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- W2896060709 abstract "Dietary NO3- (nitrate) and NO2- (nitrite) support ˙NO (nitric oxide) generation and downstream vascular signaling responses. These nitrogen oxides also generate secondary nitrosating and nitrating species that react with low molecular weight thiols, heme centers, proteins, and unsaturated fatty acids. To explore the kinetics of NO3-and NO2-metabolism and the impact of dietary lipid on nitrogen oxide metabolism and cardiovascular responses, the stable isotopes Na15NO3 and Na15NO2 were orally administered in the presence or absence of conjugated linoleic acid (cLA). The reduction of 15NO2- to 15NO was indicated by electron paramagnetic resonance spectroscopy detection of hyperfine splitting patterns reflecting 15NO-deoxyhemoglobin complexes. This formation of 15NO also translated to decreased systolic and mean arterial blood pressures and inhibition of platelet function. Upon concurrent administration of cLA, there was a significant increase in plasma cLA nitration products 9- and 12-15NO2-cLA. Coadministration of cLA with 15NO2- also impacted the pharmacokinetics and physiological effects of 15NO2-, with cLA administration suppressing plasma NO3-and NO2-levels, decreasing 15NO-deoxyhemoglobin formation, NO2-inhibition of platelet activation, and the vasodilatory actions of NO2-, while enhancing the formation of 9- and 12-15NO2-cLA. These results indicate that the biochemical reactions and physiological responses to oral 15NO3-and 15NO2-are significantly impacted by dietary constituents, such as unsaturated lipids. This can explain the variable responses to NO3-and NO2-supplementation in clinical trials and reveals dietary strategies for promoting the generation of pleiotropic nitrogen oxide-derived lipid signaling mediators. Clinical Trial Registration- URL: http://www.clinicaltrials.gov . Unique identifier: NCT01681836." @default.
- W2896060709 created "2018-10-26" @default.
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- W2896060709 date "2017-09-01" @default.
- W2896060709 modified "2023-10-18" @default.
- W2896060709 title "Conjugated Linoleic Acid Modulates Clinical Responses to Oral Nitrite and Nitrate" @default.
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