Document Detail

Polyphenol-containing azuki bean (Vigna angularis) extract attenuates blood pressure elevation and modulates nitric oxide synthase and caveolin-1 expressions in rats with hypertension.
MedLine Citation:
PMID:  19157815     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND AIMS: Azuki beans (Vigna angularis) contain polyphenols such as proanthocyanidins that exhibit potential radical scavenging activities. We herein investigated the effects of polyphenol-containing azuki bean extract (ABE) on elevated blood pressure, nitric oxide (NO) production, and expressions of endothelial NO synthase (eNOS), inducible NOS (iNOS), and caveolin-1 proteins in the aorta and kidney of chronically hypertensive rats. METHODS AND RESULTS: Spontaneously hypertensive rats (SHRs/Izm) with approximately 200 mm Hg systolic blood pressure (SBP) were randomly divided into 2 groups fed either 0% or 0.9% ABE-containing diet. Age-matched normotensive Wistar-Kyoto rats were used as the control. The content of 24-h urinary nitrate/nitrite (NOx) excretion was measured to evaluate NO production. After 8 weeks of treatment, the eNOS, iNOS, and caveolin-1 protein expressions in the aorta and kidney were analyzed by western blotting. The SBP of the ABE-treated SHR was significantly lower than that of the untreated SHR. The level of 24-h urinary NOx excretion was significantly higher in the ABE-treated SHR than in the untreated SHR. The eNOS and iNOS expressions in the aorta and kidney were remarkably upregulated in the untreated SHR but suppressed in the ABE-treated SHR. The vascular and renal caveolin-1 expressions were upregulated in the ABE-treated SHR. CONCLUSIONS: ABE reduced the elevated blood pressure and increased NO production in long-term treatment. It may be associated with the modulation of eNOS and iNOS protein expressions in the aorta and kidney during the development of hypertension.
Y Mukai; S Sato
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Publication Detail:
Type:  Journal Article     Date:  2009-01-20
Journal Detail:
Title:  Nutrition, metabolism, and cardiovascular diseases : NMCD     Volume:  19     ISSN:  1590-3729     ISO Abbreviation:  Nutr Metab Cardiovasc Dis     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-07-27     Completed Date:  2009-10-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111474     Medline TA:  Nutr Metab Cardiovasc Dis     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  491-7     Citation Subset:  IM    
Department of Life Sciences, Graduate School of Health Sciences, Aomori University of Health and Welfare, Mase 58-1, Hamadate, Aomori 030-8505, Japan.
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MeSH Terms
Aorta, Thoracic / metabolism
Blood Pressure / drug effects*
Blotting, Western
Caveolin 1 / biosynthesis*
Chronic Disease
Fabaceae / chemistry*
Flavonoids / chemistry,  pharmacology*
Heart Rate / drug effects
Hypertension / pathology,  physiopathology,  prevention & control*
Kidney / metabolism,  pathology
Nitric Oxide / urine
Nitric Oxide Synthase Type II / metabolism*
Nitric Oxide Synthase Type III / metabolism*
Phenols / chemistry,  pharmacology*
Plant Extracts / pharmacology
Rats, Inbred SHR
Rats, Inbred WKY
Reg. No./Substance:
0/Caveolin 1; 0/Flavonoids; 0/Phenols; 0/Plant Extracts; 0/polyphenols; 10102-43-9/Nitric Oxide; EC Oxide Synthase Type II; EC Oxide Synthase Type III

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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