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Zreibe K, Kanner CH, Uher D, Beard G, Patterson M, Harris M, Doerger J, Calamia S, Chung WK, Montes J. Characterizing ambulatory function in children with PPP2R5D-related neurodevelopmental disorder. Gait Posture 2024; 110:77-83. [PMID: 38547676 PMCID: PMC11056288 DOI: 10.1016/j.gaitpost.2024.03.012] [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: 09/22/2023] [Revised: 01/29/2024] [Accepted: 03/22/2024] [Indexed: 04/14/2024]
Abstract
BACKGROUND Individuals with PPP2R5D-related neurodevelopmental disorder have an atypical gait pattern characterized by ataxia and incoordination. Structured, quantitative assessments are needed to further understand the impact of these impairments on function. RESEARCH QUESTION How do gait parameters and ambulatory function of individuals with PPP2R5D-related neurodevelopmental disorder compare to age and sex matched healthy norms? METHODS Twenty-six individuals with PPP2R5D pathogenic genetic variants participated in this observational, single visit study. Participants completed at least one of the following gait assessments: quantitative gait analysis at three different speeds (preferred pace walking (PPW), fast paced walking (FPW) and running, six-minute walk test (6MWT), 10-meter walk run (10MWR), and timed up and go (TUG). Descriptive statistics were used to summarize gait variables. Percent of predicted values were calculated using published norms. Paired t-tests and regression analyses were used to compare gait variables. RESULTS The median age of the participants was 8 years (range 4-27) and eighteen (69.2 %) were female. Individuals with PPP2R5D-related neurodevelopmental disorder walked slower and with a wider base of support than predicted for their age and sex. Stride velocity ranged from 48.9 % to 70.1 % and stride distance from 58.5 % to 81.9 % of predicted during PPW. Percent of predicted distance walked on the 6MWT ranged from 30.6 % to 71.1 % representing varied walking impairment. Increases in stride distance, not cadence, were associated with changes in stride velocity in FPW (R2 = 0.675, p =< 0.001) and running conditions (R2 = 0.918, p =< 0.001). SIGNIFICANCE We quantitatively assessed the abnormal gait in individuals with PPP2R5D-related neurodevelopmental disorder. These impairments may affect ability to adapt to environmental changes and participation in daily life. Rehabilitative interventions targeting gait speed and balance may improve function and safety for individuals with PPP2R5D-related neurodevelopmental disorder.
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Affiliation(s)
- Kyle Zreibe
- Department of Rehabilitation, UHealth-Jackson Holtz Children's Hospital, Miami, FL, USA; Department of Rehabilitation & Regenerative Medicine, Columbia University Irving Medical Center, New York, NY, USA.
| | - Cara H Kanner
- Department of Rehabilitation & Regenerative Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - David Uher
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, USA
| | - Gabriella Beard
- Department of Rehabilitation & Regenerative Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Madison Patterson
- Department of Rehabilitation & Regenerative Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Matthew Harris
- Department of Rehabilitation & Regenerative Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Jerome Doerger
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Sean Calamia
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Wendy K Chung
- Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, MA USA
| | - Jacqueline Montes
- Department of Rehabilitation & Regenerative Medicine, Columbia University Irving Medical Center, New York, NY, USA
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Dosi C, Masson R. The impact of three SMN2 gene copies on clinical characteristics and effect of disease-modifying treatment in patients with spinal muscular atrophy: a systematic literature review. Front Neurol 2024; 15:1308296. [PMID: 38487326 PMCID: PMC10937544 DOI: 10.3389/fneur.2024.1308296] [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: 10/06/2023] [Accepted: 02/12/2024] [Indexed: 03/17/2024] Open
Abstract
Objective To review the clinical characteristics and effect of treatment in patients with spinal muscular atrophy (SMA) and three copies of the SMN2 gene. Methods We conducted a literature search in October 2022 to identify English-language clinical research on SMA that included SMN2 copy number according to PRISMA guidelines. Results Our search identified 44 studies examining the impact of three SMN2 copies on clinical characteristics (21 on phenotype, 13 on natural history, and 15 on functional status and other signs/symptoms). In children with type I SMA or presymptomatic infants with an SMN1 deletion, three SMN2 copies was associated with later symptom onset, slower decline in motor function and longer survival compared with two SMN2 copies. In patients with SMA type II or III, three SMN2 copies is associated with earlier symptom onset, loss of ambulation, and ventilator dependence compared with four SMN2 copies. Eleven studies examined treatment effects with nusinersen (nine studies), onasemnogene abeparvovec (one study), and a range of treatments (one study) in patients with three SMN2 copies. In presymptomatic infants, early treatment delayed the onset of symptoms and maintained motor function in those with three SMN2 copies. The impact of copy number on treatment response in symptomatic patients is still unclear. Conclusion SMN2 copy number is strongly correlated with SMA phenotype in patients with SMN1 deletion, while no correlation was found in patients with an SMN1 mutation. Patients with three SMN2 copies show a highly variable clinical phenotype. Early initiation of treatment is highly effective in presymptomatic patients with three SMN2 copies.
