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dc.contributor.authorCameron, Ryan T
dc.contributor.authorQuinn, Steven D
dc.contributor.authorCairns, Lynn S
dc.contributor.authorMacLeod, Ruth
dc.contributor.authorSamuel, Ifor D W
dc.contributor.authorSmith, Brian O
dc.contributor.authorPenedo, Carlos
dc.contributor.authorBaillie, George S
dc.identifier.citationCameron , R T , Quinn , S D , Cairns , L S , MacLeod , R , Samuel , I D W , Smith , B O , Penedo , C & Baillie , G S 2014 , ' The phosphorylation of Hsp20 enhances its association with amyloid-β to increase protection against neuronal cell death ' , Molecular and Cellular Neuroscience , vol. 61 , pp. 46-55 .
dc.identifier.otherPURE: 120701634
dc.identifier.otherPURE UUID: 6b7df00b-0347-42d3-9834-fd2741babfc7
dc.identifier.otherPubMed: 24859569
dc.identifier.otherPubMed: 24859569
dc.identifier.otherScopus: 84902244714
dc.identifier.otherWOS: 000340690400005
dc.identifier.otherORCID: /0000-0002-5807-5385/work/74872774
dc.descriptionThis project was funded by a doctoral training studentship from the Biotechnology and Biological Sciences Research Council Doctoral Training Programme in Biochemistry and Molecular Biology at the University of Glasgow [grant number BB/F016735/1].en
dc.description.abstractUp-regulation of Hsp20 protein levels in response to amyloid fibril formation is considered a key protective response against the onset of Alzheimer's disease (AD). Indeed, the physical interaction between Hsp20 and Aβ is known to prevent Aβ oligomerisation and protects neuronal cells from Aβ mediated toxicity, however, details of the molecular mechanism and regulatory cell signalling events behind this process have remained elusive. Using both conventional MTT end-point assays and novel real time measurement of cell impedance, we show that Hsp20 protects human neuroblastoma SH-SY5Y cells from the neurotoxic effects of Aβ. In an attempt to provide a mechanism for the neuroprotection afforded by Hsp20, we used peptide array, co-immunoprecipitation analysis and NMR techniques to map the interaction between Hsp20 and Aβ and report a binding mode where Hsp20 binds adjacent to the oligomerisation domain of Aβ, preventing aggregation. The Hsp20/Aβ interaction is enhanced by Hsp20 phosphorylation, which serves to increase association with low molecular weight Aβ species and decrease the effective concentration of Hsp20 required to disrupt the formation of amyloid oligomers. Finally, using a novel fluorescent assay for the real time evaluation of morphology-specific Aβ aggregation, we show that phospho-dependency of this effect is more pronounced for fibrils than for globular Aβ forms and that 25mers corresponding to the Hsp20 N-terminal can be used as Aβ aggregate inhibitors. Our report is the first to provide a molecular model for the Hsp20/Aβ complex and the first to suggest that modulation of the cAMP/cGMP pathways could be a novel route to enhance Hsp20-mediated attenuation of Aβ fibril neurotoxicity.
dc.relation.ispartofMolecular and Cellular Neuroscienceen
dc.rights© 2014 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (
dc.subjectAβ oligomerisationen
dc.subjectPeptide arrayen
dc.subjectQH301 Biologyen
dc.subjectSDG 3 - Good Health and Well-beingen
dc.titleThe phosphorylation of Hsp20 enhances its association with amyloid-β to increase protection against neuronal cell deathen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.contributor.institutionUniversity of St Andrews. Biomedical Sciences Research Complexen
dc.description.statusPeer revieweden

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