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NCT Number: NCT06399952

Baker Gordon Syndrome Natural History Study

The goal of this study is to conduct a prospective, longitudinal assessment of the natural clinical progression of children and adults with Synaptotagmin1-Associated Neurodevelopmental Disorder also known as Baker Gordon Syndrome (BAGOS). This will be performed by acquiring baseline measurements and developing effective outcome measures and diagnostic tools for the disorder, to prepare the healthcare system for future clinical trials.

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Key information

About this study

The current natural history study is being conducted in anticipation of future treatments for patients with confirmed BAGOS. The study is an important avenue of investigation that will increase the understanding of the disorder and lead to important diagnostic and therapeutic advances. Its purpose is to identify demographic, genetic, environmental, and treatment modalities and concomitant medications that correlate with the disease's development and outcomes. This study will use standard scales and questionnaires for the assessment of global development, language, memory, and motor function, and by collecting sleep and seizure diaries. A small blood sample will be collected for whole genome sequencing and proteomic analysis. Brain imaging (MRI) and electroencephalography (EEG) recordings will be collected to identify disease biomarkers. The investigators will also be asking participants to provide a small skin sample for the development of patient specific stem cells which will be used to further understand the impact of Synaptotagmin1 mutations on neurodevelopment and as a potential screen for future therapies.

Who can participate

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Genetically confirmed diagnosis of Baker Gordon syndrome.
  • 0-99 years
  • Ability to send medical records and diagnostic test results.
  • Ability to complete tests and questionnaires.

Exclusion criteria

  • The presence of another condition or co-morbidity unrelated to Baker Gordon syndrome, that affects neurodevelopment.

In this study, the primary caregivers/LAR for each participant diagnosed Baker Gordon Syndrome will be also considered participants.

Caregivers/LAR will have to meet the following inclusion criteria:

  • >18 years.
  • Legal caregiver of the patient diagnosed with a Baker Gordon Syndrome.
  • Willingness to follow study procedures, as assessed by the research team.
  • Willingness to sign the consent form.
  • Ability to understand all the information regarding the study, as assessed by the research team.

Caregivers/LAR Exclusion Criteria:

  • Less than 18 years old.

Treatment and study plan

Brain Magnetic Resonance Imaging (MRI)

Diagnostic Test

Participants will undergo a 5-10 minute non-anesthesia brain MRI in order to evaluate for changes in brain structure. A 20 to 30 minutes 20 channel surface electroencephalography will be performed in the wake and sleep states.

Other names: Electroencephalography (EEG)

Whole Genome Sequencing

Genetic

15 milliliters of blood will be collected at the initial visit. Blood samples will be centrifuged, and plasma stored in the University of Missouri Next Gen Precision Health building. Next generation whole genome sequencing and proteomics will be performed on plasma samples. Additional blood will be collected for the DNA biobank.

Other names: Next Generation Sequencing

Induced Pluripotential Stem Cells

Other

A 3 mm skin punch biopsy will be collected for developing induced pluripotential stem cells.

Other names: iPSP

Primary outcomes

  1. Collection of relevant medical data (retrospective and prospective)

    Time frame: 24 months

    Collection of demographic data, BAGOS-related medical history, past medical and surgical history, current medication, history of immunizations and family medical history.

  2. Neurological Assessment Scale

    Time frame: 24 months

    Hammersmith Infant Neurological Examination (HINE) (0-2 years ONLY). Maximum global score of 78. Higher scores indicate a higher degree of neurological performance.

  3. Clinical Global Impressions Scale - Practitioner

    Time frame: 24 months

    Scales whereby practitioner rates from 1 to 7 the overall improvement/deterioration of the participant affected by BAGOS. One is improved and 7 denotes deterioration.

  4. Pediatric Evaluation of Disability Inventory

    Time frame: 24 months

    Pediatric Evaluation of Disability Inventory assesses key functional capabilities and performance in children ages 6 months to 7 years.

  5. Pediatric Evaluation of Disability Inventory Computer Adaptive Test (PEDI-CAT)

    Time frame: 24 months

    The PEDI-CAT is a computer adaptive caregiver report which measures Daily Activities, Mobility, Social/Cognitive, and Responsibility. It's designed for use with children and youth with a variety of physical and/or behavioral conditions.

Secondary outcomes

  1. Gross motor milestones

    Time frame: 24 months

    World Health Organization (WHO) Motor Milestones. Scale of 6 gross motor milestones. Lower scores denote worse motor function.

