Spinal Muscular Atrophy Clinical Trial
Official title:
The Role of Motor Unit Number Estimation (MUNE) in Adults With Spinal Muscular Atrophy (SMA)
The primary objective of this research protocol is to study and follow the course of motor neuron loss in individuals with spinal muscular atrophy (SMA) using the electrophysiological technique of motor unit number estimation (MUNE). This study is based on the hypothesis that the electrophysiological technique of motor unit number estimation (MUNE) and compound muscle action potential (CMAP) provide sensitive indicators to assess the severity and progression of disease in adults with SMA.
This is a prospective pilot study to determine MUNE and CMAP values in a population of adults with SMA, assess how these electrophysiologic parameters change over time, and explore how well these parameters correlates with other outcome measures in SMA, including functional scales (SMAFRS and SF-36) and muscle strength (by MMT, MVICT, 6 minute walk test, time to climb 4 stairs and handheld myometry). The study was started in 2006 with 4 visits. It was initially intended to measure baseline and variability of values at baseline, 6 months, 10-14 months, and 20-24 months to better characterize the disease and to validate measurements as suitable outcome measures to be used in future therapeutic trials on adults. Individuals who do not take nusinersen would continue on this visit plan. With the addition of the FDA approved drug nusinersen for SMA we would like to follow people who are receiving that treatment more frequently. The visits will fall in relationship to their treatment doses. Those patients who are receiving nusinersen will come in at a baseline visit that will be1 to 6 weeks prior to first treatment. Then they would follow-up one to 2.5 weeks after each treatment dosing that happens quarterly after the initial loading dose. There will be 10 visits over 3 years. The visits will occur at baseline, 2, 6, 10, 14, 18, 22, 26, 30, and 34 months. These additional visits will allow for better uniform monitoring of the response to treatment and resubmission to insurance providers. Additional long term data will be collected from interested/available patients every 2-3 years up to a max of fifteen years. Being followed long term would add 4-6 visits over 12 years. If subjects completed the study course in the past and are now starting nusinersen (SPINRAZA), those individuals are able to enroll again. A total of 100 people with SMA will be enrolled in this trial. This will allow for two cohorts of people with SMA; those receiving treatment and those not receiving treatment. Control participants will only come to a baseline visit and the only tests that will be completed are the EMG Measures (MUNE, CMAP, decomposition EMG) and EIM. There will be no further testing for those participants. This visit will take approximately 30-60 minutes. A total of 40 control participants are being recruited for this study. ;
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