Muscular Dystrophies Clinical Trial
Official title:
An Open-label Extension Study of the Long-term Safety, Tolerability and Efficacy of Drisapersen in US and Canadian Subjects With Duchenne Muscular Dystrophy.
This is a phase III, multicenter, open-label, uncontrolled extension study in male subjects with DMD open to eligible US and Canadian subjects who previously participated in the following studies of drisapersen: DMD114876, DMD114044 and DMD114349. Subjects will receive 6mg/kg subcutaneous drisapersen on a weekly basis. For subjects who have previously experienced significant safety or tolerability issues or who experience these during the study, there is the potential of an alternate intermittent dosing arm that will be given as a regimen of 6 mg/kg weekly for 8 weeks followed by 4 weeks off treatment. For subjects who experience or have previously experienced significant safety/tolerability issues, side effects or reactions or intermittent dosing, intravenous dosing will be made available.
In Part A of the study (DMD115501, original protocol), 21 subjects entered the study at 3 US
sites and completed up to 14 weeks of treatment, and up to 22 weeks of follow-up. This
protocol amendment, Part B of the study will include up to 13 more US and Canadian centers,
and up to 51 more subjects. In total the study will enroll approximately 72 subjects. All
subjects will commence Part B at screening and follow the study schedule.
The primary dosing arm is drisapersen 6 mg/kg as SC injection(s) once a week. For subjects
who have previously experienced significant safety or tolerability issues or who experience
these during the study, there is the potential of an alternate intermittent dosing arm that
will be given as a regimen of 6 mg/kg/wk for 8 weeks followed by 4 weeks of treatment. For
subjects who experience or have previously experienced significant safety/tolerability
issues, intravenous dosing will be made available.
This study does not have a minimum duration of participation. Subjects will have varying
times of study participation depending on when they enter from one of the eligible studies,
and will be permitted to continue in this study until such a time that they withdraw based on
protocol-defined criteria, or BioMarin stops the study.
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