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Affiliation(s)
| | - Riccardo Masson
- Fondazione IRCCS Istituto Neurologico Carlo Besta, Developmental Neurology Unit, Milan, Italy
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Kanner CH, Uher D, Zreibe K, Beard G, Patterson M, Harris M, Doerger J, Calamia S, Chung WK, Montes J. Validation of a modified version of the gross motor function measure in PPPR5D related neurodevelopmental disorder. Orphanet J Rare Dis 2024; 19:45. [PMID: 38326877 PMCID: PMC10848481 DOI: 10.1186/s13023-024-03067-3] [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: 09/19/2023] [Accepted: 02/03/2024] [Indexed: 02/09/2024] Open
Abstract
BACKGROUND Protein phosphatase 2 regulatory subunit B' Delta (PPP2R5D)-related neurodevelopmental disorder is a rare genetic condition caused by pathogenic variants in the PPP2R5D gene. Clinical signs include hypotonia, gross motor delay, intellectual disability (ID), epilepsy, speech delays, and abnormal gait among other impairments. As this disorder was recognized within the last decade, there are only 103 people published diagnoses to date. A thorough understanding of the motor manifestations of this disorder has not yet been established. Knowledge of the natural history of PPP2R5D related neurodevelopmental disorder will lead to improved standard of care treatments as well as serve as a baseline foundation for future clinical trials. Appropriate outcome measures are necessary for use in clinical trials to uniformly measure function and monitor potential for change. The aim of this study was to validate the gross motor function measure (GMFM) in children and adults with PPP2R5D-related neurodevelopmental disorder in order to better characterize the disorder. RESULTS Thirty-eight individuals with PPP2R5D pathogenic variants, median age 8.0 years (range 1-27) were evaluated. Gross motor, upper limb and ambulatory function were assessed using the GMFM-66, six-minute walk test (6MWT), 10-meter walk run (10MWR), timed up and go (TUG), and revised upper limb module (RULM). The pediatric disability inventory computer adapted test (PEDI-CAT) captured caregiver reported assessment. Median GMFM-66 score was 60.6 (SD = 17.3, range 21.1-96.0). There were strong associations between the GMFM-66 and related mobility measures, 10MWR (rs = -0.733; p < 0.001), TUG (rs= -0.747; p = 0.003), 6MWT (r = 0.633; p = 0.006), RULM (r = 0.763; p < 0.001), PEDICAT-mobility (r = 0.855; p < 0.001), and daily activities (r = 0.822; p < 0.001) domains. CONCLUSIONS The GMFM is a valid measure for characterizing motor function in individuals with PPP2R5D related neurodevelopmental disorder. The GMFM-66 had strong associations with the RULM and timed function tests which characterized gross motor, upper limb and ambulatory function demonstrating concurrent validity. The GMFM-66 was also able to differentiate between functional levels in PPP2R5D related neurodevelopmental disorder demonstrating discriminant validity. Future studies should examine its sensitivity to change over time, ability to identify sub-phenotypes, and suitability as an outcome measure in future clinical trials in individuals with PPP2R5D variants.
