Cited by 85Alzheimer's disease research and treatmentsNeurological Disease Mechanisms and TreatmentsNeuroinflammation and Neurodegeneration Mechanisms

High fat diet worsens Alzheimer’s disease-related behavioral abnormalities and neuropathology in APP/PS1 mice, but not by synergistically decreasing cerebral blood flow.

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Bracko, Oliver, Vinarcsik, Lindsay K., Cruz Hernández, Jean C., Ruiz-Uribe, Nancy E., Haft-Javaherian, Mohammad, Falkenhain, Kaja, Ramanauskaite, Egle M., Ali, Muhammad +7 more·2020·Scientific Reports

Abstract

Obesity is linked to increased risk for and severity of Alzheimer’s disease (AD). Cerebral blood flow (CBF) reductions are an early feature of AD and are also linked to obesity. We recently showed that non-flowing capillaries, caused by adhered neutrophils, contribute to CBF reduction in mouse models of AD. Because obesity could exacerbate the vascular inflammation likely underlying this neutrophil adhesion, we tested links between obesity and AD by feeding APP/PS1 mice a high fat diet (Hfd) and evaluating behavioral, physiological, and pathological changes. We found trends toward poorer memory performance in APP/PS1 mice fed a Hfd, impaired social interactions with either APP/PS1 genotype or a Hfd, and synergistic impairment of sensory-motor function in APP/PS1 mice fed a Hfd. The Hfd led to increases in amyloid-beta monomers and plaques in APP/PS1 mice, as well as increased brain inflammation. These results agree with previous reports showing obesity exacerbates AD-related pathology and symptoms in mice. We used a crowd-sourced, citizen science approach to analyze imaging data to determine the impact of the APP/PS1 genotype and a Hfd on capillary stalling and CBF. Surprisingly, we did not see an increase in the number of non-flowing capillaries or a worsening of the CBF deficit in APP/PS1 mice fed a Hfd as compared to controls, suggesting that capillary stalling is not a mechanistic link between a Hfd and increased severity of AD in mice. Reducing capillary stalling by blocking neutrophil adhesion improved CBF and short-term memory function in APP/PS1 mice, even when fed a Hfd.

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  • Addition of a high fat/high sugar diet exacerbates Alzheimer's disease phenotypes in mouse models relevant to early-onset AD.

    “Also, the addition of an HFD exacerbated AD phenotypes in mouse models relevant to early-onset AD (Knight et al., 2014; Jones et al., 2019; Bracko et al., 2020; Robison et al., 2020; Jones et al., 2021).”

    From Plcg2M28L Interacts With High Fat/High Sugar Diet to Accelerate Alzheimer’s Disease-Relevant Phenotypes in Mice (2022) · cites this paper as Bracko et al., 2020

    The Discussion reports that a high-fat diet increased amyloid pathology, inflammation, and behavioral deficits in APP/PS1 mice. The Methods describe the diet as high-fat but do not establish the claim’s additional “high sugar” characterization; the verbatim citing sentence itself says only “HFD.” (LLM, conf=0.84)

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  1. [48]Carpentier Giles, H. E. Dot Blot Analyzer: Software development using the macro language of ImageJ. Proceedings of the ImageJ User and Developer Conference pp. 3-5-189 (2008).

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Authors
Bracko, O., Vinarcsik, L. K., Cruz Hernández, J. C., Ruiz-Uribe, N. E., Haft-Javaherian, M., Falkenhain, K., Ramanauskaite, E. M., Ali, M., Mohapatra, A., Swallow, M. A., Njiru, B. N., Muse, V., Michelucci, P. E., Nishimura, N., & Schaffer, C. B.
Affiliations
  • Cornell University (US)
  • Human Computation Institute (US)
Corresponding author
Schaffer, Chris B.
Venue
Scientific Reports
Published
2020-06-18
Volume
10
Issue
1
Pages
9884-9884
ISSN
2045-2322 (ISSN-L)
OpenAlex
W3035923503
Cited by
85
References
70
Citations by year
2026: 8 · 2025: 15 · 2024: 10 · 2023: 15 · 2022: 15 · 2021: 18 · 2020: 4
FWCI
7.82
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Science Foundation
  • BrightFocus Foundation
  • Deutsche Forschungsgemeinschaft
  • National Institutes of Health (1s10rr025502-01, AG049952)
  • National Institute on Aging (RF1AG049952, R01AG049952)
  • National Institute of Neurological Disorders and Stroke (R01NS108472)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Alzheimer's disease, high-fat diet, obesity, APP/PS1 mice, cerebral blood flow, neutrophil adhesion, amyloid plaques, neuroinflammation, memory impairment, social interaction, sensorimotor function, vascular inflammation
MeSH terms
Alzheimer Disease, Animals, Behavior, Animal, Blood Vessels, Cerebrovascular Circulation, Disease Models, Animal, Female, Genotype, Male, Memory, Short-Term, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Cytokines, Amyloid beta-Protein Precursor, Mice, Presenilin-1, Diet, High-Fat

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