Abstract
To evaluate the effect of SMN2 copy number on disease severity in spinal muscular atrophy (SMA), we stratified 45 adult SMA patients based on SMN2 copy number (3 vs. 4 copies). Patients with 3 copies had an earlier age of onset and lower spinal muscular atrophy functional rating scale (SMAFRS) scores and were more likely to be non-ambulatory. There was, however, no difference between the groups in quantitative muscle strength or pulmonary function testing. Functional scale may be a more discriminating outcome measure for SMA clinical trials.
Original language | English (US) |
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Pages (from-to) | 652-656 |
Number of pages | 5 |
Journal | Muscle and Nerve |
Volume | 40 |
Issue number | 4 |
DOIs | |
State | Published - Oct 2009 |
Keywords
- MVIC
- Motor neuron
- SMA
- SMAFRS
- SMN2 copy number
ASJC Scopus subject areas
- Physiology
- Clinical Neurology
- Cellular and Molecular Neuroscience
- Physiology (medical)