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    Summary
    EudraCT Number:2020-002396-35
    Sponsor's Protocol Code Number:XPF-009-301
    National Competent Authority:France - ANSM
    Clinical Trial Type:EEA CTA
    Trial Status:Completed
    Date on which this record was first entered in the EudraCT database:2021-09-07
    Trial results View results
    Index
    A. PROTOCOL INFORMATION
    B. SPONSOR INFORMATION
    C. APPLICANT IDENTIFICATION
    D. IMP IDENTIFICATION
    D.8 INFORMATION ON PLACEBO
    E. GENERAL INFORMATION ON THE TRIAL
    F. POPULATION OF TRIAL SUBJECTS
    G. INVESTIGATOR NETWORKS TO BE INVOLVED IN THE TRIAL
    N. REVIEW BY THE COMPETENT AUTHORITY OR ETHICS COMMITTEE IN THE COUNTRY CONCERNED
    P. END OF TRIAL
    Expand All   Collapse All
    A. Protocol Information
    A.1Member State ConcernedFrance - ANSM
    A.2EudraCT number2020-002396-35
    A.3Full title of the trial
    A Phase 3 Study of Adjunctive XEN496 in Pediatric Subjects with KCNQ2 Developmental and Epileptic Encephalopathy
    Étude de phase III évaluant le XEN496 en traitement adjuvant chez des patients pédiatriques atteints d’encéphalopathie épileptique et développementale associée à KCNQ2
    A.3.1Title of the trial for lay people, in easily understood, i.e. non-technical, language
    Study in pediatric subjects with KCNQ2 Developmental and Epileptic Encephalopathy
    Étude chez les patients pédiatriques atteints d’encéphalopathie épileptique et de troubles du développement liés à KCNQ2
    A.3.2Name or abbreviated title of the trial where available
    EPIK
    A.4.1Sponsor's protocol code numberXPF-009-301
    A.5.2US NCT (ClinicalTrials.gov registry) numberNCT04639310
    A.7Trial is part of a Paediatric Investigation Plan No
    A.8EMA Decision number of Paediatric Investigation Plan
    B. Sponsor Information
    B.Sponsor: 1
    B.1.1Name of SponsorXenon Pharmaceuticals Inc.
    B.1.3.4CountryCanada
    B.3.1 and B.3.2Status of the sponsorCommercial
    B.4 Source(s) of Monetary or Material Support for the clinical trial:
    B.4.1Name of organisation providing supportXenon Pharmaceuticals Inc.
    B.4.2CountryCanada
    B.5 Contact point designated by the sponsor for further information on the trial
    B.5.1Name of organisationXenon Pharmaceuticals Inc.
    B.5.2Functional name of contact pointMedical Affairs
    B.5.3 Address:
    B.5.3.1Street Address200-3650 Gilmore Way
    B.5.3.2Town/ cityBurnaby, BC
    B.5.3.3Post codeV5G 4W8
    B.5.3.4CountryCanada
    B.5.4Telephone number+1-604-484-3300
    B.5.5Fax number+1-604-484-1336
    B.5.6E-mailXenonCares@xenon-pharma.com
    D. IMP Identification
    D.IMP: 1
    D.1.2 and D.1.3IMP RoleTest
    D.2 Status of the IMP to be used in the clinical trial
    D.2.1IMP to be used in the trial has a marketing authorisation No
    D.2.5The IMP has been designated in this indication as an orphan drug in the Community Yes
    D.2.5.1Orphan drug designation numberEU/3/20/2332
    D.3 Description of the IMP
    D.3.1Product nameRetigabine
    D.3.2Product code XEN496
    D.3.4Pharmaceutical form Capsule
    D.3.4.1Specific paediatric formulation Yes
    D.3.7Routes of administration for this IMPOral use
    D.3.8 to D.3.10 IMP Identification Details (Active Substances)
    D.3.8INN - Proposed INNRETIGABINE
    D.3.9.1CAS number 150812-12-7
    D.3.9.2Current sponsor codeXEN496
    D.3.9.3Other descriptive nameezogabine
    D.3.9.4EV Substance CodeSUB10291MIG
    D.3.10 Strength
    D.3.10.1Concentration unit mg milligram(s)
    D.3.10.2Concentration typeequal
