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PROPEL – Ein prospektives beobachtendes Patientenregister zur Bewertung des ENPP1- und ABCC6-Mangels

28. September 2026 aktualisiert von: Inozyme Pharma

Ein prospektives beobachtendes Patientenregister zur Bewertung des Krankheitsverlaufs bei Patienten mit ENPP1-Mangel und ABCC6-Mangel im Säuglingsalter (GACI Typ 2)

The purpose of this prospective registry is to characterize the natural history of ectonucleotide pyrophosphatase/phosphodiesterase1(ENPP1) Deficiency and the infantile-onset form of adenosine triphosphate (ATP) binding cassette transporter protein subfamily C member 6 (ABCC6) Deficiency longitudinally. The registry will prospectively gather information about the genetic, biochemical, physiological, anatomic, radiographic, and functional manifestations (including patient reported outcomes [PROs]) of each disease during routine, standard-of-care visits, with the aim of developing a comprehensive understanding of the burden of illness and progressive nature of the disease.

Studienübersicht

Status

Beendet

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

ENPP1 Deficiency is a rare, genetic disorder caused by inactivating mutations in the ENPP1 gene that encodes the ENPP1 enzyme. Infantile-onset ENPP1 Deficiency has a high mortality (approximately 50%) in the first 0 to 6 months of life, a result of downstream cardiopulmonary complications. Pediatric patients with ENPP1 Deficiency typically experience rickets, a condition also known as autosomal-recessive hypophosphatemic rickets type 2 (ARHR2), while adults experience osteomalacia (softened bones), and they can exhibit a range of signs and symptoms that include hearing loss, arterial calcification, and cardiac and/or neurological involvement.

Like ENPP1 Deficiency, infantile-onset ABCC6 Deficiency is a rare, genetic disorder caused by mutations in the ABCC6 gene. Infantile-onset of ABCC6 Deficiency resembles the acute infantile form of ENPP1 Deficiency. Pediatric patients with biallelic or monoallelic ABCC6 mutations can present with cerebrovascular disease.

This is an international, multicenter, prospective, non-interventional, observational registry of patients with biallelic variants in ENPP1, symptomatic patients with monoallelic ENPP1 variants and the infantile-onset form of ABCC6 Deficiency (<18 years of age). The registry will include patients with ENPP1 Deficiency or infantile-onset of ABCC6 Deficiency independent of treatment regimen. Note: patients participating in an INZ-701 interventional clinical study are not eligible.

Registry participation will consist of a Screening Period and an Observational Period. During the Screening Period, both retrospective data (past medical history) and data available at the time of consent (baseline visit) will be collected. Data collected will include standard of care assessments, which may consist of any or all of the following: laboratory testing, radiographical assessment of calcification and vascular stenosis, bone mineralization, with addition of performance outcomes, patient-, caregiver-, and physician-reported outcomes, and healthcare utilization. During the Observational Period, participants will be assessed during their routine visits for changes in their disease and PROs and data will be added periodically to the database. There will be an opportunity for an optional blood draw to assess levels of inorganic pyrophosphate (PPi) at each routine visit.

Studientyp

Beobachtungs

Einschreibung (Tatsächlich)

54

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

      • Hamburg, Deutschland, 20251
        • Universitätsklinikum Hamburg-Eppendorf
      • Milan, Italien, 20132
        • IRCCS San Raffaele Hospital - Main
      • Tokyo, Japan, 113-8655
        • The University of Tokyo Hospital
    • Quebec
      • Montreal, Quebec, Kanada, H3T1C5
        • CHU Sainte-Justine Research Centre
      • Muscat, Oman
        • Royal Hospital Muscat
      • Barcelona, Spanien, 08029
        • EU Hub - VCTC
      • Barcelona, Spanien, 08950
        • Hospital Sant Joan de Deu
      • Istanbul, Türkei (türkiye), 34764
        • Umraniye Training and Research Hospital
    • Illinois
      • Chicago, Illinois, Vereinigte Staaten, 60611
        • Ann and Robert H. Lurie Children's Hospital
    • Massachusetts
      • Boston, Massachusetts, Vereinigte Staaten, 02115
        • Boston Children's Hospital
    • Minnesota
      • Rochester, Minnesota, Vereinigte Staaten, 55905
        • Mayo Clinic
    • New Jersey
      • Eatontown, New Jersey, Vereinigte Staaten, 07724
        • CLINILABS Drug Development Corp
    • Pennsylvania
      • Philadelphia, Pennsylvania, Vereinigte Staaten, 19104
        • The Children's Hospital of Philadelphia (CHOP)
      • Derby, Vereinigtes Königreich, DE11 7AQ
        • VCTC

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Kind
  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

Evidence of biallelic ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) variants in ENPP1 Deficiency

or

Evidence of monoallelic ENPP1 variants and disease-related symptoms

or

Infantile onset with biallelic adenosine triphosphate (ATP) binding cassette transporter protein subfamily C member 6 (ABCC6) variants in participants aged <18 years.

