E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Generalized Myasthenia Gravis |
Miastenia Grave Generalizada |
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E.1.1.1 | Medical condition in easily understood language |
Myasthenia Gravis in patients aged 2 to 18 years who have generalized Muscle Weakness |
Miastenia Grave en pacientes de 2 a 18 años que tienen debilidad muscular generalizada |
|
E.1.1.2 | Therapeutic area | Diseases [C] - Immune System Diseases [C20] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 21.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10028417 |
E.1.2 | Term | Myasthenia gravis |
E.1.2 | System Organ Class | 10029205 - Nervous system 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 |
To evaluate the safety and tolerability of efgartigimod IV |
Evaluar la seguridad y la tolerabilidad de efgartigimod IV |
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E.2.2 | Secondary objectives of the trial |
To evaluate the immunogenicity of efgartigimod IV |
Evaluar la inmunogenicidad de efgartigimod IV |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. The participant completed ARGX-113-2006, defined as: a. The participant reached EoT in trial ARGX-113-2006 and agreed to participate in the ARGX-113-2008 trial. b. The participant qualifies for retreatment in trial ARGX-113-2006, but cannot complete a Treatment Period (TP) and the required IP visits within the ARGX-113-2006 trial's timeframe (ie, between TPnV1 to IPnV4). 2. Either the participant or the participant’s legally acceptable representative (LAR) can understand the requirements of the trial and provide written informed consent/assent (including consent/assent for the use and disclosure of research-related health information), and demonstrates a willingness and ability to comply with the trial protocol procedures (including attending the required trial visits). 3. Contraceptive use by males and females must be consistent with local regulations for those participating in clinical trials and: a. Male participants agree not to donate sperm from the time the informed consent form (ICF) is signed until the end of the trial. b. Female adolescents of childbearing potential (FAOCBP; defined in Section 10.4.1.1 of the protocol ) must have a negative urine pregnancy test at trial entry (TP1V1 or IP0V1). The contraceptive requirements for male participants are described in Section 10.4.2.2. The contraceptive requirements for FAOCBP are described in Section 10.4.2.1. |
1. El participante ha completado el estudio ARGX-113-2006, lo que se define como: a. El participante alcanzó el FDE en el ensayo ARGX-113-2006 y accedió a participar en el ensayo ARGX-113-2008. b. El participante cumple los requisitos para repetir el tratamiento en el ensayo ARGX-113-2006, pero no puede completar un período de tratamiento (PT) ni las visitas IP obligatorias dentro del plazo del ensayo ARGX-113-2006 (es decir, entre TPnV1 e IPnV4). 2. El participante o su representante legal pueden comprender los requisitos del ensayo y otorgar su consentimiento/asentimiento informado por escrito (incluido el consentimiento/asentimiento para el uso y la comunicación de información médica relacionada con la investigación) y muestran disposición y capacidad para cumplir los procedimientos del protocolo del ensayo (incluida la asistencia a las visitas obligatorias del ensayo). 3. El uso de anticonceptivos por varones y mujeres deberá cumplir la normativa local para participantes en ensayos clínicos y: a. Los varones participantes se comprometen a no donar semen desde el momento de la firma del documento de consentimiento informado (DCI) hasta el final del ensayo. b. Las adolescentes en edad fértil (definición en la sección 10.4.1.1 del protocolo) deberán tener una prueba de embarazo en orina negativa en el momento de incorporarse al ensayo (TP1V1 o IP0V1). Los requisitos sobre anticonceptivos para los varones participantes se describen en la sección 10.4.2.2. Los requisitos sobre anticonceptivos para las adolescentes en edad fértil se describen en la sección 10.4.2.1. |
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E.4 | Principal exclusion criteria |
