Cited by 6Alzheimer's disease research and treatmentsMemory and Neural MechanismsDementia and Cognitive Impairment Research

Initial assessment of the spatial learning, reversal, and sequencing task capabilities of knock-in rats with humanizing mutations in the Aβ-coding region of App

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Pham, Hoa, Yin, Tao, D’Adamio, Luciano·2022·PLOS ONE

Published version of a preprint

Abstract

Model organisms mimicking the pathogenesis of human diseases are useful for identifying pathogenic mechanisms and testing therapeutic efficacy of compounds targeting them. Models of Alzheimer’s disease (AD) and related dementias (ADRD) aim to reproduce the brain pathology associated with these neurodegenerative disorders. Transgenic models, which involve random insertion of disease-causing genes under the control of artificial promoters, are efficient means of doing so. There are confounding factors associated with transgenic approaches, however, including target gene overexpression, dysregulation of endogenous gene expression at transgenes’ integration sites, and limitations in mimicking loss-of-function mechanisms. Furthermore, the choice of species is important, and there are anatomical, physiological, and cognitive reasons for favoring the rat over the mouse, which has been the standard for models of neurodegeneration and dementia. We report an initial assessment of the spatial learning, reversal, and sequencing task capabilities of knock-in (KI) Long-Evans rats with humanizing mutations in the Aβ-coding region of App , which encodes amyloid precursor protein ( App h/h rats), using the IntelliCage, an automated operant social home cage system, at 6–8 weeks of age, then again at 4–5 months of age. These rats were previously generated as control organisms for studies on neurodegeneration involving other knock-in rat models from our lab. App h/h rats of either sex can acquire place learning and reversal tasks. They can also acquire a diagonal sequencing task by 6–8 weeks of age, but not a more advanced serial reversal task involving alternating diagonals, even by 4–5 months of age. Thus, longitudinal behavioral analysis with the IntelliCage system can be useful to determine, in follow-up studies, whether KI rat models of Familial AD (FAD), sporadic late onset AD (LOAD), and of ADRD develop aging-dependent learning and memory deficits.

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  1. [41]Ren S, Breuillaud L, Yao W, Yin T, Norris KA, Zehntner SP, et al. TNFα reduces inhibitory transmission in young Trem2R47H Sporadic Alzheimer rats before observable Aβ and brain pathology. bioRxiv 2020.

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Authors
Pham, H., Yin, T., & D’Adamio, L.
Affiliations
Rutgers, The State University of New Jersey (US)
Venue
PLOS ONE
Published
2022-05-04
Volume
17
Issue
5
Pages
e0263546
ISSN
1932-6203 (ISSN-L)
OpenAlex
W4229049228
Cited by
6
References
77
Citations by year
2024: 4 · 2022: 2
FWCI
0.93
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institute on Aging (R01 AG073182, R01AG063407-03, 1RF1AG064821-01)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
amyloid precursor protein, Alzheimer's disease, related dementias, spatial learning, reversal learning, IntelliCage, learning and memory impairment, familial Alzheimer's disease, Long-Evans rats
MeSH terms
Alzheimer Disease, Animals, Disease Models, Animal, Mice, Transgenic, Mutation, Reversal Learning, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Rats, Long-Evans, Rats, Mobile Applications

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