NCT06115109

Brief Summary

The goal of this study is to conduct a prospective, longitudinal study to observe the natural clinical progression and disease outcome of AS patients receiving no disease-modified intervention, with the purpose of obtaining data that will be useful for future clinical trials.

Trial Health

57
Monitor

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Trial has exceeded expected completion date
Enrollment
40

participants targeted

Target at P25-P50 for all trials

Timeline
Completed

Started Dec 2023

Geographic Reach
1 country

2 active sites

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

July 26, 2022

Completed
1.3 years until next milestone

First Posted

Study publicly available on registry

November 2, 2023

Completed
29 days until next milestone

Study Start

First participant enrolled

December 1, 2023

Completed
1.1 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

December 31, 2024

Completed
6 months until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2025

Completed
Last Updated

April 3, 2024

Status Verified

April 1, 2024

Enrollment Period

1.1 years

First QC Date

July 26, 2022

Last Update Submit

April 1, 2024

Conditions

Outcome Measures

Primary Outcomes (2)

  • Clinical Global Impression Scale for AS (CGI-AS)

    Medical and neurological evaluation: -Clinical Global Impression Scale for AS (CGI-AS). The scale consists of several categories, from "not assessed" to "extremely severe." Professionals assess various aspects of behavior, communication, and the individual's overall functioning to assign a score on the CGI-AS scale. A higher score indicates a greater severity of symptoms, while a lower score indicates less severity.

    2 years

  • Hammersmith Neonatal Neurological Examination (HINE) (for 0-2 years)

    Medical and neurological evaluation: Hammersmith Neonatal Neurological Examination (HINE). 26 items that assess neurological function (cranial nerve function, posture, movements, tone, reflexes, and reactions). For neurological function, each item is individually scored on a scale of 0 to 3 based on descriptions and illustrative diagrams, so the total score can range from a minimum of 0 to a maximum of 78.

    2 years

Secondary Outcomes (12)

  • Movement through actimetry

    2 years

  • Motor function scales

    2 years

  • Global development: Bayley Scale-3 (BSID-3)

    2 years

  • Global development: Vineland Scale-III (VABS-III)

    2 years

  • Global development: Aberrant behavior scale (ABC-C)

    2 years

  • +7 more secondary outcomes

Interventions

Non intervention, Observational study

Eligibility Criteria

Age3 Months - 99 Years
Sexall
Healthy VolunteersNo
Age GroupsChild (0-17), Adult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

All individuals with a molecular diagnosis of Angelman syndrome

You may qualify if:

  • Male or female between 3 months and 99 years of age.
  • Clinical diagnosis of Angelman Syndrome and molecular confirmation of the diagnosis.
  • The participant has an acceptable guardian capable of giving consent on behalf of the participant,
  • Willingness and ability of their guardians to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures.

You may not qualify if:

  • Patients with any comorbidity that, in the clinical judgment of the principal investigator, may affect the results of the study. Any confirmed chronic or acute condition or illness affecting any system(s) that could interfere with study results and/or compliance with study procedures is included.
  • Patients who are participating in parallel studies with investigational drugs.
  • Unwillingness or inability of their guardians to follow the procedures outlined in the protocol.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (2)

Hospital Parc Tauli. Servicio de Genética molecular

Barcelona, 08208, Spain

RECRUITING

Servicio de Farmacología Clínica. Hospital Universitario Puerta de Hierro Majadahonda

Madrid, 28049, Spain

RECRUITING

MeSH Terms

Conditions

Angelman Syndrome

Interventions

Observation

Condition Hierarchy (Ancestors)

Movement DisordersCentral Nervous System DiseasesNervous System DiseasesAbnormalities, MultipleCongenital AbnormalitiesCongenital, Hereditary, and Neonatal Diseases and AbnormalitiesChromosome DisordersGenetic Diseases, InbornImprinting Disorders

Intervention Hierarchy (Ancestors)

MethodsInvestigative Techniques

Study Officials

  • BELEN RUIZ ANTORAN, MD, Ph

    Clinical Pharmacology Deparment, Hospital Universitario Puerta de Hierro Majadahonda

    PRINCIPAL INVESTIGATOR

Central Study Contacts

BELEN RUIZ ANTORAN, MD, Ph

CONTACT

Study Design

Study Type
observational
Observational Model
COHORT
Time Perspective
PROSPECTIVE
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Principal Investigator

Study Record Dates

First Submitted

July 26, 2022

First Posted

November 2, 2023

Study Start

December 1, 2023

Primary Completion

December 31, 2024

Study Completion

July 1, 2025

Last Updated

April 3, 2024

Record last verified: 2024-04

Locations