E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Charcot-Marie-Tooth Disease type 1A |
Enfermedad de Charcot-Marie-Tooth de tipo 1A |
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E.1.1.1 | Medical condition in easily understood language |
Charcot-Marie-Tooth Disease type 1A |
Enfermedad de Charcot-Marie-Tooth de tipo 1A |
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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 | 19.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10008414 |
E.1.2 | Term | Charcot-Marie-Tooth disease |
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 |
The main objective of the study is to assess the long-term safety and tolerability of PXT3003 up to 2 years, and to increase the exposed population receiving PXT3003 for at least 9 months. |
El objetivo principal del estudio es evaluar la seguridad y la tolerabilidad a largo plazo de PXT3003 durante un máximo de 2 años, así como aumentar la población de pacientes expuestos que reciban PXT3003 durante al menos 9 meses. |
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E.2.2 | Secondary objectives of the trial |
To gather up-to-2-year data to estimate the long term effect of PXT3003 on clinical, functional and electrophysiological endpoints; - To compare the effect of PXT3003 in patients receiving PXT3003 active dose from the start of the primary study to patients assigned to a delayed start (i.e., who received placebo during the primary study) in order to show if PXT3003 slows the progression of the disease - To assess the evolution of potential blood biomarkers and molecular changes in skin biopsy on longer term. |
- Recopilar datos de hasta 2 años para calcular el efecto a largo plazo de PXT3003 en los criterios de valoración clínicos, funcionales y lectrofisiológicos - Comparar el efecto de PXT3003 en pacientes que reciben una dosis activa de PXT3003 desde el principio del estudio principal con pacientes asignados a un inicio tardío (es decir, los que recibieron placebo durante el estudio principal) a fin de demostrar si PXT3003 ralentiza la progresión de la enfermedad - Evaluar la evolución de posibles biomarcadores sanguíneos y cambios moleculares en la biopsia de piel a largo plazo. |
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E.2.3 | Trial contains a sub-study | Yes |
E.2.3.1 | Full title, date and version of each sub-study and their related objectives |
- Skin Biopsy (ancillary sub-study) for molecular biology will be done at the end of the study (9-month visit) - MRI measure (ancillary sub-study) of muscle/fat index in the leg (by MRI quantification of lower limb muscles and fatty muscle infiltration) will be performed at the end of the study (9-month visit). |
- Biopsia de piel (sub-estudio opcional) para biología molecular, que se hará al final del estudio (visita de los 9 meses) - RMN (sub-estudio opcional) de músculo/índice de grasa en la pierna (por RMN de cuantificación en los músculos de las extremidades inferiores e infiltración de grasa en los músculos), que se hará al final del estudio (visita de los 9 meses) |
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E.3 | Principal inclusion criteria |
Male or female patients with all of the following inclusion criteria will be considered for randomization: 1. Patient previously randomized to the initial PLEO-CMT study (protocol CLN-PXT3003-02) and having completed 15 months of double-blind treatment in that study, including all procedures required at the Study Termination visit (V6) 2. Patient providing a signed written informed consent to participate in the extension study and willing and able to comply with all study procedures and scheduled visits. 3. Female patients must agree to continue using an approved method of birth control throughout the extension study |
Pacientes varones o mujeres con todos los siguientes criterios de inclusión para ser considerados para aleatorización en el ensayo: - Los pacientes deben haber recibido tratamiento doble ciego durante 15 meses en el estudio principal CLN-PXT3003-02, incluidos todos los procedimientos necesarios en la visita de finalización del estudio (V6). - Las pacientes deberán aceptar seguir utilizando un método anticonceptivo aprobado a lo largo de todo el estudio de extensión. - Para participar en este estudio, los pacientes deberán firmar un consentimiento informado por escrito, específico para el estudio de extensión. En el caso de menores de entre 16 y 18 años, deberá recogerse el consentimiento tanto del padre/madre como del menor. |
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E.4 | Principal exclusion criteria |
Patients with any of the following criteria will be excluded from entry: 1. Presenting any clinically significant change in health status that, in the opinion of the Investigator, would prevent the subject from participating in this study or successfully completing this study. 2. Any unauthorized concomitant treatments, as study CLN-PXT3003-02. |
Los pacientes con alguno de los siguientes criterios serán excluidos - Todo cambio clínicamente significativo en el estado de salud que, a criterio del investigador, impediría que el paciente participara en el estudio o que lo finalizara de forma satisfactoria. - Todo tratamiento concomitante no autorizado, como en el estudio CLN-PXT3003-02 |
