to devise a rational, systematic approach for defining/grouping survival motor neuron-targeted disease-modifying treatment (DMT) scenarios. The proposed classification is primarily based on a two-part differentiation: initial DMT, and persistence/discontinuation of subsequent DMT(s). Treatment categories were identified: monotherapy add-on, transient add-on, combination with onasemnogene abeparvovec, bridging to onasemnogene abeparvovec, and switching to onasemnogene abeparvovec. We validated this approach by applying the classification to the 443 patients currently in the RESTORE registry and explored the demographics of these different groups of patients. This work forms the basis to explore the safety and efficacy profile of the different combinations of DMT in SMA.
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Affiliation(s)
| | - Eugenio Mercuri
- Department of Paediatric Neurology and Nemo Clinical CentreCatholic UniversityRomeItaly
| | - Richard S. Finkel
- Center for Experimental Neurotherapeutics, St. Jude Children's Research HospitalMemphisTennesseeUSA
| | - Janbernd Kirschner
- Department of Neuropediatrics and Muscle DisordersMedical Center University of Freiburg, Faculty of MedicineFreiburgGermany
| | - Darryl C. De Vivo
- Departments of Neurology and PediatricsColumbia University Irving Medical CenterNew YorkNew YorkUSA
| | - Francesco Muntoni
- The Dubowitz Neuromuscular CentreUniversity College London, Great Ormond Street Institute of Child Health & Great Ormond Street HospitalLondonUK
- National Institute of Health Research, Great Ormond Street Hospital Biomedical Research CentreLondonUK
| | - Kayoko Saito
- Institute of Medical Genetics, Tokyo Women's Medical UniversityTokyoJapan
| | - Eduardo F. Tizzano
- Department of Clinical and Molecular GeneticsHospital Vall d'HebronBarcelonaSpain
| | | | - Susana Quijano‐Roy
- Garches Neuromuscular Reference Center (GNMH)APHP Raymond Poincare University Hospital (UVSQ Paris Saclay)GarchesFrance
| | | | - Dheeraj Raju
- Novartis Gene Therapies, IncBannockburnIllinoisUSA
| | - Eric Faulkner
- Novartis Gene Therapies, IncBannockburnIllinoisUSA
- Institute for Precision and Individualized Therapy, Eshelman School of Pharmacy, University of North Carolina at Chapel HillChapel HillNorth CarolinaUSA
- Genomics, Biotech and Emerging Medical Technology Institute, National Association of Managed Care PhysiciansRichmondVirginiaUSA
| | - Laurent Servais
- Department of PaediatricsMDUK Oxford Neuromuscular Centre & NIHR Oxford Biomedical Research CentreUniversity of OxfordOxfordUK
- Department of Paediatrics, Neuromuscular Reference CenterUniversity and University Hospital of LiègeLiègeBelgium
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19
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Oskoui M, Servais L. Spinal Muscular Atrophy. Continuum (Minneap Minn) 2023; 29:1564-1584. [PMID: 37851043 DOI: 10.1212/con.0000000000001338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2023]
Abstract
OBJECTIVE This article provides a comprehensive overview of the diagnostic assessment and treatment of individuals with spinal muscular atrophy (SMA) due to homozygous deletions of SMN1 . LATEST DEVELOPMENTS In recent years, most states have incorporated SMA in their newborn screening panel. To provide the earliest diagnosis possible after symptom onset, vigilance is needed for births in states without newborn screening for SMA and when compound heterozygotes are missed by newborn screening programs. Supportive care for respiratory, nutritional, and orthopedic health impacts outcomes and is the cornerstone of care. Adaptive equipment, including assistive home technology, enables affected individuals to gain autonomy in their daily activities. Pharmacologic treatments approved by the US Food and Drug Administration (FDA) include three drugs that increase deficient survival motor neuron protein levels through SMN1 - or SMN2 - directed pathways: nusinersen, onasemnogene abeparvovec, and risdiplam. Efficacy for these trials was measured in event-free survival (survival without the need for permanent ventilation) and gains in functional motor outcomes. Earlier treatment is most effective across all treatments. ESSENTIAL POINTS The diagnostic and therapeutic landscapes for SMA have seen dramatic advancements in recent years, improving prognosis. Optimized supportive care remains essential, and vigilance is needed to define the new natural history of this disease.
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20
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Hashimoto K, Yokokawa M, Yamashita D, Yuge K, Otsubo Y. Spinal Muscular Atrophy Type I With False Negative in Newborn Screening: A Case Report. Cureus 2023; 15:e42382. [PMID: 37621829 PMCID: PMC10445771 DOI: 10.7759/cureus.42382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/24/2023] [Indexed: 08/26/2023] Open
Abstract
Spinal muscular atrophy (SMA) is an autosomal recessive neuromuscular disorder caused by the deletion or mutation of the survival motor neuron 1 (SMN1) gene. The establishment of effective newborn screening (NBS) for SMA is important for early diagnosis so that treatment can be administered in the pre-symptomatic or early disease stages. Polymerase chain reaction (PCR)-based genetic testing with dried blood spots has been used in NBS to detect the homozygous deletion of exon 7 in SMN1, however, this methodology is not able to detect newborn infants with heterozygous deletions and/or point mutations in SMN1. We report the case of a male infant who was diagnosed with SMA despite the NBS being negative for all conditions including SMA. The patient presented with severe hypotonia and muscle weakness from around 14 days of age. SMA was suspected and sequence analysis of SMN1 and SMN2 was conducted using the multiplex ligation-dependent probe amplification (MLPA) method, which revealed compound heterozygous mutations of SMN1. The patient was diagnosed with SMA and started on modulating agents including gene therapy. His motor function improved slightly with treatment, however, his motor development remained prominently retarded by 5 months of age. This case highlights the importance of investigating SMA as a potential diagnosis even when the NBS result is negative.