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Affiliation(s)
- Cara H Kanner
- Department of Rehabilitation and Regenerative Medicine, Columbia University Irving Medical Center, 617 West 168th Street, New York, NY, 10032, USA.
| | - David Uher
- Department of Rehabilitation and Regenerative Medicine, Columbia University Irving Medical Center, 617 West 168th Street, New York, NY, 10032, USA
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, USA
| | - Kyle Zreibe
- Department of Rehabilitation, UHealth-Jackson Holtz Children's Hospital, Miami, FL, USA
| | - Gabriella Beard
- Department of Rehabilitation and Regenerative Medicine, Columbia University Irving Medical Center, 617 West 168th Street, New York, NY, 10032, USA
| | - Madison Patterson
- Department of Rehabilitation and Regenerative Medicine, Columbia University Irving Medical Center, 617 West 168th Street, New York, NY, 10032, USA
| | - Matthew Harris
- Department of Rehabilitation and Regenerative Medicine, Columbia University Irving Medical Center, 617 West 168th Street, New York, NY, 10032, USA
| | - Jerome Doerger
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Sean Calamia
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Wendy K Chung
- Department of Pediatrics, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA
| | - Jacqueline Montes
- Department of Rehabilitation and Regenerative Medicine, Columbia University Irving Medical Center, 617 West 168th Street, New York, NY, 10032, USA
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Salort-Campana E, Solé G, Magot A, Tard C, Noury JB, Behin A, De La Cruz E, Boyer F, Lefeuvre C, Masingue M, Debergé L, Finet A, Brison M, Spinazzi M, Pegat A, Sacconi S, Malfatti E, Choumert A, Bellance R, Bedat-Millet AL, Feasson L, Vuillerot C, Jacquin-Piques A, Michaud M, Pereon Y, Stojkovic T, Laforêt P, Attarian S, Cintas P. Multidisciplinary team meetings in treatment of spinal muscular atrophy adult patients: a real-life observatory for innovative treatments. Orphanet J Rare Dis 2024; 19:24. [PMID: 38268028 PMCID: PMC10809505 DOI: 10.1186/s13023-023-03008-6] [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: 08/13/2023] [Accepted: 12/19/2023] [Indexed: 01/26/2024] Open
Abstract
BACKGROUND In 2017, a new treatment by nusinersen, an antisense oligonucleotide delivered by repeated intrathecal injections, became available for patients with spinal muscular atrophy (SMA), whereas clinical trials had mainly involved children. Since 2020, the oral, selective SMN2-splicing modifier risdiplam has been available with restrictions evolving with time. In this peculiar context of lack of data regarding adult patients, many questions were raised to define the indications of treatment and the appropriate follow-up in this population. To homogenize access to treatment in France, a national multidisciplinary team meeting dedicated to adult SMA patients, named SMA multidisciplinary team meeting, (SMDTs) was created in 2018. Our objective was to analyze the value of SMDTs in the decision-making process in SMA adult patients and to provide guidelines about treatment. METHODS From October 2020 to September 2021, data extracted from the SMDT reports were collected. The primary outcome was the percentage of cases in which recommendations on validating treatment plans were given. The secondary outcomes were type of treatment requested, description of expectations regarding treatment and description of recommendations or follow-up and discontinuation. Data were analyzed using descriptive statistics. Comparisons between the type of treatment requested were performed using Mann-Whitney test or the Student t test for quantitative data and the Fisher's exact test or the χ2 test for qualitative data. RESULTS Cases of 107 patients were discussed at the SMDTs with a mean age of 35.3 (16-62). Forty-seven were SMA type 2, and 57 SMA type 3. Twelve cases were presented twice. Out of 122 presentations to the SMDTs, most of requests related to the initiation of a treatment (nusinersen (n = 46), risdiplam (n = 54), treatment without mentioning preferred choice (n = 5)) or a switch of treatment (n = 12). Risdiplam requests concerned significantly older patients (p = 0.002), mostly SMA type 2 (p < 0.0001), with greater disease severity in terms of motor and respiratory function compared to requests for nusinersen. In the year prior to presentation to the SMDTs, most of the patients experienced worsening of motor weakness assessed by functional tests as MFM32 or other meaningful scales for the most severe patients. Only 12% of the patients discussed had a stable condition. Only 49/122 patients (40.1%) expressed clear expectations regarding treatment. The treatment requested was approved by the SMDTs in 72 patients (67.2%). The most common reasons to decline treatment were lack of objective data on the disease course prior discussion to the SMDTs or inappropriate patient's expectations. Treatment requests were more likely to be validated by the SMDTs if sufficient pre-therapeutic functional assessment had been performed to assess the natural history (55% vs. 32%) and if the patient had worsening rather than stable motor function (p = 0.029). In patients with approved treatment, a-priori criteria to define a further ineffectiveness of treatment (usually after 14 months of treatment) were proposed for 67/72 patients. CONCLUSIONS In the context of costly treatments with few controlled studies in adults with SMA, in whom assessment of efficacy can be complex, SMDTs are 'real-world observatories' of great interest to establish national recommendations about indications of treatment and follow-up.
