The Ability of Kuvan® (Sapropterin Dihydrochloride) to Prevent Meal-induced Lipid Peroxidation and Endothelial Dysfunction in Patients With Phenylketonuria: a Pilot Study
试验速览
- 阶段
- 2 期
- 状态
- 终止
- 入组人数
- 12
- 试验地点
- 1
- 主要终点
- C-Reactive Protein (CRP)
研究概览
简要总结
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).
详细描述
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.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 盲法
- None
入排标准
- 年龄范围
- 10 Years 至 45 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •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
排除标准
- •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
研究组 & 干预措施
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.
干预措施: Kuvan (Drug)
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.
干预措施: Meal Challenge (Other)
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.
干预措施: Meal Challenge (Other)
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.
干预措施: Meal Challenge (Other)
结局指标
主要结局
C-Reactive Protein (CRP)
时间窗: 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.
Lipid Peroxidation
时间窗: 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.
次要结局
未报告次要终点