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Peroxynitrite: an endogenous oxidizing and nitrating agent.

C Ducrocq1, B Blanchard, B Pignatelli

  • 1Institut de Chimie des Substances Naturelles, CNRS, Gif-sur-Yvette, France.

Cellular and Molecular Life Sciences : CMLS
|August 12, 1999
PubMed
Summary
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Peroxynitrite, formed from nitric oxide and superoxide, mediates cellular injury by reacting with vital molecules. Its complex chemistry involves oxidation and nitration, influenced by various factors.

Area of Science:

  • Biochemistry
  • Cellular Biology
  • Pathology

Background:

  • Peroxynitrite is a reaction product of nitric oxide and superoxide.
  • It is implicated as a mediator of cellular and tissue injury in pathological conditions.
  • It forms at the intersection of two radical-generating metabolic pathways.

Purpose of the Study:

  • To elucidate the complex chemistry and biological effects of peroxynitrite.
  • To understand the reactivity of peroxynitrite with biological molecules.
  • To explore factors influencing peroxynitrite's chemical properties.

Main Methods:

  • Review of chemical properties and reactivity of peroxynitrite.
  • Analysis of peroxynitrite's interactions with amino acids, nucleic bases, and antioxidants.

Related Experiment Videos

  • Investigation of factors affecting peroxynitrite's chemical behavior, including CO2 and metal compounds.

    • Main Results:

    • Peroxynitrite reacts with a wide array of molecules, including amino acids (cysteine, methionine, tyrosine, tryptophan), nucleic bases, and antioxidants.
    • Key reactions include oxidation and nitration.
    • Peroxynitrite's chemical properties are modulated by CO2, metallic compounds, reagent concentrations, and kinetic factors.
    • Complex chemistry involves various structural forms and active intermediates.

    Conclusions:

    • Peroxynitrite's reactivity underlies its role in cellular and tissue damage.
    • Understanding its complex chemistry is crucial for comprehending its pathological significance.
    • Factors like CO2 and metal ions significantly influence peroxynitrite's biological activity.