Abstract:
:Oxidative stress-induced neuronal cell death requires opening of the mitochondrial permeability transition pore. P53 mitochondrial translocation and association with Cyclophilin D (Cyp-D) is required for the pore opening. Here we tested this signaling axis in oxygen glucose deprivation (OGD)/re-oxygenation-induced in vitro neuronal death. Using mitochondrion immunoprecipitation, we found that p53 translocated to mitochondrion and associated with Cyp-D in SH-SY5Y cells exposed to (OGD)/re-oxygenation. Disruption of this complex by Cyp-D inhibitor Cyclosporine A (CsA), or by Cyp-D or p53 deficiency, significantly inhibited OGD/re-oxygenation-induced apoptosis-independent cell death. Conversely, over-expression of Cyp-D in SH-SY5Y cells caused spontaneous cell death, and these cells were more vulnerable to OGD/re-oxygenation. Finally, CsA or Cyp-D RNAi suppressed OGD/re-oxygenation-induced neuronal cell death in primary cultures. Together, our study suggests that OGD/re-oxygenation-induced in vitro cell death involves a mitochondrial Cyp-D/p53 signaling axis.
journal_name
Neurochem Resjournal_title
Neurochemical researchauthors
Zhao LP,Ji C,Lu PH,Li C,Xu B,Gao Hdoi
10.1007/s11064-013-0968-5subject
Has Abstractpub_date
2013-04-01 00:00:00pages
705-13issue
4eissn
0364-3190issn
1573-6903journal_volume
38pub_type
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