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A clinical study to assess the long-term safety and efficacy of idebenone treatment in patients with Duchenne Muscular Dystrophy (DMD) who completed the SIDEROS study.

A Phase III Open-Label Extension Study to Assess the Long-Term Safety and Efficacy of Idebenone in Patients with Duchenne Muscular Dystrophy (DMD) who completed the SIDEROS study - SIDEROS-E

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2017-004279-30-SE
Enrollment
266
Registered
2018-05-15
Start date
Unknown
Completion date
Unknown
Last updated
2020-11-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Duchenne Muscular Dystrophy (DMD) MedDRA version: 20.0 Level: PT Classification code 10013801 Term: Duchenne muscular dystrophy System Organ Class: 10010331 - Congenital, familial and genetic disorders

Interventions

Sponsors

Santhera Pharmaceuticals (Switzerland) Limited
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: 1. Completion of the SIDEROS study at Visit 8/ Week 78. 2. Signed and dated Informed Consent Form. Inclusion criteria for the optional continued treatment with idebenone beyond Visit 4 of SIDEROS-E study: 1. Completion of Visit 4/ Week 78 of SIDEROS-E study 2. Signed and dated Informed Consent Form for continued treatment Are the trial subjects under 18? yes Number of subjects for this age range: 266 F.1.2 Adults (18-64 years) yes F.1.2.1 Number of subjects for this age range 40 F.1.3 Elderly (>=65 years) no F.1.3.1 Number of subjects for this age range

Exclusion criteria

Exclusion criteria: Patients who discontinued SIDEROS study prematurely (i.e. did not attend all visits from V1 to V8). Safety, tolerability or other issues arising during the course of the SIDEROS study which in the opinion of the Investigator may put the patient at significant risk or may interfere significantly with the patient’s participation in the SIDEROS-E study. Use of any investigational drug other than the study medication. Enrolment in SIDEROS-E of siblings of randomized SIDEROS patients is allowed if they meet all the inclusion and none of the exclusion criteria above. Exclusion criteria for the optional continued treatment with idebenone beyond Visit 4/ Week 78 of SIDEROS-E study: 1. Premature withdrawal from SIDEROS-E study before Visit 4/ Week 78 2. Any conditions, which, in the opinion of the Investigator might trigger a negative risk-benefit assessment for the patient 3. Use of any Investigational drug other than the study medication

Design outcomes

Primary

MeasureTime frame
Main Objective: To assess the long-term safety of idebenone in DMD patients who completed the SIDEROS study. (up to Visit 4/Week 78);Secondary Objective: To describe the long-term evolution of respiratory function in idebenone-treated DMD patients who completed the SIDEROS study, classified by background factors including, but not limited to age, DMD history (e.g. time of loss of ambulation, mutation type), type of steroid regimen and study treatment assignment in the SIDEROS study. (up to Visit 4/Week 78);Primary end point(s): Standard safety assessments, including number of premature discontinuations of study treatment due to adverse events, incidence and severity of adverse events, actual values and changes from baseline in safety laboratory parameters, vital signs and electrocardiogram (ECG). ;Timepoint(s) of evaluation of this end point: Electrocardiogram: baseline Adverse events, safety laboratory parameters, vital signs: 26 weeks , 52 weeks, 78 weeks, post-completion follow-up visit

Secondary

MeasureTime frame
Secondary end point(s): Change from Baseline in Forced Vital Capacity (FVC) as percent of predicted (FVC%p), Peak Expiratory Flow (PEF) as percent of predicted (PEF%p) and Forced Expiratory Volume in 1 second (FEV1) as percent of predicted (FEV1%p). Feasibility of continued idebenone treatment, measured with number of discontinuations of study treatment due to adverse events, will be the only applicable endpoint for the optional continued treatment period (beyond Visit 4).;Timepoint(s) of evaluation of this end point: Forced Vital Capacity (FVC), Peak Expiratory Flow (PEF)Forced Expiratory Volume in 1 second (FEV1) : baseline, 26 weeks , 52 weeks, 78 weeks.FVC and PEF in optional continued period : 130 weeks, 182 weeks. Adverse events for the optional continued treatment period : 104 weeks, 130 weeks, 156 weeks, 182 weeks

Countries

Austria, Belgium, France, Germany, Israel, Italy, Netherlands, Spain, Sweden, Switzerland, United Kingdom, United States

Contacts

Public ContactQuentin Desvigne

Santhera Pharmaceuticals (Switzerland) Limited

quentin.desvigne@santhera.com+41619068917

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026