Disruption of oligodendrocyte progenitor cells is an early sign of pathology in the triple transgenic mouse model of Alzheimer's disease
Open accessAbstract
There is increasing evidence that myelin disruption is related to cognitive decline in Alzheimer's disease (AD). In the CNS, myelin is produced by oligodendrocytes, which are generated throughout life by adult oligodendrocyte progenitor cells (OPCs), also known as NG2-glia. To address whether alterations in myelination are related to age-dependent changes in OPCs, we analyzed NG2 and myelin basic protein (MBP) immunolabelling in the hippocampus of 3×Tg-AD mice at 6 and 24 months of age, compared with non-Tg age-matched controls. There was an age-related decrease in MBP immunostaining and OPC density, together with a decline in the number of OPC sister cells, a measure of OPC replication. Notably, the loss of myelin and OPC sister cells occurred earlier at 6 months in 3xTg-AD, suggesting accelerated aging, although there was not a concomitant decline in OPC numbers at this age, suggesting the observed changes in myelin were not a consequence of replicative exhaustion, but possibly of OPC disruption or senescence. In line with this, a key finding is that compared to age-match controls, OPC displayed marked morphological atrophy at 6 months in 3xTg-AD followed by morphological hypertrophy at 24 months, as deduced from significant changes in total cell surface area, total cell volume, somata volume and branching of main processes. Moreover, we show that hypertrophic OPCs surround and infiltrate amyloid-β (Aβ) plaques, a key pathological hallmark of AD. The results indicate that OPCs undergo complex age-related remodeling in the hippocampus of the 3xTg-AD mouse model. We conclude that OPC disruption is an early pathological sign in AD and is a potential factor in accelerated myelin loss and cognitive decline.
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The early epoch features losses of oligodendrocytes and a dramatic increase in OPC differentiation and remyelination factors that may represent a compensatory response like that seen in models of oligodendrocyte loss.
“This epoch also features losses of oligodendrocytes and a dramatic increase in OPC differentiation and remyelination factors that may represent a compensatory response like that seen in models of oligodendrocyte loss86,87.”
From Integrated multimodal cell atlas of Alzheimer’s disease (2024) · cites this paper as [87]
The Discussion (page unavailable) reports early myelin loss and reduced OPC self-renewal in 3xTg-AD mice. It does not report early losses of oligodendrocytes or a dramatic increase in OPC differentiation and remyelination factors; instead, it suggests reduced differentiation may contribute to declining myelination. The proposed compensatory response is not established by this paper. (LLM, conf=0.82)
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References 63 · Cited by 130
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- Authors
- Vanzulli, I., Papanikolaou, M., De-La-Rocha, I. C., Pieropan, F., Rivera, A. D., Gomez-Nicola, D., Verkhratsky, A., Rodríguez, J. J., & Butt, A. M.
- Affiliations
- University of Portsmouth (GB)
- Ikerbasque (ES)
- Corresponding author
- Butt, Arthur M.
- Venue
- Neurobiology of Aging
- Publisher
- Elsevier BV
- Published
- 2020-10
- Volume
- 94
- Pages
- 130-139
- ISSN
- 0197-4580 (ISSN-L)
- PMC
- PMC7453384
- OpenAlex
- W3033481761
- Cited by
- 130
- References
- 63
- Citations by year
- 2026: 6 · 2025: 33 · 2024: 23 · 2023: 22 · 2022: 22 · 2021: 18 · 2020: 6
- FWCI
- 6.69
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Neurobiology of Aging (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Research Explorer (The University of Manchester) (publishedVersion, cc-by)
- ePrints Soton (University of Southampton) (acceptedVersion)
- Communities in ADDI (Universidad del Pais Vasco) (submittedVersion, other-oa)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by)
- Hispana (submittedVersion, cc-by)
- Funders
- Medical Research Council
- Alzheimer’s Research UK
- Biotechnology and Biological Sciences Research Council
- FP7 People: Marie-Curie Actions
- Topics
- Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Keywords
- oligodendrocyte precursor cells, NG2 glia, Alzheimer's disease, 3xTg-AD mice, demyelination, myelin basic protein, hippocampus, amyloid plaques, cognitive decline, aging, myelination
- MeSH terms
- Aging, Alzheimer Disease, Animals, Atrophy, Disease Models, Animal, Female, Hippocampus, Hypertrophy, Male, Mice, Inbred C57BL, Mice, Transgenic, Myelin Sheath, Oligodendroglia, Stem Cells, Amyloid beta-Peptides
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