    D.3.10.3Concentration number3
    D.3.11 The IMP contains an:
    D.3.11.1Active substance of chemical origin Yes
    D.3.11.2Active substance of biological/ biotechnological origin (other than Advanced Therapy IMP (ATIMP) No
    The IMP is a:
    D.3.11.3Advanced Therapy IMP (ATIMP) No
    D.3.11.3.1Somatic cell therapy medicinal product No
    D.3.11.3.2Gene therapy medical product No
    D.3.11.3.3Tissue Engineered Product No
    D.3.11.3.4Combination ATIMP (i.e. one involving a medical device) No
    D.3.11.3.5Committee on Advanced therapies (CAT) has issued a classification for this product No
    D.3.11.4Combination product that includes a device, but does not involve an Advanced Therapy No
    D.3.11.5Radiopharmaceutical medicinal product No
    D.3.11.6Immunological medicinal product (such as vaccine, allergen, immune serum) No
    D.3.11.7Plasma derived medicinal product No
    D.3.11.8Extractive medicinal product No
    D.3.11.9Recombinant medicinal product No
    D.3.11.10Medicinal product containing genetically modified organisms No
    D.3.11.11Herbal medicinal product No
    D.3.11.12Homeopathic medicinal product No
    D.3.11.13Another type of medicinal product No
    D.IMP: 2
    D.1.2 and D.1.3IMP RoleTest
    D.2 Status of the IMP to be used in the clinical trial
    D.2.1IMP to be used in the trial has a marketing authorisation No
    D.2.5The IMP has been designated in this indication as an orphan drug in the Community Yes
    D.2.5.1Orphan drug designation numberEU/3/20/2332
    D.3 Description of the IMP
    D.3.1Product nameRetigabine
    D.3.2Product code XEN496
    D.3.4Pharmaceutical form Capsule
    D.3.4.1Specific paediatric formulation Yes
    D.3.7Routes of administration for this IMPOral use
    D.3.8 to D.3.10 IMP Identification Details (Active Substances)
    D.3.8INN - Proposed INNRETIGABINE
    D.3.9.1CAS number 150812-12-7
    D.3.9.2Current sponsor codeXEN496
    D.3.9.3Other descriptive nameezogabine
    D.3.9.4EV Substance CodeSUB10291MIG
    D.3.10 Strength
    D.3.10.1Concentration unit mg milligram(s)
    D.3.10.2Concentration typeequal
    D.3.10.3Concentration number12
    D.3.11 The IMP contains an:
    D.3.11.1Active substance of chemical origin Yes
    D.3.11.2Active substance of biological/ biotechnological origin (other than Advanced Therapy IMP (ATIMP) No
    The IMP is a:
    D.3.11.3Advanced Therapy IMP (ATIMP) No
    D.3.11.3.1Somatic cell therapy medicinal product No
    D.3.11.3.2Gene therapy medical product No
    D.3.11.3.3Tissue Engineered Product No
    D.3.11.3.4Combination ATIMP (i.e. one involving a medical device) No
    D.3.11.3.5Committee on Advanced therapies (CAT) has issued a classification for this product No
    D.3.11.4Combination product that includes a device, but does not involve an Advanced Therapy No
    D.3.11.5Radiopharmaceutical medicinal product No
    D.3.11.6Immunological medicinal product (such as vaccine, allergen, immune serum) No
    D.3.11.7Plasma derived medicinal product No
    D.3.11.8Extractive medicinal product No
    D.3.11.9Recombinant medicinal product No
    D.3.11.10Medicinal product containing genetically modified organisms No
    D.3.11.11Herbal medicinal product No
    D.3.11.12Homeopathic medicinal product No
    D.3.11.13Another type of medicinal product No
    D.IMP: 3
    D.1.2 and D.1.3IMP RoleTest
    D.2 Status of the IMP to be used in the clinical trial
    D.2.1IMP to be used in the trial has a marketing authorisation No
    D.2.5The IMP has been designated in this indication as an orphan drug in the Community Yes
