Diabetic endothelial dysfunction: Role of reactive oxygen and nitrogen species production and poly(ADP-ribose) polymerase activation

Francisco Soriano, László Virág, Csaba Szabó

    Research output: Contribution to journalArticle

    123 Scopus citations

    Abstract

    Peroxynitrite and hydroxyl radicals are potent initiators of DNA single-strand breakage, which is an obligatory stimulus for the activation of the nuclear enzyme poly(ADP ribose) polymerase (PARP). In response to high glucose incubation medium in vitro, or diabetes and hyperglycemia in vivo, reactive nitrogen and oxygen species generation occurs. These reactive species trigger DNA single-strand breakage, which induces rapid activation of PARR PARP in turn depletes the intracellular concentration of its substrate, NAD+, slowing the rate of glycolysis, electron transport, and ATP formation. This process results in acute endothelial dysfunction in diabetic blood vessels. Accordingly, inhibitors of PARP protect against endothelial injury under these conditions. In addition to the direct cytotoxic pathway regulated by DNA injury and PARP activation, PARP also appears to modulate the course of inflammation by regulating the activation of nuclear factor κB, and the expression of a number of genes, including the gene for intercellular adhesion molecule 1 and the inducible nitric oxide synthase. The research into the role of PARP in diabetic vascular injury is now supported by novel tools, such as new classes of potent inhibitors of PARP and genetically engineered animals lacking the gene for PARR Pharmacological inhibition of PARP emerges as a potential approach for the experimental therapy of diabetic vascular dysfunction.

    Original languageEnglish (US)
    Pages (from-to)437-448
    Number of pages12
    JournalJournal of Molecular Medicine
    Volume79
    Issue number8
    DOIs
    StatePublished - Aug 29 2001

    Keywords

    • Cytokine
    • Diabetes vascular
    • Free radicals
    • Nitric oxide
    • Oxidants

    ASJC Scopus subject areas

    • Molecular Medicine
    • Drug Discovery
    • Genetics(clinical)

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