Direct comparison of inorganic nitrite and nitrate on vascular dysfunction and oxidative damage in experimental arterial hypertension.

Autor: Stamm P; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany; German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany., Oelze M; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany., Steven S; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany., Kröller-Schön S; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany., Kvandova M; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany., Kalinovic S; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany., Jasztal A; Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Krakow, Poland., Kij A; Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Krakow, Poland., Kuntic M; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany., Bayo Jimenez MT; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany., Proniewski B; Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Krakow, Poland., Li H; Department of Pharmacology, University Medical Center Mainz, Mainz, Germany., Schulz E; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany; Department of Cardiology, Celle General Hospital, Celle, Germany., Chlopicki S; Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Krakow, Poland; Department of Pharmacology, Medical College of the Jagiellonian University, Krakow, Poland., Daiber A; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany; German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany. Electronic address: daiber@uni-mainz.de., Münzel T; Department of Cardiology, Cardiology I, Laboratory of Molecular Cardiology, University Medical Center Mainz, Mainz, Germany; German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany. Electronic address: tmuenzel@uni-mainz.de.
Jazyk: angličtina
Zdroj: Nitric oxide : biology and chemistry [Nitric Oxide] 2021 Sep 01; Vol. 113-114, pp. 57-69. Date of Electronic Publication: 2021 Jun 04.
DOI: 10.1016/j.niox.2021.06.001
Abstrakt: Arterial hypertension is one of the major health risk factors leading to coronary artery disease, stroke or peripheral artery disease. Dietary uptake of inorganic nitrite (NO 2 - ) and nitrate (NO 3 - ) via vegetables leads to enhanced vascular NO bioavailability and provides antihypertensive effects. The present study aims to understand the underlying vasoprotective effects of nutritional NO 2 - and NO 3 - co-therapy in mice with angiotensin-II (AT-II)-induced arterial hypertension. High-dose AT-II (1 mg/kg/d, 1w, s. c.) was used to induce arterial hypertension in male C57BL/6 mice. Additional inorganic nitrite (7.5 mg/kg/d, p. o.) or nitrate (150 mg/kg/d, p. o.) were administered via the drinking water. Blood pressure (tail-cuff method) and endothelial function (isometric tension) were determined. Oxidative stress and inflammation markers were quantified in aorta, heart, kidney and blood. Co-treatment with inorganic nitrite, but not with nitrate, normalized vascular function, oxidative stress markers and inflammatory pathways in AT-II treated mice. Of note, the highly beneficial effects of nitrite on all parameters and the less pronounced protection by nitrate, as seen by improvement of some parameters, were observed despite no significant increase in plasma nitrite levels by both therapies. Methemoglobin levels tended to be higher upon nitrite/nitrate treatment. Nutritional nitric oxide precursors represent a non-pharmacological treatment option for hypertension that could be applied to the general population (e.g. by eating certain vegetables). The more beneficial effects of inorganic nitrite may rely on superior NO bioactivation and stronger blood pressure lowering effects. Future large-scale clinical studies should investigate whether hypertension and cardiovascular outcome in general can be influenced by dietary inorganic nitrite therapy.
(Copyright © 2021 The Author(s). Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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