| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Duchenne Muscular Dystrophy Amenable to Exon 51 Skipping |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Duchenne Muscular Dystrophy |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Musculoskeletal Diseases [C05] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 20.0 |  
| E.1.2 | Level | PT |  
| E.1.2 | Classification code | 10013801 |  
| E.1.2 | Term | Duchenne muscular dystrophy |  
| E.1.2 | System Organ Class | 10010331 - Congenital, familial and genetic disorders |  | 
| E.1.3 | Condition being studied is a rare disease | Yes | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| To evaluate the safety and tolerability of eteplirsen administered once weekly by intravenous (IV) infusion in male Duchenne muscular dystrophy (DMD) patients ages 6 months to 48 months, inclusive |  | 
| E.2.2 | Secondary objectives of the trial | 
| To determine the pharmacokinetics (PK) of eteplirsen at the 2-, 10-, and 30-mg/kg dose levels (with possible escalation up to 50 mg/kg), administered once weekly by IV infusion in male DMD patients ages 6 months to 48 months, inclusive |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| 1. Be a male between 6 months to 48 months of age, inclusive. 2. Have an established clinical diagnosis of DMD with a deletion mutation amenable to exon 51 skipping (e.g., deletions of exons 45-50, 47-50, 48-50, 49-50, 50, 52, 52-63).
 3. Have a parent(s) or legal guardian(s) who is able to understand and comply with the study requirements and is willing to provide written informed consent for the patient to participate in the study.
 |  | 
| E.4 | Principal exclusion criteria | 
| 1. Has received any pharmacologic treatment that might have an effect on muscle strength or function within 12 weeks prior to dosing at Week 1 (e.g., growth hormone, anabolic steroids). 2. Has received previous or current treatment with any experimental treatment. Prior drisapersen therapy is permitted if a patient has not received drisapersen for 6 months prior to the Week 1 dose.
 3. Has a clinically significant illness other than DMD, including cardiac, pulmonary, hepatic, renal, hematologic, immunologic, behavioural disease, or malignancy likely to impair the patient’s ability to participate in this study.
 4. Has a clinically significant laboratory abnormality that is either not expected or is of a greater severity than what is expected in DMD patients.
 5. Has any other condition that, in the Investigator’s opinion, could interfere with the patient’s participation in the study.
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Safety and tolerability of eteplirsen as measured by: • Incidence of adverse events (AEs)
 • Abnormal changes from baseline or clinically significant worsening of clinical safety laboratory abnormalities (hematology, chemistry, coagulation, and urinalysis)
 • Abnormal changes from baseline or worsening of vital signs
 • Abnormal changes from baseline or worsening of physical examination findings
 • Abnormal changes from baseline or clinically significant worsening of ECGs and ECHOs
 |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| Incidence of AEs: continous Clinical safety laboratory sample: Screening, Weeks 2, 4, 8, 12, 24, 36, 48, 60, 72, 84, 96 and End-of-Study Follow-up Visit
 Vital signs: Screening, baseline, on weekly infusion days, Week 96 and End-of-Study Follow-up Visit
 Physical examination: Screening, baseline, Weeks 4, 8, 12, 16, 20-48, 60, 72, 84, 96 and End-of-Study Follow-up Visit
 ECG: Screening, Weeks 8, 12, 24, 48, 60, 72, 84, 96
 ECHO: Screening, Weeks 24, 48, 72, 96
 |  | 
| E.5.2 | Secondary end point(s) | 
| PK of eteplirsen by population PK methods, including assessment of the following PK parameters (if evaluable): • Maximum plasma concentration (Cmax)
 • Time of Cmax (Tmax)
 • AUC
 • Apparent volume of distribution at steady state (Vss)
 • Clearance (CL)
 • Elimination half-life (t½)
 • Amount of drug eliminated in urine (Ae%)
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| PK plasma and uring sampling: Weeks 2, 5, 10, 24 |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | No | 
| E.6.4 | Safety | Yes | 
| E.6.5 | Efficacy | No | 
| E.6.6 | Pharmacokinetic | Yes | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | Yes | 
| E.6.13.1 | Other scope of the trial description |  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | Yes | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | Yes | 
| E.7.1.3.1 | Other trial type description | 
| Open-label, dose-escalation study |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | No | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | No | 
| E.8.1.1 | Randomised | Information not present in EudraCT | 
| E.8.1.2 | Open | Information not present in EudraCT | 
| E.8.1.3 | Single blind | Information not present in EudraCT | 
| E.8.1.4 | Double blind | Information not present in EudraCT | 
| E.8.1.5 | Parallel group | Information not present in EudraCT | 
| E.8.1.6 | Cross over | Information not present in EudraCT | 
| E.8.1.7 | Other | Information not present in EudraCT | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | Information not present in EudraCT | 
| E.8.2.2 | Placebo | Information not present in EudraCT | 
| E.8.2.3 | Other | Information not present in EudraCT | 
| E.8.3 | The trial involves single site in the Member State concerned | Yes | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | No | 
| E.8.5 | The trial involves multiple Member States | Yes | 
| E.8.5.1 | Number of sites anticipated in the EEA | 5 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.7 | Trial has a data monitoring committee | No | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 3 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 3 | 
| E.8.9.2 | In all countries concerned by the trial months | 0 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |