title: Protective effect of S-allylcysteine on 3-nitropropionic acid-induced lipid peroxidation and mitochondrial dysfunction in rat brain synaptosomes.
abstract: 3-Nitropropionic acid is a neurotoxin that irreversibly inhibits succinate dehydrogenase, a relevant enzyme constituting the complex II of the respiratory chain during mitochondrial electron transport. 3-Nitropropionic acid is known to produce oxidative/nitrosative stress and evokes an experimental model of Huntington's disease. In this work we evaluated the effects of the antioxidant compound and major organosulfur garlic derivative, S-allylcysteine, on lipid peroxidation and mitochondrial dysfunction induced by 3-nitropropionic acid in synaptosomal fractions from rat brain. 3-Nitropropionic acid, at concentrations ranging 0.75-2.5 mM, produced enhanced levels of lipid peroxidation, while increasing concentrations of S-allylcysteine (0.1-2 mM) decreased the peroxidative action of 3-nitropropionic acid (1 mM) in synaptosomal fractions in a concentration-dependent manner. S-Allylcysteine (0.75 mM) also prevented the 3-nitropropionic acid (1mM)-induced mitochondrial dysfunction. These findings suggest that the protective actions that S-allylcysteine exert on the in vitro neurotoxicity induced by 3-nitropropionic acid are mediated by its antioxidant properties.
authors.affiliation: Laboratorio de Aminoácidos Excitadores, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez S.S.A., México 14269, D.F., Mexico.
authors.forename: Verónica
authors.initials: V
authors.lastname: Pérez-De La Cruz
authors.forename: Carolina
authors.initials: C
authors.lastname: González-Cortés
authors.forename: José
authors.initials: J
authors.lastname: Pedraza-Chaverrí
authors.forename: Perla D
authors.initials: PD
authors.lastname: Maldonado
authors.forename: Leticia
authors.initials: L
authors.lastname: Andrés-Martínez
authors.forename: Abel
authors.initials: A
authors.lastname: Santamaría
mesh_terms: D000818:Animals; D001921:Brain / Q000166:cytology*; D003545:Cysteine / Q000031:analogs & derivatives* / Q000627:therapeutic use; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D028361:Mitochondrial Diseases / Q000139:chemically induced / Q000378:metabolism / Q000517:prevention & control*; D018696:Neuroprotective Agents / Q000627:therapeutic use*; D009574:Nitro Compounds / Q000494:pharmacology; D011422:Propionates / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D013574:Synaptosomes / Q000187:drug effects*; D013778:Tetrazolium Salts; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism
chemical_list: D018696:Neuroprotective Agents; D009574:Nitro Compounds; D011422:Propionates; D013778:Tetrazolium Salts; D017392:Thiobarbituric Acid Reactive Substances; C042207:4-anisyltetrazolium blue; C065299:S-allylcysteine; D003545:Cysteine; C015392:3-nitropropionic acid