Blood-derived amyloid-β protein induces Alzheimer's disease pathologies

The amyloid-β protein (Aβ) protein plays a pivotal role in the pathogenesis of Alzheimer's disease (AD). It is believed that Aβ deposited in the brain originates from the brain tissue itself. However, Aβ is generated in both brain and peripheral tissues. Whether circulating Aβ contributes to br...

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Published in:Molecular psychiatry Vol. 23; no. 9; pp. 1948 - 1956
Main Authors: Bu, X-L, Xiang, Y, Jin, W-S, Wang, J, Shen, L-L, Huang, Z-L, Zhang, K, Liu, Y-H, Zeng, F, Liu, J-H, Sun, H-L, Zhuang, Z-Q, Chen, S-H, Yao, X-Q, Giunta, B, Shan, Y-C, Tan, J, Chen, X-W, Dong, Z-F, Zhou, H-D, Zhou, X-F, Song, W, Wang, Y-J
Format: Journal Article
Language:English
Published: England Nature Publishing Group 01.09.2018
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ISSN:1359-4184, 1476-5578, 1476-5578
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Abstract The amyloid-β protein (Aβ) protein plays a pivotal role in the pathogenesis of Alzheimer's disease (AD). It is believed that Aβ deposited in the brain originates from the brain tissue itself. However, Aβ is generated in both brain and peripheral tissues. Whether circulating Aβ contributes to brain AD-type pathologies remains largely unknown. In this study, using a model of parabiosis between APPswe/PS1dE9 transgenic AD mice and their wild-type littermates, we observed that the human Aβ originated from transgenic AD model mice entered the circulation and accumulated in the brains of wild-type mice, and formed cerebral amyloid angiopathy and Aβ plaques after a 12-month period of parabiosis. AD-type pathologies related to the Aβ accumulation including tau hyperphosphorylation, neurodegeneration, neuroinflammation and microhemorrhage were found in the brains of the parabiotic wild-type mice. More importantly, hippocampal CA1 long-term potentiation was markedly impaired in parabiotic wild-type mice. To the best of our knowledge, our study is the first to reveal that blood-derived Aβ can enter the brain, form the Aβ-related pathologies and induce functional deficits of neurons. Our study provides novel insight into AD pathogenesis and provides evidence that supports the development of therapies for AD by targeting Aβ metabolism in both the brain and the periphery.
AbstractList The amyloid-β protein (Aβ) protein plays a pivotal role in the pathogenesis of Alzheimer's disease (AD). It is believed that Aβ deposited in the brain originates from the brain tissue itself. However, Aβ is generated in both brain and peripheral tissues. Whether circulating Aβ contributes to brain AD-type pathologies remains largely unknown. In this study, using a model of parabiosis between APPswe/PS1dE9 transgenic AD mice and their wild-type littermates, we observed that the human Aβ originated from transgenic AD model mice entered the circulation and accumulated in the brains of wild-type mice, and formed cerebral amyloid angiopathy and Aβ plaques after a 12-month period of parabiosis. AD-type pathologies related to the Aβ accumulation including tau hyperphosphorylation, neurodegeneration, neuroinflammation and microhemorrhage were found in the brains of the parabiotic wild-type mice. More importantly, hippocampal CA1 long-term potentiation was markedly impaired in parabiotic wild-type mice. To the best of our knowledge, our study is the first to reveal that blood-derived Aβ can enter the brain, form the Aβ-related pathologies and induce functional deficits of neurons. Our study provides novel insight into AD pathogenesis and provides evidence that supports the development of therapies for AD by targeting Aβ metabolism in both the brain and the periphery.