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Affiliation(s)
| | - Mari Yokokawa
- Department of Pediatrics, Sasebo City General Hospital, Sasebo, JPN
| | - Daisuke Yamashita
- Department of Pediatrics and Child Health, Kurume University School of Medicine, Kurume, JPN
| | - Kotaro Yuge
- Department of Pediatrics and Child Health, Kurume University School of Medicine, Kurume, JPN
| | - Yoshikazu Otsubo
- Department of Pediatrics, Sasebo City General Hospital, Sasebo, JPN
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21
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Balaji L, Farrar MA, D'Silva AM, Kariyawasam DS. Decision-making and challenges within the evolving treatment algorithm in spinal muscular atrophy: a clinical perspective. Expert Rev Neurother 2023; 23:571-586. [PMID: 37227306 DOI: 10.1080/14737175.2023.2218549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 05/23/2023] [Indexed: 05/26/2023]
Abstract
INTRODUCTION The clinical application of disease modifying therapies has dramatically changed the paradigm of the management of people with spinal muscular atrophy (SMA), from sole reliance on symptomatic care directed toward the downstream consequences of muscle weakness, to proactive intervention and even preventative care. AREAS COVERED In this perspective, the authors evaluate the contemporary therapeutic landscape of SMA and discuss the evolution of novel phenotypes and the treatment algorithm, including the key factors that define individual treatment choice and treatment response. The benefits achieved by early diagnosis and treatment through newborn screening are highlighted, alongside an appraisal of emerging prognostic methods and classification frameworks to inform clinicians, patients, and families about disease course, manage expectations, and improve care planning. A future perspective of unmet needs and challenges is provided, emphasizing the key role of research. EXPERT OPINION SMN-augmenting therapies have improved health outcomes for people with SMA and powered the practice of personalized medicine. Within this new proactive diagnostic and treatment paradigm, new phenotypes and different disease trajectories are emerging. Ongoing collaborative research efforts to understand the biology of SMA and define optimal response are critical to refining future approaches.
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Affiliation(s)
- Lakshmi Balaji
- Department of Neurology, Sydney Children's Hospital Network, Sydney, New South Wales, Australia
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, UNSW Medicine and Health UNSW, Sydney, Australia
| | - Michelle A Farrar
- Department of Neurology, Sydney Children's Hospital Network, Sydney, New South Wales, Australia
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, UNSW Medicine and Health UNSW, Sydney, Australia
- UNSW Kensington Campus, Sydney, Australia
| | - Arlene M D'Silva
- Department of Neurology, Sydney Children's Hospital Network, Sydney, New South Wales, Australia
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, UNSW Medicine and Health UNSW, Sydney, Australia
- UNSW Kensington Campus, Sydney, Australia
| | - Didu S Kariyawasam
- Department of Neurology, Sydney Children's Hospital Network, Sydney, New South Wales, Australia
- Discipline of Paediatrics and Child Health, School of Clinical Medicine, UNSW Medicine and Health UNSW, Sydney, Australia
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22
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Young SD, McGrattan K, Johnson E, van der Heul M, Duong T, Bakke M, Werlauff U, Pasternak A, Cattaneo C, Hoffman K, Fanelli L, Breaks A, Allison K, Baranello G, Finkel R, Coratti G, Lofra RM. Development of an International SMA Bulbar Assessment for Inter-professional Administration. J Neuromuscul Dis 2023:JND221672. [PMID: 37212069 DOI: 10.3233/jnd-221672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
BACKGROUND Progressive weakness can affect bulbar muscles in individuals with moderate to severe forms of spinal muscular atrophy (SMA). The paucity of standardized, valid bulbar assessments capturing clinically significant deficits in SMA impedes the ability to monitor function, facilitate intervention, or detect treatment response. OBJECTIVE To fill this void, an international multidisciplinary team gathered to develop an agreed upon consensus-derived assessment of bulbar function in SMA for inter-professional administration to enhance our ability to monitor disease progression, support clinical management, and evaluate treatment effects. METHODS Fifty-six international clinicians experienced in SMA were invited and engaged using the Delphi method over multiple rounds of web-based surveys to establish consensus. RESULTS Serial virtual meetings occurred with 42 clinicians (21 speech and language therapists, 11 physical therapists, 5 neurologists, 4 occupational therapists, and 1 dentist). Seventy-two validated assessments of bulbar function were identified for potential relevance to individuals with SMA (32 accessible objective, 11 inaccessible objective, 29 patient-reported outcomes). Delphi survey rounds (n = 11, 15, 15) achieved consensus on individual items with relevance and wording discussed. Key aspects of bulbar function identified included: oral intake status, oral facial structure and motor strength, swallowing physiology, voice & speech, and fatigability. CONCLUSIONS Multidisciplinary clinicians with expertise in bulbar function and SMA used Delphi methodology to reach consensus on assessments/items considered relevant for SMA across all age groups. Future steps include piloting the new scale moving towards validation/reliability. This work supports the advancement of assessing bulbar function in children and adults with SMA by a variety of professionals.