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E.5 End points |
E.5.1 | Primary end point(s) |
To assess the safety and tolerability of PXT3003 in CMT1A patients during a long term period, the primary endpoint will be the incidence of Treatment-Emergent Adverse Events (TEAEs) Related to the Investigational Product during the follow-up, in patients exposed to PXT3003 for 24 months or 9 months. The incidence of TEAEs in the two groups P / D1-9m and P/ D2-9m will be compared to the first 9-month placebo period in the primary study. The incidence of TEAEs in the two groups D1-24m, D2-24m will be compared to the first 9-month period in the primary study for their corresponding group. |
Evaluar la seguridad y tolerabilidad de PXT3003 en pacientes con CMT1A durante un período prolongado. El criterio de valoración principal será la incidencia de acontecimientos adversos de aparición durante el tratamiento (AAAT) relacionados con el producto en investigación durante el seguimiento en pacientes expuestos a PXT3003 durante 24 meses o 9 meses. La incidencia de AAAT en los dos grupos P/D1-9m y P/D2-9m se comparará con el primer período con placebo de 9 meses del estudio principal. La incidencia de AAAT en los dos grupos D1-24m y D2-24m se comparará con el primer período de 9 meses del estudio principal para el grupo correspondiente. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
The incidence of TEAEs in the two groups P/ D1-9m and P / D2-9m will be compared to the first 9-month placebo period in the primary study. The incidence of TEAEs in the two groups D1-24m, D2-24m will be compared to the first 9-month period in the primary study for their corresponding group |
La incidencia de AAAT en los dos grupos P/D1-9m y P/D2-9m se comparará con el primer período con placebo de 9 meses del estudio principal. La incidencia de AAAT en los dos grupos D1-24m y D2-24m se comparará con el primer período de 9 meses del estudio principal para el grupo correspondiente. |
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E.5.2 | Secondary end point(s) |
Secondary safety endpoints will be: - The incidence of all Treatment-Emergent Adverse Events (TEAEs) and evaluation of their type/nature, severity/intensity, seriousness, duration, relationship to study drug, and outcome; - The incidence of AEs leading to withdrawal of study drug; - The changes in laboratory parameters, ECGs, vital signs and physical examinations; |
Se evaluarán otros criterios de valoración de la seguridad: - Incidencia de todos los AAAT y su evaluación en cuanto a tipo/naturaleza, intensidad, gravedad, duración, relación con el fármaco del estudio y desenlace; - Incidencia de AA que den lugar a la retirada del fármaco del estudio; - Cambio en los parámetros analíticos, ECG, constantes vitales y exploraciones físicas; |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
For the patients receiving 24 months of active dose along the two successive studies (from groups D1-24m and D2-24m) the clinical response will be assessed by the change from V1/baseline of each endpoint. For the patients who received placebo during the 15-month primary study and active drug during the 9-month extension study (from groups P/D1-9m and P/D2-9m) the clinical response will be assessed after 9 months of PXT3003 treatment by the change from V6/baseline. The Percentage of responders to PXT3003 defined as a patients improving on ONLS at end of treatment (V9) will be assessed in the patients receiving the active dose of PXT3003 during 24 months (from groups D1-24m, D2-24m). |
Par los pacientes que reciban 24 meses de dosis activa en los 2 estudios sucesivos (de los grupos D1-24m y D2-24m), la respuesta clínica se evaluará mediante el cambio respecto a la V1/inicio de cada criterio de valoración. Par los pacientes que recibieron placebo durante el estudio principal de 15 meses y fármaco activo durante el estudio de extensión de 9 meses grupos P/D1-9m y P/D2-9m), la respuesta clínica se evaluará tras 9 meses de tratamiento con PXT3003 mediante el cambio respecto a la V6/inicio El % de pacientes con respuesta a PXT3003, definido como los pacientes cuya puntuación en ONLS mejora al final del tratamiento (V9), se evaluará en los pacientes que reciben la dosis activa de PXT3003 durante 24 meses (de los grupos D1-24m y D2-24m) |
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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) | No |
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 | 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) | No |
E.8.2.2 | Placebo | No |
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 | 4 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 18 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
Belgium |
Canada |
France |
Germany |
Netherlands |
Spain |
United Kingdom |
United States |
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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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LVLS |
Última Visita del último paciente |
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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 | 1 |
E.8.9.1 | In the Member State concerned months | 8 |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 1 |
E.8.9.2 | In all countries concerned by the trial months | 8 |