    D.2.5.1Orphan drug designation numberEU/3/20/2332
    D.3 Description of the IMP
    D.3.1Product nameRetigabine
    D.3.2Product code XEN496
    D.3.4Pharmaceutical form Capsule
    D.3.4.1Specific paediatric formulation Yes
    D.3.7Routes of administration for this IMPOral use
    D.3.8 to D.3.10 IMP Identification Details (Active Substances)
    D.3.8INN - Proposed INNRETIGABINE
    D.3.9.1CAS number 150812-12-7
    D.3.9.2Current sponsor codeXEN496
    D.3.9.3Other descriptive nameezogabine
    D.3.9.4EV Substance CodeSUB10291MIG
    D.3.10 Strength
    D.3.10.1Concentration unit mg milligram(s)
    D.3.10.2Concentration typeequal
    D.3.10.3Concentration number32
    D.3.11 The IMP contains an:
    D.3.11.1Active substance of chemical origin Yes
    D.3.11.2Active substance of biological/ biotechnological origin (other than Advanced Therapy IMP (ATIMP) No
    The IMP is a:
    D.3.11.3Advanced Therapy IMP (ATIMP) No
    D.3.11.3.1Somatic cell therapy medicinal product No
    D.3.11.3.2Gene therapy medical product No
    D.3.11.3.3Tissue Engineered Product No
    D.3.11.3.4Combination ATIMP (i.e. one involving a medical device) No
    D.3.11.3.5Committee on Advanced therapies (CAT) has issued a classification for this product No
    D.3.11.4Combination product that includes a device, but does not involve an Advanced Therapy No
    D.3.11.5Radiopharmaceutical medicinal product No
    D.3.11.6Immunological medicinal product (such as vaccine, allergen, immune serum) No
    D.3.11.7Plasma derived medicinal product No
    D.3.11.8Extractive medicinal product No
    D.3.11.9Recombinant medicinal product No
    D.3.11.10Medicinal product containing genetically modified organisms No
    D.3.11.11Herbal medicinal product No
    D.3.11.12Homeopathic medicinal product No
    D.3.11.13Another type of medicinal product No
    D.8 Information on Placebo
    D.8 Placebo: 1
    D.8.1Is a Placebo used in this Trial?Yes
    D.8.3Pharmaceutical form of the placeboCapsule
    D.8.4Route of administration of the placeboOral use
    E. General Information on the Trial
    E.1 Medical condition or disease under investigation
    E.1.1Medical condition(s) being investigated
    KCNQ2 Developmental and Epileptic Encephalopathy
    Encéphalopathie épileptique et troubles du développement liés à KCNQ2
    E.1.1.1Medical condition in easily understood language
    KCNQ2 Developmental and Epileptic Encephalopathy
    Encéphalopathie épileptique et troubles du développement liés à KCNQ2
    E.1.1.2Therapeutic area Diseases [C] - Nervous System Diseases [C10]
    MedDRA Classification
    E.1.2 Medical condition or disease under investigation
    E.1.2Version 20.0
    E.1.2Level PT
    E.1.2Classification code 10077380
    E.1.2Term Epileptic encephalopathy
    E.1.2System Organ Class 10029205 - Nervous system disorders
    E.1.3Condition being studied is a rare disease Yes
    E.2 Objective of the trial
    E.2.1Main objective of the trial
    To evaluate the efficacy of XEN496 as adjunctive therapy in reducing seizure frequency compared to placebo in pediatric subjects with KCNQ2-DEE
    Évaluer l’efficacité de XEN496 en traitement adjuvant dans la réduction de la fréquence des convulsions, par rapport au placebo, chez des patients pédiatriques atteints d’EED-KCNQ2.
    E.2.2Secondary objectives of the trial
    • To evaluate the proportion of pediatric subjects with KCNQ2-DEE who achieve a ≥50% reduction from baseline in seizure frequency when taking XEN496, compared with placebo.