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Affiliation(s)
- Emmanuelle Salort-Campana
- Service de Neurologie du Pr Attarian, Centre de Référence des Maladies Neuromusculaires PACA Réunion Rhône Alpes, Timone University Hospital, Aix-Marseille University, 264 Rue Saint-Pierre, 13385, Marseille Cedex 05, France.
- Inserm UMR_S 910 Medical Genetics and Functional Genomics, Aix Marseille Université, Marseille, France.
- FILNEMUS, Marseille, France.
| | - Guilhem Solé
- Centre de Référence des Maladies Neuromusculaires AOC, Hôpital Pellegrin, CHU de Bordeaux, Bordeaux, France
- FILNEMUS, Marseille, France
| | - Armelle Magot
- Laboratoire d'Explorations Fonctionnelles, Hôtel-Dieu, Centre de Référence des Maladies Neuromusculaires AOC, CHU de Nantes, Nantes, France
- FILNEMUS, Marseille, France
| | - Céline Tard
- Centre de Référence des Maladies Neuromusculaires Nord Est Ile de France, Lille, France
- FILNEMUS, Marseille, France
| | - Jean-Baptiste Noury
- Reference Centre for Neuromuscular Diseases AOC, University Hospital of Brest, Brest, France
- FILNEMUS, Marseille, France
| | - Anthony Behin
- Centre de Référence des Maladies Neuromusculaires Nord/Est/Île-de-France, Institut de Myologie, Hôpital Pitié-Salpêtrière, AP-HP, Paris, France
- FILNEMUS, Marseille, France
| | - Elisa De La Cruz
- Centre de Référence des Maladies Neuromusculaires AOC, CHU et Université de Montpellier, Montpellier, France
- UVSQ, Paris-Saclay University, Paris, France
| | - François Boyer
- Pôle de Médecine Physique et de Réadaptation, Hôpital Universitaire Reims-Champagne-Ardenne, CHU Sébastopol, Centre de Référence des Maladies Neuromusculaires Nord Est Ile de France, Reims, France
- FILNEMUS, Marseille, France
| | - Claire Lefeuvre
- Nord-Est-Ile-de-France, Service de Neurologie, FHU Phenix, Centre de Référence de Pathologie Neuromusculaire, Raymond Poincaré University Hospital, Garches, APHP, Garches, France
- FILNEMUS, Marseille, France
| | - Marion Masingue
- Centre de Référence des Maladies Neuromusculaires Nord/Est/Île-de-France, Institut de Myologie, Hôpital Pitié-Salpêtrière, AP-HP, Paris, France
- FILNEMUS, Marseille, France
| | - Louise Debergé
- Centre de Référence des Maladies Neuromusculaires AOC, Hôpital Pellegrin, CHU de Bordeaux, Bordeaux, France
- FILNEMUS, Marseille, France
| | - Armelle Finet
- Service de Neurologie du Pr Attarian, Centre de Référence des Maladies Neuromusculaires PACA Réunion Rhône Alpes, Timone University Hospital, Aix-Marseille University, 264 Rue Saint-Pierre, 13385, Marseille Cedex 05, France
- FILNEMUS, Marseille, France
| | - Mélanie Brison
- Centre de Réference des Maladies Neuromusculaires PACA Réunion Rhône Alpes Service de Neurologie, CHU de Saint-Etienne, Saint-Étienne, France
- FILNEMUS, Marseille, France
| | - Marco Spinazzi
- Department of Neurology, Centre Hospitalier Universitaire d'Angers, Angers, France
- FILNEMUS, Marseille, France
| | - Antoine Pegat
- Service de Neurologie C, Hospices Civils de Lyon, Hôpital Neurologique Pierre Wertheimer, 69500, Bron, France
- Service d'Explorations Fonctionnelles Neurologiques, Hôpital Neurologique Pierre Wertheimer, 69500, Bron, France
- FILNEMUS, Marseille, France
| | - Sabrina Sacconi
- Service Système Nerveux Périphérique & Muscle, Centre de Référence des Maladies Neuromusculaires PACA Réunion Rhône Alpes, Centre Hospitalier Universitaire de Nice, Université Côte d'Azur, Nice, France
- FILNEMUS, Marseille, France
| | - Edoardo Malfatti
- APHP, Centre de Référence de Pathologie Neuromusculaire Nord-Est-Ile-de-France, Henri Mondor Hospital, University Paris-Est, Créteil, France
- FILNEMUS, Marseille, France
| | - Ariane Choumert
- Department of Rare Neurological Diseases, Centre de Référence des Maladies Neuromusculaires PACA Réunion Rhône Alpes, CHU de la Réunion, Saint-Pierre, France
- FILNEMUS, Marseille, France
| | - Rémi Bellance
- CeRCa, Site Constitutif de Centre de Référence Caribéen des Maladies Neuromusculaires Rares, CHU de Martinique, Hôpital P. Zobda-Quitman, Fort-de-France, France
- FILNEMUS, Marseille, France
| | | | - Léonard Feasson
- Physiology and Exercise Laboratory EA4338, Centre de Référence des Maladies Neuromusculaires PACA Réunion Rhône Alpes, Rhône-Alpes Bellevue Hospital, University Hospital Center of Saint-Étienne, Saint-Étienne, France
- FILNEMUS, Marseille, France
| | - Carole Vuillerot
- Service de Médecine Physique et Réadaptation Pédiatrique, Hôpital Femme Mère Enfant, Hospices Civils de Lyon, 69677, Bron Cedex, France
- FILNEMUS, Marseille, France
| | - Agnès Jacquin-Piques
- Department of Clinical Neurophysiology, CHU Dijon Bourgogne, Dijon, France
- FILNEMUS, Marseille, France
| | - Maud Michaud
- Department of Neurology, Nancy University Hospital, Nancy, France
- FILNEMUS, Marseille, France
| | - Yann Pereon
- Laboratoire d'Explorations Fonctionnelles, Hôtel-Dieu, Centre de Référence des Maladies Neuromusculaires AOC, CHU de Nantes, Nantes, France
- FILNEMUS, Marseille, France
| | - Tanya Stojkovic
- Centre de Référence des Maladies Neuromusculaires Nord/Est/Île-de-France, Institut de Myologie, Hôpital Pitié-Salpêtrière, AP-HP, Paris, France
- FILNEMUS, Marseille, France
| | - Pascal Laforêt
- Nord-Est-Ile-de-France, Service de Neurologie, FHU Phenix, Centre de Référence de Pathologie Neuromusculaire, Raymond Poincaré University Hospital, Garches, APHP, Garches, France
- UVSQ, Paris-Saclay University, Paris, France
- FILNEMUS, Marseille, France
| | - Shahram Attarian
- Service de Neurologie du Pr Attarian, Centre de Référence des Maladies Neuromusculaires PACA Réunion Rhône Alpes, Timone University Hospital, Aix-Marseille University, 264 Rue Saint-Pierre, 13385, Marseille Cedex 05, France
- Inserm UMR_S 910 Medical Genetics and Functional Genomics, Aix Marseille Université, Marseille, France
- FILNEMUS, Marseille, France
| | - Pascal Cintas
- Service de Neurologie, CHU de Toulouse Purpan, Place du Docteur Baylac TSA 40031, 8. Centre de Référence des Maladies Neuromusculaires AOC, 31059, Toulouse Cedex 9, France
- FILNEMUS, Marseille, France
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Ricci G, Torri F, Govoni A, Chiappini R, Manca L, Vadi G, Roccella S, Magri F, Meneri M, Fassini F, Vacchiano V, Tomassini S, Gironella N, Coccia M, Comi G, Liguori R, Siciliano G. Proposal of a new clinical protocol for evaluating fatigability in adult SMA patients. ACTA MYOLOGICA : MYOPATHIES AND CARDIOMYOPATHIES : OFFICIAL JOURNAL OF THE MEDITERRANEAN SOCIETY OF MYOLOGY 2023; 42:65-70. [PMID: 38090548 PMCID: PMC10712654 DOI: 10.36185/2532-1900-330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 09/28/2023] [Indexed: 12/18/2023]
Abstract
Objective Spinal Muscular Atrophy (SMA) is a genetic neuromuscular disease affecting the lower motor neuron, carrying a significant burden on patients' general motor skills and quality of life, characterized by a great variability in phenotypic expression. As new therapeutic options make their appearance on the scene, sensitive clinical tools and outcome measures are needed, especially in adult patients undergoing treatment, in which the expected clinical response is a mild improvement or stabilization of disease progression. Methods Here, we describe a new functional motor scale specifically designed for evaluating the endurance dimension for the upper and lower limbs in adult SMA patients. Results The scale was first tested in eight control healthy subjects and then validated in ten adult SMA patients, proving intra- and inter-observer reliability. We also set up an evaluation protocol by using wearable devices including surface EMG and accelerometer. Conclusions The endurance evaluation should integrate the standard clinical monitoring in the management and follow-up of SMA adult patients.
