Cited by 98Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

Activated forms of astrocytes with higher GLT-1 expression are associated with cognitive normal subjects with Alzheimer pathology in human brain

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Kobayashi, Eiji, Nakano, Masako, Kubota, Kenta, Himuro, Nobuaki, Mizoguchi, Shougo, Chikenji, Takako, Otani, Miho, Mizue, Yuka +2 more·2018·Scientific Reports

Abstract

Although the cognitive impairment in Alzheimer’s disease (AD) is believed to be caused by amyloid-β (Aβ) plaques and neurofibrillary tangles (NFTs), several postmortem studies have reported cognitive normal subjects with AD brain pathology. As the mechanism underlying these discrepancies has not been clarified, we focused the neuroprotective role of astrocytes. After examining 47 donated brains, we classified brains into 3 groups, no AD pathology with no dementia (N-N), AD pathology with no dementia (AD-N), and AD pathology with dementia (AD-D), which represented 41%, 21%, and 38% of brains, respectively. No differences were found in the accumulation of Aβ plaques or NFTs in the entorhinal cortex (EC) between AD-N and AD-D. Number of neurons and synaptic density were increased in AD-N compared to those in AD-D. The astrocytes in AD-N possessed longer or thicker processes, while those in AD-D possessed shorter or thinner processes in layer I/II of the EC. Astrocytes in all layers of the EC in AD-N showed enhanced GLT-1 expression in comparison to those in AD-D. Therefore these activated forms of astrocytes with increased GLT-1 expression may exert beneficial roles in preserving cognitive function, even in the presence of Aβ and NFTs.

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Authors
Kobayashi, E., Nakano, M., Kubota, K., Himuro, N., Mizoguchi, S., Chikenji, T., Otani, M., Mizue, Y., Nagaishi, K., & Fujimiya, M.
Affiliations
Sapporo Medical University (JP)
Corresponding author
Fujimiya, Mineko
Venue
Scientific Reports
Published
2018-01-26
Volume
8
Issue
1
Pages
1712-1712
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2792811901
Cited by
98
References
63
Citations by year
2026: 3 · 2025: 3 · 2024: 14 · 2023: 9 · 2022: 19 · 2021: 20 · 2020: 18 · 2019: 8 · 2018: 3
FWCI
8.42
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
Japan Society for the Promotion of Science (16K19317)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
Alzheimer's disease, astrocytes, GLT-1, glutamate transporters, astrocyte activation, entorhinal cortex, amyloid plaques, neurofibrillary tangles, dementia, synaptic density, neuroprotection, astrocyte morphology
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Astrocytes, Brain, Cognition Disorders, Female, Humans, Male, Amyloid beta-Peptides, Neurofibrillary Tangles, Excitatory Amino Acid Transporter 2, Glutamate Plasma Membrane Transport Proteins

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