Study of Ataluren for Previously Treated Participants With Nonsense Mutation Duchenne/Becker Muscular Dystrophy (nmDBMD) in Europe, Israel, Australia, and Canada
|The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.|
|ClinicalTrials.gov Identifier: NCT01557400|
Recruitment Status : Completed
First Posted : March 19, 2012
Results First Posted : November 25, 2020
Last Update Posted : November 25, 2020
|Condition or disease||Intervention/treatment||Phase|
|Duchenne Muscular Dystrophy Becker Muscular Dystrophy Dystrophinopathy||Drug: Ataluren||Phase 3|
All participating sites must have had at least 1 participant that received ataluren treatment in prior PTC-sponsored clinical studies in DBMD (Phase 2b double-blind, placebo-controlled study [PTC124-GD-007-DMD; NCT00592553] and the subsequent open-label extension study [Study PTC124-GD-007e-DMD; NCT00847379]). It is planned that up to ~96 participants will be enrolled.
It is also planned that participants will receive ataluren 3 times per day (TID) at respective morning, midday, and evening doses of 10 milligrams/kilograms (mg/kg), 10 mg/kg, and 20 mg/kg for approximately 336 weeks. Study assessments will be performed at clinic visits during screening, on the first day of ataluren dosing, and then every 48 weeks during the ataluren treatment period, except for weight, which will be measured every 24 weeks at a primary care physician (PCP).
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||94 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||An Open-Label Study for Previously Treated Ataluren (PTC124®) Patients With Nonsense Mutation Dystrophinopathy|
|Actual Study Start Date :||May 20, 2012|
|Actual Primary Completion Date :||January 19, 2018|
|Actual Study Completion Date :||January 19, 2018|
Ataluren will be provided as a vanilla-flavored powder to be mixed with water, milk, fruit juice (except apple juice) fruit punch, or in semi-solid food (for example, yogurt, pudding, or applesauce). The dose level for ataluren will be 10 milligrams/kilograms (mg/kg) in the morning, 10 mg/kg at midday, and 20 mg/kg in the evening. Administration within 30 minutes after a meal will be recommended. Study drug dosing will be based on milligrams of drug per kilogram of body weight. Because of potential changes in participant body weight over time, weight-based dose adjustment can occur every 24 weeks as required. Study drug will be taken for up to 240 weeks.
Oral powder for suspension
Other Name: PTC124®
- Number of Participants With Treatment Emergent Adverse Events (TEAEs) [ Time Frame: Baseline up to Week 246 ]A TEAE is any untoward medical occurrence or undesirable event(s) experienced in a participant that begins or worsens following administration of the study drug or study treatment, whether or not considered related to the treatment by the Investigator. A serious adverse event (SAE) was an adverse event (AE) resulting in any of the following outcomes or deemed significant for any other reason, death, initial or prolonged inpatient hospitalization, life-threatening experience (immediate risk of dying), or persistent or significant disability/incapacity not related to nmDBMD. AEs included both SAEs and non-serious AEs. AEs were classified according to National Cancer Institute Common Terminology Criteria for Adverse Events version 3.0 (CTCAE) and coded using the Medical Dictionary for Regulatory Activities (MedDRA). A summary of serious and all other non-serious adverse events, regardless of causality, is located in the Reported Adverse Events module.
- Change From Baseline in 6MWD as Measured by the 6MWT [ Time Frame: Baseline, Weeks 48, 96, 144, 192, and 240 ]The 6MWD was assessed in participants who were ambulatory using standardized procedures. Participants were not permitted to use assistive devices (walker, long leg braces, or short leg braces) during the 6MWD test.
- Change From Baseline in Physical Function as Measured by the NSAA [ Time Frame: Baseline, Weeks 48, 96, 144, 192, and 240 ]The NSAA was used to evaluate physical function in participants who were ambulatory at study entry, using standardized procedures. The NSAA consisted of 17 activities, each scored as 0 (activity could not be performed), 1 (modified method but achieved goal without physical assistance from another), or 2 (normal, achieved goal without assistance). The sum of these 17 scores was used to form a total score. If fewer than 13 of the 17 activities were performed, the total score was considered missing. If 13 to 16 activities were performed, the total score was calculated by multiplying the sum of the scores in the x activities that were performed by 17/x. If an activity could not be performed due to disease progression/loss of ambulation, a score of 0 was assigned. The linear score was the linear transformation of the NSAA score to a scale of 0 (worst) to 100 (best).
- Change From Baseline in Time to Stand From Supine Position [ Time Frame: Baseline, Weeks 48, 96, 144, 192, and 240 ]Time to stand from the supine position to a standing position was assessed in ambulatory participants. If the time taken to perform a test exceeded 30 seconds or if a participant could not perform the test due to disease progression, a value of 30 seconds was used.
- Change From Baseline in Time to Walk/Run 10 Meters [ Time Frame: Baseline, Weeks 48, 96, 144, 192, and 240 ]Time to walk/run 10 meters was measured in ambulatory participants. If the time taken to perform a test exceeded 30 seconds or if a participant could not perform the test due to disease progression, a value of 30 seconds was used.
- Change From Baseline in Pulmonary Function as Measured by Spirometry [ Time Frame: Baseline, Weeks 48, 96, 144, 192, and 240 ]Pulmonary function parameters of %-predicated FVC, percent-predicted FEV1 (adjusted using ulna length and age), PEF, and PCF was assessed in non-ambulatory participants by using a spirometer. Due to the difficulty in obtaining an accurate standing height measurement in non-ambulatory participants, ulna length and arm span were used as a surrogate measure for height when calculating percent-predicted FVC.
- Change From Baseline in Participant and Parent/Caregiver-Reported ADL, as Measured by the EK Scale [ Time Frame: Baseline, Weeks 48, 96, 144, 192, and 240 ]Activities of daily living after loss of ambulation were measured using the EK scale. The EK scale is an ordinal scale ranging from 0 to 30 points where 0 represents the highest level of independent function and 30 the lowest. The scale consists of 10 categories (each scored 0 to 3), involving different functional domains including 1) ability to use wheelchair, 2) ability to transfer from wheelchair, 3) ability to stand, 4) ability to balance in the wheelchair, 5) ability to move arms, 6) ability to use hands and arms when eating, 7) ability to turn in bed, 8) ability to cough, 9) ability to speak, and 10) physical well-being. The administration of the EK scale consisted of an interview of the participant to capture how he performs the tasks of daily life (as described by Categories 1 to 9) and how he perceives his wellbeing (as described by Category 10). The interviewer observed the participant and assigned the final score for the tasks that could be observed in the clinic.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01557400
|Study Director:||Edward O'Mara, MD||PTC Therapeutics|