Effect of nusinersen on respiratory function in paediatric spinal muscular atrophy types 1-3

© Author(s) (or their employer(s)) 2022. No commercial re-use. See rights and permissions. Published by BMJ..

INTRODUCTION: Nusinersen is used in spinal muscular atrophy (SMA) to improve peripheral muscle function; however, respiratory effects are largely unknown.

AIM: To assess the effects of nusinersen on respiratory function in paediatric SMA during first year of treatment.

METHODS: A prospective observational study in paediatric patients with SMA who began receiving nusinersen in Queensland, Australia, from June 2018 to December 2019. Outcomes assessed were the age-appropriate respiratory investigations: spirometry, oscillometry, sniff nasal inspiratory pressure, mean inspiratory pressure, mean expiratory pressure, lung clearance index, as well as polysomnography (PSG) and muscle function testing. Lung function was collected retrospectively for up to 2 years prior to nusinersen initiation. Change in lung function was assessed using mixed effects linear regression models, while PSG and muscle function were compared using the Wilcoxon signed-rank test.

RESULTS: Twenty-eight patients (15 male, aged 0.08-18.58 years) were enrolled: type 1 (n=7); type 2 (n=12); type 3 (n=9). The annual rate of decline in FVC z-score prior to nusinersen initiation was -0.58 (95% CI -0.75 to -0.41), and post initiation was -0.25 (95% CI -0.46 to -0.03), with a significant difference in rate of decline (0.33 (95% CI 0.02 to 0.66) (p=0.04)). Most lung function measures were largely unchanged in the year post nusinersen initiation. The total Apnoea-Hypopnoea Index (AHI) was reduced from a median of 5.5 events/hour (IQR 2.1-10.1) at initiation to 2.7 events/hour (IQR 0.7-5.3) after 1 year (p=0.02). All SMA type 1% and 75% of SMA types 2 and 3 had pre-defined peripheral muscle response to nusinersen.

CONCLUSION: The first year of nusinersen treatment saw reduced lung function decline (especially in type 2) and improvement in AHI.

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:77

Enthalten in:

Thorax - 77(2022), 1 vom: 11. Jan., Seite 40-46

Sprache:

Englisch

Beteiligte Personen:

Chacko, Archana [VerfasserIn]
Sly, Peter D [VerfasserIn]
Ware, Robert S [VerfasserIn]
Begum, Nelufa [VerfasserIn]
Deegan, Sean [VerfasserIn]
Thomas, Nicole [VerfasserIn]
Gauld, Leanne M [VerfasserIn]

Links:

Volltext

Themen:

5Z9SP3X666
Journal Article
Nusinersen
Observational Study
Oligonucleotides
Paediatric lung disaese
Paediatric physician
Rare lung diseases
Research Support, Non-U.S. Gov't
Respiratory measurement
Respiratory muscles

Anmerkungen:

Date Completed 02.02.2022

Date Revised 02.02.2022

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1136/thoraxjnl-2020-216564

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM325148538