Natural History Observational Study of MPS IIIa in SMC

• Conditions: Sanfilippo Syndrome A

• Registration Number: NCT04918641
• Lead Sponsor: Samsung Medical Center

Brief Summary

To characterize the clinical course of mucopolysaccharidosis type IIIA (MPS IIIA), and identify potential endpoints for future treatment trials.

Detailed Description

Not available

Study Timeline

• Status Verified: 2021-04
• Study First Submitted: 2021-04-28
• Study First Submitted QC: 2021-06-06
• Last Update Submitted: 2021-06-06
• Study First Posted: 2021-06-09
• Last Update Posted: 2021-06-09
• Study Start: 2021-06-30
• Primary Completion: 2023-07-28
• Study Completion: 2024-07-28

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 25

Inclusion Criteria

• Confirmed diagnosis of MPS IIIA
• Has the ability to comply with protocol requirements, in the opinion of the investigator

Exclusion Criteria

• Patient's assent is unattainable, or the patient's parent(s), or patient's legally authorized representative(s) is/are unable to understand the nature, scope, and possible consequences of the study, or do/does not agree to comply with the protocol defined schedule of assessments.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Change From Baseline in Bayley Scales of Infant Development-III/Kaufman Assessment Battery for Children-II (BSID-III/KABC-II) Age-Equivalent Scores	Baseline, 12 months, and 24 months	The Bayley Scales of Infant and Toddler Development-Third Edition (BSID-III) is an individually administered test designed to assess the developmental functioning of infants and toddlers. The Bayley-III assesses development in five areas: cognitive, language, motor, social-emotional, and adaptive behavior. Children under the age of 3 will be tested for this. The Kaufman Assessment Battery for Children-Second Edition (KABC-II) is a clinical instrument for assessing cognitive development. Children over the age of 3 will be tested for this. Raw scores will be converted to age- equivalent scores to measure ability, skill, and knowledge, expressed as the age at which most individuals reach the same level (age norm; range: 0, unbound ). A positive value indicates improvement. The BSID-III and KABC-II age- equivalent scores will be based on the cognitive domain and average non-verbal age-equivalent score, respectively.
Change from Baseline in MPS health Assessment Questionnaire, Sanfilippo Behavior Rating Scale	Baseline, 12 months, and 24 months	Change from baseline in the SBRS scale assessed by parent report using the Sanfilippo Behavior Rating Scale form.
Change From Baseline in Vineland Adaptive Behavior Scales-II (VABS-II) Age-equivalent Scores	Baseline, 12 months, and 24 months	The age equivalent score represents the age in months of the typical and normal individual who would achieve the same result as the one who was tested.; The age equivalent scores are assessed by Vineland Adaptive Behavior Scales, Expanded Interview Form, Second edition (VABS-II). The Vineland is designed to measure the adaptive behavior of individuals from birth to age 90.; The Vineland-II contains 5 domains each with 2-3 subdomains. The main domains are Communication, Daily Living Skills, Socialization, Motor Skills, and Maladaptive Behavior. A positive value indicates improvement in health and cognition.

Secondary Outcome Measures

Name	Time	Method
Imaging characteristics	Baseline, 12 months	MRI will be used to assess changes in the size of various organs affected by the disease, including the brain, liver, and spleen.
Hearing assessments	Baseline, 12 months, and 24 months	The function of hearing will be assessed using Auditory Brainstem Response (ABR).
Echocardiography	Baseline, 6 months, 12 months, and 24 months	2-D Echocardiography will be used to assess heart valve abnormalities and ventricular hypertrophy.
Sleep habits	Baseline, 12 months, and 24 months	Patient sleep habits will be assessed using Children's Sleep Habits Questionnaire (CSHQ).
Ophthalmology assessments	Baseline, 12 months, and 24 months	Change from Baseline in lens opacification
Change From Baseline in Quality of Life (ITQoL/PedsQL) Questionnaire	Baseline, 12 months, and 24 months	Infant Toddler Quality of Life (ITQoL): The ITQoL Questionnaire is a generic, validated health status measure for children including items and scales to measure aspects of physical functioning, development, pain, mood, behavior, general health, and impact on parents. A positive value indicates improvement.; Pediatric Quality of Life Inventory (PedsQL): Pediatric Quality of Life Inventory (PedsQL) is a modular approach to measuring health-related quality of life (HRQOL) in healthy children and adolescents and those with acute and chronic health conditions. Lower scores indicate better functioning.