Journal
NUTRITION METABOLISM AND CARDIOVASCULAR DISEASES
Volume 24, Issue 5, Pages 524-531Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.numecd.2013.10.032
Keywords
Rice bran; Mesenteric artery; Obese Zucker rat; Microvascular function; Obesity
Funding
- Spanish Ministry of Science and Innovation [AGL2009-1159]
- FPU Fellowship from the Spanish Government
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Background and aim: Nutritional-based approaches aimed to prevent microvascular dysfunction associated to obesity present potential advantages over pharmacological strategies. Our aim was to test whether a rice bran enzymatic extract (RBEE)-supplemented diet could attenuate microvascular alterations in obese rats. Methods and results: Lean and obese Zucker rats were fed standard diet supplemented or not with 1% and 5% RBEE for 20 weeks. Functional studies were performed in small mesenteric arteries in isometric myograph. Immunoblotting and fluorescence studies were made in arterial homogenates and arterial sections, respectively. RBEE-supplementation restored microvascular function in obese rats through a marked increase in NO and endothelial-derived hyperpolarizing factor contribution by up-regulation of eNOS and calcium-activated potassium channels expression, respectively, in association to a substantial reduction of microvascular inflammation and superoxide anion formation. These data agrees with the beneficial actions of RBEE on dyslipidemia, hyperinsulinemia and hypertension in obesity. Conclusion: The multi-factorial properties of RBEE-diet, especially for restoring the function of small resistance arteries shows this dietary-based approach to be a promising candidate for prevention of microvascular alterations in obesity, which are crucial in cardiovascular events in obese subjects. (C) 2013 Elsevier B.V. All rights reserved.
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