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Soluble brain homogenates from diverse human and mouse sources preferentially seed diffuse Aβ plaque pathology when injected into newborn mouse hosts

Moore, Brenda; Croft, Cara; Levites, Yona; Xu, Guilian; Hampton, Hailey; Adamo, Munie; Futch, Hunter; ... Borchelt, David; + view all (2022) Soluble brain homogenates from diverse human and mouse sources preferentially seed diffuse Aβ plaque pathology when injected into newborn mouse hosts. Free Neuropathology , 3 , Article 9. 10.17879/freeneuropathology-2022-3766. Green open access

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Abstract

Background: Seeding of pathology related to Alzheimer’s disease (AD) and Lewy body disease (LBD) by tissue homogenates or purified protein aggregates in various model systems has revealed prion-like properties of these disorders. Typically, these homogenates are injected into adult mice stereotaxically. Injection of brain lysates into newborn mice represents an alternative approach of delivering seeds that could direct the evolution of amyloid-β (Aβ) pathology co-mixed with either tau or α-synuclein (αSyn) pathology in susceptible mouse models. / Methods: Homogenates of human pre-frontal cortex were injected into the lateral ventricles of newborn (P0) mice expressing a mutant humanized amyloid precursor protein (APP), human P301L tau, human wild type αSyn, or combinations thereof. The homogenates were prepared from AD and AD/LBD cases displaying variable degrees of Aβ pathology and co-existing tau and αSyn deposits. Behavioral assessments of APP transgenic mice injected with AD brain lysates were conducted. For comparison, homogenates of aged APP transgenic mice that preferentially exhibit diffuse or cored deposits were similarly injected into the brains of newborn APP mice. / Results: We observed that lysates from the brains with AD (Aβ+, tau+), AD/LBD (Aβ+, tau+, αSyn+), or Pathological Aging (Aβ+, tau-, αSyn-) efficiently seeded diffuse Aβ deposits. Moderate seeding of cerebral amyloid angiopathy (CAA) was also observed. No animal of any genotype developed discernable tau or αSyn pathology. Performance in fear-conditioning cognitive tasks was not significantly altered in APP transgenic animals injected with AD brain lysates compared to nontransgenic controls. Homogenates prepared from aged APP transgenic mice with diffuse Aβ deposits induced similar deposits in APP host mice; whereas homogenates from APP mice with cored deposits induced similar cored deposits, albeit at a lower level. / Conclusions: These findings are consistent with the idea that diffuse Aβ pathology, which is a common feature of human AD, AD/LBD, and PA brains, may arise from a distinct strain of misfolded Aβ that is highly transmissible to newborn transgenic APP mice. Seeding of tau or αSyn comorbidities was inefficient in the models we used, indicating that additional methodological refinement will be needed to efficiently seed AD or AD/LBD mixed pathologies by injecting newborn mice.

Type: Article
Title: Soluble brain homogenates from diverse human and mouse sources preferentially seed diffuse Aβ plaque pathology when injected into newborn mouse hosts
Open access status: An open access version is available from UCL Discovery
DOI: 10.17879/freeneuropathology-2022-3766
Publisher version: https://doi.org/10.17879/freeneuropathology-2022-3...
Language: English
Additional information: Copyright © 2022 Brenda D. Moore, Yona Levites, Guilian Xu, Hailey Hampton, Munir F. Adamo, Cara L. Croft, Hunter S. Futch, Corey Moran, Susan Fromholt, Christopher Janus, Stefan Prokop, Dennis Dickson, Jada Lewis, Benoit I. Giasson, Todd E. Golde, David R. Borchelt. This work is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/).
Keywords: Amyloid-β, Tau, α-Synuclein, Seeding, Alzheimer’s disease, Lewy body dementia
UCL classification: UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > UK Dementia Research Institute
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
URI: https://discovery.ucl.ac.uk/id/eprint/10146122
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