Oxidative stress, mitochondrial permeability transition and activation of caspases in calcium ionophore A23187-induced death of cultured striatal neurons

被引:84
作者
Petersén, Å
Castilho, RF
Hansson, O
Wieloch, T
Brundin, P
机构
[1] Dept Physiol Sci, Wallenberg Neurosci Ctr, Sect Neuronal Survival, S-22362 Lund, Sweden
[2] Univ Lund Hosp, Wallenberg Neurosci Ctr, Expt Brain Res Lab, S-22185 Lund, Sweden
关键词
apoptosis; calcium; cell death; Huntington's disease; mitochondria; striatal neuron;
D O I
10.1016/S0006-8993(99)02320-3
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Disruption of intracellular calcium homeostasis is thought to play a role in neurodegenerative disorders such as Huntington's disease (HD). To study different aspects of putative pathogenic mechanisms in HD, we aimed to establish an in vitro model of calcium-induced toxicity in striatal neurons. The calcium ionophore A23187 induced a concentration- and time-dependent cell death in cultures of embryonic striatal neurons, causing both apoptosis and necrosis. Cell death was significantly reduced by the cell-permeant antioxidant manganese(III)tetrakis(4-benzoic acid) porphyrin (MnTBAP). Cyclosporin A and its analogue N-MeVal-4-cyclosporin also reduced the incidence of cell death, suggesting the participation of mitochondrial permeability transition in this process. Furthermore, addition of either of two types of caspase inhibitors, Ac-YVAD-CHO (acetyl-Tyr-Val-Ala-Asp-aldehyde) and Ac-DEVD-CHO (acetyl-Asp-Glu-Val-Asp-aldehyde), to the striatal cells blocked A23187-induced striatal cell death in a concentration-dependent manner. These results suggest that oxidative stress, opening of the mitochondrial permeability transition pore and activation of caspases,es are important steps in A23187-induced cell death. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:20 / 29
页数:10
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