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Metformine pour la réparation du cerveau chez les enfants atteints de radiothérapie crânio-rachidienne pour médulloblastome

21 septembre 2026 mis à jour par: Donald Mabbott, The Hospital for Sick Children

Essai croisé en double aveugle contrôlé par placebo sur la metformine pour la réparation du cerveau chez les enfants ayant subi une radiothérapie crânio-rachidienne pour un médulloblastome

A placebo controlled double blind crossover trial of metformin in 30 children treated with radiation for medulloblastoma - the most common malignant brain tumour. The investigators used tests of thinking and learning and brain imaging techniques to examine whether metformin can enhance cognition or promote brain repair following radiation-induced brain injury.

Aperçu de l'étude

Statut

Complété

Les conditions

Intervention / Traitement

Description détaillée

We conducted a pilot randomized, double-blind, placebo-controlled trial with crossover in survivors of pediatric brain tumors with primary endpoints of safety and feasibility and secondary endpoints of cognitive and magnetic resonance imaging (MRI) measures. Twenty-four participants were enrolled and randomly assigned to complete 12-week cycles of metformin (A) and placebo (B) in either a group AB (AB) or group BA (BA) sequence. At the point of crossover, there was a 10-week washout period in which neither group received any treatment. During the first week of each treatment cycle, a daily dose of 500 mg/m2 of metformin or placebo was administered orally. The dose was increased to 1000mg/m2 daily beginning in the second week and continuing for the remainder of the 12-week cycle.

Test procedures (Clinical & current medications reviews, Blood draws, and MRI and Cognitive testing) were performed at 4 times points during the study: 1. at study entry (Baseline 1), 2. after 12 weeks of treatment (Outcome 1), 3. after a 10-week washout period at 22 weeks (Baseline 2), and 4. At the end of the trial at 34 weeks (Outcome 2).

Type d'étude

Interventionnel

Inscription (Réel)

24

Phase

  • Phase 3

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Lieux d'étude

  • Canada
    • Ontario
      • Toronto, Ontario, Canada, M5G 1X8
        • The Hospital for Sick Children

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

5 ans à 21 ans (Enfant, Adulte)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

Inclusion criteria: Survivors will be included if they:

  1. Have been treated with cranial or cranial-spinal radiation,

  2. Are between 5 and 21 years of age at time of consent, and

  3. Either declare English as their native language or have had at least two years of schooling in English at the time of their baseline assessment.

  4. Have been diagnosed with a brain tumour requiring treatment with cranial or cranial-spinal radiation at least 2 years ago, is not receiving active treatment and no more than 15 years may have elapsed between treatment with cranial-spinal radiation and time of the trial. Survivors with a shunt will be included in the trial, but will need to be identified prior to study enrollment to discuss any specific considerations for imaging.

  5. Meet criteria for adequate organ function requirements:

    1. Adequate renal function defined as: Creatinine clearance or radioisotope glomerular filtration rate (GFR) > 70ml/min/1.73 m2 or serum creatinine based on age/gender as follows:

      Maximum Serum Creatinine Level (mg/dL)

      5 to < 10 years: Male = 1; Female = 1

      10 to < 13 years: Male = 1.2; Female = 1.2

      13 to < 16 years: Male = 1.5; Female = 1.4

      ≥ 16 years: Male = 1.7; Female = 1.4

    2. Adequate liver function defined as:

    Total bilirubin < 1.5 x upper limit of normal (ULN) for age, and,

    serum glutamate oxaloacetate transaminase (SGOT) (AST) or serum glutamate pyruvate transaminase (SGPT) (ALT) < 3 x upper limit of normal (ULN) for age.

  6. Females of childbearing potential must have a negative pregnancy test result and must agree to use a medically acceptable method of contraception throughout the entire study period and for 30 days after the last dose of study drug.

  7. Informed consent will be obtained from the participants and/or their legal guardians by study team members authorized to consent for this study.

Exclusion criteria: Survivors will be excluded if they

  1. Are receiving palliative care.
  2. Are unable to participate in neuro-imaging without sedation as this is the primary outcome measure for the trial.
  3. Are unable to swallow tablets.
  4. Are unstable and/or insulin-dependent (Type 1) diabetic patients.
  5. Have acute or chronic metabolic acidosis and/or lactic acidosis.
  6. Any female patient or partner who has reached menarche and male patients who are not willing to use an effective method of contraception.
  7. Patient who is pregnant or lactating and does not agree to stop breastfeeding while receiving trial treatment.
  8. Have a history of renal disease or renal dysfunction e.g., as suggested by elevated serum creatinine levels (see 5.a. Inclusion criteria) or abnormal creatinine clearance.
  9. Have a history of congestive heart failure requiring pharmacologic treatment.
  10. Have a known hypersensitivity to metformin hydrochloride.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation croisée
  • Masquage: Quadruple

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: Group A (Crossover Group 1)

Subjects assigned to this arm will receive metformin first, followed by a washout period and then placebo.
Médicament: Metformin

Metformin doses will be 500 mg/m2 po daily given in 2 doses for one week and if there are no concerns increased to 1000 mg/m2 po daily given in 2 doses for the rest of the 12 week trial. The investigators will use the closest dose according to body surface area (250-500-750-1000) BID.

Médicament: Placebo

Placebo doses will be 500 mg/m2 po daily given in 2 doses for one week and if there are no concerns increased to 1000 mg/m2 po daily given in 2 doses for the rest of the 12 week trial. The investigators will use the closest dose according to body surface area (250-500-750-1000) BID.
Expérimental: Group B (Crossover Group 2)

Subjects assigned to this arm will receive placebo first, followed by a washout period and then metformin.
Médicament: Metformin

Metformin doses will be 500 mg/m2 po daily given in 2 doses for one week and if there are no concerns increased to 1000 mg/m2 po daily given in 2 doses for the rest of the 12 week trial. The investigators will use the closest dose according to body surface area (250-500-750-1000) BID.