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Affiliation(s)
- Sally Dunaway Young
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA, USA
| | - Katlyn McGrattan
- Department of Speech-Language-Hearing Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Emily Johnson
- Department of Speech and Language Therapy, Great Ormond Street Hospital, London, UK
| | - Marise van der Heul
- Department of Neurology, University Medical Center Utrecht, Brain Center UMC Utrecht, Department of Neurology & Neurosurgery, Spieren voor Spieren Kindercentrum, Utrecht, the Netherlands
| | - Tina Duong
- Department of Neurology and Clinical Neurosciences, Stanford University, Palo Alto, CA, USA
| | - Merete Bakke
- Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ulla Werlauff
- National Rehabilitation Centre for Neuromuscular Diseases, Aarhus, Denmark
| | - Amy Pasternak
- Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
- Department of Physical Therapyand Occupational Therapy, Boston Children's Hospital, Boston, MA, USA
| | | | - Katie Hoffman
- Ann and Robert H. Lurie Children's Hospital, Chicago, IL, USA
| | - Lavinia Fanelli
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Anne Breaks
- Acute Speech and Language Therapy Service, Evelina London Children's Hospital, London, UK
| | - Kristen Allison
- Department of Communication Sciences & Disorders, Northeastern University, Boston, MA, USA
| | - Giovanni Baranello
- Dubowitz Neuromuscular Centre, National Institute for Health Research Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health University College London, and Great Ormond Street Hospital Foundation Trust, London
| | - Richard Finkel
- Center for Experimental Neurotherapeutics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Giorgia Coratti
- Pediatric Neurology, Catholic University of Sacred Heart, Rome, Italy
| | - Robert Muni Lofra
- The John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
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Leon-Astudillo C, Okorie CUA, McCown MY, Dy FJ, Puranik S, Prero M, ElMallah MK, Treat L, Gross JE. ATS Core Curriculum 2022. Pediatric Pulmonary Medicine: Updates in pediatric neuromuscular disease. Pediatr Pulmonol 2023. [PMID: 37144867 DOI: 10.1002/ppul.26448] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 04/23/2023] [Indexed: 05/06/2023]
Abstract
The American Thoracic Society Core Curriculum updates clinicians annually in pediatric pulmonary disease. This is a concise review of the Pediatric Pulmonary Medicine Core Curriculum presented at the 2022 American Thoracic Society International Conference. Neuromuscular diseases (NMD) comprise a variety of conditions that commonly affect the respiratory system and cause significant morbidity including dysphagia, chronic respiratory failure, and sleep disordered breathing. Respiratory failure is the most common cause of mortality in this population. Substantial progress has been made in diagnosis, monitoring and treatment for NMD over the last decade. Pulmonary function testing (PFT) is utilized to objectively measure respiratory pump function and PFT milestones are utilized in NMD-specific pulmonary care guidelines. New disease modifying therapies are approved for the treatment of patients with Duchenne muscular dystrophy and spinal muscular atrophy (SMA), including the first ever approved systemic gene therapy, in the case of SMA. Despite extraordinary progress in the medical management of NMD, little is known regarding the respiratory implications and long-term outcomes for patients in the era of advanced therapeutics and precision medicine. The combination of technological and biomedical advancements has increased the complexity of the medical decision-making process for patients and families, thus emphasizing the importance of balancing respect for autonomy with the other foundational principles of medical ethics. This review features an overview of PFT, noninvasive ventilation strategies, novel and developing therapies, as well as the ethical considerations specific to the management of patients with pediatric NMD.
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Affiliation(s)
| | - Caroline U A Okorie
- Department of Pediatrics, Stanford Children's Health, Stanford, California, USA
| | - Michael Y McCown
- Department of Pediatrics, Inova Children's Hospital, Fairfax, Virginia, USA
| | - Fei J Dy
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Sandeep Puranik
- Department of Pediatrics, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Moshe Prero
- Department of Pediatrics, Rainbow Babies and Children's Hospital, Cleveland, Ohio, USA
| | - Mai K ElMallah
- Department of Pediatrics, Duke University Medical Center, Durham, North Carolina, USA
| | - Lauren Treat
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Jane E Gross
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA
- Departments of Pediatrics and Medicine, National Jewish Health, Denver, Colorado, USA
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24
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Shin HJ, Na JH, Lee H, Lee YM. Nusinersen for spinal muscular atrophy types II and III: a retrospective single-center study in South Korea. World J Pediatr 2023; 19:450-459. [PMID: 36441395 DOI: 10.1007/s12519-022-00638-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 10/11/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND This study investigated the efficacy and safety of nusinersen, an antisense oligonucleotide, in patients with spinal muscular atrophy (SMA) types II (OMIM: 253,550) or III (OMIM: 253,400), including those with severe scoliosis or requiring respiratory support via mechanical ventilation. METHODS Data from 40 patients with genetically confirmed SMA who were treated with nusinersen at our institute from March 2019 to April 2022 were retrospectively analyzed. Of these, 30 patients with an age of onset < 3 years and not on permanent ventilation were selected. Clinical and genetic characteristics were investigated, and motor function was evaluated based on the Hammersmith Functional Motor Scale-Expanded (HFMSE) score. RESULTS The mean age of symptom onset was 1.2 years. Most patients were diagnosed with SMA type II (27/30, 90%). Nusinersen was administered via computed tomography-guided or direct intrathecal injection in 87% (26/30) and 13% (4/30) of the patients, respectively. At the 6-, 14-, 22-, and 26-month follow-ups, 72%, 71%, 88%, and 86% of patients showed motor improvement, respectively, with mean changes in HFMSE scores of 2.10, 2.88, 4.21, and 5.29, respectively. Multivariable analysis showed that the use of noninvasive ventilation was associated with poorer outcomes of motor function. CONCLUSIONS Patients with SMA type II or III who received nusinersen treatment showed significant improvement in motor function. A longer treatment duration led to a higher number of patients with improved motor function. No significant side effects of nusinersen were observed. Patients with SMA, even those with severe scoliosis or on respiratory support, can be safely treated using nusinersen.
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Affiliation(s)
- Hui Jin Shin
- Department of Pediatrics, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-Ro, Gangnam-Gu, Seoul, 135-720, Korea
| | - Ji-Hoon Na
- Department of Pediatrics, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-Ro, Gangnam-Gu, Seoul, 135-720, Korea
| | - Hyunjoo Lee
- Department of Pediatrics, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-Ro, Gangnam-Gu, Seoul, 135-720, Korea
| | - Young-Mock Lee
- Department of Pediatrics, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-Ro, Gangnam-Gu, Seoul, 135-720, Korea.
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25
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Pane M, Berti B, Capasso A, Coratti G, Varone A, D’Amico A, Messina S, Masson R, Sansone VA, Donati MA, Agosto C, Bruno C, Ricci F, Pini A, Gagliardi D, Filosto M, Corti S, Leone D, Palermo C, Onesimo R, De Sanctis R, Ricci M, Bitetti I, Sframeli M, Dosi C, Albamonte E, Ticci C, Brolatti N, Bertini E, Finkel R, Mercuri E. Onasemnogene abeparvovec in spinal muscular atrophy: predictors of efficacy and safety in naïve patients with spinal muscular atrophy and following switch from other therapies. EClinicalMedicine 2023; 59:101997. [PMID: 37197706 PMCID: PMC10184045 DOI: 10.1016/j.eclinm.2023.101997] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/19/2023] Open
Abstract
Background Efficacy and safety of onasemnogene abeparvovec (OA) for Spinal Muscular Atrophy infants under 7 months and <8.5 kg has been reported in clinical trials. This study examines efficacy and safety predictors in a wide age (22 days-72 months) and weight (3.2-17 kg) range, also including patients previously treated with other drugs. Methods 46 patients were treated for 12 months between January 2020 and March 2022. Safety profile was also available for another 21 patients with at least 6 month follow-up after OA infusion. 19/67 were treatment naïve when treated with OA. Motor function was measured with the CHOP-INTEND. Findings CHOP-INTEND changes varied among age groups. Baseline score and age at OA treatment best predicted changes. A mixed model post-hoc analysis showed that in patients treated before the age of 24 months the CHOP-INTEND changes were already significant 3 months after OA while in those treated after the age of 24 months the difference was only significant 12 months after OA. Adverse events occurred in 51/67. The risk for elevated transaminases serum levels was higher in older patients. This was also true for weight and for pre-treatment with nusinersen when analysed individually. A binomial negative regression analysis showed that only age at OA treatment had a significant effect on the risk of elevated transaminases. Interpretation Our paper describes OA 12-month follow-up showing efficacy across various age and weight groups not targeted by clinical trials. The study identifies prognostic factors for safety and efficacy in treatment selection. Funding None.
