HealthydietUATNCT00474396
Dietary Interventions Evaluating Transport of Uric Acid Across the Tubules
A study testing Low fat dairy diet in people with Healthy, run by Icahn School of Medicine at Mount Sinai.
Trial summary
The purpose of the study is to determine whether low fat dairy diet reduces serum uric acid levels. Read more about this study
- Who is it for?
- Ages 18 to 55 yearsHealthy volunteers can take part
- Conditions the study is for
- Healthy
- What is being tested?
- Low fat dairy diet
- Type of treatment
- Lifestyle or therapy programme
- How many people
- 59 participants
- Where
- No sites listed yet
- Study dates
- Apr 2005to Oct 2006
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 55 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- • 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
Show all 13Show fewer
- 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)
Who cannot join
- • 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
Show all 9Show fewer
- 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
About this study
The purpose of the study is to determine whether low fat dairy diet reduces serum uric acid levels.
Read the 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.
- Conditions
- Healthy
- Being tested
- Low fat dairy diet
- Keywords
- Uric acid, Dairy, Diet
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Low fat dairy dietBehavioural
What is being measured
The primary outcome is the main question the study is designed to answer.
Lowering of serum uric acid levels
Secondary outcomes (1)
Lowering of the fractional excretion of uric acid and blood pressure
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 May 2007 (estimated)
- Study startApr 2005
- Study completionOct 2006
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for HealthyStudies of the same condition, open and under way.
- More trials run by Icahn School of Medicine at Mount SinaiThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Enrolment
- 59 participants (actual)
Sponsor and investigators
- Lead sponsor
- Icahn School of Medicine at Mount Sinai
- Sponsor type
- University, hospital or other
- Investigators
- Mohammed A Rafey, MD, Principal investigator, Icahn School of Medicine at Mount Sinai
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00474396
- Sponsor's protocol ID
- 04-1094
- Acronym
- dietUAT
- Status last verified
- May 2007
- First submitted
- 14 May 2007
- Last updated
- 16 May 2007
- Results posted
- No
- Data monitoring committee
- Yes
Publications
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.
PubMed 12920398Choi 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.
PubMed 15014182Appel 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.
PubMed 9099655
Study at a glance
From the registry record, last updated by the sponsor on 16 May 2007. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Dietary Interventions Evaluating Transport of Uric Acid Across the Tubules
- ClinicalTrials.gov ID
- NCT00474396
- Acronym / sponsor ID
- dietUAT / 04-1094
- Conditions
- Healthy
- Keywords
- Uric acid, Dairy, Diet
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 59 participants (actual)
- Lead sponsor
- Icahn School of Medicine at Mount SinaiUniversity, hospital or other
- Study start
- Apr 2005
- Study completion
- Oct 2006 (actual)
- First posted
- 16 May 2007 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of the study is to determine whether low fat dairy diet reduces serum uric acid levels.
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 design
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
Who may qualify
- Ages
- 18 to 55 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (13 listed)
- • Healthy adult volunteers
Key exclusion criteria (9 listed)
- • Coronary artery disease
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Low fat dairy diet | Behavioural | – |
Primary outcome
Lowering of serum uric acid levels
1 secondary outcome
Lowering of the fractional excretion of uric acid and blood pressure
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 May 2007.
- Background: PubMed 12920398Rafey 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.
- Background: PubMed 15014182Choi 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.
- Background: PubMed 9099655Appel 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.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Mohammed A Rafey, MD principal investigator
Icahn School of Medicine at Mount Sinai
Questions about this trial
What is this clinical trial studying?
A study testing Low fat dairy diet in people with Healthy, run by Icahn School of Medicine at Mount Sinai.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 13 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 16 May 2007. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Lowering of serum uric acid levels. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00474396, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 May 2007.