TitleNitrate exposure reprograms hepatic amino acid and nutrient sensing pathways prior to exercise: A metabolomic and transcriptomic investigation in zebrafish .
Publication TypeJournal Article
Year of Publication2022
AuthorsKeller, RM, Beaver, LM, Prater, MC, Truong, L, Tanguay, RL, Stevens, JF, Hord, NG
JournalFront Mol Biosci
Date Published2022

Nitrate supplementation is a popular ergogenic aid that improves exercise performance by reducing oxygen consumption during exercise. We investigated the effect of nitrate exposure and exercise on metabolic pathways in zebrafish liver. Fish were exposed to sodium nitrate (606.9 mg/L), or control water, for 21 days and analyzed at intervals during an exercise test. We utilized untargeted liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis and measured gene expression of 24 genes central to energy metabolism and redox signaling. We observed a greater abundance of metabolites involved in endogenous nitric oxide (NO) metabolism and amino acid metabolism in nitrate-treated liver at rest, compared to rested controls. In the absence of exercise, nitrate treatment upregulated expression of genes central to nutrient sensing () protein synthesis () and purine metabolism () and downregulated expression of genes involved in mitochondrial fat oxidation (). Our data support a role for sub-chronic nitrate treatment in the improvement of exercise performance, in part, by improving NO bioavailability, sparing arginine, and modulating hepatic gluconeogenesis and glycolytic capacity in the liver.

Alternate JournalFront Mol Biosci
PubMed ID35928228
PubMed Central IDPMC9343839
Grant ListP30 ES030287 / ES / NIEHS NIH HHS / United States
S10 RR027878 / RR / NCRR NIH HHS / United States