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Affiliation(s)
- Marika Pane
- Paediatric Neurology, Catholic University, Rome, Italy
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Beatrice Berti
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Anna Capasso
- Paediatric Neurology, Catholic University, Rome, Italy
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Giorgia Coratti
- Paediatric Neurology, Catholic University, Rome, Italy
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Antonio Varone
- Department of Neurosciences, Paediatric Neurology, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Adele D’Amico
- Unit of Neuromuscular and Neurodegenerative Disorders, Bambino Gesù Children’s Hospital IRCCS, Rome, Italy
| | - Sonia Messina
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Riccardo Masson
- Fondazione IRCCS Istituto Neurologico Carlo Besta Developmental Neurology Unit, Milan, Italy
| | - Valeria Ada Sansone
- Neurorehabilitation Unit, Centro Clinico Nemo, Niguarda Hospital, University of Milan, Milano, Italy
| | - Maria Alice Donati
- Metabolic and Muscular Unit, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Caterina Agosto
- Dipartimento di Salute della Donna e del Bambino, Università di Padova, Padua, Italy
| | - Claudio Bruno
- Center of Myology and Neurodegenerative Disorders, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Federica Ricci
- AOU Città della Salute e della Scienza di Torino, Presidio OIRM (SC Neuropsichiatria Infantile), Turin, Italy
| | - Antonella Pini
- Neuromuscular Pediatric Unit, IRCCS Istituto delle Scienze Neurologiche di Bologna-UOC Neuropsichiatria dell’Età Pediatrica, Bologna, Italy
| | - Delio Gagliardi
- Pediatric Neurology Unit, Pediatric Hospital "Giovanni XXIII", Bari, Italy
| | - Massimiliano Filosto
- Department of Clinical and Experimental Sciences, NeMO-Brescia Clinical Center for Neuromuscular Diseases, University of Brescia; Brescia, Italy
| | - Stefania Corti
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milan, Milan, Italy
| | - Daniela Leone
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Concetta Palermo
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Roberta Onesimo
- Rare Disease Unit, Pediatric Unit - Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Roberto De Sanctis
- Paediatric Neurology, Catholic University, Rome, Italy
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Martina Ricci
- Paediatric Neurology, Catholic University, Rome, Italy
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Ilaria Bitetti
- Department of Neurosciences, Paediatric Neurology, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Maria Sframeli
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Claudia Dosi
- Fondazione IRCCS Istituto Neurologico Carlo Besta Developmental Neurology Unit, Milan, Italy
| | - Emilio Albamonte
- Neurorehabilitation Unit, Centro Clinico Nemo, Niguarda Hospital, University of Milan, Milano, Italy
| | - Chiara Ticci
- Metabolic and Muscular Unit, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Noemi Brolatti
- Center of Myology and Neurodegenerative Disorders, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Enrico Bertini
- Unit of Neuromuscular and Neurodegenerative Disorders, Bambino Gesù Children’s Hospital IRCCS, Rome, Italy
| | - Richard Finkel
- Department of Paediatric Medicine, Center for Experimental Neurotherapeutics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Eugenio Mercuri
- Paediatric Neurology, Catholic University, Rome, Italy
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
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Antonaci L, Pera MC, Mercuri E. New therapies for spinal muscular atrophy: where we stand and what is next. Eur J Pediatr 2023:10.1007/s00431-023-04883-8. [PMID: 37067602 DOI: 10.1007/s00431-023-04883-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/10/2023] [Accepted: 02/15/2023] [Indexed: 04/18/2023]
Abstract
The natural history of spinal muscular atrophy has been radically changed by the advent of improved standards of care and the availability of disease-modifying therapies. The aim of this paper is to provide the current therapeutic scenario including new perspectives and to report the challenges related to new phenotypes a few years after the therapies have become available. The paper also includes a review of real-world data that provides information on safety and efficacy in individuals that were not included in clinical trials. Special attention is paid to future perspectives both in terms of new drugs that are currently investigated in clinical trials or providing details on current developments in the use of the available drugs, including combination therapies or new modalities of dose or administration. Conclusion: Clinical trials and real world data support the efficacy and safety profiles of the available drugs. At the moment there is not enough published evidence about the superiority of one product compared to the others. What is Known: • Safety and efficacy results of clinical trials have led in the last 6 years to the marketing of three drugs for spinal muscular atrophy, with different mechanisms of action. What is New: • Since the drug's approval, real-world data allow us to have data on bigger and heterogeneous groups of patients in contrast with those included in clinical trials. • In addition to the new molecules, combinations of therapies are currently being evaluated.
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Affiliation(s)
- Laura Antonaci
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | | | - Eugenio Mercuri
- Centro Clinico Nemo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy.
- Pediatric Neurology, Università Cattolica del Sacro Cuore, Rome, Italy.