    • To evaluate Caregiver Global Impression of Change (CaGI-C) and Caregiver Global Impression of Severity (CaGI-S) scores in pediatric subjects with KCNQ2-DEE taking XEN496, compared with placebo.
    • Évaluer la proportion de patients pédiatriques atteints d’EED-KCNQ2 qui obtiennent une réduction de la fréquence des convulsions ≥ 50 % depuis l’inclusion lorsqu’ils prennent XEN496, par rapport au placebo.
    • Évaluer les scores à l’échelle CaGI-C (Caregiver Global Impression of Change, impression globale de changement de l’aidant) et à l’échelle CaGI-S (Caregiver Global Impression of Severity, impression globale de sévérité de l’aidant) chez des patients pédiatriques atteints d’EED-KCNQ2 prenant XEN496, versus placebo.
    E.2.3Trial contains a sub-study No
    E.3Principal inclusion criteria
    1. Parent(s) or guardian(s) fully comprehends the nature and risks of the study and is able and willing to give informed consent in writing, prior to the subject entering the study, in accordance with local legal requirements.
    2. Male or female subjects aged from 1 month (44 weeks postmenstrual age) to less than 6 years, with a body weight of ≥3.0 kg, at screening (Visit 1).
    3. Documented evidence of a genetic test result from an appropriately accredited laboratory, consistent with a diagnosis of KCNQ2-DEE (pathogenic, likely pathogenic, variant of unknown significance, or inconclusive but unlikely to support an alternate diagnosis).
    4. Seizure onset within 2 weeks after birth and EEG and documented clinical history consistent with KCNQ2-DEE.
    5. Magnetic resonance imaging has been performed and is without evidence of structural abnormalities, including but not limited to, hypoxia, hypoxia-ischemia, ischemia (arterial or venous), stroke, sinovenous thrombosis, intracranial hemorrhage, or focal or global brain malformation.
    6. A sufficient number of focal tonic or other countable motor seizures in the month (28 days) prior to screening, documented by caregiver report or investigator medical notes.
    7. Subjects can be taking 1 and no more than the maximum required number concomitant ASMs. All doses must be stable for the required duration prior to screening and expected to be maintained throughout the duration of the study (until the end of the treatment period).
    8. VNS is allowed and will not be counted as a concomitant ASM. The VNS device must be implanted for at least 6 months before before screening, and the device settings must be stable for the required duration prior to screening and throughout the duration of the study. Use of the VNS device magnet is allowed.
    9. Ketogenic diet is allowed and will not be counted as a concomitant ASM. The subject must be on a stable dietary regimen that produces ketosis for the required period of time prior to screening, and expected to be maintained throughout the study.
    10. In the opinion of the investigator, the caregiver is able and willing to maintain an accurate and complete daily diary to monitor seizures, diaper count (when required) and administration of study drug and concomitant medications.
    1. Le ou les parents ou tuteurs comprennent pleinement la nature et les risques de l’étude et sont aptes et disposés à fournir un consentement éclairé par écrit, avant l’entrée du patient dans l’étude, conformément aux exigences légales locales.
    2. Patients de sexe masculin ou féminin âgés d’un mois (44 semaines d’âge post-menstruel) à moins de 6 ans, dont le poids corporel est ≥ 3,0 kg à la sélection (visite 1).
    3. Résultat d’analyse génétique documenté provenant d’un laboratoire dûment accrédité, compatible avec un diagnostic d’EED-KCNQ2 (variant pathogène, probablement pathogène, de signification inconnue, ou peu concluant, mais peu susceptible d’étayer un diagnostic alternatif).
    4. Survenue de convulsions dans les 2 semaines suivant la naissance et EEG et antécédents cliniques documentés compatibles avec une EED-KCNQ2.
    5. Résultat d’examen d’imagerie par résonnance magnétique ne montrant aucune anomalie structurelle, incluant sans s’y limiter hypoxie, hypoxie-ischémie, ischémie (artérielle ou veineuse), AVC, thrombose des sinus veineux, hémorragie intracrânienne, ou malformation cérébrale globale ou focale.
