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L'étude ENERGY 3 : évaluation de l'efficacité et de l'innocuité de l'INZ-701 chez les enfants présentant un déficit en ENPP1

28 septembre 2026 mis à jour par: Inozyme Pharma

L'étude ENERGY 3 : une étude de phase 3 randomisée, contrôlée et ouverte pour évaluer l'efficacité et l'innocuité de l'INZ-701 chez les enfants présentant un déficit en ectonucléotide pyrophosphatase/phosphodiestérase 1 (ENPP1)

The primary purpose of Study INZ701-106 (The ENERGY 3 Study) is to assess the efficacy and safety of INZ-701 in children with ENPP1 Deficiency.

Aperçu de l'étude

Statut

Résilié

Les conditions

Intervention / Traitement

Description détaillée

INZ-701 is an ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) enzyme replacement therapy (ERT) in development for the treatment of ENPP1 Deficiency, an ultra-rare genetic disorder with an incidence of 1 in 64,000 pregnancies.

Study INZ701-106 (The ENERGY 3 Study) is a multi-center, randomized in a 2:1 ratio, controlled, open-label Phase 3 study to evaluate the efficacy and safety of INZ-701 in children with ENPP1 Deficiency.

The study will consist of a Screening Period of up to 52 days (including a washout period of up to 7 days for prohibited medications post-Randomization) and a Randomized Treatment Period (INZ-701 or control) of 52 weeks, followed by an Open-label Extension Period during which all study participants may receive INZ-701, and an End of Study (EOS) Safety visit 30 days after the last dose of INZ-701.

Type d'étude

Interventionnel

Inscription (Réel)

27

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

  • Arabie Saoudite
      • Riyadh, Arabie Saoudite, 12713
        • King Faisal Specialist Hospital and Research Centre
  • Australie
      • South Brisbane, Australie, 4101
        • Queensland Children's Hospital
  • Canada
      • Montreal, Canada, H3T 1C5
        • Centre Hospitalier Universitaire (CHU) Sainte-Justine
  • Emirats Arabes Unis
      • Dubai, Emirats Arabes Unis, 30726
        • Al Jalila Children's Specialty Hospital
  • France
      • Le Kremlin-Bicêtre, France, 94270
        • Hôpital Bicêtre, Service d'endocrinologie et diabète de l'enfant (Childhood Endocrinology and Diabetes Department)
  • Royaume-Uni
      • Manchester, Royaume-Uni, M13 9WL
        • Royal Manchester Children's Hospital
  • Turquie (Türkiye)
      • Istanbul, Turquie (Türkiye), 34764
        • Umraniye Training and Research Hospital
      • Sarıçam, Turquie (Türkiye), 01330
        • Cukurova Universitesi Tip Fakultesi
  • États-Unis
    • Illinois
      • Chicago, Illinois, États-Unis, 60611
        • Ann & Robert H. Lurie Children's Hospital
    • Pennsylvania
      • Philadelphia, Pennsylvania, États-Unis, 19104
        • The Children's Hospital of Philadelphia
    • Texas
      • Fort Worth, Texas, États-Unis, 76104
        • Cook Children's Medical Center

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

1 an à 12 ans (Enfant)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria

Study participants must meet all of the following inclusion criteria:

  1. Caregiver's written informed consent after the nature of the study has been explained, and prior to any research-related procedures, per International Conference on Harmonisation (ICH) Good Clinical Practice (GCP)
  2. Study participant's assent in accordance with local regulations
  3. A confirmed postnatal molecular genetic diagnosis of ENPP1 Deficiency with biallelic mutations (ie, homozygous or compound heterozygous) performed by a College of American Pathologists/Clinical Laboratory Improvement Amendments (CAP/CLIA) certified laboratory or regional equivalent
  4. Males and females ≥1 year and <13 years of age at Study Day 1
  5. Open growth plates of the distal femur and proximal tibia in both legs
  6. Plasma PPi concentration of <1400 nM at Screening
  7. 25(OH)D levels of ≥12 ng/mL at Screening
  8. Radiographic evidence of skeletal abnormalities based on an RSS ≥2
  9. Women of childbearing potential (WOCBP, as defined in Clinical Trials Coordination Group [CTCG 2024]) must have a negative serum pregnancy test at Screening and must not be breastfeeding
  10. Males who are sexually active must agree to use condoms from the period following first dose of INZ-701 through 30 days after the last dose of INZ-701
  11. WOCBP and partners of fertile males who are WOCBP must be using or must agree to use a highly effective form of (as per CTCG) from at least 1 month before the first dose of INZ-701 through 30 days after the last dose of INZ-701 (greater than 5 half-lives of INZ-701)
  12. In the opinion of the Investigator, able to complete all aspects of the study

Exclusion Criteria

Study participants meeting any of the following exclusion criteria will not be eligible to participate in the study:

  1. In the opinion of the Investigator, has clinically significant disease or laboratory abnormality not associated with ENPP1 Deficiency that will preclude study participation and/or may confound the interpretation of study results
  2. If receiving any of the following prohibited medications as indicated in the protocol: systemic corticosteroids (>5 mg prednisone equivalent per day), anti-FGF23 and oral and/or IV bisphosphonates
  3. Unable or unwilling to discontinue calcitriol or other active forms of vitamin D3 (or analogs) within 7 days prior to Study Day 1 and/or oral phosphate supplements within 36 hours prior to Study Day 1 if randomized to the INZ-701 arm
  4. Planned orthopedic surgery or other procedures that may confound the interpretation of study results during the 52-week RTP
  5. Known intolerance to INZ-701 or any of its excipients
  6. A positive COVID-19 test within 5 days prior to Randomization, only if required as per local regulations or institutional policy
  7. Previous treatment with INZ-701
  8. Concurrent participation in another interventional clinical study and/or has received an investigational drug within 5 half-lives of the last dose or within 4 weeks prior to the first dose of INZ-701, whichever is longer, or use of an investigational device

