Uric acid and hypertension
Daniel I Feig1, Duk-Hee Kang, Takahiko Nakagawa
1Department of Pediatrics, Renal Section, MC3-2482, Baylor College of Medicine, 1102 Bates Street, Houston, TX 77030, USA. dfeig@bcm.tmc.edu
Insights
Recent studies suggest elevated uric acid levels may predict and contribute to essential hypertension in both adults and children. Further research is exploring if managing uric acid can prevent or treat high blood pressure.
Area of Science:
- Cardiovascular Disease Epidemiology
- Nephrology
- Internal Medicine
Background:
- Recent epidemiologic studies highlight a potential link between uric acid and essential hypertension.
- Elevated serum uric acid is identified as a predictor of incident hypertension and blood pressure progression in longitudinal studies.
- A pediatric study found high uric acid levels in over 90% of children with essential hypertension.
Purpose of the Study:
- To summarize recent evidence supporting the role of uric acid in essential hypertension.
- To review laboratory findings that elucidate the mechanisms by which uric acid may cause hypertension.
- To discuss ongoing clinical trials investigating uric acid's role in human hypertension.
Main Methods:
- Review of epidemiologic studies published in the past 3 years.
- Analysis of data from large, longitudinal cardiovascular disease studies.
- Examination of laboratory studies, including animal models (rat model).
Main Results:
- Elevated serum uric acid predicts incident hypertension and blood pressure progression.
- Uric acid induces hypertension in rats via renin-angiotensin system activation, nitric oxide downregulation, and endothelial dysfunction.
- High uric acid levels are prevalent in children with essential hypertension.
Conclusions:
- Clinical and laboratory evidence increasingly supports a role for uric acid in essential hypertension.
- Mechanistic studies reveal pathways through which uric acid may contribute to hypertension.
- Ongoing trials aim to confirm uric acid's role in human hypertension and its therapeutic potential.
Abstract:
Epidemiologic studies published during the past 3 years support the possible role of uric acid in the onset of essential hypertension. Data from several large, longitudinal cardiovascular disease studies indicate that elevated serum uric acid is a predictor of incident hypertension and blood pressure progression. In a pediatric study, more than 90% of children with essential hypertension have serum uric acid levels above 5.5 mg/dL. During the same period, laboratory studies have provided compelling mechanistic evidence to explain the clinical observations. Uric acid causes hypertension in a rat model through the activation of the renin-angiotensin system, downregulation of nitric oxide, and induction of endothelial dysfunction and vascular smooth muscle proliferation. Ongoing clinical trials will elucidate the role of uric acid in human hypertension and will determine whether control of uric acid may be a new way to prevent or treat essential hypertension.
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