RESUMO
Analysis of antioxidant activity of synthesized selenourea derivatives showed that N,N'-substituted selenoureas inhibited Fe(III)-induced LPO in rat brain homogenate. On the other hand, oxygen- and sulfur-containing analogs exhibited no antioxidant activity or even slight prooxidant activity. Intramolecular alkylation of selenium atom also led to loss of antioxidant activity. Thus, antioxidant activity of the compounds was due to the presence of a nonalkylated selenium atom in N,N'-substituted selenourea analogs.
Assuntos
Antioxidantes/farmacologia , Compostos Férricos/farmacologia , Compostos Organosselênicos/farmacologia , Ureia/análogos & derivados , Animais , Peroxidação de Lipídeos/efeitos dos fármacos , Oxirredução/efeitos dos fármacos , Ratos , Espécies Reativas de Oxigênio/metabolismo , Ureia/farmacologiaRESUMO
Gamma(gamma)-synuclein is a member of synuclein family of cytoplasmic and predominantly neuronal proteins found only in vertebrates. Gamma-synuclein is abundant in axons and presynaptic terminals of neurons localized in brain regions involved in emotions, learning and memory. However, the role of gamma-synuclein in these brain functions was not previously assessed. We have demonstrated for the first time that the loss of gamma-synuclein results in a significant increase in the level of orientation response in novel environment and decrease in the level of state anxiety.
Assuntos
Ansiedade/psicologia , Comportamento Exploratório , gama-Sinucleína/fisiologia , Animais , Ansiedade/genética , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , gama-Sinucleína/genéticaRESUMO
This review focuses on the modeling of status epilepticus in animal brain and modern data on the mechanisms of epileptical seizures initiation using the pilocarpine binding with the muscarinic cholinoreceptors (litium pilocarpine model). The character of epileptics seizures in developing brain and adult brain of rats were investigated. The lines of modulation and inhibition epileptics statues by sacricine and intranasal application of neuropeptide thyroliberin in ultra-low doses are demonstrated. The role of the short-term changes (signal regulated kinase signaling cascade, Kv 4.2 potassium channels, hippocampal and cortical spike-wave discharges) and the long-term changes (loss of selective type of interneurons, excitatory circuits by mossy fiber sprouting) that promotion the epileptic state and recurrent seizures in limbic structure are discussed.
