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Parkinson's disease is an incurable progressive neurological condition caused by a degeneration of dopamine-producing cells characterized by motor and non-motor symptoms. The major mechanisms of the antiepileptic actions of ZNS are inhibition of voltage-gated Na+ channel, T-type voltage-sensitive Ca2+ channel, Ca2+-induced Ca2+ releasing system, and neuronal depolarization-induced glutamate release; and enhancement of release of inhibitory neurotransmitters; however, the detailed mechanism of antiparkinsonian effects of ZNS remains to be clarified. We aimed to investigate to the effect of ZNS on the oxidative stress, cell viability, Ca2+ signaling, and caspase activity that induced by the MPP+ model of Parkinson's in neuronal PC12 cells. Neuronal PC12 cells were divided into four groups namely, control, ZNS, MPP+, and ZNS+MPP+ groups. The dose and duration of ZNS and MPP+ were determined according to cell viability (MTT) analysis which used to assess the cell viability. The cells in ZNS, MPP+, and ZNS+MPP+ groups were incubated for 5 h with 100 mu M ZNS, 10 h with 100 mu M MPP+, and 10 h with ZNS and MPP+, respectively. Lipid peroxidation and cytosolic free Ca2+ concentrations were higher in the MPP+ group than in control although their levels were lower in ZNS and the ZNS+MPP+ groups than in control. Reduced glutathione and glutathione peroxidase values were lower in the MPP+ group although they were higher in the ZNS and the ZNS+MPP+ groups than in control. Caspase-3 activity was lower in the ZNS group than in the MPP+ group. In conclusion, ZNS induced modulator effects on the oxidative stress, intracellular Ca2+, and the caspase-3 values in an experimental model of Parkinson disease. |
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