| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Adrenomyeloneuropathy | 
 
| Adrenomieloneuropatía | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Nervous System Diseases [C10] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 17.0 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10069075 | 
 
| E.1.2 | Term  | Adrenomyeloneuropathy without cerebral involvement | 
 
| E.1.2 | System Organ Class  | 100000004850 | 
 
 
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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  | 
| To demonstrate the superiority of MD1003 (biotin) at 300 mg/day over placebo in the clinical improvement of patients with Adrenomyeloneuropathy | 
 
| Demostrar la mayor eficacia de MD1003 respecto del placebo para la mejora clínica de pacientes con AMN. | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
| To evaluate safety of MD1003 in patients with Adrenomyeloneuropathy | 
 
| Evaluar la seguridad de MD1003 en el tratamiento de la AMN. | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
- Men of 18 to 60 years old, inclusive        - ABCD1 gene mutation  identified       - Elevated plasma VLCFA  - Clinical signs of AMN with at least pyramidal signs in the lower limbs and difficulties to walk  - EDSS score  ? 3.5  and ? 6.5 - Normal brain MRI or brain MRI showing :       - abnormalities that can be observed in AMN patients without cerebral demyelination with a maximum Loes score of 4        - and/or stable (?6 months) cerebral demyelination without gadolinium enhancement with a Loes score ?12. - Appropriate steroid replacement if adrenal insufficiency is present - Likely to be able to participate in all scheduled evaluation visits and complete all required study procedures - Signed and dated written informed consent to participate in the study in accordance with local regulations - Affiliated to a Health Insurance | 
 
° Hombres de 18 a 60 años con AMN: - mutación de ABCD1 identificada; - elevadas concentraciones plasmáticas de AGCML (ácidos grasos de cadena muy larga). ° Signos clínicos de AMN con al menos un síndrome del piramidal en las extremidades inferiores y dificultad para caminar. ° Puntuación de entre 3,5 y 6,5 en la escala EDSS (Escala Expandida del Estado de Discapacidad). ° IRM cerebral normal o IRM cerebral que muestre: (a) anomalías que pudiera observarse en pacientes con AMN sin desmielinización cerebral y con puntuación máxima de 4 en la escala de Loes; y/o (b) desmielinización estable (≥ 6 meses) sin captación de gadolinio con puntuación ≤ 12 en la escala de Loes. ° Sustitución adaptada con esteroides en caso de insuficiencia surrenal. ° Capacidad de realizar todas las evaluaciones previstas. ° Firma del consentimiento informado. | 
 
 
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| E.4 | Principal exclusion criteria | 
- Brain MRI abnormalities with a Loes score > 12 or with gadolinium enhacement - Any progressive neurological disease other than AMN - Impossibility to perform the  walk tests and the TUG test - Patients with uncontrolled hepatic disorder, renal or cardiovascular disease, or any evolutive malignancy  - Any new medication for AMN including Fampridine initiated less than 1 month prior to inclusion - Contraindications for MRI procedure such as subjects with paramagnetic materials in the body, such as aneurysm clips, pacemakers, intraocular metal or cochlear implants. - Inclusion in another therapeutic clinical trial for ALD - Patient not easily reachable by the investigator in case of emergency or not capable to call the investigator | 
 
° IRM cerebral anómala con puntuación en la escala de Loes > 12 o con captación de gadolinio. ° Cualquier neuropatía distinta de la AMN. ° Incapacidad de realizar las pruebas de marcha y la prueba funcional de TUG. ° Enfermedad hepática, renal o cardiovascular, o cualquier patología maligna evolutiva. ° Cualquier nuevo tratamiento para la AMN en que se haya iniciado la administración de fampridina menos de un mes antes de la inclusión. ° Pacientes en que la IRM esté contraindicada. ° Inclusión en otro ensayo para el tratamiento de la AMN. ° Difícil acceso al investigador en caso de urgencia o imposibilidad de acudir al investigador durante el estudio en general. | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Mean change of 2 minutes walking test (2MWT) between M12 and baseline | 
 
| variación de 2 minutos en la prueba de M12 respecto del valor inicial. | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| Baseline, 12 months, 24 months | 
 
| Valor inicial, 12 meses y 24 meses | 
 
 
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| E.5.2 | Secondary end point(s) | 
- Proportion of patients with improved 2-Minutes-Walk-Tests (2MWT) of at least 20% at M9 and M12 compared to the best value among screening and baseline? - Proportion of patients with improved TW25 (time to walk 25 feet) of at least 20% at M9 and M12 compared to the best value among screening and baseline - Timed up and Go test (TUG) - Euroqol EQ-5D questionnaire - Qualiveen to evaluate urinary function  - To evaluate the safety of high dose of biotin assessed by: adverse events, clinical examination (vital signs, ECG), standard laboratory tests (hematology, biochemistry) Exploratory studies (optional): 1)	Brain MRI with conventional and non conventional sequences:  a) diffusion tensor imaging (DTI) parameters in the upper cervical spinal cord and brain; b) magnetic resonance spectroscopy (MRS) in the cerebral white matter. 2)	Evaluation of muscle strength by the use of a dynamometer 3)	Nerve conduction velocities in lower limbs (NCV) | 
 
- Proporción de pacientes que presente una mejora del 20 % en la 2MWT (prueba de marcha 2 min) de M12 respecto de la de M9 - Proporción de pacientes que presente una mejora del 20 % en la TW25 (prueba cronometrada de marcha de 25 pies) de M12 respecto de la de M9 - Prueba TUG cronometrada - Cuestionario Euroqol EQ-5D - Cuestionario Qualiveen (función urinaria) - Evaluación de la tolerancia a dosis elevadas de biotina: acontecimientos adversos, examen clínico (constantes vitales, ECG), análisis biológicos estándar (hematología y bioquímica) Criterios de exploración (optativos): 1) IRM cerebral: a) IRM convencional; b) Imagen por tensor de difusión (ITD) cerebral y medular; c) Espectroscopia por resonancia magnética (ERM) de la sustancia blanca del cerebral. 2) Evaluación de la fuerza muscular mediante dinamómetro. 3) Velocidad de conducción nerviosa (VCN) de las extremidades inferiores. | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| Baseline, 9 months, 12 months, 18 months, 24 months | 
 
| Valor inicial, 9 meses, 12 meses, 18 meses y 24 meses | 
 
 
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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) |  Yes  | 
| 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 |  Yes  | 
| E.8.1.6 | Cross over  |  No  | 
| 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
                             |  No  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 2 | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 4 | 
| 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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| Last visit of the last patient | 
 
 
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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 | 2 | 
| 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 | 2 |