Cited by 30Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

The absence of myelin basic protein promotes neuroinflammation and reduces amyloid β-protein accumulation in Tg-5xFAD mice

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Ou-Yang, Ming-Hsuan, Van Nostrand, William E·2013·Journal of Neuroinflammation

Abstract

BACKGROUND: Abnormal accumulation of amyloid β-protein (Aβ) in the brain plays an important role in the pathogenesis \of Alzheimer's disease (AD). Aβ monomers assemble into oligomers and fibrils that promote neuronal dysfunction. This assembly pathway is influenced by naturally occurring brain molecules, the Aβ chaperone proteins, which bind to Aβ and modulate its aggregation. Myelin basic protein (MBP) was previously identified as a novel Aβ chaperone protein and a potent inhibitor for Aβ fibril assembly in vitro. METHODS: In this study, we determined whether the absence of MBP would influence Aβ pathology in vivo by breeding MBP knockout mice (MBP-/-) with Tg-5xFAD mice, a model of AD-like parenchymal Aβ pathology. RESULTS: Through biochemical and immunohistochemical experiments, we found that bigenic Tg-5xFAD/MBP-/- mice had a significant decrease of insoluble Aβ and parenchymal plaque deposition at an early age. The expression of transgene encoded human AβPP, the levels of C-terminal fragments generated during Aβ production and the intracellular Aβ were unaffected in the absence of MBP. Likewise, we did not find a significant difference in plasma Aβ or cerebrospinal fluid Aβ, suggesting these clearance routes were unaltered in bigenic Tg-5xFAD/MBP-/- mice. However, MBP-/- mice and bigenic Tg-5xFAD/MBP-/- mice exhibited elevated reactive astrocytes and activated microglia compared with Tg-5xFAD mice. The Aβ degrading enzyme matrix metalloproteinase 9 (MMP-9), which is expressed by activated glial cells, was significantly increased in the Tg-5xFAD/MBP-/- mice. CONCLUSIONS: These findings indicate that the absence of MBP decreases Aβ deposition in transgenic mice and that this consequence may result from increased glial activation and expression of MMP-9, an Aβ degrading enzyme.

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Authors
Ou-Yang, M.-H., & Van Nostrand, W. E.
Affiliations
Stony Brook University (US)
Venue
Journal of Neuroinflammation
Published
2013-11-05
Volume
10
Issue
1
Pages
134-134
ISSN
1742-2094 (ISSN-L)
OpenAlex
W2137664031
Cited by
30
References
81
Citations by year
2025: 2 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 3 · 2020: 4 · 2019: 4 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 6 · 2014: 2
FWCI
2.08
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroinflammation (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Eli Lilly and Company
  • National Institutes of Health
  • National Institute on Aging (R21AG039215)
  • National Institute of Neurological Disorders and Stroke (R21NS079951)
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
myelin basic protein, amyloid-beta, Alzheimer's disease, neuroinflammation, reactive astrocytes, microglial activation, MMP-9, amyloid beta degradation
MeSH terms
Alzheimer Disease, Animals, Brain, Disease Models, Animal, Myelin Basic Protein, Enzyme-Linked Immunosorbent Assay, Humans, Immunohistochemistry, Inflammation, Mice, Transgenic, Immunoblotting, Amyloid beta-Peptides, Mice, Knockout, Mice

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