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Vitamin D3, L‑Arginine, L‑Citrulline, and Antioxidant Supplementation Enhances Nitric Oxide Bioavailability and Reduces Oxidative Stress in the Vascular Endothelium – Clinical Implications for Cardiovascular System

1, 1

  1. 1Department of Chemistry and Biochemistry, Nanomedical Research Laboratories, Ohio University, Athens, Ohio, USA.

CORRESPONDENCE

Tadeusz Malinski

Department of Chemistry and Biochemistry, Nanomedical Research Laboratories, Ohio University, Athens, Ohio, USA.

malinski@ohio.edu

Volume 12, Issue 1 · pp. 17-23 · 2020 · DOI: 10.4103/pr.pr_79_19

ABSTRACT

Background: Nitric oxide (NO) is a crucial signaling molecule which regulates the blood flow and prevents the adhesion of blood components to the vascular wall. A deficiency in bioavailable NO concentration is associated with the dysfunction of endothelial NO synthase (eNOS) and/or an increase in oxidative stress. The deficiency of bioavailable NO is a common denominator of several cardiovascular diseases, including diabetes, atherosclerosis, and hypertension.Materials and Methods: We used a nanomedical technology to elucidate the balance between bioavailable NO and oxidative stress (peroxynitrite ONOO−) in human umbilical vein endothelial cells (HUVECs) treated with a supplement containing L‑arginine, L‑citrulline, Vitamin D3, and antioxidants. Nanosensors, with a diameter of 200–300 nm, are capable of measuring in situ NO and peroxynitrite (ONOO−) concentrations produced by single endothelial cells.Results: The ratio of the concentration of cytoprotective NO [NO] to the concentration of cytotoxic peroxynitrite [ONOO−] was used to estimate the efficiency of eNOS. HUVECs incubated with L‑citrulline, L‑arginine, and Vitamin D3 increased the [NO]/[ONOO−] ratio by 25%, while in the presence of antioxidants, the increase was 15%. The synergistic effect between the mix of L‑arginine, L‑citrulline, Vitamin D3, and antioxidants was a favorable increase of the overall [NO]/[ONOO−] ratio by 50%.Conclusion: The findings of the study presented here clearly indicate that L‑arginine, L‑citrulline, and Vitamin D3 can significantly alter the function of the endothelium and NO production, in a favorable manner, while pointedly reducing ONOO− – the main component of oxidative stress. This effect can be significantly potentiated in the presence of antioxidants.

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    Dawoud, H., & Malinski, T. (2020). Vitamin D3, L‑Arginine, L‑Citrulline, and Antioxidant Supplementation Enhances Nitric Oxide Bioavailability and Reduces Oxidative Stress in the Vascular Endothelium – Clinical Implications for Cardiovascular System. Pharmacognosy Research, 12(1), 17-23. https://doi.org/10.4103/pr.pr_79_19

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    © 2020 Author(s)

    This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms. CC BY-NC-SA 4.0