    6. Survenue de ≥ 4 crises focales toniques ou autres crises motrices dénombrables au cours du mois (28 jours) précédant la sélection, documentées par un rapport de l’aidant ou les notes médicales de l’investigateur.
    7. Les patients peuvent prendre entre 1 et 4 médicaments anticonvulsivants concomitants. Toutes les doses doivent être stables depuis au moins 1 semaine au moment de la sélection et doivent pouvoir être maintenues pendant toute la durée de l’étude (jusqu’à la fin de la période de traitement).
    8. La stimulation neuro-vagale (SNV) est autorisée et n’est pas considérée comme un traitement anticonvulsivant concomitant. Le dispositif de SNV doit être implanté depuis au moins 6 mois au moment de la sélection et les paramètres du dispositif doivent être stables depuis au moins 6 semaines au moment de la sélection et le rester pendant toute la durée de l’étude. L’utilisation de l’aimant du dispositif de SNV est autorisée.
    9. Le régime cétogène est autorisé et n’est pas considéré comme un traitement anticonvulsivant concomitant. Le patient doit suivre un régime alimentaire stable qui induit une cétose depuis au moins 6 semaines au moment de la sélection ; ce régime doit pouvoir être maintenu pendant toute la durée de l’étude.
    10. De l’avis de l’investigateur, l’aidant est apte et disposé à tenir un journal quotidien complet et exact pour surveiller les convulsions, le décompte des couches (le cas échéant) et l’administration du médicament de l’étude et des traitements concomitants.
    E.4Principal exclusion criteria
    1. Presence of a pathogenic or likely pathogenic variant in an additional gene associated with other epilepsy syndromes.
    2. Presence of a known gain-of-function variant in the KCNQ2 gene, or clinical characteristics consistent with previously reported pathogenic gain-of-function variants in the KCNQ2 gene, such as subjects with infantile spasms without a history of neonatal-onset seizures.
    3. Seizures secondary to infection, neoplasia, demyelinating disease, degenerative neurological disease, or CNS disease deemed progressive, metabolic illness, or progressive degenerative disease.
    4. Confirmed diagnosis of infantile spasms within the past month prior to screening.
    5. History or presence of any significant medical or surgical condition or uncontrolled medical illness at screening including, but not limited to, cardiovascular, gastrointestinal, hematologic, hepatic, ocular, pulmonary, renal, or urogenital systems, or other conditions that would not justify the subject’s participation in the study, as determined by the investigator’s risk benefit assessment.
    6. QT interval corrected for heart rate by Fridericia’s formula (QTcF) of >440 msec. In addition, subjects with a history of arrhythmia, prolonged QT, heart disease or subjects taking medications known to increase the QT interval.
    7. History of hyperbilirubinemia, which lasts longer than 1 week will require exclusion of hepatic disease before entering the study.
    8. History of bilirubin-induced neurological dysfunction.
    9. Current disturbance of micturition or known urinary obstructions or history of bladder or urinary dysfunction including abnormal post-void residual bladder ultrasound, vesicoureteral reflux, urinary retention, or required urinary catheterization in the preceding 6 months.
    10. Subjects who are known to have a terminal illness.
    11. Any clinically significant laboratory abnormalities or clinically significant abnormalities on pre-study physical examination, vital signs, or ECG that in the judgment of the investigator indicates a medical problem that would preclude study participation.
    12. Subjects who are planned to begin to follow a ketogenic or other specialized dietary therapy during the study.
    13. Caregiver history of chronic noncompliance with their child’s prescribed drug regimens that has not been corrected.
    14. Exposure to any other investigational drug or device within 5 half-lives or 30 days prior to screening (Visit 1), whichever is longer or plans to participate in another drug or device trial at any time during the study.
    15. Concurrent enrollment in any other type of medical research judged by the investigator not to be scientifically or medically compatible with this study.
    16. Subjects using felbamate who have presented with clinically significant abnormalities and/or hepatic dysfunction during felbamate treatment, and subjects who have taken felbamate for less than 6 months prior to screening
    17. Subjects who are currently taking adrenocorticotropic hormone.
    18. Subjects who did not tolerate ezogabine when taken previously.
    1. Présence d’un variant pathogène ou probablement pathogène dans un gène supplémentaire associé à d’autres syndromes épileptiques.