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AAV vectors applied to the treatment of CNS disorders: Clinical status and challenges. J Control Release 2023; 355:458-473. [PMID: 36736907 DOI: 10.1016/j.jconrel.2023.01.067] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/26/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023]
Abstract
In recent years, adeno-associated virus (AAV) has become the most important vector for central nervous system (CNS) gene therapy. AAV has already shown promising results in the clinic, for several CNS diseases that cannot be treated with drugs, including neurodegenerative diseases, neuromuscular diseases, and lysosomal storage disorders. Currently, three of the four commercially available AAV-based drugs focus on neurological disorders, including Upstaza for aromatic l-amino acid decarboxylase deficiency, Luxturna for hereditary retinal dystrophy, and Zolgensma for spinal muscular atrophy. All these studies have provided paradigms for AAV-based therapeutic intervention platforms. AAV gene therapy, with its dual promise of targeting disease etiology and enabling 'long-term correction' of disease processes, has the advantages of immune privilege, high delivery efficiency, tissue specificity, and cell tropism in the CNS. Although AAV-based gene therapy has been shown to be effective in most CNS clinical trials, limitations have been observed in its clinical applications, which are often associated with side effects. In this review, we summarized the therapeutic progress, challenges, limitations, and solutions for AAV-based gene therapy in 14 types of CNS diseases. We focused on viral vector technologies, delivery routes, immunosuppression, and other relevant clinical factors. We also attempted to integrate several hurdles faced in clinical and preclinical studies with their solutions, to seek the best path forward for the application of AAV-based gene therapy in the context of CNS diseases. We hope that these thoughtful recommendations will contribute to the efficient translation of preclinical studies and wide application of clinical trials.
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Stettner GM, Hasselmann O, Tscherter A, Galiart E, Jacquier D, Klein A. Treatment of spinal muscular atrophy with Onasemnogene Abeparvovec in Switzerland: a prospective observational case series study. BMC Neurol 2023; 23:88. [PMID: 36855136 PMCID: PMC9971686 DOI: 10.1186/s12883-023-03133-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 02/20/2023] [Indexed: 03/02/2023] Open
Abstract
BACKGROUND Spinal muscular atrophy (SMA) is a rare neuromuscular disorder leading to early death in the majority of affected individuals without treatment. Recently, targeted treatment approaches including Onasemnogene Abeparvovec (OA) were introduced. This study describes the first real-world experience with OA in Switzerland. METHODS Prospective observational case series study using data collected within the Swiss Registry for Neuromuscular Disorders from SMA patients treated with OA. Development of motor, bulbar and respiratory function, appearance of scoliosis, and safety data (platelet count, liver function, and cardiotoxicity) were analyzed. RESULTS Nine individuals were treated with OA and followed for 383 ± 126 days: six SMA type 1 (of which two with nusinersen pretreatment), one SMA type 2, and two pre-symptomatic individuals. In SMA type 1, CHOP Intend score increased by 28.1 from a mean score of 20.5 ± 7.6 at baseline. At end of follow-up, 50% of SMA type 1 patients required nutritional support and 17% night-time ventilation; 67% developed scoliosis. The SMA type 2 patient and two pre-symptomatically treated individuals reached maximum CHOP Intend scores. No patient required adaptation of the concomitant prednisolone treatment, although transient decrease of platelet count and increase of transaminases were observed in all patients. Troponin-T was elevated prior to OA treatment in 100% and showed fluctuations in 57% thereafter. CONCLUSIONS OA is a potent treatment for SMA leading to significant motor function improvements. However, the need for respiratory and especially nutritional support as well as the development of scoliosis must be thoroughly evaluated in SMA type 1 patients even in the short term after OA treatment.
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Affiliation(s)
- Georg M. Stettner
- grid.7400.30000 0004 1937 0650Neuromuscular Center Zurich and Department of Pediatric Neurology, University Children’s Hospital Zurich, University of Zurich, Steinwiesstrasse 75, CH-8032 Zurich, Switzerland
| | - Oswald Hasselmann
- grid.414079.f0000 0004 0568 6320Department of Neuropediatrics, Children’s Hospital of Eastern Switzerland, St. Gallen, Switzerland
| | - Anne Tscherter
- grid.5734.50000 0001 0726 5157Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Elea Galiart
- grid.7400.30000 0004 1937 0650Neuromuscular Center Zurich and Department of Pediatric Neurology, University Children’s Hospital Zurich, University of Zurich, Steinwiesstrasse 75, CH-8032 Zurich, Switzerland
| | - David Jacquier
- grid.8515.90000 0001 0423 4662Pediatric Neurology and Neurorehabilitation Unit, Lausanne University Hospital, Lausanne, Switzerland
| | - Andrea Klein
- grid.5734.50000 0001 0726 5157Division of Neuropediatrics, Development and Rehabilitation, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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Yang D, Ruan Y, Chen Y. Safety and efficacy of gene therapy with onasemnogene abeparvovec in the treatment of spinal muscular atrophy: A systematic review and meta-analysis. J Paediatr Child Health 2023; 59:431-438. [PMID: 36722610 DOI: 10.1111/jpc.16340] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 01/01/2023] [Accepted: 01/12/2023] [Indexed: 02/02/2023]
Abstract
Spinal muscular atrophy (SMA) is an autosomal recessive hereditary disease which leads to progressive muscle weakness and atrophy. Our systematic review and meta-analysis aims to explore the efficacy and safety of onasemnogene abeparvovec in SMA patients. We searched PubMed, EMBASE, Web of Science and Cochrane through April 2022. Ten reports enrolling 250 SMA patients were included. CHOP INTEND and motor-milestone significant improvements were detected at both short- and long-term follow-up. Common adverse events included pyrexia, vomiting, thrombocytopenia and elevated aminotransferases. Thrombocytopenia (79.3%, 95%CI: 65.8~90.5) and elevated aminotransferases (71.7%, 95%CI: 62.5~80.1) were more common in SMA patients aged older than 8 months. Despite the paucity of randomized control trial data and low quality of evidence to establish the safety and efficacy of onasemnogene abeparvovec in the treatment of SMA, the data suggest that it is a valuable option for patients with this condition.
