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NCT Number: NCT00654784

Efficacy and Tolerability of Idebenone in Boys With Cardiac Dysfunction Associated With Duchenne Muscular Dystrophy

Idebenone is a synthetic analogue of coenzyme Q10 and is a powerful antioxidant and essential constituent of the process of energy production on the cellular level. It can protect mitochondria from oxidative damage and boost their impaired function. It is thought that this mechanism will slow decline in heart function that is part of the disease process of Duchenne Muscular Dystrophy (DMD). It is possible that patients may benefit in terms of muscle strength and respiratory function. This pilot trial is designed to investigate this.

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Key information

Conditions

Duchenne Muscular Dystrophy (DMD) Congenital, Hereditary, and Neonatal Diseases and Abnormalities Genetic Diseases, Inborn Genetic Diseases, X-Linked Muscular Diseases Muscular Disorders, Atrophic Muscular Dystrophies Muscular Dystrophy, Duchenne Musculoskeletal Diseases Nervous System Diseases Neuromuscular Diseases

Age range

8 year–16 year

Sex eligibility

Male

Study type

Interventional

Phase

Phase 2

Primary location

Children's Hospital, University Hospital

Leuven, Belgium

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients 8 - 16 years of age at time of enrolment
  • Male
  • Presence of cardiac involvement/dysfunction, defined by abnormal peak systolic strain in left ventricle (LV) inferolateral wall
  • Confirmed diagnosis of DMD (out of frame dystrophin gene deletion OR absent/<5% dystrophin protein on muscle biopsy; clinical picture consistent of typical DMD)
  • If on chronic glucocorticosteroids treatment (deflazacort, prednisone) for DMD (or any other disease) (i.e. concomitant medication): dosage must be stable (unchanged) 6 months prior to inclusion
  • If on chronic medication for DMD associated cardiomyopathy (β-blocker, diuretics): dosage must be stable (unchanged) 3 months prior to inclusion
  • Ability to provide reproducible repeat quantitative muscle testing (QMT) upper limb score within 15% of first assessment score (at Visit1/Day 1 versus Screening Visit

Exclusion criteria

  • Symptomatic cardiomyopathy or heart failure
  • Asymptomatic but severe cardiac dysfunction on baseline (Screening) evaluation: Fractional shortening (FS) < 20% and/or Ejection fraction (EF) < 40%
  • Use of ACE-inhibitors
  • Previous history of ventricular arrhythmias (other than isolated ventricular extrasystole); ventricular arrhythmias presented at Screening
  • Previous (6 months or less) participation in any other therapeutic trial for DMD
  • Use of coenzymeQ10, idebenone, creatine, glutamine, oxatomide, or any herbal medicines within the last 6 months
  • History of significant concomitant illness or significant impairment of renal or hepatic function
  • Known individual hypersensitivity to idebenone

Treatment and study plan

Idebenone

Drug

idebenone 450 mg/day (150 mg three times a day)

Placebo

Drug

Primary outcomes

  1. The Relative Change in Peak Systolic Radial Strain of the Left Ventricle (LV) Inferolateral Wall From Baseline (at Screening) to Week 52, Assessed by Color Doppler Myocardial Imaging (CDMI).

    Time frame: baseline and Week 52

    • Assessing the peak systolic radial strain of the left ventricle inferolateral wall is used to characterize the cardiac involvement in the DMD patients.
    • Color Doppler Myocardial Imaging technique is used to quantify regional myocardial function.

    The cardiac involvement in DMD is characterized by degeneration, atrophy and fibrosis of the myocardium, leading to dilated cardiomyopathy. The process begins in the posterolateral wall of the left ventricle, with septal involvement appearing at later stages.

Secondary outcomes

  1. Respiratory Function: Forced Vital Capacity (FVC), Forced Expiratory Volume in 1 Second (FEV1), Maximal Inspiratory Pressure (MIP) and Peak Flow (PF)

    Time frame: 1 year

  2. Skeletal Muscle Strength (Upper Limb, Right and Left): Hand Grip, Elbow Flexors and Elbow Extensors (Upper Limb Score) Timed Walking Test (10 Metres) (Ambulant Patients Only)

    Time frame: 1 year

  3. Safety and Tolerability, Assessed by Adverse Events, Blood and Urine Laboratory Measures, ECG.

    Time frame: 1 year

Sponsors and collaborators

Lead sponsor

Santhera Pharmaceuticals

Industry

Registry information

Official study title

A Phase IIa Double Blind, Randomised, Placebo Controlled, Single Centre Study at the University of Leuven to Assess the Efficacy and Tolerability of Idebenone in 8 - 16 Year Old Males With Cardiac Dysfunction Associated With Duchenne Muscular Dystrophy

Acronym: DELPHI

Important dates

Study start
2005
Primary completion
2007
Study completion
2007
First posted
Apr 9, 2008
Registry last updated
Aug 1, 2011

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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