    2. Présence d’un variant gain de fonction connu dans le gène KCNQ2 ou caractéristiques cliniques compatibles avec des variants gain de fonction pathogènes antérieurement rapportés dans le gène KCNQ2, c’est-à-dire des patients présentant des spasmes infantiles sans antécédents de convulsions néonatales.
    3. Convulsions secondaires à une infection, une néoplasie, une maladie démyélinisante, une maladie neurologique dégénérative ou une maladie du SNC considérée comme progressive, une maladie métabolique ou une maladie dégénérative progressive.
    4. Diagnostic confirmé de spasmes infantiles au cours du mois précédant la sélection.
    5. Antécédents ou présence d’une affection médicale ou chirurgicale significative ou d’une maladie non contrôlée à la sélection comprenant, sans s’y limiter, une affection du système cardiovasculaire, gastro-intestinal, hématologique, hépatique, oculaire, pulmonaire, rénal ou uro-génital ou d’autres affections qui ne justifieraient pas la participation du patient à l’étude, tel que déterminé par l’évaluation des risques et bénéfices de l’investigateur.
    6. Intervalle QT corrigé pour la fréquence cardiaque selon la formule de Fridericia (QTcF) > 440 msec. Par ailleurs, patients présentant des antécédents d’arythmie, de QT prolongé, de maladie cardiaque ou patients prenant des médicaments connus pour augmenter l’intervalle QT.
    7. Des antécédents d’hyperbilirubinémie ayant duré plus d’une semaine nécessiteront l’exclusion d’une maladie hépatique avant l’entrée dans l’étude.
    8. Antécédents de dysfonction neurologique induite par la bilirubine.
    9. Trouble de la miction en cours, obstruction connue des voies urinaires, ou antécédents de dysfonction urinaire ou de la vessie comprenant volume urinaire résiduel post-mictionnel dans la vessie visible à l’échographie, reflux vésico-urétéral, rétention urinaire ou cathétérisation urinaire nécessaire au cours des 6 mois précédents.
    10. Patients atteints d’une maladie en phase terminale.
    11. Toute anomalie biologique cliniquement significative ou toute anomalie cliniquement significative à l’examen clinique avant l’étude, à la mesure des constantes vitales ou à l’ECG qui, de l’avis de l’investigateur, indique un problème médical qui empêcherait la participation à l’étude.
    12. Patients censés commencer un régime cétogène ou autre thérapie alimentaire spécialisée pendant l’étude.
    13. Antécédents de non-respect chronique par l’aidant des schémas thérapeutiques prescrits à l’enfant qui n’ont pas été corrigés.
    14. Exposition à tout autre médicament ou dispositif expérimental au cours des 5 demi-vies ou des 30 jours précédant la sélection (visite 1), l’échéance la plus longue prévalant, ou participation prévue à une autre étude portant sur un médicament ou sur un dispositif médical à tout moment pendant l’étude.
    15. Participation simultanée à tout autre type de recherche médicale jugée scientifiquement ou médicalement incompatible avec cette étude par l’investigateur.
    16. Patients utilisant le felbamate et ayant présenté des anomalies cliniquement significatives et/ou une dysfonction hépatique pendant le traitement par felbamate et patients qui ont pris du felbamate pendant moins de 6 mois avant la sélection.
    17. Patients qui prennent actuellement de l’hormone corticotrope.
    18. Patients qui n’ont pas toléré l’ezogabine prise précédemment.
    E.5 End points
    E.5.1Primary end point(s)
    Percent change from baseline in monthly (28 day) countable motor seizure frequency during the blinded treatment period, as recorded by caregivers in a daily seizure diary.
    Variation en pourcentage de la fréquence des crises motrices dénombrables par mois (28 jours) depuis l’inclusion, pendant la période de traitement en aveugle, telle que consignée par les aidants dans le journal quotidien des convulsions.