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Affiliation(s)
- Dongling Yang
- Ruikang Clinical Medical College, Guangxi University of Chinese Medicine, Nanning, Guangxi, China.,Department of Pediatric Neurology, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Guangxi Clinical Research Center for Pediatric Diseases, Nanning, Guangxi, China
| | - Yiyan Ruan
- Department of Pediatric Neurology, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Guangxi Clinical Research Center for Pediatric Diseases, Nanning, Guangxi, China
| | - Yuyi Chen
- Department of Pediatric Neurology, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Guangxi Clinical Research Center for Pediatric Diseases, Nanning, Guangxi, China
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Pascual-Morena C, Cavero-Redondo I, Lucerón-Lucas-Torres M, Martínez-García I, Rodríguez-Gutiérrez E, Martínez-Vizcaíno V. Onasemnogene Abeparvovec in Type 1 Spinal Muscular Atrophy: A Systematic Review and Meta-Analysis. Hum Gene Ther 2023; 34:129-138. [PMID: 36136906 DOI: 10.1089/hum.2022.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
One of the latest approved therapies for spinal muscular atrophy (SMA) is onasemnogene abeparvovec, which transduces motor neurons with the survival of motor neuron gene. The aim of this meta-analysis was to estimate the effect of onasemnogene abeparvovec on motor function in participants with type 1 SMA. Medline, Web of Science, Scopus, and Cochrane Library were searched for studies published from inception to August 2022. Pre-post clinical trials and observational studies determining the effect of onasemnogene abeparvovec on the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP-INTEND) score or motor milestones (i.e., head control, sit unassisted, feed orally, not use permanent ventilatory support, crawl, stand alone, and walk alone) in participants with type 1 SMA were included. Continuous outcomes (i.e., CHOP-INTEND score) were expressed as pre-post mean difference and 95% confidence interval (CI), while the proportion of participants who achieved >40, >50, and >58/60 points on the CHOP-INTEND and the achievement of the motor milestones were expressed as proportions and 95% CI. A random effects meta-analysis was conducted on each outcome, and the baseline CHOP-INTEND score was considered a covariate. Eleven studies were included in the systematic review, and four were included in the meta-analyses. Onasemnogene abeparvovec improved CHOP-INTEND scores by 11.06 (9.47 to 12.65) and 14.14 (12.42 to 15.86) points at 3 and 6 months postinfusion, respectively. Moreover, 87%, 51%, and 12% achieved CHOP-INTEND scores of >40, >50, and >58/60 points, respectively. However, this proportion increased to 100% in presymptomatic participants with greater baseline CHOP-INTEND. Motor milestones were also improved, especially in presymptomatic participants. Our systematic review not only showed a marked improvement in motor function in type 1 SMA but also showed that treatment in the presymptomatic stage improves the development of these children toward an evolution close to normal for their age.
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Affiliation(s)
| | - Iván Cavero-Redondo
- Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Talca, Chile
| | | | | | | | - Vicente Martínez-Vizcaíno
- Health and Social Research Center, Universidad de Castilla-La Mancha, Cuenca, Spain.,Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Talca, Chile
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Leon-Astudillo C, Byrne BJ, Salloum RG. Addressing the implementation gap in advanced therapeutics for spinal muscular atrophy in the era of newborn screening programs. Front Neurol 2022; 13:1064194. [PMID: 36578307 PMCID: PMC9790909 DOI: 10.3389/fneur.2022.1064194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 11/21/2022] [Indexed: 12/14/2022] Open
Abstract
Spinal muscular atrophy (SMA) is a rare genetic disease that results in progressive neuromuscular weakness. Without therapy, the most common form of the disease, type 1, typically results in death or chronic respiratory failure in the first 2 years of life. Thanks to the recent introduction of newborn screening programs and the discovery of three disease-modifying therapies in the last decade, the outcomes of children with SMA have dramatically improved. Patients are able to achieve many, if not all, of the typical neuromotor milestones, such as sitting, standing and walking, as well as safe oral intake. As the natural history of treated patients is continuously evolving, children with SMA continue to require complex and multidisciplinary care, posing implementation and sustainability challenges. Accordingly, there is a significant need for the application and evaluation of implementation science to address the steps involved in the diagnosis and treatment of patients with SMA, ensuring that all pertinent stakeholders and systems are working effectively to deliver timely and appropriate care. In this manuscript, we discuss the current challenges and gaps in the care for children with SMA, as well as how implementation science can advance this field. In addition, we provide an adapted implementation science framework that includes the main domains and subdomains involved in the care of patients with SMA.
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Affiliation(s)
- Carmen Leon-Astudillo
- Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL, United States,*Correspondence: Carmen Leon-Astudillo
| | - Barry J. Byrne
- Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL, United States
| | - Ramzi G. Salloum
- Department of Health Outcomes and Biomedical Informatics, University of Florida College of Medicine, Gainesville, FL, United States
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Abstract
Onasemnogene abeparvovec (Zolgensma®) is a gene therapy approved for the treatment of spinal muscular atrophy (SMA). Administered as a one-time intravenous infusion, onasemnogene abeparvovec uses the adeno-associated virus vector to deliver a functional copy of the human survival motor neuron (SMN) gene to motor neuron cells. SMN1 encodes survival motor neuron protein, which is responsible for the maintenance and function of motor neurons. In clinical trials, onasemnogene abeparvovec improved event-free survival, motor function and motor milestone outcomes in patients with SMA, with these improvements maintained over the longer term (up to a median of ≈ 5 years). Onasemnogene abeparvovec was also associated with rapid age-appropriate achievement of motor milestones and improvements in motor function in children with pre-symptomatic SMA, indicating the benefit of early treatment. Onasemnogene abeparvovec was generally well tolerated. Hepatotoxicity is a known risk that can generally be mitigated with prophylactic prednisolone. In conclusion, onasemnogene abeparvovec represents an important treatment option for patients with SMA, particularly when initiated early in the course of the disease.
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Affiliation(s)
- Hannah A Blair
- Springer Nature, Private Bag 65901, Mairangi Bay, Auckland, 0754, New Zealand.
