Cited by 298Alzheimer's disease research and treatmentsMemory and Neural MechanismsDementia and Cognitive Impairment Research

Temporal memory deficits in Alzheimer’s mouse models: Rescue by genetic deletion of BACE1

Ohno, Masuo, Chang, Lei, Tseng, Wilbur, Oakley, Holly, Citron, Martin, Klein, William L., Vassar, Robert, Disterhoft, John F.·2006·European Journal of Neuroscience

Abstract

Transgenic mouse models of Alzheimer's disease (AD) exhibit amyloid-beta (Abeta) accumulation and related cognitive impairments. Although deficits in hippocampus-dependent place learning have been well characterized in Alzheimer's transgenic mice, little is known about temporal memory function in these AD models. Here, we applied trace fear conditioning to two different Alzheimer's mouse models and investigated the relationship between pathogenic Abeta and temporal memory deficits. This behavioral test requires hippocampus-dependent temporal memory processing as the conditioned and unconditioned stimuli are separated by a trace interval of 30 s. We found that both amyloid precursor protein (APP) transgenic (Tg2576) and APP/presenilin (PS)1 transgenic (Tg6799) mice were impaired in memorizing this association across the time gap. Both transgenic groups performed as well as wild-type control mice in delay fear conditioning when the trace interval was removed, indicating that the trace conditioning deficits are hippocampus-specific. Importantly, Tg6799 mice engineered to lack the major Alzheimer's beta-secretase (beta-site APP-cleaving enzyme 1: BACE1) showed behavioral rescue from temporal memory deficits. Elevated levels of soluble Abeta oligomers found in Tg6799+ mouse brains returned to wild-type control levels without changes in APP/PS1 transgene expression in BACE1-/- * Tg6799+ bigenic mouse brains, suggesting Abeta oligomers as potential mediators of memory loss. Thus, trace fear conditioning is a useful assay to test the mechanisms and therapeutic interventions for Abeta-dependent deficits in temporal associative memory. Our gene-based approach suggests that lowering soluble Abeta oligomers by inhibiting BACE1 may be beneficial for alleviating cognitive disorders in AD.

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Crossref · 10.1111/j.1460-9568.2005.04551.x

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Authors
Ohno, M., Chang, L., Tseng, W., Oakley, H., Citron, M., Klein, W. L., Vassar, R., & Disterhoft, J. F.
Affiliations
  • Northwestern University (US)
  • Amgen (United States) (US)
Venue
European Journal of Neuroscience
Publisher
Wiley
Published
2006-01
Volume
23
Issue
1
Pages
251-260
ISSN
  • 0953-816X (ISSN-L)
  • 1460-9568
OpenAlex
W2093419961
Cited by
298
References
62
Citations by year
2026: 3 · 2025: 13 · 2024: 19 · 2023: 13 · 2022: 15 · 2021: 14 · 2020: 13 · 2019: 14 · 2018: 6 · 2017: 18 · 2016: 16 · 2015: 17 · 2014: 22 · 2013: 15 · 2012: 21
FWCI
10.87
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (R37AG011385, R37AG008796, R01AG022560, R01AG022547)
  • National Institute of Mental Health (R01MH067251)
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
Alzheimer's disease, temporal memory, BACE1, amyloid-beta oligomers, trace fear conditioning, hippocampal-dependent memory, APP/PS1 mice, Tg2576 mice, beta-secretase inhibition, amyloid-beta deposition
MeSH terms
Alzheimer Disease, Analysis of Variance, Animals, Conditioning, Psychological, Disease Models, Animal, Enzyme-Linked Immunosorbent Assay, Fear, Membrane Proteins, Memory Disorders, Mice, Inbred C57BL, Mice, Transgenic, Endopeptidases, Immunoblotting, Blotting, Western, Amyloid beta-Peptides, Aspartic Acid Endopeptidases, Maze Learning, Mice, Presenilin-1, Amyloid Precursor Protein Secretases

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