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Zinc and Copper Effects on Stability of Tubulin and Actin Networks in Dendrites and Spines of Hippocampal Neurons

hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorPERRIN, Laura
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorROUDEAU, Stéphane
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorCARMONA, Asuncion
dc.contributor.authorDOMART, Florelle
dc.contributor.authorPETERSEN, Jennifer D.
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
hal.structure.identifier[GIN] Grenoble Institut des Neurosciences [GIN]
dc.contributor.authorBOHIC, Sylvain
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorYANG, Yang
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorCLOETENS, Peter
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorORTEGA, Richard
dc.date.issued2017
dc.description.abstractEnZinc and copper ions can modulate the activity of glutamate receptors. However, labile zinc and copper ions likely represent only the tip of the iceberg and other neuronal functions are suspected for these metals in their bound state. We performed synchrotron X-ray fluorescence imaging with 30 nm resolution to image total biometals in dendrites and spines from hippocampal neurons. We found that zinc is distributed all along the dendrites while copper is mainly pinpointed within the spines. In spines, zinc content is higher within the spine head while copper is higher within the spine neck. Such specific distributions suggested metal interactions with cytoskeleton proteins. Zinc supplementation induced the increase of β-tubulin content in dendrites. Copper supplementation impaired the β-tubulin and F-actin networks. Copper chelation resulted in the decrease of F-actin content in dendrites, drastically reducing the number of F-actin protrusions. These results indicate that zinc is involved in microtubule stability whereas copper is essential for actin-dependent stability of dendritic spines, although copper excess can impair the dendritic cytoskeleton.
dc.language.isoen
dc.title.enZinc and Copper Effects on Stability of Tubulin and Actin Networks in Dendrites and Spines of Hippocampal Neurons
dc.typeArticle de revue
dc.identifier.doi10.1021/acschemneuro.6b00452
dc.subject.halPhysique [physics]
bordeaux.journalACS Chem.Neurosci.
bordeaux.page1490-1499
bordeaux.volume8
bordeaux.issue7
bordeaux.peerReviewedoui
hal.identifierhal-01719686
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01719686v1
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