Dietary Interventions Evaluating Transport of Uric Acid Across the Tubules (dietUAT)

May 15, 2007 updated by: 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.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

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.

Study Type

Interventional

Enrollment (Actual)

59

Phase

  • Not Applicable

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

18 years to 55 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

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

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

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Lowering of serum uric acid levels

Secondary Outcome Measures

Outcome Measure
Lowering of the fractional excretion of uric acid and blood pressure

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Icahn School of Medicine at Mount Sinai

Investigators

  • Principal Investigator: Mohammed A Rafey, MD, ICAHN School of Medicine at Mount Sinai

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.

General Publications

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

April 1, 2005

Study Completion (Actual)

October 1, 2006

Study Registration Dates

First Submitted

May 14, 2007

First Submitted That Met QC Criteria

May 15, 2007

First Posted (Estimate)

May 16, 2007

Study Record Updates

Last Update Posted (Estimate)

May 16, 2007

Last Update Submitted That Met QC Criteria

May 15, 2007

Last Verified

May 1, 2007

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 04-1094

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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