- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02009904
Simple Breath Test to Examine Phenylalanine Metabolism
Use of a Simple Breath Test to Examine Phenylalanine Metabolism in Children With Phenylketonuria (PKU)
Phenylketonuria(PKU)is a rare condition caused by the body's inability to properly breakdown an amino acid called phenylalanine(PHE), due to a missing enzyme, phenylalanine hydroxylase(PAH). When the enzyme is missing and/or not functioning properly, it increases the level of PHE in the body. High levels of PHE can cause severe brain damage or nerve damage unless the children are on a strict low PHE diet. A low PHE diet restricts the intake of protein rich foods and can pose a significant burden to both the patient and the family.
Investigators at the University of British Columbia and British Columbia Children's Hospital will examine the phenylalanine metabolism in children with PKU using a simple breath test.
Patients (5-18y) receiving standard clinical care at the BC Children's Hospital's Biochemical Diseases Clinic will be enrolled.The study will be conducted twice on each patient. Baseline measurements will be performed at the beginning of each study for each patient.The Physician in charge will then prescribe the standard dose of sapropterin dihydrochloride (Kuvan®) (20mg/kg/d) or otherwise as deemed appropriate by the physician-in-charge. The test will be repeated a week (minimum) after the beginning of treatment with the prescribed dose.
The investigators propose that children who are responsive to sapropterin dihydrochloride (Kuvan®) will have increased 13CO2 in breath after treatment, and those who do not respond will have no change in the 13CO2 in the breath before and after treatment.
As a comparison to the experimental group, age and gender matched healthy controls will also be studied. The test in healthy controls will be performed once without any intervention, and is only used as a comparative value.
Study Overview
Status
Conditions
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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British Columbia
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Vancouver, British Columbia, Canada, V5Z 4H4
- Child & Family Research Institute
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Children with PKU will be enrolled from the Biochemical Diseases clinic at the British Columbia Children's Hospital.
Healthy controls will be enrolled from the community and will undergo screening for age and gender match.
Description
Inclusion Criteria:
Study Subjects:
- Children (4-18y)diagnosed with PKU
- Parent(s) or guardian(s) willing and able to provide informed signed consent.
- Parent(s) or guardian(s) willing and able to comply with all study procedures
Healthy controls:
- Healthy Children (4-18y) with no health condition
- Willing to go through an initial screening for age and gender match
- Parents or guardians willing and able to provide informed signed consent.
- Parents or guardians willing and able to comply with study procedures
Exclusion Criteria:
Study Subjects:
- Children < 4y of age diagnosed with PKU, as it may be challenging to collect breath samples and perform indirect calorimeter in very young children
- Children (4-18y)who are diagnosed with PKU, but are currently ill, with a fever, cold, vomiting or diarrhea
Healthy controls:
- Healthy Children < 4y of age , as it may be challenging to collect breath samples and perform indirect calorimeter in very young children.
- Healthy Children (4-18y), but are currently ill, with a fever, cold, vomiting or diarrhea.
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Control
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
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Phenylketonuria (PKU); Healthy Controls
Children with PKU (5-18y); Age and Gender matched healthy subjects for comparison
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
13C (carbon dioxide) production
Time Frame: 2 hours (1 study day)
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Breath samples are collected to measure 13C (carbon dioxide) production.
Rate of carbon dioxide produced is measured at 60 minutes after the start of the study using an indirect calorimeter.
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2 hours (1 study day)
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Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Rajavel Elango, Ph.D, University of British Columbia
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- H12-01421
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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