Abstract
Complications of diabetes rather than the primary disease itself pose the most challenging aspects of diabetic patient management. Diabetic vascular dysfunction represents a problem of great clinical importance underlying the development of many of the complications including retinopathy, neuropathy and the increased risk of stroke, hypertension and myocardial infarction. Hyperglycaemia stimulates many cellular pathways, which result in oxidative stress, including increased production of advanced glycosylated end products, protein kinase C activation, and polyol pathway flux. Endothelial cells produce nitric oxide constitutively to regulate normal vascular tone; the combination of this nitric oxide with the hyperglycaemia-induced superoxide formation results in the production of reactive nitrogen species such as peroxynitrite. This nitrosative stress results in many damaging cellular effects, but it is these effects on DNA, which are the most damaging to the cell function; nitrosative stress induces DNA single stand breaks and leads to over-activation of the DNA repair enzyme poly (ADP-ribose) polymerase (PARP). PARP activation contributes to endothelial cell dysfunction and appears to be the central mediator in all the mechanisms by which hyperglycaemia-induces diabetic vascular dysfunction. This review focuses on the mechanism by which hyperglycaemia induces nitrosative stress and the role PARP activation plays in diabetic vascular dysfunction.
Keywords: peroxynitrite, poly (adp-ribose) polymerase, diabetes, endothelial, vascular, nitric oxide, superoxide
Current Vascular Pharmacology
Title: Role of Nitrosative Stress and Poly(ADP-ribose) Polymerase Activation in Diabetic Vascular Dysfunction
Volume: 3 Issue: 3
Author(s): Jon G. Mabley and Francisco Garcia Soriano
Affiliation:
Keywords: peroxynitrite, poly (adp-ribose) polymerase, diabetes, endothelial, vascular, nitric oxide, superoxide
Abstract: Complications of diabetes rather than the primary disease itself pose the most challenging aspects of diabetic patient management. Diabetic vascular dysfunction represents a problem of great clinical importance underlying the development of many of the complications including retinopathy, neuropathy and the increased risk of stroke, hypertension and myocardial infarction. Hyperglycaemia stimulates many cellular pathways, which result in oxidative stress, including increased production of advanced glycosylated end products, protein kinase C activation, and polyol pathway flux. Endothelial cells produce nitric oxide constitutively to regulate normal vascular tone; the combination of this nitric oxide with the hyperglycaemia-induced superoxide formation results in the production of reactive nitrogen species such as peroxynitrite. This nitrosative stress results in many damaging cellular effects, but it is these effects on DNA, which are the most damaging to the cell function; nitrosative stress induces DNA single stand breaks and leads to over-activation of the DNA repair enzyme poly (ADP-ribose) polymerase (PARP). PARP activation contributes to endothelial cell dysfunction and appears to be the central mediator in all the mechanisms by which hyperglycaemia-induces diabetic vascular dysfunction. This review focuses on the mechanism by which hyperglycaemia induces nitrosative stress and the role PARP activation plays in diabetic vascular dysfunction.
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Cite this article as:
Mabley G. Jon and Soriano Garcia Francisco, Role of Nitrosative Stress and Poly(ADP-ribose) Polymerase Activation in Diabetic Vascular Dysfunction, Current Vascular Pharmacology 2005; 3 (3) . https://dx.doi.org/10.2174/1570161054368571
DOI https://dx.doi.org/10.2174/1570161054368571 |
Print ISSN 1570-1611 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6212 |
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