E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Barth Syndrome is a rare, life threatening, genetic disease which affects young males. It is caused by abnormal fats (lipids) in the powerhouses of cells (mitochondria) and those who suffer with it often develop heart failure, heart rhythm abnormalities, bacterial infections, poor growth or feeding, weak muscles, developmental delay, severe exercise intolerance, lethargy and fatigue. |
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E.1.1.1 | Medical condition in easily understood language |
Barth Syndrome is a rare, life threatening, genetic disease which affects young males. It is caused by abnormal fats in the cells and results in a variety of debilitating symptoms. |
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E.1.1.2 | Therapeutic area | Diseases [C] - Congenital, Hereditary, and Neonatal Diseases and Abnormalities [C16] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | SOC |
E.1.2 | Classification code | 10010331 |
E.1.2 | Term | Congenital, familial and genetic disorders |
E.1.2 | System Organ Class | 10010331 - Congenital, familial and genetic disorders |
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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 |
What is the effect on clinical and biochemical outcomes and Quality of Life of bezafibrate treatment in comparison to placebo in Barth Syndrome patients? |
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E.2.2 | Secondary objectives of the trial |
1. Is there a relationship between improvements in clinical outcomes (such as the ability to tolerate exercise) and laboratory measures of cardiolipin ratio/profile and mitochondrial morphology (shape and structure of the cells) when participants are exposed to bezafibrate. 2. What are the most feasible methods and standardised ways of measuring outcomes that may allow better conduct of future trials (e.g. larger multinational trials) and evaluations in Barth syndrome? 3. Is it possible to create a research infrastructure which optimises recruitment, retention and communication with families and people with Barth syndrome nationwide? 5. What are the participant and family perceptions of research and are there any important potential barriers to participation? |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
• Male aged ≥6 years old • Clinical diagnosis of Barth Syndrome with characteristic abnormality of the L4-cardiolipin/monolysocardiolipin ratio plus identified mutation in the tafazzin gene • Under the care of the NHS Barth Syndrome Service • Stable cardiac condition • Able to swallow bezafibrate tablets (similar size to Ibuprofen tablets)
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E.4 | Principal exclusion criteria |
1. Known hypersensitivity to bezafibrate, to any component of the product or to other fibrates 2. Known photoallergic or phototoxic reactions to fibrates. 3. Hepatic dysfunction and/or liver function tests greater than 2x normal 4. Unstable cardiac status: a shortening fraction of <25 (or a significant drop in shortening fraction in the previous year) 5. Documented atrial or ventricular arrhythmia (atrial/ventricular tachycardia or atrial/ventricular fibrillation) that has not been stabilised with treatment. 6. Renal impairment (creatinine clearance < 90 mL/min) 7. Pre-existing known gallbladder disease. 8. Recent unspecified significant deterioration in general health 9. Prisoners and adults lacking capacity to provide informed consent
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E.5 End points |
E.5.1 | Primary end point(s) |
The primary outcome measure is peak oxygen consumption on bicycle ergometry. This will be assessed at baseline and in the final week of each treatment phase. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
Peak oxygen consumption will be measured at baseline (before treatment starts), in the last week of the first 4 month treatment phase and then again in the last week of the second 4 month treatment phase. |
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E.5.2 | Secondary end point(s) |
1. MLCL/L4-CL ratio/cardiolipin profile 2. PCr/ATP ratio in cardiac muscle on 31P Magnetic Resonance Spectroscopy 3. Skeletal muscle oxidative function/ATP production on 31P Magnetic Resonance Spectroscopy 4. Quality of life (QOL) assessed using age-appropriate PedsQL or SF36 questionnaires 5. Absolute neutrophil count 6. Amino acid expression (serum arginine and cysteine levels) 7. Cardiac function (LVEF and shortening fraction) 8. Mitochondrial size 9. Numbers of mitochondria (per lymphocyte) 10. Total area of mitochondria per lymphocyte 11. Area of mitochondria as proportion of cytoplasm 12. Mitochondria function and cristae organisation in lymphocytes 13. Arrhythmia profile from 12 lead ECG at rest and during exercise (for potential rhythm abnormalities) |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Secondary outcomes will be measured at baseline (before treatment starts), in the last week of the first 4 month treatment phase and then again in the last week of the second 4 month treatment phase. |
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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 | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
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 | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | Yes |
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 | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | Yes |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 2 |
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 | No |
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 | Yes |
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
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The end of the trial for participants will be after they have completed the treatment period and a one month follow-up period (or have been lost to follow-up or died).
The end of the trial as a whole will be when all recruited participants have completed the treatment and follow-up period and all data has been collected, data queries answered and all laboratory samples have been processed and analysed.
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | |
E.8.9.1 | In the Member State concerned months | |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 0 |
E.8.9.2 | In all countries concerned by the trial months | 10 |
E.8.9.2 | In all countries concerned by the trial days | 8 |