Lookup NU author(s): Dr Mario Siervo,
Dr Filippo Scialo,
Dr Oliver Shannon,
Dr Blossom Stephan,
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Copyright © The Authors 2018. CVD are characterised by a multi-factorial pathogenesis. Key pathogenetic steps in the development of CVD are the occurrence of endothelial dysfunction and formation of atherosclerotic lesions. Reduced nitric oxide (NO) bioavailability is a primary event in the initiation of the atherosclerotic cascade. NO is a free radical with multiple physiological functions including the regulation of vascular resistance, coagulation, immunity and oxidative metabolism. The synthesis of NO proceeds via two distinct pathways identified as enzymatic and non-enzymatic. The former involves the conversion of arginine into NO by the NO synthases, whilst the latter comprises a two-step reducing process converting inorganic nitrate into nitrite and subsequently NO. Inorganic is present in water and food, particularly beetroot and green leafy vegetables. Several investigations have therefore used the non-enzymatic NO pathway as a target for nutritional supplementation ( salts) or dietary interventions (high- foods) to increase NO bioavailability and impact on cardiovascular outcomes. Some studies have reported positive effects of dietary on systolic blood pressure and endothelial function in patients with hypertension and chronic heart failure. Nevertheless, results have been inconsistent and the size of the effect appears to be declining in older individuals. Additionally, there is a paucity of studies for disorders such as diabetes, CHD and chronic kidney failure. Thus, whilst dietary supplementation could represent an effective and viable strategy for the primary and secondary prevention of age-related cardiovascular and metabolic diseases, more large-scale, robust studies are awaited to confirm or refute this notion.
Author(s): Siervo M, Scialo F, Shannon OM, Stephan BCM, Ashor AW
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: The Nutrition Society Irish Section Meeting
Year of Conference: 2018
Online publication date: 10/05/2018
Acceptance date: 02/04/2016
Publisher: Cambridge University Press
Series Title: Proceedings of the Nutrition Society