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Ramos-Platt L, Elman L, Shieh PB. Experience and Perspectives in the US on the Evolving Treatment Landscape in Spinal Muscular Atrophy. Int J Gen Med 2022; 15:7341-7353. [PMID: 36157294 PMCID: PMC9491367 DOI: 10.2147/ijgm.s369021] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 08/10/2022] [Indexed: 12/02/2022] Open
Abstract
Spinal muscular atrophy (SMA) is a rare, progressive neuromuscular disorder that, until recently, was the most common inherited cause of infant mortality. Since 2016, three disease-modifying therapies have emerged, nusinersen, onasemnogene abeparvovec-xioi, and risdiplam, leading to a transformation in the SMA treatment landscape, changes in disease trajectories, and a profound impact on clinical care. This environment poses a challenge to making informed treatment decisions, including initial treatment choice, treatment changes, and potential use of combination therapies as new data emerge. To better understand factors that influence physician-patient decision-making, a roundtable discussion was convened by Biogen (sponsor) with a panel of four US SMA experts. This report shares the panel’s opinions and clinical experiences, with the goals of helping clinicians and people with SMA and their families to better understand the factors influencing real-world treatment decisions and stimulating a broader discussion in the SMA community. The panelists highlighted that patients are often heavily involved in treatment decisions, and physicians must be aware of current data to guide patients in making the best decisions. Thus, in the absence of data from head-to-head treatment comparisons, physicians’ roles include reviewing treatment options and describing what is known of the benefits, challenges, and potential side effects of each therapy with patients and families. For infants and young children, the panelists expressed a sense of urgency for early intervention to minimize motor function loss, whereas the goal for adults is long-term disease stabilization. In the panelists’ experience, factors that influence patients’ decisions to change to an alternative therapy include convenience, administration route, novelty of therapy, and hope for improved function, while reasons for returning to a previous therapy include a perception of decreased efficacy and side effects. Ongoing clinical trials and analyses of real-world experiences should further inform treatment decisions and optimize patient outcomes.
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Affiliation(s)
- Leigh Ramos-Platt
- Department of Pediatrics, Keck School of Medicine, University of Southern California and Children’s Hospital of Los Angeles, Los Angeles, CA, USA
| | - Lauren Elman
- Department of Neurology, University of Pennsylvania, Philadelphia, PA, USA
| | - Perry B Shieh
- Department of Neurology and Pediatrics, University of California Los Angeles, Los Angeles, CA, USA
- Correspondence: Perry B Shieh, Department of Neurology and Pediatrics, University of California Los Angeles, Los Angeles, CA, USA, Email
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Panagiotou P, Kanaka-Gantenbein C, Kaditis AG. Changes in Ventilatory Support Requirements of Spinal Muscular Atrophy (SMA) Patients Post Gene-Based Therapies. CHILDREN (BASEL, SWITZERLAND) 2022; 9:children9081207. [PMID: 36010097 PMCID: PMC9406975 DOI: 10.3390/children9081207] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 06/10/2023]
Abstract
Spinal muscular atrophy (SMA) is a genetic neuromuscular disease resulting in global muscular weakness and, frequently, in respiratory failure and premature death. Gene-based therapies like Nusinersen are now available for patients with SMA. The aim of this review was to assess in "real world" studies, whether novel treatments would have a positive impact on the mechanical ventilatory support requirements of SMA patients, already initiated on ventilatory support prior to treatment administration. A literature search was performed in Pubmed using multiple combinations of MESH terms and the snowball procedure. A total of 14 publications were discussed in this review. Considering all patients included in the published studies who were on ventilatory support and were treated with Nusinersen, 13/172 (7.5%) had reduced needs for ventilatory support, 1/172 (0.6%) did not need ventilation post-treatment, and 122/172 (70.9%) were maintained on the same ventilator settings. Moreover, 2/41 (4.9%) children who were offered gene therapy had no need for further ventilatory support and 12/41 (29.2%) had reduced requirements. In conclusion, available evidence suggests that among children with SMA, who are on mechanical respiratory support either noninvasively or via tracheostomy at the time of gene-based treatment, only a few will be weaned off the ventilator or have reduced ventilator needs per 24 h. Children will usually require the same level of support as before treatment.
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Affiliation(s)
- Panagiota Panagiotou
- Department on Pediatric Respiratory Medicine, Evelina London Children’s Hospital, London SE1 7EH, UK
- Division of Pediatric Pulmonology and Sleep Disorders Laboratory, First Department of Pediatrics, Agia Sofia Children’s Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Christina Kanaka-Gantenbein
- Division of Pediatric Pulmonology and Sleep Disorders Laboratory, First Department of Pediatrics, Agia Sofia Children’s Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Athanasios G. Kaditis
- Division of Pediatric Pulmonology and Sleep Disorders Laboratory, First Department of Pediatrics, Agia Sofia Children’s Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
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Onasemnogene abeparvovec for spinal muscular atrophy. Aust Prescr 2022; 45:140-141. [PMID: 36110172 PMCID: PMC9427620 DOI: 10.18773/austprescr.2022.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Strauss KA, Farrar MA, Muntoni F, Saito K, Mendell JR, Servais L, McMillan HJ, Finkel RS, Swoboda KJ, Kwon JM, Zaidman CM, Chiriboga CA, Iannaccone ST, Krueger JM, Parsons JA, Shieh PB, Kavanagh S, Wigderson M, Tauscher-Wisniewski S, McGill BE, Macek TA. Onasemnogene abeparvovec for presymptomatic infants with three copies of SMN2 at risk for spinal muscular atrophy: the Phase III SPR1NT trial. Nat Med 2022; 28:1390-1397. [PMID: 35715567 PMCID: PMC9205287 DOI: 10.1038/s41591-022-01867-3] [Citation(s) in RCA: 115] [Impact Index Per Article: 57.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 05/10/2022] [Indexed: 11/12/2022]
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.
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Affiliation(s)
- Kevin A Strauss
- Clinic for Special Children, Strasburg, PA, USA.
- Penn Medicine-Lancaster General Hospital, Lancaster, PA, USA.