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Affiliation(s)
- Giulia Ricci
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Francesca Torri
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Alessandra Govoni
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Roberto Chiappini
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Laura Manca
- Department of Mathematics, University of Pisa, Pisa, Italy
| | - Gabriele Vadi
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Stefano Roccella
- The Biorobotics Institute, Sant’Anna Superior Studies School, Pisa, Italy
| | - Francesca Magri
- Ospedale Maggiore Policlinico; University of Milan, Dpt Neurological Sciences, Milano, Italy
| | - Megi Meneri
- Ospedale Maggiore Policlinico; University of Milan, Dpt Neurological Sciences, Milano, Italy
| | - Federica Fassini
- Ospedale Maggiore Policlinico; University of Milan, Dpt Neurological Sciences, Milano, Italy
| | - Veria Vacchiano
- IRCCS Istituto Delle Scienze Neurologiche di Bologna, Bologna, Italy
| | | | | | | | - Giacomo Comi
- Ospedale Maggiore Policlinico; University of Milan, Dpt Neurological Sciences, Milano, Italy
| | - Rocco Liguori
- IRCCS Istituto Delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Gabriele Siciliano
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
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6
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Krosschell KJ, Brown L, Hoffman K, Zumpf KB, Munson H, Bidwell J, Schulte DP, Schwaede AN, Buehner AN, DiDonato CJ, Kuntz NL, Rao VK. Longitudinal Assessment of Timed Function Tests Over Time in Ambulatory Individuals with SMA Treated with Nusinersen. J Neuromuscul Dis 2023; 10:337-348. [PMID: 36872785 DOI: 10.3233/jnd-221519] [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: 03/06/2023]
Abstract
BACKGROUND Ambulatory individuals with spinal muscular atrophy experience weakness and impairments of speed and endurance. This leads to decreased motor skill performance required for daily living including transitioning from floor to stand, climbing stairs, and traversing short and community distances. Motor function improvements have been reported in individuals receiving nusinersen, but changes in timed functional tests (TFTs) which assess shorter distance walking and transitions have not been well documented. OBJECTIVE To evaluate changes in TFT performance over the course of nusinersen treatment in ambulatory individuals with SMA and identify potential factors [age, SMN2 copy number, BMI, Hammersmith Functional Motor Scale expanded (HFMSE score), Peroneal Compound Motor Action Potential (CMAP) amplitude] associated with TFT performance. METHODS Nineteen ambulatory participants receiving nusinersen were followed from 2017 through 2019 (range: 0-900 days, mean 624.7 days, median 780 days); thirteen of 19 (mean age = 11.5 years) completed TFTs. The 10-meter walk/run test, time-to-rise from supine, time-to-rise from sitting, 4-stair climb, 6-minute walk test (6MWT), Hammersmith-Expanded and peroneal CMAP were assessed at each visit. Linear mixed-effects models were used to evaluate unadjusted and adjusted changes in these outcomes over time. RESULTS Apart from time to rise from sitting and from supine, all TFTs were found to improve over the course of treatment after adjusting for baseline age and BMI. CONCLUSIONS Improvement in TFTs over time in patients with SMA treated with nusinersen suggests that shorter TFTs may have value to assess individuals with SMA who have or later gain ambulatory function during treatment.