    E.5.1.1Timepoint(s) of evaluation of this end point
    The baseline average frequency (per 28 days) will use seizures counted during the baseline period, consist of all evaluable data up to 6 weeks prior to the date of 1st study drug date. The double-blind treatment period will start from the 1st study drug date through Visit 22 (end of treatment study visit), or double-blind treatment termination date, whichever is earlier. Also, seizure data collected after the change in background antiseizure medication (ASM) will be excluded as well.
    La fréquence moyenne de référence (par 28 jours) utilisera le nombre de crises comitiales comptées au cours de la période de référence et comprendra toutes les données évaluables jusqu’à 6 semaines avant la date de 1re administration du médicament de l’étude. La période de traitement en double insu commencera à la date de 1re administration du médicament de l’étude jusqu’à la date de la Visite 22 (visite d’étude de fin de traitement) ou jusqu’à la date d’arrêt du traitement en double insu, la plus précoce des deux dates étant retenue. Les données sur les crises comitiales recueillies après le changement du médicament anticomitial (MAC) de fond seront également exclues.
    E.5.2Secondary end point(s)
    • Proportion of subjects with ≥50% reduction in monthly (28 day) seizure frequency from baseline.
    • Caregiver Global Impression of Changescores (CaGI-C) for the subject’s overall condition and for seizures.
    • Change from baseline in Caregiver Global Impression of Severity (CaGI-S) for the subject’s overall condition and for seizures.
    • Proportion de patients présentant une diminution ≥ 50 % de la fréquence mensuelle (28 jours) des convulsions depuis l’inclusion.
    • Scores à l’échelle CaGI-C relative à l’état global du patient et aux convulsions.
    • Variation depuis l’inclusion des scores à l’échelle CaGI-S relative à l’état global du patient et aux convulsions.
    E.5.2.1Timepoint(s) of evaluation of this end point
    • The key secondary efficacy endpoint is the proportion of subjects with ≥50% reduction in seizure frequency from baseline, derived based on the primary endpoint of percent change from baseline in monthly seizure frequency. The analysis will also be performed based on data in maintenance period only.
    • The CaGI-C will be summarized at each of the post-baseline visit.
    • The CaGI-S for overall condition and seizure severity will be summarized by treatment group at baseline and each of the post-baseline visit, by assessing the number and percent of patients who changed from baseline to each of the post-baseline categories.
    • Prcpal critère d’évaluation 2ndaire de l’efficacité: pourcentage de patients ayant une réduction de 50 % ou plus de la fréq des crises par rapport à la val de référence, calculée à partir du critère d’évaluation prcpal du changement dans le pourcentage de la fréq des crises comitiales mensuelles par rapport à la val de référence. Une analyse portera uniquement sur les données de la période de traitement d’entretien.
    • L’échelle CaGI-C sera résumée à chaque visite suivant l’inclusion dans l’étude.
    • L’échelle CaGI-S pour l’état de santé global et pour la sévérité des crises comitiales sera résumée par groupe de traitement à l’inclusion et après chaque visite post-inclusion en évaluant le nbre et le pourcentage de patients passés depuis l’inclusion dans chaque catégorie post-inclusion.
