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Induction of oxidative stress by the metabolites accumulating in isovaleric acidemia in brain cortex of young rats.
Solano, Alexandre F; Leipnitz, Guilhian; De Bortoli, Giorgia M; Seminotti, Bianca; Amaral, Alexandre U; Fernandes, Carolina G; Latini, Alexandra S; Dutra-Filho, Carlos S; Wajner, Moacir.
Afiliação
  • Solano AF; Departamento de Bioquimica, Instituto de Ciencias Basicas da Saude, UFRGS, Porto Alegre, RS, Brazil.
Free Radic Res ; 42(8): 707-15, 2008 Aug.
Article em En | MEDLINE | ID: mdl-18661426
The present work investigated the in vitro effects of isovaleric acid (IVA) and isovalerylglycine (IVG), which accumulate in isovaleric acidemia (IVAcidemia), on important parameters of oxidative stress in supernatants and mitochondrial preparations from brain of 30-day-old rats. IVG, but not IVA, significantly increased TBA-RS and chemiluminescence values in cortical supernatants. Furthermore, the addition of free radical scavengers fully prevented IVG-induced increase of TBA-RS. IVG also decreased GSH concentrations, whereas IVA did not modify this parameter in brain supernatants. Furthermore, IVG did not alter lipid peroxidation or GSH concentrations in mitochondrial preparations, indicating that the generation of oxidants by IVG was dependent on cytosolic mechanisms. On the other hand, IVA significantly induced carbonyl formation both in supernatants and purified mitochondrial preparations from rat brain, with no effect observed for IVG. Therefore, it is presumed that oxidative damage may be at least in part involved in the pathophysiology of the neuropathology of IVAcidemia.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ácidos Pentanoicos / Córtex Cerebral / Estresse Oxidativo / Glicina / Erros Inatos do Metabolismo Limite: Animals Idioma: En Ano de publicação: 2008 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ácidos Pentanoicos / Córtex Cerebral / Estresse Oxidativo / Glicina / Erros Inatos do Metabolismo Limite: Animals Idioma: En Ano de publicação: 2008 Tipo de documento: Article