- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01395394
Phenylketonuria, Oxidative Stress, and BH4
August 27, 2014 updated by: Rani Singh, Emory University
The Ability of Kuvan® (Sapropterin Dihydrochloride) to Prevent Meal-induced Lipid Peroxidation and Endothelial Dysfunction in Patients With Phenylketonuria: a Pilot Study
The purpose of this study is to see how tetrahydrobiopterin therapy (BH4; also known as sapropterin dihydrochloride or Kuvan) affects measures of oxidative stress and endothelial function in patients with Phenylketonuria (PKU).
Study Overview
Status
Terminated
Conditions
Intervention / Treatment
Detailed Description
Oxidative stress will be induced by having participants eat a meal in polyunsaturated fats. The investigators will see how participants respond to the meal challenge over the course of 6 hours.
- PKU participants who are currently on BH4 therapy will be evaluated while taking BH4 with the meal at a single study visit.
- PKU participants who did not responded to BH4 therapy will be evaluated twice. At the first study visit the investigators will see how you react to the meal challenge when you are not given BH4. You will be given BH4 for two weeks, then return for a second meal challenge study visit while taking BH4.
- Healthy controls will be evaluated after consuming the meal only (no BH4) at a single study visit.
Study Type
Interventional
Enrollment (Actual)
12
Phase
- Phase 2
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Georgia
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Decatur, Georgia, United States, 30033
- Emory University
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
10 years to 45 years (ADULT, CHILD)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Have read, understood, and signed this consent form (and assent form, if <18 years old)
- Are between the ages of 10-45 years
- Weigh at least 75 pounds (34 kg)
- Meet group-specific criteria
Exclusion Criteria:
- Smoke
- Have any history of cardiovascular disease
- Have hepatic impairment, or demonstrate abnormal baseline liver function lab test results
- Have donated blood within 3 months prior to the study or are anemic as shown by the baseline lab results
- Are unwilling to discontinue dietary supplements (excluding medical food) two weeks prior to their first study visit
- Are currently take medications that will interfere with the interpretation of selected endpoints (such as lipid-lowering medication)
- Are currently pregnant or breastfeeding
- Excluding PKU, have a chronic illness, disorder, or condition (including but not limited to diabetes, hypertension, cancer)
- Have taken any investigational drug (including Kuvan for Kuvan-unresponsive participants & controls) within 3 months prior to the study
- In the opinion of the Investigator, should not be included in the study for any reason, including inability to follow study procedures
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Allocation: NON_RANDOMIZED
- Interventional Model: PARALLEL
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: BH4 Non-Responders
Participants in this group have PKU and were deemed unresponsive to the drug.
They will attend their first study visit, and proceed through the meal challenge without BH4.
They will then take BH4 for 2 weeks.
The second meal challenge will be performed with the participant's final dose of BH4.
|
Participants in the BH4 Non-Responder group will be given a 20 mg/kg body weight/day dose of Kuvan to take on a daily basis for two weeks.
The last dose will be administered at the participant's study visit 2.
Other Names:
At each study visit, patients will receive a meal high in polyunsaturated fats that will promote a transitory increase in oxidative stress measures and endothelial dysfunction
|
EXPERIMENTAL: Healthy Controls
Participants in this group match an enrolled PKU participant in terms of age, gender, and body mass index class.
They will participate in a single study visit and will not be given BH4.
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At each study visit, patients will receive a meal high in polyunsaturated fats that will promote a transitory increase in oxidative stress measures and endothelial dysfunction
|
EXPERIMENTAL: BH4 Responders
Participants in this group will use their already prescribed BH4 with the meal challenge and be assessed at a single study visit.
They will take their prescribed BH4 with the meal.
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At each study visit, patients will receive a meal high in polyunsaturated fats that will promote a transitory increase in oxidative stress measures and endothelial dysfunction
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Lipid Peroxidation
Time Frame: Lipid peroxidation will be measured every other hour for six hours at baseline (study visit 1) for all study groups
|
Markers will be assessed every other hour for each 6-hour study visit.
Kuvan responders and healthy controls will only be assessed at one 6-hour study visit.
Kuvan non-responders will be assessed at two study visits (a baseline visit, and a visit after two weeks of Kuvan therapy).
Values will be assessed groupwise and also assessed for intrapersonal change in the Kuvan non-responsive group.
Time frame of participation is estimated at one month.
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Lipid peroxidation will be measured every other hour for six hours at baseline (study visit 1) for all study groups
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C-Reactive Protein (CRP)
Time Frame: CRP will be measured every other hour for six hours at baseline (study visit 1) for all study groups and again during a second visit 2 weeks after baseline in BH4 Non-Responders only (study visit 2)
|
Markers will be assessed every other hour for each 6-hour study visit.
Kuvan responders and healthy controls will only be assessed at one 6-hour study visit.
Kuvan non-responders will be assessed at two study visits (a baseline visit, and a visit after two weeks of Kuvan therapy).
Values will be assessed groupwise and also assessed for intrapersonal change in the Kuvan non-responsive group.
Time frame of participation is estimated at one month.
|
CRP will be measured every other hour for six hours at baseline (study visit 1) for all study groups and again during a second visit 2 weeks after baseline in BH4 Non-Responders only (study visit 2)
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Rani H Singh, PhD, Emory University
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Helpful Links
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
June 1, 2011
Primary Completion (ACTUAL)
June 1, 2013
Study Completion (ACTUAL)
June 1, 2013
Study Registration Dates
First Submitted
June 23, 2011
First Submitted That Met QC Criteria
July 14, 2011
First Posted (ESTIMATE)
July 15, 2011
Study Record Updates
Last Update Posted (ESTIMATE)
August 28, 2014
Last Update Submitted That Met QC Criteria
August 27, 2014
Last Verified
August 1, 2014
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- IRB00046153
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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