An Open-Label Study for Previously Treated Ataluren (PTC124®) Patients With Nonsense Mutation Dystrophinopathy
试验速览
- 阶段
- 3 期
- 状态
- 已完成
- 入组人数
- 94
- 试验地点
- 21
- 主要终点
- Number of Participants With Treatment Emergent Adverse Events (TEAEs)
研究概览
简要总结
Duchenne/Becker muscular dystrophy (DBMD) is a genetic disorder that develops in boys. It is caused by a mutation in the gene for dystrophin, a protein that is important for maintaining normal muscle structure and function. Loss of dystrophin causes muscle fragility that leads to weakness and loss of walking ability during childhood and teenage years. A specific type of mutation, called a nonsense (premature stop codon) mutation, is the cause of DBMD in approximately 10-15% of boys with the disease. Ataluren is an orally delivered, investigational drug that has the potential to overcome the effects of the nonsense mutation. This study comprises a Phase 3, open-label study of ataluren in participants with nmDBMD who previously received ataluren at an Investigator site in a prior PTC-sponsored clinical study. A separate open-label study (PTC124-GD-016-DMD; NCT01247207) is being conducted for nmDBMD participants who previously received ataluren at an Investigator site in the United States (US).
详细描述
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).
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •Evidence of signed and dated informed consent/assent document(s) indicating that the participant (and/or his parent/legal guardian) has been informed of all pertinent aspects of the trial. Note: If the study candidate is considered a child under local regulation, a parent or legal guardian must provide written consent prior to initiation of study screening procedures and the study candidate may be required to provide written assent. The rules of the responsible Institutional Review Board/Independent Ethics Committee (IRB/IEC) regarding whether 1 or both parents must provide consent and the appropriate ages for obtaining consent and assent from the participant should be followed.
- •History of exposure to ataluren in a prior PTC study in nmDBMD. Note: Participants are considered eligible only if they received ataluren during their participation in 1 or more prior PTC-sponsored studies of ataluren in nmDBMD. Note: Participants who have participated in a prior or ongoing PTC study with ataluren in nmDBMD at a trial site in the US or Canada, but reside outside of the US and Canada, may be eligible for this study (with the approval of the PTC Therapeutics Medical Monitor).
- •In participants who are sexually active, willingness to abstain from sexual intercourse or employ a barrier or medical method of contraception during ataluren administration and the 6-week follow-up period.
- •Willingness and ability to comply with scheduled visits, drug administration plan, study procedures, laboratory tests, and study restrictions. Note: Psychological, social, familial, or geographical factors that might preclude adequate study participation should be considered.
排除标准
- •Exposure to another investigational drug within 1 month prior to start of study treatment.
- •Eligibility for another ataluren clinical trial that is actively enrolling study participants.
- •Known hypersensitivity to any of the ingredients or excipients of ataluren (Litesse® UltraTM [refined polydextrose], polyethylene glycol 3350, Lutrol® micro F127 [poloxamer 407], mannitol 25C, crospovidone XL10, hydroxyethyl cellulose, vanilla, Cab-O-Sil® M5P [colloidal silica], magnesium stearate).
- •Ongoing use of the following medications:
- •Coumarin-based anticoagulants (for example, warfarin), phenytoin, tolbutamide, or paclitaxel.
- •Systemic aminoglycoside therapy
- •Ongoing uncontrolled medical/surgical condition, electrocardiogram (ECG) findings, or laboratory abnormality that, in the Investigator's opinion, could adversely affect the safety of the participant or make it unlikely that follow-up would be completed.
研究组 & 干预措施
Ataluren
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.
干预措施: Ataluren (Drug)
结局指标
主要结局
Number of Participants With Treatment Emergent Adverse Events (TEAEs)
时间窗: 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.
次要结局
- Change From Baseline in Physical Function as Measured by the NSAA(Baseline, Weeks 48, 96, 144, 192, and 240)
- Change From Baseline in Time to Stand From Supine Position(Baseline, Weeks 48, 96, 144, 192, and 240)
- Change From Baseline in 6MWD as Measured by the 6MWT(Baseline, Weeks 48, 96, 144, 192, and 240)
- Change From Baseline in Time to Walk/Run 10 Meters(Baseline, Weeks 48, 96, 144, 192, and 240)
- Change From Baseline in Pulmonary Function as Measured by Spirometry(Baseline, Weeks 48, 96, 144, 192, and 240)
- Change From Baseline in Participant and Parent/Caregiver-Reported ADL, as Measured by the EK Scale(Baseline, Weeks 48, 96, 144, 192, and 240)