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Updated: Aug 19, 2026

En Face Detection of Nitric Oxide and Superoxide in Endothelial Layer of Intact Arteries
Published on: February 25, 2016
Nitric oxide, peroxynitrite and lipoxygenase in atherogenesis: mechanistic insights
Homero Rubbo1, Valerie O'Donnell
1Departamento de Bioquímica and Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay. hrubbo@fmed.edu.uy
Abstract:
Nitric oxide (*NO) is a free radical species that diffuses and concentrates in the hydrophobic core of low-density lipoprotein (LDL) to serve as a potent antioxidant. Peroxynitrite, the product of the diffusion-limited reaction between *NO and superoxide anion, as well as lipoxygenase, represent relevant mediators of oxidative modifications in LDL. The focus of this review is the analysis of interactions between *NO, peroxynitrite and lipoxygenase during LDL oxidation, which are relevant in the development of the early steps as well as progression of atherosclerosis. The role of CO2 to redirect peroxynitrite reactivity in LDL, as well as the lipophilic antioxidant sparing actions of *NO, ascorbate and CO2 is also analyzed. In this context, the effects of novel potential pharmacological strategies against atherosclerosis such as Mn(III)porphyrins will be discussed.
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