Cited by 92Alzheimer's disease research and treatmentsNeurogenesis and neuroplasticity mechanismsNeuroinflammation and Neurodegeneration Mechanisms

Prolonged running, not fluoxetine treatment, increases neurogenesis, but does not alter neuropathology, in the 3xTg mouse model of Alzheimer’s disease

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Marlatt, Michael W., Potter, Michelle C., Bayer, Thomas A., van Praag, Henriette, Lucassen, Paul J.·2013·Current Topics in Behavioral Neurosciences

Abstract

Reductions in adult neurogenesis have been documented in the original 3xTg mouse model of Alzheimer's disease (AD), notably occurring at the same age when spatial memory deficits and amyloid plaque pathology appeared. As this suggested reduced neurogenesis was associated with behavioral deficits, we tested whether activity and pharmacological stimulation could prevent memory deficits and modify neurogenesis and/or neuropathology in the 3xTg model backcrossed to the C57Bl/6 strain. We chronically administered the antidepressant fluoxetine to one group of mice, allowed access to a running wheel in another, and combined both treatments in a third cohort. All treatments lasted for 11 months. The female 3xTg mice failed to exhibit any deficits in spatial learning and memory as measured in the Morris water maze, indicating that when backcrossed to the C57Bl/6 strain, the 3xTg mice lost the behavioral phenotype that was present in the original 3xTg mouse maintained on a hybrid background. Despite this, the backcrossed 3xTg mice expressed prominent intraneuronal amyloid beta (Aβ) levels in the cortex and amygdala, with lower levels in the CA1 area of the hippocampus. In the combined cohort, fluoxetine treatment interfered with exercise and reduced the total distance run. The extent of Aβ neuropathology, the tau accumulations, or BDNF levels, were not altered by prolonged exercise. Thus, neuropathology was present but not paralleled by spatial memory deficits in the backcrossed 3xTg mouse model of AD. Prolonged exercise for 11 months did improve the long-term survival of newborn neurons generated during middle-age, whereas fluoxetine had no effect. We further review and discuss the relevant literature in this respect.

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  • Negative results of chronic administration were reported and neurogenesis-independent mechanisms of fluoxetine action were described.

    “Negative results of chronic administration were reported (Marlatt et al., 2013) and neurogenesis-independent mechanisms of fluoxetine action were described (David et al., 2009).”
  • Prolonged running in the 3xTg AD mouse model increased neurogenesis (in terms of progenitor cells survival) without effects on differentiation and no evident influence on the AD pathology.

    “Concerning voluntary exercise, for example it has been shown that prolonged running in the 3xTg AD mouse model did increase neurogenesis (in terms of progenitor cells survival) without effects on differentiation and no evident influence on the AD pathology (Marlatt et al., 2013).”

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Authors
Marlatt, M. W., Potter, M. C., Bayer, T. A., van Praag, H., & Lucassen, P. J.
Affiliations
  • National Institute on Aging (US)
  • University of Göttingen (DE)
  • University of Amsterdam (NL)
Corresponding author
Lucassen, Paul J.
Venue
Current Topics in Behavioral Neurosciences
Published
2013
Volume
15
Pages
313-340
ISSN
  • 1866-3370 (ISSN-L)
  • 1866-3389
OpenAlex
W2096481146
Cited by
92
References
71
Citations by year
2026: 2 · 2024: 7 · 2023: 1 · 2022: 2 · 2021: 6 · 2020: 7 · 2019: 11 · 2018: 8 · 2017: 14 · 2016: 11 · 2015: 9 · 2014: 12 · 2013: 2
FWCI
43.59
Type
book chapter
Language
en
Open access
Locations
  • Current topics in behavioral neurosciences (publishedVersion)
  • PubMed (publishedVersion)
  • UvA-DARE (University of Amsterdam) (publishedVersion)
  • PubMed Central (acceptedVersion)
  • UvA-DARE (University of Amsterdam) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Funders
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek
  • National Institutes of Health
  • National Institute on Aging (ZIAAG000328, Z01AG000328)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Alzheimer's disease, 3xTg mouse model, adult neurogenesis, physical activity, running wheel, fluoxetine, antidepressant treatment, spatial memory impairment, amyloid-beta, tau accumulation, brain-derived neurotrophic factor, hippocampus, neuropathology, behavioral phenotypes
MeSH terms
Alzheimer Disease, Amygdala, Animals, Behavior, Animal, Cerebral Cortex, Combined Modality Therapy, Disease Models, Animal, Exercise Therapy, Female, Fluoxetine, Hippocampus, Learning, Memory, Mice, Inbred C57BL, Mice, Transgenic, Running, Selective Serotonin Reuptake Inhibitors, Maze Learning, Mice, Cerebrum, Neurogenesis

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