Declining nitric oxide bioavailability in cardiovascular aging: mechanistic insights and emerging interventions

Abstract

Nitric oxide (NO) is essential for maintaining normal cardiovascular function, and accumulating evidence suggests that its diminished bioavailability contributes to endothelial dysfunction, vascular stiffening, and impaired cardiac performance - hallmarks of cardiovascular aging. This review posits that reduced NO bioavailability with age stems from impaired endothelial and neuronal NO synthase activity, increased oxidative stress, and metabolic shifts that drive cardiovascular decline. We further discuss emerging research which highlights potential interventions, including dietary nitrate supplementation, caloric restriction, and exercise, that may restore NO signaling and counteract age-related cardiovascular dysfunction. These findings underscore the growing recognition of NO as a key regulator of cardiovascular aging and a promising therapeutic target. Addressing NO-related deficits could open new avenues for preventing and treating age-associated cardiovascular diseases, reshaping strategies for promoting healthy aging and longevity.

Keywords

Nitric oxide / vascular dysfunction / cardiovascular aging / oxidative stress / myocardial remodeling / lifestyle interventions / Sirtuin 1 (SIRT1)

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