Cited by 59Neuroscience and Neuropharmacology ResearchProteoglycans and glycosaminoglycans researchNeurogenesis and neuroplasticity mechanisms

Molecular heterogeneity of aggrecan-based perineuronal nets around five subclasses of parvalbumin-expressing neurons in the mouse hippocampus.

Yamada, Jun, Jinno, Shozo·2017·Journal of Comparative Neurology

Abstract

Subsets of GABAergic neurons are surrounded by perineuronal nets (PNNs), which play a critical role in the regulation of neural plasticity and neuroprotection. Although the plant lectin Wisteria floribunda agglutinin (WFA) has been commonly used to label PNNs, WFA only detects N-acetyl-d-galactosamine on aggrecan, a member of the lectican family. In this study, we used WFA and the antibody against the core protein of aggrecan (ACAN) to investigate the molecular heterogeneity of aggrecan-based PNNs around five subclasses of parvalbumin-expressing (PV+) γ-aminobutyric acid (GABA)ergic neurons in the CA1 and CA3 regions of the mouse hippocampus. The vast majority of ACAN+ PNNs were colocalized with WFA in the stratum pyramidale, whereas a substantial population of ACAN+ PNNs lacked WFA labeling in the stratum oriens. We then defined the subclasses of PV+ neurons based on their cellular locations, molecular expression, and septal projection. Like the WFA+ PNNs, ACAN+ PNNs surrounded PV+ basket cells and bistratified cells but not axo-axonic cells. Unlike the WFA+ PNNs, ACAN+ PNNs frequently surrounded PV+ oriens-lacunosum moleculare cells and hippocampo-septal cells. Interestingly, the relative densities of GABAergic synapses were higher around PV+ neurons with ACAN+ PNNs than around those without ACAN+ PNNs. Degradation of WFA+ PNNs by chondroitinase ABC did not affect the GABAergic synaptic densities around PV+ neurons. Our findings suggest that the molecular composition of aggrecan-based PNNs around PV+ neurons may differ in a subclass-specific manner, and also might help determine the functional involvement of PNNs in the regulation of GABAergic synapses around PV+ neurons in the hippocampus. J. Comp. Neurol. 525:1234-1249, 2017. © 2016 Wiley Periodicals, Inc.

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Crossref · 10.1002/cne.24132

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Authors
Yamada, J., & Jinno, S.
Affiliations
Kyushu University (JP)
Corresponding author
Jinno, Shozo
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2016-11-21
Volume
525
Issue
5
Pages
1234-1249
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2531096100
Cited by
59
References
72
Citations by year
2026: 3 · 2025: 5 · 2024: 2 · 2023: 1 · 2022: 10 · 2021: 7 · 2020: 6 · 2019: 4 · 2018: 12 · 2017: 9
FWCI
4.67
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Fuji Foundation for Protein Research
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Proteoglycans and glycosaminoglycans research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
perineuronal nets, aggrecan, parvalbumin neurons, GABAergic neurons, hippocampus, basket cells, axo-axonic cells, Wisteria floribunda agglutinin, GABAergic synapses, chondroitinase ABC, molecular heterogeneity, CA1, CA3
MeSH terms
Animals, Extracellular Matrix, Hippocampus, Immunohistochemistry, Male, Mice, Inbred C57BL, Parvalbumins, Mice, Aggrecans, GABAergic Neurons

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