Observations in APP Bitransgenic Mice Suggest that Diffuse and Compact Plaques Form via Independent Processes in Alzheimer's Disease
Studies of familial Alzheimer's disease suggest that misfolding and aggregation of amyloid-β (Aβ) peptides initiate the pathogenesis. The Arctic mutation of Aβ precursor protein (APP) results in AD, and Arctic Aβ is more prone to form Aβ protofibrils and extracellular deposits. Herein is demons...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081149 http://www.ncbi.nlm.nih.gov/pubmed/21514441 https://doi.org/10.1016/j.ajpath.2011.01.052 |
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ftpubmed:oai:pubmedcentral.nih.gov:3081149 2023-05-15T14:38:17+02:00 Observations in APP Bitransgenic Mice Suggest that Diffuse and Compact Plaques Form via Independent Processes in Alzheimer's Disease Lord, Anna Philipson, Ola Klingstedt, Therése Westermark, Gunilla Hammarström, Per Nilsson, K. Peter R. Nilsson, Lars N.G. 2011-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081149 http://www.ncbi.nlm.nih.gov/pubmed/21514441 https://doi.org/10.1016/j.ajpath.2011.01.052 en eng American Society for Investigative Pathology http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081149 http://www.ncbi.nlm.nih.gov/pubmed/21514441 http://dx.doi.org/10.1016/j.ajpath.2011.01.052 © 2011 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved. Regular Article Text 2011 ftpubmed https://doi.org/10.1016/j.ajpath.2011.01.052 2013-09-03T13:44:23Z Studies of familial Alzheimer's disease suggest that misfolding and aggregation of amyloid-β (Aβ) peptides initiate the pathogenesis. The Arctic mutation of Aβ precursor protein (APP) results in AD, and Arctic Aβ is more prone to form Aβ protofibrils and extracellular deposits. Herein is demonstrated that the burden of diffuse Aβ deposits but not compact plaques is increased when tg-Swe mice are crossed with tg-ArcSwe mice synthesizing low levels of Arctic Aβ. The diffuse deposits in bitransgenic mice, which contain primarily wild-type Aβ42, accumulate in regions both with and without transgene expression. However, APP processing, when compared with tg-Swe, remains unchanged in young bitransgenic mice, whereas wild-type Aβ42 aggregation is accelerated and fibril architecture is altered in vitro and in vivo when a low level of Arctic Aβ42 is introduced. Thus, the increased number of diffuse deposits is likely due to physical interactions between Arctic Aβ and wild-type Aβ42. The selective increase of a single type of parenchymal Aβ deposit suggests that different pathways lead to formation of diffuse and compact plaques. These findings could have general implications for Alzheimer's disease pathogenesis and particular relevance to patients heterozygous for the Arctic APP mutation. Moreover, it further illustrates how Aβ neuropathologic features can be manipulated in vivo by mechanisms similar to those originally conceptualized in prion research. Text Arctic PubMed Central (PMC) Arctic The American Journal of Pathology 178 5 2286 2298 |
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Regular Article Lord, Anna Philipson, Ola Klingstedt, Therése Westermark, Gunilla Hammarström, Per Nilsson, K. Peter R. Nilsson, Lars N.G. Observations in APP Bitransgenic Mice Suggest that Diffuse and Compact Plaques Form via Independent Processes in Alzheimer's Disease |
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Regular Article |
description |
Studies of familial Alzheimer's disease suggest that misfolding and aggregation of amyloid-β (Aβ) peptides initiate the pathogenesis. The Arctic mutation of Aβ precursor protein (APP) results in AD, and Arctic Aβ is more prone to form Aβ protofibrils and extracellular deposits. Herein is demonstrated that the burden of diffuse Aβ deposits but not compact plaques is increased when tg-Swe mice are crossed with tg-ArcSwe mice synthesizing low levels of Arctic Aβ. The diffuse deposits in bitransgenic mice, which contain primarily wild-type Aβ42, accumulate in regions both with and without transgene expression. However, APP processing, when compared with tg-Swe, remains unchanged in young bitransgenic mice, whereas wild-type Aβ42 aggregation is accelerated and fibril architecture is altered in vitro and in vivo when a low level of Arctic Aβ42 is introduced. Thus, the increased number of diffuse deposits is likely due to physical interactions between Arctic Aβ and wild-type Aβ42. The selective increase of a single type of parenchymal Aβ deposit suggests that different pathways lead to formation of diffuse and compact plaques. These findings could have general implications for Alzheimer's disease pathogenesis and particular relevance to patients heterozygous for the Arctic APP mutation. Moreover, it further illustrates how Aβ neuropathologic features can be manipulated in vivo by mechanisms similar to those originally conceptualized in prion research. |
format |
Text |
author |
Lord, Anna Philipson, Ola Klingstedt, Therése Westermark, Gunilla Hammarström, Per Nilsson, K. Peter R. Nilsson, Lars N.G. |
author_facet |
Lord, Anna Philipson, Ola Klingstedt, Therése Westermark, Gunilla Hammarström, Per Nilsson, K. Peter R. Nilsson, Lars N.G. |
author_sort |
Lord, Anna |
title |
Observations in APP Bitransgenic Mice Suggest that Diffuse and Compact Plaques Form via Independent Processes in Alzheimer's Disease |
title_short |
Observations in APP Bitransgenic Mice Suggest that Diffuse and Compact Plaques Form via Independent Processes in Alzheimer's Disease |
title_full |
Observations in APP Bitransgenic Mice Suggest that Diffuse and Compact Plaques Form via Independent Processes in Alzheimer's Disease |
title_fullStr |
Observations in APP Bitransgenic Mice Suggest that Diffuse and Compact Plaques Form via Independent Processes in Alzheimer's Disease |
title_full_unstemmed |
Observations in APP Bitransgenic Mice Suggest that Diffuse and Compact Plaques Form via Independent Processes in Alzheimer's Disease |
title_sort |
observations in app bitransgenic mice suggest that diffuse and compact plaques form via independent processes in alzheimer's disease |
publisher |
American Society for Investigative Pathology |
publishDate |
2011 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081149 http://www.ncbi.nlm.nih.gov/pubmed/21514441 https://doi.org/10.1016/j.ajpath.2011.01.052 |
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Arctic |
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Arctic |
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Arctic |
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Arctic |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081149 http://www.ncbi.nlm.nih.gov/pubmed/21514441 http://dx.doi.org/10.1016/j.ajpath.2011.01.052 |
op_rights |
© 2011 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.ajpath.2011.01.052 |
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The American Journal of Pathology |
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178 |
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5 |
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2286 |
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2298 |
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1766310388579696640 |