Cited by 32Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsIntracerebral and Subarachnoid Hemorrhage Research

Distribution of neprilysin and deposit patterns of Aβ subtypes in the brains of aged squirrel monkeys (Saimiri sciureus)

Chambers, James K., Kuribayashi, Hiroyuki, Ikeda, Shu-Ichi, Une, Yumi·2010·Amyloid

Abstract

Beta-amyloid (Abeta) is deposited in the parenchyma and blood vessel walls of the senescent brain, and forms lesions termed senile plaques (SPs) and cerebral amyloid angiopathy (CAA). Since in Alzheimer's disease (AD) excessive Abeta is linked to cognitive deterioration, the mechanisms of degradation and clearance of Abeta are now being researched for use in AD therapy. We conducted an immunohistochemical study of the patterns of deposition of two Abeta subtypes (Abeta40 and Abeta42) and the distribution of the Abeta degrading enzyme neprilysin (NEP) in the brains of aged squirrel monkeys, a species known to develop CAA and SPs. Abeta deposits were observed mainly in the cerebral cortex of five older monkeys, and were absent in monkeys under 12 years of age. NEP expression was observed in the caudate nucleus, putamen, globus pallidus, substantia nigra and the molecular layer of the dentate gyrus, and thus exhibited a distribution complementary to those of CAA and SPs in cerebral cortex and hippocampus. It is known that CAA is more prominent than SPs in squirrel monkey brains. However, we confirmed that Abeta40 is deposited predominantly in the arterioles of the meninges and penetrates vertically into the cerebral cortex, whereas Abeta42 is deposited predominantly in the capillaries of the cerebral cortex. These distinct patterns of deposition of Abeta subtypes are likely related to the difference in biochemical character of these two subtypes. We have demonstrated for the first time the distribution of NEP in the brain of a non-human primate, the squirrel monkey, which appears useful for research on AD treatment.

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Registry

Crossref · 10.3109/13506129.2010.483119

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67 of 67 references verified0 citation errors · 0 not checkable

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  • Squirrel monkeys have extensive Aβ accumulation after 12 years of age, primarily in the form of CAA in arterioles and capillaries.

    “Squirrel monkeys have extensive Aβ accumulation after 12 years of age, primarily in the form of CAA in arterioles and capillaries [22, 36, 167, 168].”

    From Alzheimer's disease: experimental models and reality (2017) · cites this paper as [22]

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Authors
Chambers, J. K., Kuribayashi, H., Ikeda, S.-I., & Une, Y.
Affiliations
  • Azabu University (JP)
  • Shinshu University (JP)
Corresponding author
Une, Yumi
Venue
Amyloid
Published
2010-05-12
Volume
17
Issue
2
Pages
75-82
ISSN
  • 1350-6129 (ISSN-L)
  • 1744-2818
OpenAlex
W2127578299
Cited by
32
References
67
Citations by year
2024: 2 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 3 · 2018: 1 · 2017: 2 · 2016: 4 · 2015: 2 · 2014: 1 · 2013: 1 · 2012: 7
FWCI
3.03
Type
journal article
Language
en
Open access
closed
Locations
  • Amyloid (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of Tokyo
  • Chinese Academy of Agricultural Sciences
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Neurology › Intracerebral and Subarachnoid Hemorrhage Research
Keywords
neprilysin, amyloid-beta, Aβ40, amyloid-beta 42, cerebral amyloid angiopathy, amyloid plaques, Alzheimer's disease, squirrel monkey, Saimiri sciureus, amyloid clearance, brain aging, nonhuman primate model
MeSH terms
Aging, Animals, Brain, Female, Male, Peptide Fragments, Saimiri, Neprilysin, Amyloid beta-Peptides

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