Médicament: Placebo

Placebo doses will be 500 mg/m2 po daily given in 2 doses for one week and if there are no concerns increased to 1000 mg/m2 po daily given in 2 doses for the rest of the 12 week trial. The investigators will use the closest dose according to body surface area (250-500-750-1000) BID.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Feasibility: Medication Adherence
Délai: Outcome 2 (Week 35)

Participant's adherence to taking study medication (Metformin or Placebo) as instructed based on dosing nomogram, for the whole study.

% Medication adherence = (Number of tablets actually consumed / Number of tablets expected to be consumed)*100

Number of tablets actually consumed is based on compliance counts conducted at the end of the study.
Outcome 2 (Week 35)
Safety: Frequency of Adverse Events (AE)
Délai: Outcome 2 (Week 35)

The frequency of all AEs experienced during metformin and placebo treatment for all participants.
Outcome 2 (Week 35)

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Cognitive Testing: Declarative Memory - Change in Children's Auditory Verbal Learning Test -2 (CAVLT-2)
Délai: Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), and Outcome 2 (Week 35)

For Arm AB:

  1. Change in Immediate Recall test from Baseline 1 (Week 1) at Outcome 1 (Week 13, post 12-week intervention)
  2. Change in Immediate Recall test from Baseline 2 (Week 23, post 10-week washout) at Outcome 2 (Week 35, post 2nd 12-week intervention)
  3. Change in Immediate Recall test from Baseline 1 (Week 1) at Outcome 2 (Week 35, post 2nd 12-week intervention)

For Arm BA:

  1. Change in Immediate Recall test from Baseline 1 (Week 1) at Outcome 1 (Week 13)
  2. Change in Immediate Recall test from Baseline 2 (Week 23) at Outcome 2 (Week 35)
  3. Change in Immediate Recall test from Baseline 1 (Week 1) at Outcome 2 (Week 35)
Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), and Outcome 2 (Week 35)
Cognitive Testing: Working Memory - Change in List Sort Working Memory Subtest of the NIH Toolbox Cognition Battery
Délai: Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), Outcome 2 (Week 35)

For Arm AB:

  1. Change in List Sort Working Memory Test from Baseline 1 (Week 1) at Outcome 1 (Week 13)
  2. Change in List Sort Working Memory Test from Baseline 2 (Week 23) at Outcome 2 (Week 35)
  3. Change in List Sort Working Memory Test from Baseline 1 (Week 1) at Outcome 2 (Week 35)

For Arm BA:

  1. Change in List Sort Working Memory Test from Baseline 1 (Week 1) at Outcome 1 (Week 13)
  2. Change in List Sort Working Memory Test from Baseline 2 (Week 23) at Outcome 2 (Week 35)
  3. Change in List Sort Working Memory Test from Baseline 1 (Week 1) at Outcome 2 (Week 35)
Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), Outcome 2 (Week 35)
Cognitive Testing: Processing Speed - Change in Mean Reaction Time across Cambridge Neuropsychological Test Automated Battery (CANTAB) subtests
Délai: Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), and Outcome 2 (Week 35)

Change in Mean Reaction Time (MRT) across the following CANTAB subtests:

  1. Rapid Visual Information Processing (RVP)
  2. Reaction Time (RT)
  3. Match to Sample Visual Search (MTS)
  4. Delayed Matching in sample (DMS)

Each subtest provides an outcome measure of response latency, which will be averaged across all correct trials for each subtest to provide an overall measure of processing speed.

For Arm AB:

  1. Change in MRT from Baseline 1 (Week 1) at Outcome 1 (Week 13)
  2. Change in MRT from Baseline 2 (Week 23) at Outcome 2 (Week 35)
  3. Change in MRT from Baseline 1 (Week 1) at Outcome 2 (Week 35)

For Arm BA:

  1. Change in MRT from Baseline 1 (Week 1) at Outcome 1 (Week 13)
  2. Change in MRT from Baseline 2 (Week 23) at Outcome 2 (Week 35)
  3. Change in MRT from Baseline 1 (Week 1) at Outcome 2 (Week 35)
Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), and Outcome 2 (Week 35)

Autres mesures de résultats

Mesure des résultats
Description de la mesure
Délai
Neuroimaging: MRI Measures of White Matter Growth within the Corpus Callosum
Délai: Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), and Outcome 2 (Week 35)

Change in Axonal Water Fraction (AWF)- Diffusion Kurtosis Imaging (DKI) metric sensitive to myelin
Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), and Outcome 2 (Week 35)
Neuroimaging: MRI Measures of Hippocampal Volume
Délai: Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), and Outcome 2 (Week 35

Change in Hippocampal Volume, as measured by Cerebral Blood Flow (CBF)
Baseline 1 (Week 1), Outcome 1 (Week 13), Baseline 2 (Week 23), and Outcome 2 (Week 35

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

The Hospital for Sick Children

Les enquêteurs

  • Chercheur principal: Donald Mabbott, PhD, The Hospital for Sick Children

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

13 juin 2014

Achèvement primaire (Réel)

15 décembre 2017

Achèvement de l'étude (Réel)

15 décembre 2017

Dates d'inscription aux études

Première soumission

7 janvier 2014

Première soumission répondant aux critères de contrôle qualité

15 janvier 2014

Première publication (Estimé)

20 janvier 2014

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

24 septembre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

21 septembre 2026

Dernière vérification

1 septembre 2026

Plus d'information

Termes liés à cette étude

Mots clés

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • 1000039383

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

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