Cited by 284Neurogenesis and neuroplasticity mechanismsNeuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration Mechanisms

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

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Sultan, Sébastien, Li, Liyi, Moss, Jonathan, Petrelli, Francesco, Cassé, Frédéric, Gebara, Elias, Lopatar, Jan, Pfrieger, Frank W. +3 more·2015·Neuron

Abstract

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.

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Crossref · 10.1016/j.neuron.2015.10.037

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  • Astrocyte-released D-serine participates in the integration of adult-born granule neurons into the hippocampal circuitry.

    “Astrocyte-released D-serine participates also in another form of synaptic plasticity, namely the integration of adult-born granule neurons into the hippocampal circuitry 33”
  • Several other studies have not observed leakage of dnSNARE expression in neurons.

    “several other studies have not observed this leakage 32, 33, 89”
  • Blockade of vesicular release from astrocytes impairs new neuron survival and dendritic maturation by reducing dendritic branching and numbers of dendritic spines on new neurons.

    “Blockade of vesicular release from astrocytes has been shown to impair new neuron survival and dendritic maturation by reducing dendritic branching and numbers of dendritic spines on new neurons (Sultan et al., 2015), suggesting that astrocytes are important regulators of adult neurogenesis at many stages in the process.”

    From Adult neurogenesis, glia, and the extracellular matrix (2019) · cites this paper as Sultan et al., 2015

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  1. Kempermann, G., and Gage, F.H. (1999). Experience-dependent regulation of adult hippocampal neurogenesis: effects of long-term stimulation and stimulus withdrawal. Hippocampus 9 , 321-332. http://refhub.elsevier.com/S0896-6273(1500931-9/sref28)

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Authors
Sultan, S., Li, L., Moss, J., Petrelli, F., Cassé, F., Gebara, E., Lopatar, J., Pfrieger, F. W., Bezzi, P., Bischofberger, J., & Toni, N.
Affiliations
  • University of Lausanne (CH)
  • University of Basel (CH)
  • Centre National de la Recherche Scientifique (FR)
Corresponding author
Toni, Nicolas
Venue
Neuron
Publisher
Elsevier BV
Published
2015-12
Volume
88
Issue
5
Pages
957-972
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2179495678
Cited by
284
References
61
Citations by year
2026: 9 · 2025: 28 · 2024: 19 · 2023: 25 · 2022: 19 · 2021: 32 · 2020: 39 · 2019: 24 · 2018: 21 · 2017: 40 · 2016: 22 · 2015: 3
FWCI
11.59
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • SERVAL (Université de Lausanne) (acceptedVersion, other-oa)
  • IRIS Research product catalog (Sapienza University of Rome) (submittedVersion, other-oa)
  • HAL (submittedVersion, other-oa)
  • IRIS (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • Agence Nationale de la Recherche
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (153276, PPOOA-119026/1, 119026)
  • Université de Bordeaux
  • Fondation Leenaards
  • Université de Lausanne
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
adult neurogenesis, astrocytes, hippocampal neurons, synaptic integration, dendritic spine maturation, neurogenic niche, glutamatergic synaptic input, NMDA receptor, D-serine, vesicle release, cell survival
MeSH terms
Animals, Astrocytes, Glial Fibrillary Acidic Protein, Hippocampus, Membrane Potentials, Mice, Transgenic, Synaptic Transmission, Neurons, Phosphopyruvate Hydratase, Serine, Sodium Chloride, Synapses, Tamoxifen, Receptors, N-Methyl-D-Aspartate, Excitatory Postsynaptic Potentials, Excitatory Amino Acid Transporter 1, Clostridium botulinum type B, Dendritic Spines, SNARE Proteins, Mice, Neurogenesis

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