Synaptic Integration of Adult-Born Hippocampal Neurons Is Locally Controlled by Astrocytes

Sultan, S. and Li, L. and Moss, J. and Petrelli, F. and Casse, F. and Gebara, E. and Lopatar, J. and Pfrieger, F. W. and Bezzi, P. and Bischofberger, J. and Toni, N.. (2015) Synaptic Integration of Adult-Born Hippocampal Neurons Is Locally Controlled by Astrocytes. Neuron, 88 (5). pp. 957-972.

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Official URL: https://edoc.unibas.ch/61421/

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Adult neurogenesis is regulated by the neurogenic niche, through mechanisms that remain poorly defined. Here, we investigated whether niche-constituting astrocytes influence the maturation of adult-born hippocampal neurons using two independent transgenic approaches to block vesicular release from astrocytes. In these models, adult-born neurons but not mature neurons showed reduced glutamatergic synaptic input and dendritic spine density that was accompanied with lower functional integration and cell survival. By taking advantage of the mosaic expression of transgenes in astrocytes, we found that spine density was reduced exclusively in segments intersecting blocked astrocytes, revealing an extrinsic, local control of spine formation. Defects in NMDA receptor (NMDAR)-mediated synaptic transmission and dendrite maturation were partially restored by exogenous D-serine, whose extracellular level was decreased in transgenic models. Together, these results reveal a critical role for adult astrocytes in local dendritic spine maturation, which is necessary for the NMDAR-dependent functional integration of newborn neurons.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Division of Physiology > Cellular Neurophysiology (Bischofberger)
UniBasel Contributors:Bischofberger, Josef
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Cell Press; Elsevier
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Oct 2018 18:40
Deposited On:16 Oct 2018 16:50

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