Hypertension and adverse cardiovascular outcomes affect individuals with gout and hyperuricemia at disproportionately high rates. Rat models and epidemiological studies have provided significant preliminary evidence for an association between serum urate and hypertension. To further support this hypothesis, urate lowering therapy with allopurinol has been associate with decreased blood pressure in adolescents with hyperuricemia, in one small study. No further studies have confirmed this hypothesis and no translational studies have defined the mechanisms of action through which urate lowering may be contributing to hypertension control in humans. Our major objective is to determine if and through which physiologic mechanisms urate lowering therapy is useful for the treatment of hypertension. Since hypertension is an key comorbid condition in individuals with gout and hyperuricemia, elucidating novel mechanisms for the management of hypertension will be specially beneficial gout patients. We also will focus on the UAB CORT subtheme by studying racial/ethnic differences with a focus in African Americans who disproportionately suffer from this disorder and have differential responses to hypertension therapies.
The Specific Aims of our study aims are to: 1: Determine if in young adults with pre- or stage I hypertension urate-lowering therapy with 300 mg of allopurinol once daily for one month will: a) Induce change in highly sensitive C-reactive protein, b) Induce change in endothelial function, and c) Lower blood pressure 2: Determine if urate-lowering therapy as in Aim 1 induces changes in highly sensitive C-reactive protein, endothelial function and blood pressure that are proportional with the urate lowering achieved. A secondary hypothesis Is that African Americans will have differential responses in the study outcomes compared with other races/ethnicities. This translational study (n= 112 subjects) with physiologic measurements will be a double-blinded, randomized, placebo-controlled, cross-over trial. The target population will be young adults (ages 18-35) with pre-hypertension (SBP 120-139/DBP 80-89) or stage I hypertension (SBP 140-159/DBP 90-99) and with serum urates of >/= 5.0 mg/dL in men and >/= 4.0 mg/dL in women. This novel multi-disciplinary translational study will generate knowledge on the mechanism by which ULT lowers blood pressure and will provide evidence that can be translated into clinical practice for patients with hyperuricemia and gout.

Public Health Relevance

To confirm the usefulness and elucidate the mechanisms for a novel approach for hypertension prevention and control, specially relevant in individuals with hyperuricemia and gout and that can greatly improve cardiovascular outcomes in diverse populations.

Agency
National Institute of Health (NIH)
Institute
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
Type
Specialized Center (P50)
Project #
1P50AR060772-01A1
Application #
8343827
Study Section
Special Emphasis Panel (ZAR1-KM (M1))
Project Start
2012-09-01
Project End
2017-08-31
Budget Start
2012-09-01
Budget End
2013-08-31
Support Year
1
Fiscal Year
2012
Total Cost
$382,463
Indirect Cost
$94,622
Name
University of Alabama Birmingham
Department
Type
DUNS #
063690705
City
Birmingham
State
AL
Country
United States
Zip Code
35294
Singh, Jasvinder A; Ramachandaran, Rekha (2016) Does rural residence impact total ankle arthroplasty utilization and outcomes? Clin Rheumatol 35:381-6
Saddekni, Michael B; Saag, Kenneth G; Dudenbostel, Tanja et al. (2016) The effects of urate lowering therapy on inflammation, endothelial function, and blood pressure (SURPHER) study design and rationale. Contemp Clin Trials 50:238-44
Coburn, Brian W; Cheetham, T Craig; Rashid, Nazia et al. (2016) Rationale and design of the randomized evaluation of an Ambulatory Care Pharmacist-Led Intervention to Optimize Urate Lowering Pathways (RAmP-UP) Study. Contemp Clin Trials 50:106-15
Singh, Jasvinder A; Yu, Shaohua (2016) Gout-related inpatient utilization: a study of predictors of outcomes and time trends. Arthritis Res Ther 18:57
Singh, Jasvinder A; Ramachandran, Rekha (2016) Time trends in total ankle arthroplasty in the USA: a study of the National Inpatient Sample. Clin Rheumatol 35:239-45
Reynolds, Richard J; Vazquez, Ana I; Srinivasasainagendra, Vinodh et al. (2016) Serum urate gene associations with incident gout, measured in the Framingham Heart Study, are modified by renal disease and not by body mass index. Rheumatol Int 36:263-70
Singh, Jasvinder A; Yu, Shaohua (2016) Utilization due to chronic obstructive pulmonary disease and its predictors: a study using the U.S. National Emergency Department Sample (NEDS). Respir Res 17:1
Singh, Jasvinder A; Yu, Shaohua (2016) Time Trends, Predictors, and Outcome of Emergency Department Use for Gout: A Nationwide US Study. J Rheumatol 43:1581-8
Singh, Jasvinder A; Qu, Haiyan; Yazdany, Jinoos et al. (2015) Barriers to Medication Decision Making in Women with Lupus Nephritis: A Formative Study using Nominal Group Technique. J Rheumatol 42:1616-23
Singh, Jasvinder A; Ramachandran, Rekha (2015) Does hospital volume predict outcomes and complications after total shoulder arthroplasty in the US? Arthritis Care Res (Hoboken) 67:885-90

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