Cited by 140Neuroscience and Neuropharmacology ResearchNeurogenesis and neuroplasticity mechanismsProteoglycans and glycosaminoglycans research

Primary Hippocampal Neurons, Which Lack Four Crucial Extracellular Matrix Molecules, Display Abnormalities of Synaptic Structure and Function and Severe Deficits in Perineuronal Net Formation

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Geissler, Maren, Gottschling, Christine, Aguado, Ainhara, Rauch, Uwe, Wetzel, Christian H., Hatt, Hanns, Faissner, Andreas·2013·The Journal of Neuroscience

Abstract

The extracellular matrix (ECM) of the brain plays crucial roles during the development, maturation, and regeneration of the CNS. In a subpopulation of neurons, the ECM condenses to superstructures called perineuronal nets (PNNs) that surround synapses. Camillo Golgi described PNNs a century ago, yet their biological functions remain elusive. Here, we studied a mouse mutant that lacks four ECM components highly enriched in the developing brain: the glycoproteins tenascin-C and tenascin-R and the chondroitin sulfate proteoglycans brevican and neurocan. Primary embryonic hippocampal neurons and astrocytes were cultivated using a cell insert system that allows for co-culture of distinct cell populations in the absence of direct membrane contacts. The wild-type and knock-out cells were combined in the four possible permutations. Using this approach, neurons cultivated in the presence of mutant astrocytes displayed a transient increase of synapses after 2 weeks. However, after a period of 3 weeks or longer, synapse formation and stabilization were compromised when either neuron or astrocyte cell populations or both were of mutant origin. The development of PNN structures was observed, but their size was substantially reduced on knock-out neurons. The synaptic activity of both wild-type and knock-out neurons was monitored using whole-cell patch clamping. The salient observation was a reduced frequency of IPSCs and EPSCs, whereas the amplitudes were not modified. Remarkably, the knock-out neuron phenotypes could not be rescued by wild-type astrocytes. We conclude that the elimination of four ECM genes compromises neuronal function.

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Crossref · 10.1523/jneurosci.3275-12.2013

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Authors
Geissler, M., Gottschling, C., Aguado, A., Rauch, U., Wetzel, C. H., Hatt, H., & Faissner, A.
Affiliations
  • Ruhr University Bochum (DE)
  • Lund University (SE)
  • University of Regensburg (DE)
Venue
The Journal of Neuroscience
Published
2013-05-01
Volume
33
Issue
18
Pages
7742-7755
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2012448906
Cited by
140
References
86
Citations by year
2026: 5 · 2025: 4 · 2024: 7 · 2023: 13 · 2022: 12 · 2021: 15 · 2020: 18 · 2019: 10 · 2018: 11 · 2017: 16 · 2016: 7 · 2015: 8 · 2014: 11 · 2013: 3
FWCI
4.74
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion, other-oa)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Proteoglycans and glycosaminoglycans research
Keywords
perineuronal nets, extracellular matrix, hippocampal neurons, astrocytes, tenascin-C, tenascin-R, brevican, neurocan, chondroitin sulfate proteoglycans, synaptogenesis, synapse stabilization, inhibitory postsynaptic currents, excitatory postsynaptic currents, co-culture, embryonic neurons
MeSH terms
Animals, Astrocytes, Cell Count, Cells, Cultured, Embryo, Mammalian, Female, Hippocampus, Male, Mice, Inbred C57BL, Nerve Net, Neurons, Synapses, Extracellular Matrix Proteins, Mice, Knockout, Gene Expression Regulation, Developmental, Coculture Techniques, Tenascin, Excitatory Postsynaptic Potentials, Mice, Inhibitory Postsynaptic Potentials, Neurocan, Brevican

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