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Effects of Hyperuricemia Reversal on Features of the Metabolic Syndrome

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01654276
Recruitment Status : Completed
First Posted : July 31, 2012
Results First Posted : January 13, 2017
Last Update Posted : June 18, 2018
Information provided by (Responsible Party):
Naim Maalouf, University of Texas Southwestern Medical Center

Brief Summary:
This study is being done to evaluate whether the medication, febuxostat, can improve the degree of insulin resistance and other features of the metabolic syndrome (high blood pressure, elevated insulin levels, excess body fat around the waist, and/or high cholesterol) by lowering uric acid levels in the blood.

Condition or disease Intervention/treatment Phase
Gout Drug: Febuxostat Phase 4

Detailed Description:

The metabolic syndrome (MS) is characterized by a constellation of metabolic features including dyslipidemia, hyperglycemia, hypertension, obesity, and insulin resistance. This cluster of features is strongly associated with type 2 diabetes, atherosclerotic cardiovascular disease, and increased cardiovascular and all-cause mortality. Hyperuricemia (elevated serum uric acid) is associated with insulin resistance and features of the MS in cross-sectional epidemiological studies. However, it remains unclear whether this association is causal or simply coincidental. If hyperuricemia CAUSES insulin resistance, then lowering serum uric acid by pharmacological means may result in improved insulin sensitivity and reversal of features of the metabolic syndrome. In some recent small studies, lowering serum uric acid with allopurinol was associated with improvement in some of the features and/or complications of the MS: Allopurinol use resulted in reduction in blood pressure in adolescents and improvement in exercise capacity in patients with chronic stable angina. A low urine pH is strongly associated with insulin resistance, and individual features of the metabolic syndrome. Similarly, a low fractional excretion of uric acid is also associated with metabolic syndrome feature. We therefore would like to examine the effect on febuxostat on these two parameters which have been linked with the metabolic syndrome.

The goal of this study is to evaluate whether pharmacological lowering of serum uric acid with the medication febuxostat is associated with improvement in the degree of insulin resistance and various features of the metabolic syndrome.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 24 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Effects of Pharmacological Reversal of Hyperuricemia on Features of the Metabolic Syndrome
Study Start Date : May 2012
Actual Primary Completion Date : March 2015
Actual Study Completion Date : March 2015

Resource links provided by the National Library of Medicine

MedlinePlus Genetics related topics: Gout
Drug Information available for: Febuxostat

Arm Intervention/treatment
Experimental: Febuxostat
Adult patients (age > 21 years) with gout and hyperuricemia (serum uric acid > 7.0 mg/dl in men and >6.0 mg/dl in women) requiring uric acid lowering therapy.
Drug: Febuxostat
One 40 mg tablet once a day for 6 months
Other Name: Uloric

Primary Outcome Measures :
  1. BMI [ Time Frame: 6 months ]
  2. Serum Uric Acid [ Time Frame: 6 months ]
  3. Serum Creatinine [ Time Frame: 6 months ]
  4. Ambulatory Systolic Blood Pressure [ Time Frame: 6 months ]
    Systolic BP by ambulatory blood pressure monitor.

  5. Ambulatory Diastolic Blood Pressure [ Time Frame: 6 months ]
    Diastolic BP by ambulatory blood pressure monitor.

  6. Serum Glucose [ Time Frame: 6 months ]
  7. Serum Insulin [ Time Frame: 6 months ]
  8. Insulin Sensitivity Measured by HOMA (HOmeostasis Model Assessment) [ Time Frame: 6 months ]
  9. Seum Total Cholesterol [ Time Frame: 6 months ]
  10. Serum HDL-cholesterol [ Time Frame: 6 months ]
  11. Serum Triglycerides [ Time Frame: 6 months ]
  12. Urine Uric Acid [ Time Frame: 6 months ]
  13. Urine Creatinine [ Time Frame: 6 months ]
  14. Fractional Excretion UA [ Time Frame: 6 months ]
  15. Urine pH [ Time Frame: 6 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   21 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age > 21 years
  • Gout
  • Hyperuricemia (serum uric acid > 7.0 mg/dl in men and >6.0 mg/dl in women).

Exclusion Criteria:

  • Current treatment with insulin, azathioprine, mercaptopurine, or theophylline.
  • Treatment with febuxostat, allopurinol or other uricosuric agents (including losartan, probenecid) within the past year
  • Uncontrolled hypertension (clinic systolic blood pressure > 160 mmHg or diastolic blood pressure > 90 mmHg within the past 6 months)
  • Uncontrolled diabetes mellitus (HbA1c > 7%)
  • estimated GFR < 60 ml/min by MDRD
  • Elevated liver function tests (AST or ALT greater than 3 times the upper limit of normal)
  • Pregnancy

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01654276

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United States, Texas
UT Southwestern Medical Center
Dallas, Texas, United States, 75390-8885
Sponsors and Collaborators
University of Texas Southwestern Medical Center
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Principal Investigator: Naim M Maalouf, MD UT Southwestern Medical Center
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Naim Maalouf, Assistant Professor of Medicine, University of Texas Southwestern Medical Center Identifier: NCT01654276    
Other Study ID Numbers: MSA-FEB-137
First Posted: July 31, 2012    Key Record Dates
Results First Posted: January 13, 2017
Last Update Posted: June 18, 2018
Last Verified: May 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Additional relevant MeSH terms:
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Metabolic Syndrome
Insulin Resistance
Glucose Metabolism Disorders
Metabolic Diseases
Pathologic Processes
Gout Suppressants
Antirheumatic Agents