  2. Global development assessment scale

    Time frame: 24 months

    Bayley Scales of Infant and Toddler Development - 4 (BSID-4) for Developmental delays. Scale is divided into five domains, which are further divided into subdomains. The first step is to calculate the starting point by beginning with the items that are age appropriate. The starting point is validated if three consecutive items are achieved. If the participant affected by Baker Gordon Syndrome does not achieve three consecutive items in a row at the age-appropriate starting point, the evaluator must go backwards to the lower age-starting point until the participant affected by Baker Gordon Syndrome achieves three items in a row. The assessment stops once five items in a row are not achieved.

  3. Vineland Adaptive Behavior Scales Third Edition

    Time frame: 24 months

    Vineland Adaptive Behavior Scales Third Edition is the leading instrument for supporting the diagnosis of intellectual and developmental disabilities. Vineland-3 not only aids in diagnosis, but provides valuable information for developing educational and treatment plans

  4. Aberrant behavior assessment (ABC)

    Time frame: 24 months

    Aberrant Behavior Checklist-Community (ABC-C). This scale comprises 58 items and is divided into five subdomains. The ABC-C is designed on a four-point scale with the lowest score representing less-affected patients while the highest score represents most-affected patients.

  5. Behavior Assessment System for Children (BASC), 3rd Edition

    Time frame: 24 months

    Behavior Assessment System for Children (BASC), 3rd Edition. A comprehensive set of rating scales and forms, BASC-3 helps participants understand the behaviors and emotions of children and adolescents

  6. Conners 4th Edition

    Time frame: 24 months

    Conners 4th Edition (Conners 4™) provides a comprehensive assessment of symptoms and impairments associated with ADHD and common co-occurring problems and disorders in children and youth aged 6 to 18 years.

  7. Motor function assessment

    Time frame: 24 months

    Functional Mobility Scale (FMS). Scale which rates the walking ability in three different walking distances, and these distances will be rated on a 6-point scale. Higher scored denote less impairment.

  8. Pediatric Sleep Questionnaire (PSQ)

    Time frame: 24 months

    A 22-point questionnaire that assesses the sleep patterns and potential abnormalities in children and their affected quality of life.

  9. Test of Everyday Attention for Children 2nd Edition (TEA-Ch2)

    Time frame: 24 months

    Test of Everyday Attention for Children Second Edition (TEA-Ch2) uniquely measures separable aspects of attention.

  10. NEPSY 2nd edition

    Time frame: 24 months

    NEPSY®-II results provide information relating to typical childhood disorders, enabling accurate diagnosis and intervention planning for success in school and at home.

  11. The Infant/Toddler Sensory Profile

    Time frame: 24 months

    The Infant/Toddler Sensory Profile® was developed to evaluate sensory processing patterns in the very young. The results provide understanding of how sensory processing affects the child's daily functioning performance.

  12. Mullen Scales of Early Learning

    Time frame: 24 months

    Mullen Scales of Early Learning is a developmentally integrated system that assesses language, motor, and perceptual abilities, measures cognitive ability and motor development quickly and reliability.

Other outcomes

  1. Health economics

    Time frame: 24 months

    Interview with Caregivers

  2. Clinical trial readiness

    Time frame: 24 months

    Demographic data collection

  3. Clinical trial readiness

    Time frame: 24 months

    Facilities Preparation

  4. Laboratory tests

    Time frame: 24 months

    Genomic and proteomic analysis of plasma samples to determine biomarkers of disease progression

  5. Electroencephalogram activity recordings (EEG)

    Time frame: 24 months

    Electroencephalogram (EEG) to record brain activity of Baker Gordon Syndrome patients over a 2-hour period.

  6. Brain magnetic resonance imaging (MRI)

    Time frame: 24 months

    Brain magnetic imaging (MRI) to measure the brain grey and white matter volume.

Study contacts

Contact information is provided by the study sponsor or research team.

W. David R Arnold, MD

CONTACT

[email protected]

573-884-2924

Sponsors and collaborators

Lead sponsor

University of Missouri-Columbia

Other

Registry information

Official study title

A Prospective, Longitudinal and Observational Natural History Study for Children and Adults With Baker Gordon Syndrome - Genetic Autism Alliance

Acronym: BAGOS

Important dates

Study start
2024
Primary completion
2027
Study completion
2027
First posted
May 6, 2024
Registry last updated
Jun 3, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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