Cited by 76Neuroscience and Neuropharmacology ResearchNeural dynamics and brain functionNeurogenesis and neuroplasticity mechanisms

Age-dependent and region-specific alteration of parvalbumin neurons and perineuronal nets in the mouse cerebral cortex

Ueno, Hiroshi, Takao, Keizo, Suemitsu, Shunsuke, Murakami, Shinji, Kitamura, Naoya, Wani, Kenta, Okamoto, Motoi, Aoki, Shozo +1 more·2018·Neurochemistry International

Abstract

Cognitive function declines with age. Such function depends on γ-oscillation in the frontal cortex. Pyramidal neurons, and the parvalbumin-expressing interneurons (PV neurons) that control them, are important for the generation of γ-oscillation. The mechanism by which cognitive function declines is unclear. Perineuronal nets (PNNs) mainly surround the soma and proximal dendrites and axon segments of PV neurons in the cerebral cortex. Previous evidence indicates that PNNs inhibit neural plasticity. If this is true, an increase in the number of neurons surrounded by PNNs or in the thickness or density of the PNNs around neurons could decrease plasticity in the cortex. To determine if an aging-related change in cortical PNNs occurs, we examined the influence of aging on PV neurons and whether Wisteria floribunda agglutinin-positive PNNs differ depending on the cortical area. The results showed that the number of PV neurons/mm 2 did not change in many areas of the cortex as mice aged. In contrast, the number of neurons in the sensory cortex surrounded by PNNs increased as mice aged. Thus, with age, PNN density increases in some cortical areas but not in others. In addition, the expression level of PV protein in PV neurons decreased with aging in the whole cortex. We suggest that decreased expression of PV protein impairs fast spiking in PV neurons. We propose that PNNs surround more neurons as age increases. This aging-related increase in PNNs decreases plasticity in the cerebral cortex and reduces cognitive function. The first step in investigating this proposal would be to determine if PNN density increases with age.

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Crossref · 10.1016/j.neuint.2017.11.001

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  • The appearance of PNNs coincides with the maturation of PV1 cells and the decrease of plasticity levels in neocortical regions, hippocampus, and amygdala.

    “Although critical periods are specific for different systems and have a different time lines, the appearance of PNNs coincides with the maturation of PV1 cells and the decrease of plasticity levels, not only in neocortical regions (Pizzorusso et al., 2002;Ueno et al., 2018), but also in the hippocampus (Bukalo et al., 2001) and the amygdala (Gogolla et al., 2009).”

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Authors
Ueno, H., Takao, K., Suemitsu, S., Murakami, S., Kitamura, N., Wani, K., Okamoto, M., Aoki, S., & Ishihara, T.
Affiliations
  • Okayama University (JP)
  • University of Toyama (JP)
  • Kawasaki Medical School (JP)
Corresponding author
Ueno, Hiroshi
Venue
Neurochemistry International
Publisher
Elsevier BV
Published
2018-01
Volume
112
Pages
59-70
ISSN
0197-0186 (ISSN-L)
OpenAlex
W2767601667
Cited by
72
References
63
Citations by year
2026: 10 · 2025: 11 · 2024: 9 · 2023: 6 · 2022: 7 · 2021: 10 · 2020: 9 · 2019: 7 · 2018: 3
FWCI
2.49
Type
journal article
Language
en
Open access
closed
Locations
  • Neurochemistry International (publishedVersion)
  • PubMed (publishedVersion)
Funders
Ryobi Teien Memory Foundation
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
parvalbumin neurons, perineuronal nets, brain aging, gamma oscillations, fast spiking, cortical interneurons, neuroplasticity, cognitive decline, sensory cortex, Wisteria floribunda agglutinin, mouse cortex
MeSH terms
Age Factors, Aging, Animals, Cerebral Cortex, Male, Mice, Inbred C57BL, Nerve Net, Neurons, Parvalbumins, Peripheral Nerves, Mice

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