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Titolo:
Dopamine oxidation alters mitochondrial respiration and induces permeability transition in brain mitochondria: Implications for Parkinson's disease
Autore:
Berman, SB; Hastings, TG;
Indirizzi:
Univ Pittsburgh, Dept Neurol, Pittsburgh, PA 15261 USA Univ Pittsburgh Pittsburgh PA USA 15261 Neurol, Pittsburgh, PA 15261 USA Univ Pittsburgh, Dept Neurosci, Pittsburgh, PA 15261 USA Univ Pittsburgh Pittsburgh PA USA 15261 eurosci, Pittsburgh, PA 15261 USA
Titolo Testata:
JOURNAL OF NEUROCHEMISTRY
fascicolo: 3, volume: 73, anno: 1999,
pagine: 1127 - 1137
SICI:
0022-3042(199909)73:3<1127:DOAMRA>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRON-TRANSPORT CHAIN; PROGRAMMED CELL-DEATH; COMPLEX-I DEFICIENCY; CYCLOSPORINE-A; LIVER-MITOCHONDRIA; MONOAMINE-OXIDASE; PROTON LEAK; NEURONS; CALCIUM; PORE;
Keywords:
dopamine; mitochondria; permeability transition; Parkinson's disease; quinone; respiration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
80
Recensione:
Indirizzi per estratti:
Indirizzo: Hastings, TG Univ Pittsburgh, Dept Neurol, S-505 Biomed Sci Tower, Pittsburgh, PA 15261USA Univ Pittsburgh S-505 Biomed Sci Tower Pittsburgh PA USA 15261
Citazione:
S.B. Berman e T.G. Hastings, "Dopamine oxidation alters mitochondrial respiration and induces permeability transition in brain mitochondria: Implications for Parkinson's disease", J NEUROCHEM, 73(3), 1999, pp. 1127-1137

Abstract

Both reactive dopamine metabolites and mitochondrial dysfunction have beenimplicated in the neurodegeneration of Parkinson's disease. Dopamine metabolites, dopamine quinone and reactive oxygen species, can directly alter protein function by oxidative modifications, and several mitochondrial proteins may be targets of this oxidative damage. In this study, we examined, using isolated brain mitochondria, whether dopamine oxidation products alter mitochondrial function. We found that exposure to dopamine quinone caused a large increase in mitochondrial resting state 4 respiration. This effect was prevented by GSH but not superoxide dismutase and catalase. In contrast, exposure to dopamine and monoamine oxidase-generated hydrogen peroxide resulted in a decrease in active state 3 respiration. This inhibition was prevented by both pargyline and catalase, We also examined the effects of dopamine oxidation products on the opening of the mitochondrial permeability transition pore, which has been implicated in neuronal cell death. Dopamine oxidation to dopamine quinone caused a significant increase in swelling of brain and liver mitochondria. This was inhibited by both the pore inhibitor cyclosporin A and GSH, suggesting that swelling was due to pore opening and related to dopamine quinone formation. In contrast, dopamine and endogenous monoamine oxidase had no effect on mitochondrial swelling. These findings suggest that mitochondrial dysfunction induced by products of dopamine oxidation may be involved in neurodegenerative conditions such as Parkinson's disease and methamphetamine-induced neurotoxicity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/02/20 alle ore 13:43:26