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 parallèle
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: INZ-701

Subjects randomized to the INZ-701 arm will be administered a 2.4 mg/kg once weekly dose by subcutaneous (SC) injection for the duration of the 52-week Randomized Treatment Period (RTP). RTP will be followed by a Low-dose Open-label Extension Period during which all study participants will receive INZ-701 at a dose of 2.4 mg/kg QW while the primary analysis is pending. If dose escalation criteria are met, all participants will transition to the Randomized Extension Period (REP) where participants who were originally randomized to INZ-701 during RTP will transition to a higher dose regimen of INZ-701 at 1.8 mg/kg twice weekly. Participants who were originally randomized to the active control arm during RTP will continue receiving INZ-701 at 2.4 mg/kg QW in the REP.
Médicament: INZ-701

Recombinant fusion protein that contains the extracellular domains of human ENPP1 coupled with an Fc fragment from an immunoglobulin gamma-1 (IgG1) antibody.

Autres noms:
  • (rhENPP1-Fc).
Comparateur actif: Control Arm (Conventional Therapy)

Subjects randomized to the control arm will continue taking their conventional therapy as clinically indicated by their treating physician for the duration of the 52-week Randomized Treatment Period.
Médicament: Control Arm (Conventional Therapy)

Conventional therapy is defined as oral phosphate supplements and calcitriol or other active forms of vitamin D3 (or analogs). No other agents for treatment of ENPP1 Deficiency are allowed in the control arm.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Change from Baseline in Plasma Inorganic Pyrophosphate (PPi) concentration through Week 52
Délai: 52 weeks (Baseline through Week 52)

For each subject, plasma PPi will be measured via a series of blood samples obtained throughout the study, comparing the subject's baseline value over time.
52 weeks (Baseline through Week 52)
Change from Baseline in skeletal abnormalities as measured by the Radiographic Global Impression of Change (RGI-C) global score through Week 52
Délai: 52 weeks (Baseline through Week 52)

The RGI-C is an overall radiographic score which can be used to monitor response to a therapeutic intervention comparing scores from 2 time points. A determination of healing on a scale of 0 to +3 with 0 being no change or healing and +3 being complete healing; worsening is also measured on a scale of 0 to -3 with 0 being no change and -3 being severe worsening.
52 weeks (Baseline through Week 52)

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Change from Baseline in rickets as measured by Rickets Severity Score (RSS) total score through Week 52
Délai: Baseline, Week 26, Week 52

The RSS assesses rickets severity by utilizing a scoring system that uses a scale from 0 to 4 for the wrists and 0 to 6 for the knees, to generate a total score of 0 to 10, where 0 is normal and 10 is the worst score possible ie, most severe skeletal abnormalities observed radiographically.
Baseline, Week 26, Week 52
Change from Baseline in growth Z-score (height/body length and weight) through Week 52
Délai: Baseline, Day 29, Week 8, Week 13, Week 26, Week 39, Week 52

A Z-score represents the degree to which that particular measurement for that individual differs from the reference value in the general population.

(height/body length and weight) through Week 52
Baseline, Day 29, Week 8, Week 13, Week 26, Week 39, Week 52
Area under the Plasma Concentration versus Time Curve (AUC) of INZ-701
Délai: 52 weeks (Randomized Treatment Period)

For each subject, variation of concentration of INZ-701 in the plasma will be measured via a series of blood samples obtained throughout the study, comparing the subject's baseline value over time.
52 weeks (Randomized Treatment Period)
Maximum Plasma Concentration (Cmax) of INZ-701
Délai: 52 weeks (Randomized Treatment Period)

For each subject, the maximum concentration of INZ-701 in the plasma will be measured via a series of blood samples obtained throughout the study, comparing the subject's baseline value over time.
52 weeks (Randomized Treatment Period)
Change from Baseline in ENPP1 activity (µM/min) through week 52
Délai: 52 weeks (Randomized Treatment Period)

For each subject, the activity of INZ-701 (µM/min) in the serum will be assessed through hydrolysis of a substrate to the enzyme, via a series of blood samples obtained throughout the study, comparing the subject's baseline value over time.
52 weeks (Randomized Treatment Period)

Collaborateurs et enquêteurs

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

Parrainer

Inozyme Pharma

Collaborateurs

BioMarin Pharmaceutical

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)

5 novembre 2023

Achèvement primaire (Réel)

29 janvier 2026

Achèvement de l'étude (Réel)

19 août 2026

Dates d'inscription aux études

Première soumission

28 août 2023

Première soumission répondant aux critères de contrôle qualité

18 septembre 2023

Première publication (Réel)

21 septembre 2023

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

1 octobre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

28 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

  • INZ701-106

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

Étudie un produit pharmaceutique réglementé par la FDA américaine

Oui

Étudie un produit d'appareil réglementé par la FDA américaine

Non

produit fabriqué et exporté des États-Unis.

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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