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Valosin-containing protein is a key mediator between autophagic cell death and apoptosis in adult hippocampal neural stem cells following insulin withdrawal

Title
Valosin-containing protein is a key mediator between autophagic cell death and apoptosis in adult hippocampal neural stem cells following insulin withdrawal
Authors
Yeo, BK[Yeo, Bo Kyoung]Hong, CJ[Hong, Caroline Jeeyeon]Chung, KM[Chung, Kyung Min]Woo, H[Woo, Hanwoong]Kim, K[Kim, Kyungchan]Jung, S[Jung, Seonghee]Kim, EK[Kim, Eun-Kyoung]Yu, SW[Yu, Seong-Woon]
DGIST Authors
Yeo, BK[Yeo, Bo Kyoung]; Hong, CJ[Hong, Caroline Jeeyeon]; Chung, KM[Chung, Kyung Min]; Woo, H[Woo, Hanwoong]; Kim, K[Kim, Kyungchan]; Jung, S[Jung, Seonghee]; Kim, EK[Kim, Eun-Kyoung]Yu, SW[Yu, Seong-Woon]
Issue Date
2016-03-22
Citation
Molecular Brain, 9
Type
Article
Article Type
Article
Keywords
AdultAdult Neural Stem CellsAnimal CellAnimal TissueApoptosisAutophagic Cell DeathAutophagosomeAutophagyBrain Nerve CellControlled StudyDown-RegulationDrug WithdrawalEmbryoGene InactivationHippocampusInsulinInsulin WithdrawalMembrane TransportNeural Stem CellNon-HumanPriority JournalProtein DegradationProtein ExpressionProtein TransportRatRegulatory MechanismSignal TransductionValosin-Containing Protein
ISSN
1756-6606
Abstract
Background: Programmed cell death (PCD) plays essential roles in the regulation of survival and function of neural stem cells (NSCs). Abnormal regulation of this process is associated with developmental and degenerative neuronal disorders. However, the mechanisms underlying the PCD of NSCs remain largely unknown. Understanding the mechanisms of PCD in NSCs is crucial for exploring therapeutic strategies for the treatment of neurodegenerative diseases. Result: We have previously reported that adult rat hippocampal neural stem (HCN) cells undergo autophagic cell death (ACD) following insulin withdrawal without apoptotic signs despite their normal apoptotic capabilities. It is unknown how interconnection between ACD and apoptosis is mediated in HCN cells. Valosin-containing protein (VCP) is known to be essential for autophagosome maturation in mammalian cells. VCP is abundantly expressed in HCN cells compared to hippocampal tissue and neurons. Pharmacological and genetic inhibition of VCP at basal state in the presence of insulin modestly impaired autophagic flux, consistent with its known role in autophagosome maturation. Of note, VCP inaction in insulin-deprived HCN cells significantly decreased ACD and down-regulated autophagy initiation signals with robust induction of apoptosis. Overall autophagy level was also substantially reduced, suggesting the novel roles of VCP at initial step of autophagy. Conclusion: Taken together, these data demonstrate that VCP may play an essential role in the initiation of autophagy and mediation of crosstalk between ACD and apoptosis in HCN cells when autophagy level is high upon insulin withdrawal. This is the first report on the role of VCP in regulation of NSC cell death. Elucidating the mechanism by which VCP regulates the crosstalk of ACD and apoptosis will contribute to understanding the molecular mechanism of PCD in NSCs. © 2016 Yeo et al.
URI
http://hdl.handle.net/20.500.11750/2289
DOI
10.1186/s13041-016-0212-8
Publisher
BioMed Central Ltd.
Related Researcher
Files:
There are no files associated with this item.
Collection:
Core Protein Resources Center1. Journal Articles
Brain and Cognitive SciencesLab of Neuro-Metabolism & Neurometabolomic Research Center1. Journal Articles


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