Participants are excluded from the trial if any of the following criteria apply: 1. FAOCBP: Pregnancy or lactation, or the participant intends to become pregnant during the trial or within 90 days after the last dose of investigational medicinal product (IMP) 2. Discontinued early from ARGX-113-2006 treatment due to: pregnancy, receiving prohibited medication, participating in another trial with an investigational product, or the occurrence of a life-threatening or an investigational medicinal product-related AE, as assessed by the investigator 3. A known hypersensitivity reaction to efgartigimod or any of its excipients 4. Received a live-attenuated vaccine fewer than 4 weeks before trial entry. 5. Any of the following medical conditions: a. Clinically significant uncontrolled chronic bacterial, viral, or fungal infection at trial entry b. Any other known autoimmune disease that, in the opinion of the investigator, would interfere with accurate assessment of clinical symptoms of gMG or put the participant at undue risk |
Se excluirá del estudio a los participantes que cumplan alguno de los criterios siguientes: 1. Adolescentes en edad fértil: Embarazo o lactancia, o intención de quedarse embarazada durante el ensayo o en los 90 días siguientes a la última dosis del producto en investigación (PEI). 2. Suspensión prematura del tratamiento con ARGX-113-2006 por embarazo, recepción de un medicamento no permitido, participación en otro ensayo con un producto en investigación o aparición de un AA potencialmente mortal o relacionado con el producto en investigación, según la evaluación del investigador. 3. Reacción de hipersensibilidad conocida a efgartigimod o a cualquiera de sus excipientes. 4. Recepción de una vacuna atenuada con microbios vivos menos de 4 semanas antes de la incorporación al ensayo. 5. Cualquiera de las siguientes afecciones: a. Infección bacteriana, viral o micótica crónica, no controlada y clínicamente significativa al incorporarse al ensayo. b. Cualquier otra enfermedad autoinmunitaria conocida que, en opinión del investigador, podría interferir en una evaluación exacta de los síntomas clínicos de la MGg o suponer un riesgo excesivo para el participante. |
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E.5 End points |
E.5.1 | Primary end point(s) |
- Incidence and severity of adverse events (AEs) - Incidence and severity of serious adverse events (SAEs) - Incidence and severity of adverse events of special interest (AESIs) - Changes in laboratory test results, vital signs, height and weight, and electrocardiogram (ECG) results |
- Incidencia e intensidad de los acontecimientos adversos (AA) - Incidencia e intensidad de los acontecimientos adversos graves (AAG) - Incidencia e intensidad de los acontecimientos adversos de interés especial (AAIE) - Variaciones de los resultados analíticos, las constantes vitales, la estatura y el peso y los resultados del electrocardiograma (ECG) |
|
E.5.1.1 | Timepoint(s) of evaluation of this end point |
Once a month |
Una vez al mes |
|
E.5.2 | Secondary end point(s) |
Incidence and prevalence of antidrug antibodies (ADAs) against efgartigimod |
Incidencia y prevalencia de anticuerpos contra el fármaco (ACF) dirigidos contra efgartigimod |
|
E.5.2.1 | Timepoint(s) of evaluation of this end point |
No specific timepoints, during the entire study |
No hay momentos específicos; durante todo el estudio |
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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 | Yes |
E.6.13.1 | Other scope of the trial description |
- Tolerability - Immunogenicity |
- Tolerabilidad - Inmunogenicidad |
|
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 | No |
E.8.1.1 | Randomised | No |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
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 | No |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 1 |
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 | 21 |
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 |
Austria |
Belgium |
Canada |
France |
Georgia |
Germany |
Italy |
Netherlands |
Poland |
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
|
The end of the trial is defined as the date of the last visit of the last participant in the ARGX-113-2008 trial. A participant is considered to have completed the trial if he/she completed the end of trial (EoT) visit and safety follow-up (SFU) visit |
El final del ensayo se define como la fecha de la última visita del último participante en el ensayo ARGX-113-2008. Se considera que un participante ha finalizado el ensayo si completa la visita de final del ensayo (FDE) y la visita de seguimiento de la seguridad (SS). |
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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 | 4 |
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 | 4 |