Peroxynitrite induced formation of the neurotoxins 5-S-cysteinyl-dopamine and DHBT-1: implications for Parkinson's disease and protection by polyphenols

Vauzour, David ORCID: https://orcid.org/0000-0001-5952-8756, Ravaioli, Giulia, Vafeiadou, Katerina, Rodriguez-Mateos, Ana, Angeloni, Cristina and Spencer, Jeremy P. E. (2008) Peroxynitrite induced formation of the neurotoxins 5-S-cysteinyl-dopamine and DHBT-1: implications for Parkinson's disease and protection by polyphenols. Archives of Biochemistry and Biophysics, 476 (2). pp. 145-151. ISSN 0003-9861

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Abstract

Mechanisms of nigral cell injury in Parkinson's disease remain unclear, although a combination of increased oxidative stress, the formation of catecholamine-quinones and the subsequent formation of neurotoxic cysteinyl-catecholamine conjugates may contribute. In the present study, peroxynitrite was observed to generate both 2-S- and 5-S-cysteinyl-dopamine and a dihydrobenzothiazine species, DHBT-1, following the reaction of dopamine with l-cysteine. The formation of 5-S-cysteinyl-dopamine and DHBT-1 in the presence of peroxynitrite induced significant neuronal injury. Pre-treatment of cortical neurons with pelargonidin, quercetin, hesperetin, caffeic acid, the 4'-O-Me derivatives of catechin and epicatechin (0.1-3.0 microM) resulted in concentration dependant protection against 5-S-cysteinyl-dopamine-induced neurotoxicity. These data suggest that polyphenols may protect against neuronal injury induced by endogenous neurotoxins relevant to the aetiology of the Parkinson disease.

Item Type:	Article
Faculty \ School:	Faculty of Medicine and Health Sciences > Norwich Medical School
Depositing User:	David Vauzour
Date Deposited:	29 Feb 2012 12:09
Last Modified:	23 Oct 2022 06:32
URI:	https://ueaeprints.uea.ac.uk/id/eprint/34822
DOI:	10.1016/j.abb.2008.03.011

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