- Departments of Pediatrics and Molecular, Cell & Cancer Biology, University of Massachusetts School of Medicine, Worcester, MA, USA.
| | - Michelle A Farrar
- Department of Neurology, Sydney Children's Hospital Network, Sydney, NSW, Australia
- School of Clinical Medicine, UNSW Medicine and Health, UNSW Sydney, Sydney, NSW, Australia
| | - Francesco Muntoni
- 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
| | - Kayoko Saito
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan
| | - Jerry R Mendell
- 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
| | - Laurent Servais
- Department of Paediatrics, MDUK Oxford Neuromuscular Centre, Oxford, UK
- Neuromuscular Reference Center, Department of Pediatrics, CHU & University of Liège, Liège, Belgium
| | - Hugh J McMillan
- Department of Pediatrics, Neurology & Neurosurgery, Montreal Children's Hospital, McGill University, Montreal, QC, Canada
| | - Richard S Finkel
- Department of Pediatrics, Nemours Children's Hospital, Orlando, FL, USA
- Center for Experimental Neurotherapeutics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Kathryn J Swoboda
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
| | - Jennifer M Kwon
- Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Craig M Zaidman
- Washington University School of Medicine, St. Louis, MO, USA
| | - Claudia A Chiriboga
- Division of Pediatric Neurology, Columbia University Medical Center, New York, NY, USA
| | - Susan T Iannaccone
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jena M Krueger
- Department of Neurology, Helen DeVos Children's Hospital, Grand Rapids, MI, USA
| | - Julie A Parsons
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Perry B Shieh
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | | | | | | | - Bryan E McGill
- Translational Medicine, Novartis Institutes for BioMedical Research, Cambridge, MA, USA
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Hjartarson HT, Nathorst-Böös K, Sejersen T. Disease Modifying Therapies for the Management of Children with Spinal Muscular Atrophy (5q SMA): An Update on the Emerging Evidence. Drug Des Devel Ther 2022; 16:1865-1883. [PMID: 35734367 PMCID: PMC9208376 DOI: 10.2147/dddt.s214174] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 06/01/2022] [Indexed: 11/23/2022] Open
Abstract
SMA (5q SMA) is an autosomal recessive neuromuscular disease with an estimated incidence of approximately 1 in 11,000 live births, characterized by progressive degeneration and loss of α-motor neurons in the spinal cord and brain stem, resulting in progressive muscle weakness. The disease spectrum is wide, from a serious congenital to a mild adult-onset disease. SMA is caused by biallelic mutations in the SMN1 gene and disease severity is modified primarily by SMN2 copy number. Before the advent of specific disease altering treatments, SMA was the second most common fatal autosomal recessive disorder after cystic fibrosis and the most common genetic cause of infant mortality. Nusinersen, risdiplam, and onasemnogene abeparvovec are presently the only approved disease modifying therapies for SMA, and the aim of this review is to discuss their mode of action, effects, safety concerns, and results from real-world experience. All exert their action by increasing the level of SMN protein in lower motor neuron. Nusinersen and risdiplam by modifying the SMN2 gene product, and onasemnogene abeparvovec by delivering SMN1 gene copies into cells. All have an established clinical efficacy. An important feature shared by all three is that early intervention is associated with a better treatment outcome, such that in cases where treatment is initiated in an early pre-symptomatic period, it may result in normal - or almost normal - motor development. Thus, early diagnosis followed by swift initiation of treatment is fundamental for the treatment response and consequently long-term prognosis in SMA type 1, and probably SMA type 2. The same principle similarly applies to the milder phenotypes. All three therapies are relatively novel, with risdiplam being the latest addition. Except for nusinersen, real-world data are still scarce, and long-term data are quite naturally lacking.
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Affiliation(s)
- Helgi Thor Hjartarson
- Department of Neuropediatrics, Astrid Lindgren Children´s Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - Kristofer Nathorst-Böös
- Department of Neuropediatrics, Astrid Lindgren Children´s Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - Thomas Sejersen
- Department of Neuropediatrics, Astrid Lindgren Children´s Hospital, Karolinska University Hospital, Stockholm, Sweden
- Department of Women’s and Children’s Health, Karolinska Institute, Stockholm, Sweden
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McMillan HJ, Proud CM, Farrar MA, Alexander IE, Muntoni F, Servais L. Onasemnogene abeparvovec for the treatment of spinal muscular atrophy. Expert Opin Biol Ther 2022; 22:1075-1090. [PMID: 35437095 DOI: 10.1080/14712598.2022.2066471] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Gene therapy for spinal muscular atrophy (SMA) represents a significant milestone in the treatment of neurologic diseases. SMA is a neurodegenerative disease that results in motor neuron loss because of mutations of the survival motor neuron 1 gene, which directs survival motor neuron (SMN) protein production. Onasemnogene abeparvovec, a one-time gene replacement therapy, delivers a functional transgene to restore SMN protein expression. Onasemnogene abeparvovec has demonstrated improved survival and motor milestone achievements for presymptomatic infants and patients with SMA type 1. AREAS COVERED This expert review describes the current state of gene therapy for SMA, reviews the mechanism of and clinical experience with onasemnogene abeparvovec, explains future efforts to expand applications of gene therapy for SMA, and provides context for developing gene therapy for other conditions. EXPERT OPINION Onasemnogene abeparvovec has demonstrated efficacy in clinical trials and, because of this, is a valuable treatment option for patients with symptomatic infantile SMA and those identified by newborn screening. Gene therapy is still in its infancy, and challenges and uncertainties associated with transgene delivery must be addressed. With ongoing development of vector technology, more specific tissue tropism, reduced "off-target" effects, and an enhanced safety profile will continue to evolve.
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Affiliation(s)
- Hugh J McMillan
- Departments of Pediatrics, Neurology & Neurosurgery, Montreal Children's Hospital, McGill University Health Centre, Montreal, Canada
| | - Crystal M Proud
- Children's Hospital of The King's Daughters, Norfolk, VA, United States
| | - Michelle A Farrar
- School of Women's and Children's Health, UNSW Medicine, UNSW Sydney.,Sydney Children's Hospital Network, Sydney, Australia
| | - Ian E Alexander
- Gene Therapy Research Unit, Children's Medical Research Institute, Faculty of Medicine and Health, The University of Sydney and Sydney Children's Hospitals Network, Westmead, NSW, Australia.,Discipline of Child and Adolescent Health, Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW, Australia
| | - Francesco Muntoni
- The Dubowitz Neuromuscular Centre, University College London, Great Ormond Street Institute of Child Health London, UK.,NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, University College London, & Great Ormond Street Hospital Trust, London, UK
| | - Laurent Servais
- Department of Pediatrics, Centre Hospitalier Universitaire de Liège & Université de Liège, Liège, Belgium.,MDUK Oxford Neuromuscular Centre, University of Oxford, Oxford, UK
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