Please use this identifier to cite or link to this item:
https://doi.org/10.1074/jbc.M111.268409
DC Field | Value | |
---|---|---|
dc.title | Enhanced autophagy from chronic toxicity of iron and mutant A53T α-synuclein: Implications for neuronal cell death in parkinson disease | |
dc.contributor.author | Chew, K.C.M. | |
dc.contributor.author | Ang, E.-T. | |
dc.contributor.author | Tai, Y.K. | |
dc.contributor.author | Tsang, F. | |
dc.contributor.author | Lo, S.Q. | |
dc.contributor.author | Ong, E. | |
dc.contributor.author | Ong, W.-Y. | |
dc.contributor.author | Shen, H.-M. | |
dc.contributor.author | Lim, K.-L. | |
dc.contributor.author | Dawson, V.L. | |
dc.contributor.author | Dawson, T.M. | |
dc.contributor.author | Soong, T.W. | |
dc.date.accessioned | 2014-11-25T09:45:09Z | |
dc.date.available | 2014-11-25T09:45:09Z | |
dc.date.issued | 2011-09-23 | |
dc.identifier.citation | Chew, K.C.M., Ang, E.-T., Tai, Y.K., Tsang, F., Lo, S.Q., Ong, E., Ong, W.-Y., Shen, H.-M., Lim, K.-L., Dawson, V.L., Dawson, T.M., Soong, T.W. (2011-09-23). Enhanced autophagy from chronic toxicity of iron and mutant A53T α-synuclein: Implications for neuronal cell death in parkinson disease. Journal of Biological Chemistry 286 (38) : 33380-33389. ScholarBank@NUS Repository. https://doi.org/10.1074/jbc.M111.268409 | |
dc.identifier.issn | 00219258 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/108364 | |
dc.description.abstract | Parkinson disease (PD), a prevalent neurodegenerative motor disorder, is characterized by the rather selective loss of dopaminergic neurons and the presence of α-synuclein-enriched Lewy body inclusions in the substantia nigra of the midbrain. Although the etiology of PD remains incompletely understood, emerging evidence suggests that dysregulated iron homeostasis may be involved. Notably, nigral dopaminergic neurons are enriched in iron, the uptake of which is facilitated by the divalent metal ion transporter DMT1. To clarify the role of iron in PD, we generated SH-SY5Y cells stably expressing DMT1 either singly or in combination with wild type or mutant α-synuclein. We found that DMT1 overexpression dramatically enhances Fe 2+ uptake, which concomitantly promotes cell death. This Fe 2+-mediated toxicity is aggravated by the presence of mutant α-synuclein expression, resulting in increased oxidative stress and DNA damage. Curiously, Fe 2+-mediated cell death does not appear to involve apoptosis. Instead, the phenomenon seems to occur as a result of excessive autophagic activity. Accordingly, pharmacological inhibition of autophagy reverses cell death mediated by Fe 2+ overloading. Taken together, our results suggest a role for iron in PD pathogenesis and provide a mechanism underlying Fe 2+-mediated cell death. © 2011 by The American Society for Biochemistry and Molecular Biology, Inc. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1074/jbc.M111.268409 | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | EPIDEMIOLOGY & PUBLIC HEALTH | |
dc.contributor.department | PHYSIOLOGY | |
dc.description.doi | 10.1074/jbc.M111.268409 | |
dc.description.sourcetitle | Journal of Biological Chemistry | |
dc.description.volume | 286 | |
dc.description.issue | 38 | |
dc.description.page | 33380-33389 | |
dc.description.coden | JBCHA | |
dc.identifier.isiut | 000294968800056 | |
Appears in Collections: | Staff Publications Elements |
Show simple item record
Files in This Item:
File | Description | Size | Format | Access Settings | Version | |
---|---|---|---|---|---|---|
jbc.M111.268409.pdf | 3.53 MB | Adobe PDF | OPEN | Published | View/Download |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.