Dietary Interventions Evaluating Transport of Uric Acid Across the Tubules (dietUAT)
2007年5月15日 更新者:Icahn School of Medicine at Mount Sinai
The purpose of the study is to determine whether low fat dairy diet reduces serum uric acid levels.
研究概览
详细说明
Uric acid plays a role not only in the pathogenesis of gout but is also a predictor of cardiovascular disease, hypertension and renal disease in man.
We have identified the human urate ion channel transporter (hUAT), located in the proximal convoluted tubule of the kidney that is involved in both the secretion and reabsorption of urate across the tubule.
This channel has a unique lectin binding site that in in-vitro studies, has been found to be modulated by glucose, galactose and lactose.
We have also identified a mutation (G/A polymorphism) in our laboratory, that in in-vitro studies has demonstrated diminished hUAT channel activity.
Cross-sectional studies have earlier shown that uric acid levels vary with serum glucose levels.
Studies have also reported that a low-fat dairy diet reduces the incidence of gout, while others have shown that this diet reduces blood pressure significantly when compared with a non-dairy diet.
We hypothesize that the effect of blood glucose levels in lowering uric acid levels is through the regulation of hUAT channel activity.
We also hypothesize that a low-fat dairy diet reduces serum uric acid levels through hUAT regulation leading to a decrease in the incidence of gout and a reduction in blood pressure levels.
In our proposed randomized, controlled, cross-over trial in healthy adult volunteers, we aim to study the effect of a low-fat dairy diet and a non-dairy diet on serum uric acid levels, the renal fractional excretion of uric acid and blood pressure.
We will also study the effect of an acute intravenous infusion of glucose on these parameters.
DNA analysis for hUAT mutations of study subjects will be done to assess if there is a blunted response of hUAT activity in subjects with the polymorphism as compared to normal individuals.
研究类型
介入性
注册 (实际的)
59
阶段
- 不适用
参与标准
研究人员寻找符合特定描述的人,称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
18年 至 55年 (成人)
接受健康志愿者
是的
有资格学习的性别
全部
描述
Inclusion Criteria:
• Healthy adult volunteers
- Coronary artery disease
- Glucose intolerance or Diabetes(a fasting blood sugar of less than 100 mg/dl as per the American Diabetes Association guidelines)
- CHF
- Gout
- Lactose intolerance
- Milk allergy
- Women who are pregnant or lactating
- Subjects who are on any medications except birth control pills
- Subjects who drink more than 3 servings of beer or liquor per week.
- Normal blood pressure ( less than 120 mmHg systolic and 80 mmHg diastolic)
- Normal serum UA levels
- Normal renal funcion (calculated GFR >90ml/min)
Exclusion Criteria:
• Coronary artery disease
- Glucose intolerance or Diabetes(a fasting blood sugar of less than 100 mg/dl as per the American Diabetes Association guidelines)
- CHF
- Gout
- Lactose intolerance
- Milk allergy
- Women who are pregnant or lactating
- Subjects who are on any medications except birth control pills
- Subjects who drink more than 3 servings of beer or liquor per week
学习计划
本节提供研究计划的详细信息,包括研究的设计方式和研究的衡量标准。
研究是如何设计的?
设计细节
- 主要用途:基础科学
- 分配:随机化
- 介入模型:并行分配
- 屏蔽:双倍的
研究衡量的是什么?
主要结果指标
结果测量 |
---|
Lowering of serum uric acid levels
|
次要结果测量
结果测量 |
---|
Lowering of the fractional excretion of uric acid and blood pressure
|
合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
调查人员
- 首席研究员:Mohammed A Rafey, MD、Icahn School of Medicine at Mount Sinai
出版物和有用的链接
负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。
一般刊物
- Appel LJ, Moore TJ, Obarzanek E, Vollmer WM, Svetkey LP, Sacks FM, Bray GA, Vogt TM, Cutler JA, Windhauser MM, Lin PH, Karanja N. A clinical trial of the effects of dietary patterns on blood pressure. DASH Collaborative Research Group. N Engl J Med. 1997 Apr 17;336(16):1117-24. doi: 10.1056/NEJM199704173361601.
- Rafey MA, Lipkowitz MS, Leal-Pinto E, Abramson RG. Uric acid transport. Curr Opin Nephrol Hypertens. 2003 Sep;12(5):511-6. doi: 10.1097/00041552-200309000-00005.
- Choi HK, Atkinson K, Karlson EW, Willett W, Curhan G. Purine-rich foods, dairy and protein intake, and the risk of gout in men. N Engl J Med. 2004 Mar 11;350(11):1093-103. doi: 10.1056/NEJMoa035700.
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查,以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始
2005年4月1日
研究完成 (实际的)
2006年10月1日
研究注册日期
首次提交
2007年5月14日
首先提交符合 QC 标准的
2007年5月15日
首次发布 (估计)
2007年5月16日
研究记录更新
最后更新发布 (估计)
2007年5月16日
上次提交的符合 QC 标准的更新
2007年5月15日
最后验证
2007年5月1日
更多信息
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