    E.6 and E.7 Scope of the trial
    E.6Scope of the trial
    E.6.1Diagnosis No
    E.6.2Prophylaxis No
    E.6.3Therapy Yes
    E.6.4Safety Yes
    E.6.5Efficacy Yes
    E.6.6Pharmacokinetic Yes
    E.6.7Pharmacodynamic Yes
    E.6.8Bioequivalence No
    E.6.9Dose response No
    E.6.10Pharmacogenetic No
    E.6.11Pharmacogenomic No
    E.6.12Pharmacoeconomic No
    E.6.13Others Yes
    E.6.13.1Other scope of the trial description
    tolerability
    E.7Trial type and phase
    E.7.1Human pharmacology (Phase I) No
    E.7.1.1First administration to humans No
    E.7.1.2Bioequivalence study No
    E.7.1.3Other No
    E.7.1.3.1Other trial type description
    E.7.2Therapeutic exploratory (Phase II) No
    E.7.3Therapeutic confirmatory (Phase III) Yes
    E.7.4Therapeutic use (Phase IV) No
    E.8 Design of the trial
    E.8.1Controlled Yes
    E.8.1.1Randomised Yes
    E.8.1.2Open No
    E.8.1.3Single blind No
    E.8.1.4Double blind Yes
    E.8.1.5Parallel group Yes
    E.8.1.6Cross over No
    E.8.1.7Other No
    E.8.2 Comparator of controlled trial
    E.8.2.1Other medicinal product(s) No
    E.8.2.2Placebo Yes
    E.8.2.3Other No
    E.8.2.4Number of treatment arms in the trial2
    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.8.4.1Number of sites anticipated in Member State concerned3
    E.8.5The trial involves multiple Member States Yes
    E.8.5.1Number of sites anticipated in the EEA15
    E.8.6 Trial involving sites outside the EEA
    E.8.6.1Trial being conducted both within and outside the EEA Yes
    E.8.6.2Trial being conducted completely outside of the EEA No
    E.8.6.3If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned
    Australia
    Canada
    China
    United States
    Belgium
    France
    Germany
    Italy
    Poland
    Spain
    E.8.7Trial 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 study is defined as completion of the last visit for the last subject in this study.
    La fin de l’étude est définie par la fin de la dernière visite du dernier patient dans l’étude.
    E.8.9 Initial estimate of the duration of the trial
    E.8.9.1In the Member State concerned years1
    E.8.9.1In the Member State concerned months
    E.8.9.1In the Member State concerned days14
    E.8.9.2In all countries concerned by the trial years1
    E.8.9.2In all countries concerned by the trial months9
    E.8.9.2In all countries concerned by the trial days2
    F. Population of Trial Subjects
    F.1 Age Range
    F.1.1Trial has subjects under 18 Yes
    F.1.1Number of subjects for this age range: 40
    F.1.1.1In Utero No
    F.1.1.2Preterm newborn infants (up to gestational age < 37 weeks) No
    F.1.1.3Newborns (0-27 days) No
    F.1.1.4Infants and toddlers (28 days-23 months) Yes
    F.1.1.4.1Number of subjects for this age range: 20
    F.1.1.5Children (2-11years) Yes
    F.1.1.5.1Number of subjects for this age range: 20
    F.1.1.6Adolescents (12-17 years) No
    F.1.2Adults (18-64 years) No
    F.1.3Elderly (>=65 years) No
    F.2 Gender
    F.2.1Female Yes
    F.2.2Male Yes
    F.3 Group of trial subjects
    F.3.1Healthy volunteers No
    F.3.2Patients Yes
    F.3.3Specific vulnerable populations Yes
    F.3.3.1Women of childbearing potential not using contraception No
    F.3.3.2Women of child-bearing potential using contraception No
    F.3.3.3Pregnant women No
    F.3.3.4Nursing women No
    F.3.3.5Emergency situation No
    F.3.3.6Subjects incapable of giving consent personally Yes
    F.3.3.6.1Details of subjects incapable of giving consent
    parent(s)/guardian(s) agreement for their child to participate in the study is required
    F.3.3.7Others No
    F.4 Planned number of subjects to be included
    F.4.1In the member state3
    F.4.2 For a multinational trial
    F.4.2.1In the EEA 20
    F.4.2.2In the whole clinical trial 40
    F.5 Plans for treatment or care after the subject has ended the participation in the trial (if it is different from the expected normal treatment of that condition)
    Subjects may be considered for an open-label long-term extension (under a separate study protocol) if they meet the protocol-specified requirements.
    G. Investigator Networks to be involved in the Trial
    N. Review by the Competent Authority or Ethics Committee in the country concerned
    N.Competent Authority Decision Authorised
    N.Date of Competent Authority Decision2021-10-29
    N.Ethics Committee Opinion of the trial application
    N.Ethics Committee Opinion: Reason(s) for unfavourable opinion
    N.Date of Ethics Committee Opinion
    P. End of Trial
    P.End of Trial StatusCompleted
    P.Date of the global end of the trial2023-05-16
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