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Mechanisms of Cell Death Governed by the Balance between Nitrosative and Oxidative Stress

Authors

  • MICHAEL GRAHAM ESPEY,

    Corresponding author
    1. Radiation Biology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
      Address for correspondence: Michael Graham Espey, Ph.D., Radiation Biology Branch, National Institutes of Health/National Cancer Institute, Building 10, Room B3-B69, Bethesda, MD 20892. Voice: 301–496–7511; fax: 301–480–2238. e-mail: SP@nih.gov
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  • KATRINA M. MIRANDA,

    1. Radiation Biology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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  • MARTIN FEELISCH,

    1. Wolfson Institute for Biomedical Research, University College London, 140 Tottenham Court Road, London, W1P 9LN, UK
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  • JON FUKUTO,

    1. Department of Pharmacology, University of California, Los Angeles,California 90095, USA
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  • MATHEW B. GRISHAM,

    1. Department of Molecular and Cellular Physiology, Louisiana State University Medical Center, Shreveport, Louisiana 71130, USA
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  • MICHAEL P. VITEK,

    1. Division of Neurology, Duke University Medical Center, Durham, North Carolina 27710, USA
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  • DAVID A. WINK

    1. Radiation Biology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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Address for correspondence: Michael Graham Espey, Ph.D., Radiation Biology Branch, National Institutes of Health/National Cancer Institute, Building 10, Room B3-B69, Bethesda, MD 20892. Voice: 301–496–7511; fax: 301–480–2238. e-mail: SP@nih.gov

Abstract

Abstract: Many cellular functions in physiology are regulated by the direct interaction of NO with target biomolecules. In many pathophysiologic and toxicologic mechanisms, NO first reacts with oxygen, superoxide or other nitrogen oxides to subsequently elicit indirect effects. The balance between nitrosative stress and oxidative stress within a specific biological compartment can determine whether the presence of NO will be ultimately deleterious or beneficial. Nitrosative stress can be defined primarily through reactions mediated by N2O3, a reactive nitrogen oxide species generated by high fluxes of NO in an aerobic environment. In contrast, oxidative stress is mediated primarily by superoxide and peroxides. In addition to reactive oxygen species, several reactive nitrogen oxide species such as peroxynitrite, nitroxyl, and nitrogen dioxide can also impose oxidative stress to a cell. We here describe how the mechanisms of cell death are interwoven in the balance between the different chemical intermediates involved in nitrosative and oxidative stress.

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