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- W1839779605 abstract "NO is a putative neurotransmitter and neuromodulator in the brain. NO is not functioning as a direct neurotoxin. NO with the superoxide radical product peroxynitrite (ONOO-) is much more cytotoxic under tissue impairment conditions. Caspase-3, a potent effector of apoptosis that is triggered via several different signaling pathways, may play a very important role in neuronal cell death caused by various brain injuries. The relationship between mouse caspase-3 and peroxynitrite remains unclear. In the present study, we examined the in vivo expression of 3-nitrotyrosine (a metabolite of peroxinitrite) and caspase-3 after cerebral ischemia produced in a global ischemia model using mice (i.e., a cardiac arrest model). 3-nitrotyrosine immunoreactivity was detected in neuronal cells in the hippocampal dentate nucleus, and cortical regions starting at 12 hrs after ischemia. In particular, numerous neuronal cells were highly immunoreactive for 3-nitrotyrosine in the cortical regions. In hippocampal CA1 pyramidal neurons, 3-nitrotyrosine immunoreactivity was detected from 24 hrs. Caspase-3 immunopositive cells were observed in approximately the same area in which the positive reaction to the anti-nitrotyrosine antibody was observed. These results provide direct evidence for the induction of 3-nitrotyrosine and caspase-3 expression in vivo in an ischemia model using mice. The present findings suggest that peroxynitrite generated by cerebral ischemia/ reperfusion was strongly cytotoxic and induced neuronal cell death (apoptosis) mediated by caspase-3." @default.
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- W1839779605 date "2003-01-01" @default.
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- W1839779605 title "Peroxynitrite and caspase-3 expression after ischemia/reperfusion in mouse cardiac arrest model" @default.
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- W1839779605 doi "https://doi.org/10.1007/978-3-7091-0651-8_20" @default.
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