Beschreibung

Inclusion Criteria:

Individuals eligible to participate must meet all the following inclusion criteria:

  1. Must provide written or electronic consent after the nature of the registry has been explained, and prior to any research-related procedures, per International Council for Harmonisation (ICH) Good Clinical Practice (GCP)

  2. Agree to provide access to relevant medical records

  3. One of the following genetic or clinical criteria

    1. A confirmed prenatal or 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

      OR

    2. Monoallelic ENPP1 mutation confirmed by a certified CAP/CLIA laboratory or regional equivalent and any of the following clinical symptoms:

    i. ≥ 1 traumatic vertebral fracture

ii. ≥ 2 fractures as an adult (eg, long-bones, digits, vertebrae)

iii. Low bone mineral density (dual-energy X-ray absorptiometry [DXA] Z-score <1.5) and <55 years of age

iv. Bone or joint pain interfering with movement or daily activities

v. History of myocardial infarction (MI), unstable angina, transient ischemic attack (TIA) or low cardiac output before the age of 40 yrs.

vi. History of rickets or bone deformity

vii. Diagnosis of ossification of the posterior longitudinal ligament (OPLL)

viii. Other clinical symptoms, with approval by Inozyme

OR

c. A confirmed prenatal or postnatal molecular genetic diagnosis of ABCC6 Deficiency with biallelic mutations confirmed by a certified CAP/CLIA laboratory or regional equivalent, and <18 years of age

Exclusion Criteria:

Individuals who meet the following exclusion criteria will not be eligible to participate:

  1. Participant or their legally designated representative does not have the cognitive capacity to provide informed consent

  2. Patients who are currently participating in an INZ-701 interventional clinical study, with the exception of expanded access programs and long-term safety follow-up studies

    1. Participants in interventional studies may be approached for inclusion in the registry once their involvement in the treatment period of the clinical study has been completed

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Beobachtungsmodelle: CASE_ONLY
  • Zeitperspektiven: PROSPECTIVE

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Characterization of the natural history of ENPP1 Deficiency and the infantile-onset form of ABCC6 Deficiency longitudinally
Zeitfenster: Annually up to 10 years

Assessments will be collected during each subject's routine visit. The assessments will be done per local standard of care.

Annually up to 10 years
Assessment of Patient Functional changes through a validated Patient Reported Outcomes (PROs) tool
Zeitfenster: Annually up to 10 years

For each subject, patient function will be assessed using the appropriate Patient-Reported Outcomes Measurement Information System (PROMIS) questionnaires. These may include: PROMIS Cognitive Function, PROMIS Fatigue, PROMIS Pain Intensity, PROMIS Pain Interference and PROMIS Physical Function. Each questionnaire is scored on a 5-point Likert scale ranging from 1 (never) to 5 (always). High scores indicate more of the domain being measured (eg, more fatigue, more physical function). Raw scores are converted to T-Scores based on a mean of 50 and a standard deviation of 10, allowing comparison of the sample to the general population.

Parent Proxy questionnaires will be used for children aged 5 to <18 years

Annually up to 10 years
Assessment of Health-Related Quality-of-Life (HRQoL) changes through validated Patient Reported Outcomes (PROs) tools
Zeitfenster: Annually up to 10 years

For each subject, HRQoL will be assessed using the following scales:

age 5 to <18 years: Pediatric QoL scales (Short Form [SF]-10, Caregiver Global Impression of Status/Severity [CaGI-S]);

age ≥18 years: Adult QoL scales (Short Form [SF]-36, Patient Global Impression of Status/Severity [PGI-S])

The SF-10 is a 10-item caregiver-completed questionnaire for assessment of physical and psychosocial HRQoL in children. Each question has 5 options ranging from "Excellent" to "Poor". Higher scores are associated with better HRQoL.

The SF-36 measures a broad spectrum of physical and mental health domains, including physical functioning, role limitations due to physical and emotional problems, bodily pain, general health perceptions, vitality, social functioning, and emotional well-being. The SF-36 generates scores ranging from 0-100 with higher scores associated with better HRQoL.

The CaGI-S and PGI-S will be scored across a 7-point scale with lower scores associated with better HRQoL.

Annually up to 10 years
Measurement of inorganic phosphate (PPi) levels in patients' venous blood
Zeitfenster: Annually up to 10 years

For each subject, QoL will be assessed using the following scales: global clinical impression of severity (GCI-S) and, short form 10 health survey for children and short form 36 health survey for adults short form 10 health survey for children and short form 36 health survey for adults

Annually up to 10 years

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Mitarbeiter

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

25. Juli 2024

Primärer Abschluss (Tatsächlich)

28. August 2026

Studienabschluss (Tatsächlich)

28. August 2026

Studienanmeldedaten

Zuerst eingereicht

16. Februar 2024

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

4. März 2024

Zuerst gepostet (Tatsächlich)

8. März 2024

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

1. Oktober 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

28. September 2026

Zuletzt verifiziert

1. September 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • INZ701-007

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

UNENTSCHIEDEN

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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