The amyloid-β protein (Aβ) protein plays a pivotal role in the pathogenesis of Alzheimer's disease (AD). It is believed that Aβ deposited in the brain originates from the brain tissue itself. However, Aβ is generated in both brain and peripheral tissues. Whether circulating Aβ contributes to brain AD-type pathologies remains largely unknown. In this study, using a model of parabiosis between APPswe/PS1dE9 transgenic AD mice and their wild-type littermates, we observed that the human Aβ originated from transgenic AD model mice entered the circulation and accumulated in the brains of wild-type mice, and formed cerebral amyloid angiopathy and Aβ plaques after a 12-month period of parabiosis. AD-type pathologies related to the Aβ accumulation including tau hyperphosphorylation, neurodegeneration, neuroinflammation and microhemorrhage were found in the brains of the parabiotic wild-type mice. More importantly, hippocampal CA1 long-term potentiation was markedly impaired in parabiotic wild-type mice. To the best of our knowledge, our study is the first to reveal that blood-derived Aβ can enter the brain, form the Aβ-related pathologies and induce functional deficits of neurons. Our study provides novel insight into AD pathogenesis and provides evidence that supports the development of therapies for AD by targeting Aβ metabolism in both the brain and the periphery.The amyloid-β protein (Aβ) protein plays a pivotal role in the pathogenesis of Alzheimer's disease (AD). It is believed that Aβ deposited in the brain originates from the brain tissue itself. However, Aβ is generated in both brain and peripheral tissues. Whether circulating Aβ contributes to brain AD-type pathologies remains largely unknown. In this study, using a model of parabiosis between APPswe/PS1dE9 transgenic AD mice and their wild-type littermates, we observed that the human Aβ originated from transgenic AD model mice entered the circulation and accumulated in the brains of wild-type mice, and formed cerebral amyloid angiopathy and Aβ plaques after a 12-month period of parabiosis. AD-type pathologies related to the Aβ accumulation including tau hyperphosphorylation, neurodegeneration, neuroinflammation and microhemorrhage were found in the brains of the parabiotic wild-type mice. More importantly, hippocampal CA1 long-term potentiation was markedly impaired in parabiotic wild-type mice. To the best of our knowledge, our study is the first to reveal that blood-derived Aβ can enter the brain, form the Aβ-related pathologies and induce functional deficits of neurons. Our study provides novel insight into AD pathogenesis and provides evidence that supports the development of therapies for AD by targeting Aβ metabolism in both the brain and the periphery.
Author Liu, Y-H
Song, W
Xiang, Y
Chen, S-H
Dong, Z-F
Zhou, H-D
Shen, L-L
Zeng, F
Chen, X-W
Yao, X-Q
Jin, W-S
Sun, H-L
Bu, X-L
Shan, Y-C
Wang, J
Liu, J-H
Huang, Z-L
Zhuang, Z-Q
Giunta, B
Tan, J
Zhou, X-F
Zhang, K
Wang, Y-J
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  organization: Neuroimmunology Laboratory, Department of Psychiatry and Behavioral Neurosciences, Morsani College of Medicine, University of South Florida, Tampa, FL, USA
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  surname: Shan
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  organization: CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
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  surname: Tan
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  organization: Rashid Laboratory for Developmental Neurobiology, Silver Child Development Center, Department of Psychiatry and Behavioral Neurosciences, Morsani College of Medicine, University of South Florida, Tampa, FL, USA
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  email: weihong@mail.ubc.ca
  organization: Townsend Family Laboratories, Department of Psychiatry, The University of British Columbia, Vancouver, BC, Canada. weihong@mail.ubc.ca
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/29086767$$D View this record in MEDLINE/PubMed
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PublicationTitle Molecular psychiatry
PublicationTitleAlternate Mol Psychiatry
PublicationYear 2018
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References 29123251 - Nat Rev Neurol. 2018 Jan;14(1):4
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Snippet The amyloid-β protein (Aβ) protein plays a pivotal role in the pathogenesis of Alzheimer's disease (AD). It is believed that Aβ deposited in the brain...
The amyloid-β protein (Aβ) protein plays a pivotal role in the pathogenesis of Alzheimer’s disease (AD). It is believed that Aβ deposited in the brain...
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SubjectTerms Alzheimer Disease - metabolism
Alzheimer Disease - pathology
Alzheimer's disease
Amyloid beta-Peptides - blood
Amyloid beta-Peptides - metabolism
Amyloid beta-Peptides - physiology
Amyloid beta-Protein Precursor - metabolism
Animals
Blood
Brain
Brain - metabolism
Brain - pathology
Cerebral amyloid angiopathy
Cerebral Amyloid Angiopathy - metabolism
Cerebral blood flow
Disease Models, Animal
Female
Hippocampus
Hippocampus - metabolism
Inflammation
Long-term potentiation
Male
Mice
Mice, Inbred C57BL
Mice, Transgenic
Neurodegeneration
Neurons - metabolism
Parabiosis
Parabiosis - methods
Pathogenesis
Phosphorylation
Plaque, Amyloid - etiology
Plaque, Amyloid - metabolism
Presenilin-1 - metabolism
Proteins
Rodents
Senile plaques
Tau protein
Transgenic mice
Title Blood-derived amyloid-β protein induces Alzheimer's disease pathologies
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