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Article: Origins of Beta Amyloid Differ Between Vascular Amyloid Deposition and Parenchymal Amyloid Plaques in the Spinal Cord of a Mouse Model of Alzheimer's Disease

TitleOrigins of Beta Amyloid Differ Between Vascular Amyloid Deposition and Parenchymal Amyloid Plaques in the Spinal Cord of a Mouse Model of Alzheimer's Disease
Authors
Keywordsβ amyloid
Amyloid precursor protein
Alzheimer’s disease
Amyloid plaques
Cerebral amyloid angiopathy
Spinal cord
Issue Date2020
PublisherSpringer (part of Springer Nature): Springer Open Choice Hybrid Journals. The Journal's web site is located at https://www.springer.com/biomed/neuroscience/journal/12035
Citation
Molecular Neurobiology, 2020, v. 57 n. 1, p. 278-289 How to Cite?
AbstractCerebral amyloid angiopathy (CAA) refers to pathological changes occurring in cerebral blood vessels caused by deposition of beta amyloid (Aβ) protein. However, the mechanisms involved in the origin of Aβ for the formation of CAA and its link to parenchymal amyloid depositions remained to be unraveled. Here, we found CAA and parenchymal plaques distributed separately instead of mingling with each other in the spinal cord of TgCRND8 mice. Parenchymal plaques predominantly located in the dorsal horn whereas CAA distributed in the ventral horn. We further found that the ratio of Aβ40/Aβ42 was significantly higher in the ventral than that in the dorsal by ELISA assay, suggesting that origin of Aβ forming parenchymal plaques may be different from that of CAA in the spinal cord. This hypothesis was further demonstrated by the surgical methods which indicated eliminating parenchymal plaques did not alter CAA in the affected spinal cord. We also examined the ratio of Aβ40/Aβ42 in the cerebral spinal fluid (CSF) in order to identify the origin of the CAA formation, and found the Aβ40/Aβ42 ratio was similar to that of CAA formation in the ventral horn. We further demonstrated that CSF tracer distributed along ventral horn vessels, in exactly the same pattern as Aβ deposition in CAA in ventral part of spinal cord. These findings verified the concept that CSF influx may act as a constant source for delivering Aβ, and contribute to the growth of paraarterial deposits in CAA. Taken together, the results of the present study highlight the important role of the Aβ40/Aβ42 ratio in determining vascular versus parenchymal amyloid deposition. Unlike parenchymal plaques, Aβ of CAA comes from CSF; thus, manipulation of CSF Aβ could represent a novel strategy to treat CAA.
Persistent Identifierhttp://hdl.handle.net/10722/276225
ISSN
2019 Impact Factor: 4.5
2015 SCImago Journal Rankings: 1.819
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYuan, Q-
dc.contributor.authorLiu, X-
dc.contributor.authorXian, Y-
dc.contributor.authorTang, Y-
dc.contributor.authorZou, J-
dc.contributor.authorZhang, X-
dc.contributor.authorHuang, P-
dc.contributor.authorWu, W-
dc.contributor.authorSong, Y-
dc.contributor.authorLin, Z-
dc.date.accessioned2019-09-10T02:58:32Z-
dc.date.available2019-09-10T02:58:32Z-
dc.date.issued2020-
dc.identifier.citationMolecular Neurobiology, 2020, v. 57 n. 1, p. 278-289-
dc.identifier.issn0893-7648-
dc.identifier.urihttp://hdl.handle.net/10722/276225-
dc.description.abstractCerebral amyloid angiopathy (CAA) refers to pathological changes occurring in cerebral blood vessels caused by deposition of beta amyloid (Aβ) protein. However, the mechanisms involved in the origin of Aβ for the formation of CAA and its link to parenchymal amyloid depositions remained to be unraveled. Here, we found CAA and parenchymal plaques distributed separately instead of mingling with each other in the spinal cord of TgCRND8 mice. Parenchymal plaques predominantly located in the dorsal horn whereas CAA distributed in the ventral horn. We further found that the ratio of Aβ40/Aβ42 was significantly higher in the ventral than that in the dorsal by ELISA assay, suggesting that origin of Aβ forming parenchymal plaques may be different from that of CAA in the spinal cord. This hypothesis was further demonstrated by the surgical methods which indicated eliminating parenchymal plaques did not alter CAA in the affected spinal cord. We also examined the ratio of Aβ40/Aβ42 in the cerebral spinal fluid (CSF) in order to identify the origin of the CAA formation, and found the Aβ40/Aβ42 ratio was similar to that of CAA formation in the ventral horn. We further demonstrated that CSF tracer distributed along ventral horn vessels, in exactly the same pattern as Aβ deposition in CAA in ventral part of spinal cord. These findings verified the concept that CSF influx may act as a constant source for delivering Aβ, and contribute to the growth of paraarterial deposits in CAA. Taken together, the results of the present study highlight the important role of the Aβ40/Aβ42 ratio in determining vascular versus parenchymal amyloid deposition. Unlike parenchymal plaques, Aβ of CAA comes from CSF; thus, manipulation of CSF Aβ could represent a novel strategy to treat CAA.-
dc.languageeng-
dc.publisherSpringer (part of Springer Nature): Springer Open Choice Hybrid Journals. The Journal's web site is located at https://www.springer.com/biomed/neuroscience/journal/12035-
dc.relation.ispartofMolecular Neurobiology-
dc.subjectβ amyloid-
dc.subjectAmyloid precursor protein-
dc.subjectAlzheimer’s disease-
dc.subjectAmyloid plaques-
dc.subjectCerebral amyloid angiopathy-
dc.subjectSpinal cord-
dc.titleOrigins of Beta Amyloid Differ Between Vascular Amyloid Deposition and Parenchymal Amyloid Plaques in the Spinal Cord of a Mouse Model of Alzheimer's Disease-
dc.typeArticle-
dc.identifier.emailWu, W: wtwu@hku.hk-
dc.identifier.emailSong, Y: songy@hku.hk-
dc.identifier.authorityWu, W=rp00419-
dc.identifier.authoritySong, Y=rp00488-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s12035-019-01697-4-
dc.identifier.pmid31325023-
dc.identifier.scopuseid_2-s2.0-85069472814-
dc.identifier.hkuros303676-
dc.identifier.volume57-
dc.identifier.issue1-
dc.identifier.spage278-
dc.identifier.epage289-
dc.identifier.isiWOS:000520176200026-
dc.publisher.placeUnited States-

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