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Affiliation(s)
- Kristin J Krosschell
- Department of Physical Therapy and Human Movement Sciences, Northwestern University Feinberg School of Medicine, USA.,Department of Pediatrics, Northwestern University Feinberg School of Medicine, USA
| | - Laurey Brown
- Department of Rehabilitation Services, Ann and Robert H. Lurie Children's Hospital of Chicago, USA.,Division of Neurology, Ann and Robert H. Lurie Children's Hospital of Chicago, USA
| | - Katie Hoffman
- Department of Rehabilitation Services, Ann and Robert H. Lurie Children's Hospital of Chicago, USA.,Division of Neurology, Ann and Robert H. Lurie Children's Hospital of Chicago, USA
| | - Katelyn B Zumpf
- Biostatistics Collaboration Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA- sponsor.,Statistical Consulting, OSF Healthcare, Chicago, IL, USA
| | - Hannah Munson
- Chicago College of Osteopathic Medicine, Midwestern University Downers Grove, IL, USA
| | - Jessa Bidwell
- Graduate Program of Genetic Engineering, Northwestern University, Chicago, IL, USA
| | - Duncan P Schulte
- Division of Neurology, Ann and Robert H. Lurie Children's Hospital of Chicago, USA
| | - Abigail N Schwaede
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, USA.,Division of Neurology, Ann and Robert H. Lurie Children's Hospital of Chicago, USA
| | | | - Christine J DiDonato
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, USA.,Stanley Manne Children's Research Institute, Ann and Robert H. Lurie Children's Hospital of Chicago, USA
| | - Nancy L Kuntz
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, USA.,Division of Neurology, Ann and Robert H. Lurie Children's Hospital of Chicago, USA
| | - Vamshi K Rao
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, USA.,Division of Neurology, Ann and Robert H. Lurie Children's Hospital of Chicago, USA.,Stanley Manne Children's Research Institute, Ann and Robert H. Lurie Children's Hospital of Chicago, USA
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Hu C, Li X, Shi Y, Zhu X, Zhao L, Li W, Zhou S, Wang Y. Comprehensive profile and natural history of pediatric patients with spinal muscular atrophy: A large retrospective study from China. Front Neurol 2022; 13:1038012. [PMID: 36605788 PMCID: PMC9810274 DOI: 10.3389/fneur.2022.1038012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022] Open
Abstract
Background There is a large population of people with spinal muscular atrophy (SMA) in China, and new disease-modifying therapies have become available recently. However, comprehensive data on the management and profile of treatment-naive SMA patients in China are still lacking. Methods As a retrospective study, a large cohort of treatment-naive patients with clinical and genetic diagnoses of 5q SMA were enrolled, ranging from neonatal to 18 years old, from the Neurology Department of Children's Hospital of Fudan University between January 2013 and December 2020. The data regarding their clinical presentations, genetic defects, motor function assessment results, and follow ups were reviewed. Results We enrolled 392 SMA patients (male: female = 189: 203): 1a = 46, 1b = 44, 1c = 31, 2a = 119, 2b = 56, 3a = 52, 3b = 14, from 27 of the 34 administrative districts in China, and 389 patients harbored homozygous deletion of exon 7 in the SMN1 gene (99.2%). The median age of onset was 0.08 (range: 0-0.30), 0.25 (0.06-0.60), 0.42 (0.08-1.50), 0.67 (0.07-5.08), 1.0 (0.40-1.83), 1.5 (1.00-3.00), and 4.04 (1.80-12.00) years old for SMA 1a, 1b, 1c, 2a, 2b, 3a, and 3b patients, while the median age of first assessment was 0.25 (0.08-2.60), 0.42 (0.17-1.90), 0.80 (0.17-4.5), 2.50 (0.5-15.83), 2.92 (1.08-13.42), 4.25 (1.58-17.33), and 7.34 (3.67-14.00) years old, respectively. Patients were followed up with for up to 15.8 years. The median event-free survival time was 7 months, 15 months, and indeterminate in SMA 1a, 1b, and 1c patients (p < 0.0001), with a better survival situation for higher SMN2 copies (p = 0.0171). The median age of sitting loss was 5.75 years and 13.5 years in SMA 2a and 2b (p = 0.0214) and that of ambulation loss was 9.0 years and undefined in SMA 3a and 3b (p = 0.0072). Cox regression analysis showed that higher SMN2 copies indicated better remaining ambulation in SMA 3. The median time to develop orthopedic deformities was 4.5, 5.2, and 10.1 years in SMAs 1c, 2, and 3, respectively (p < 0.0001), with a possible trend of better preservation of joint function for patients under regular rehabilitation (p = 0.8668). Conclusion Our study elucidated insight into the comprehensive management and profile of different types of SMA patients in China, providing a clinical basis for assessing the efficacy of new therapies.
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