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Functional Evaluation in Patients With Urea Cycle Disorders (UCD) During a Driving Task

29. juli 2026 oppdatert av: St. Jude Children's Research Hospital

Cognitive and Motor Function Examination in Patients With Urea Cycle Disorders (UCD) During a Driving Task Using Functional Near Infrared Spectroscopy (fNIRS)

This study is being done to understand how the brain works while people with urea cycle disorder (UCD) perform driving tasks that range from easy to difficult and to look at how that compares to traditional tests of thinking and attention.

Studieoversikt

Status

Rekruttering

Forhold

Urea syklus lidelse

Detaljert beskrivelse

Primary Objective

To use fNIRS to study brain functional behavior in subjects with UCD by measuring the changes in HbO, HbR and HbT concentrations versus healthy control volunteers during the baseline driving task on the left and right prefrontal cortex (LPFC, RPFC).

Secondary Objective

To include other cortical regions such as temporal and occipital regions, to investigate the neurocognitive changes in these regions which may or may not change with driving. Thus, we will measure changes in HbO, HbR and HbT concentrations during the baseline driving task in four more brain regions (left and right parietal and occipital regions, LPA, RPA, LOL, ROL).

This is a non-therapeutic, non-interventional study in which brain fNIRS (functional near-infrared spectroscopy) measures will be compared under simulated driving conditions between patients with UCD vs. age and sex-matched control participants.

Participants who agree to participate will have Information about their medical history collected, have a basic neurological exam and answer questions about their health, diet, and driving habits. They will complete some simple thinking and memory tests. These tests will help investigators understand skills like memory, attention, and problem-solving. Participants will also wear a soft cap with small sensors called an fNIRS (functional near-infrared spectroscopy) device while they complete a driving simulator activity. This cap is noninvasive and measures how the brain uses oxygen while they drive in the simulator.

All study activities will be completed on the day of enrollment.

Studietype

Observasjonsmessig

Registrering (Antatt)

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Navn: Jean Laboe, RN
Telefonnummer: 901-595-1693
E-post: jean.laboe@stjude.org

Studiesteder

Forente stater
- Tennessee
  - Memphis, Tennessee, Forente stater, 38105
    - Rekruttering
    - St. Jude Children's Research Hospital
    - Ta kontakt med:
      
      Jean Laboe, RN
      
      Telefonnummer: 901-595-1693
      
      E-post: jean.laboe@stjude.org

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

Barn
Voksen

Tar imot friske frivillige

Prøvetakingsmetode

Ikke-sannsynlighetsprøve

Studiepopulasjon

Individuals who meet the Eligibility Criteria and agree to participate.

Beskrivelse

Inclusion Criteria:

Individuals 16 to 40 years with molecular or biochemical confirmation of a urea cycle disorder.
Healthy individuals will serve as an age and sex matched comparison group. Active driver's license for at least 6 months
Read and understand English. as the tasks have not been validated in other languages
IQ >=70.

Exclusion Criteria:

Skin disease that affects the scalp
Past or present vascular disease
Head trauma with loss of consciousness in the last year or evidence of cognitive impairment due to and persisting after head trauma
Motor movement disorder which may cause excessive movement or impede use of the steering wheel and/or pedal
Premature birth or birth before 32 weeks of gestation
The participant is taking a stimulant or antidepressant
Allergy to any component of the device, although expected to be rare
History of psychosis
Self-reported motion or cyber sickness
Self-reported illicit substance use
Vision disorder

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Antall grupper / kohorter

Kohorter og intervensjoner

Gruppe / Kohort
UCD group Participants with urea cycle disorders (UCD) who meet the Eligibility Criteria and consent to participate
Control group Healthy controls who meet the Eligibility Criteria and consent to participate

Hva måler studien?

Primære resultatmål

Resultatmål	Tiltaksbeskrivelse	Tidsramme
Changes in Oxyhemoglobin (HbO), Deoxyhemoglobin (HbR) and Total Hemoglobin (HbT) concentrations in the right and left prefrontal cortex in participants with urea cycle disorders (UCD) compared to healthy control volunteers Tidsramme: Day 1, during driving simulator task	Investigators will compare prefrontal cortex hemoglobin concentrations during low cognitive load between patients with UCD and healthy age and sex matched control participants using functional near-infrared spectroscopy (fNIRS). Mean values of hemoglobin concentration differences on the right and left prefrontal cortex between individuals, with and without UCD, during the low cognitive load task will be calculated and compared using two sample t-tests (for normally distributed data) or Wilcoxon rank sum tests (for nonnormally distributed data). P values will be adjusted for multiple comparisons using the Bonferroni method.	Day 1, during driving simulator task

Sekundære resultatmål

Resultatmål	Tiltaksbeskrivelse	Tidsramme
Changes in HbO, HbR and HbT concentrations in the left and right parietal and occipital brain regions in participants with urea cycle disorders (UCD) compared to healthy control volunteers Tidsramme: Day 1, during driving simulator task	Investigators will compare left and right parietal and occipital regions hemoglobin concentrations during low cognitive load between patients with UCD and healthy age and sex matched control participants using functional near-infrared spectroscopy (fNIRS). Mean values of hemoglobin concentration differences on the left and right parietal and occipital regions between individuals, with and without UCD, during the low cognitive load task will be calculated and compared using two sample t-tests (for normally distributed data) or Wilcoxon rank sum tests (for nonnormally distributed data). P values will be adjusted for multiple comparisons using the Bonferroni method.	Day 1, during driving simulator task

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

St. Jude Children's Research Hospital

Etterforskere

Hovedetterforsker: Andrea Gropman, M.D., St. Jude Children's Research Hospital

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Hjelpsomme linker

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

20. juli 2026

Primær fullføring (Antatt)

1. august 2031

Studiet fullført (Antatt)

1. august 2032

Datoer for studieregistrering

Først innsendt

8. juli 2026

Først innsendt som oppfylte QC-kriteriene