Thirty Years of Saying NO: Sources, Fate, Actions, and Misfortunes of the Endothelium-Derived Vasodilator Mediator.
Level 5 - mechanism / opinion, no new human data
Narrative review of biological mechanisms without systematic search methodology or new empirical human data.
PubMed 27390338 · doi:10.1161/CIRCRESAHA.116.306531
What was done
This narrative review summarizes 30 years of research regarding the synthesis, regulation, downstream targets, and pathophysiological degradation of endothelial nitric oxide (NO), focusing on endothelial NO synthase (eNOS) signaling, causes of endothelial dysfunction, and potential therapeutic targets.
What was found
The abstract presents a mechanistic overview without quantitative data or statistical effect estimates. It outlines that eNOS activity is regulated by calcium, post-translational modifications, circulating agonists, autacoids, and shear stress, acting primarily via soluble guanylyl cyclase to produce cGMP. Mechanisms driving NO dysfunction in aging, obesity, diabetes, and hypertension include oxidative stress from reactive oxygen species, elevated asymmetrical dimethylarginine, substrate and cofactor depletion, mineralocorticoid receptor stimulation, and Rho-kinase activation. Interventions that support eNOS function include estrogen maintenance, adiponectin upregulation, and SIRT1 induction.
Why it matters
Understanding the multi-factorial biochemical mechanisms causing eNOS uncoupling and NO destruction helps identify therapeutic targets to restore endothelial vasodilation and mitigate early atherosclerotic progression.
Limits
As a narrative review, the paper does not use systematic literature search methods or quantitative meta-analytic pooling. The abstract provides purely qualitative mechanistic descriptions with no human clinical trial outcomes, sample sizes, or numerical effect sizes reported.
Cited by
- supports Shear stress on arterial endothelium increases nitric oxide production, which dilates blood vessels, prevents platelet clumping, and reduces cholesterol plaque formation.