Cited by 318Gut microbiota and healthAlzheimer's disease research and treatmentsGastrointestinal motility and disorders

Altered Gut Microbiome Composition and Tryptic Activity of the 5xFAD Alzheimer’s Mouse Model

Brandscheid, Carolin, Schuck, Florian, Reinhardt, Sven, Schäfer, Karl-Herbert, Pietrzik, Claus U., Grimm, Marcus, Hartmann, Tobias, Schwiertz, Andreas +1 more·2017·Journal of Alzheimer s Disease

Abstract

The regulation of physiological gut functions such as peristalsis or secretion of digestive enzymes by the central nervous system via the Nervus vagus is well known. Recent investigations highlight that pathological conditions of neurological or psychiatric disorders might directly interfere with the autonomous neuronal network of the gut - the enteric nervous system, or even derive from there. By using a murine Alzheimer's disease model, we investigated a potential influence of disease-associated changes on gastrointestinal properties. 5xFAD mice at three different ages were compared to wild type littermates in regard to metabolic parameters and enzymes of the gut by fluorimetric enzyme assay and western blotting. Overexpression of human amyloid-β protein precursor (AβPP) within the gut was assessed by qPCR and IHC; fecal microbiome analysis was conducted by 16SrRNA quantitation of selected phyla and species. While general composition of fecal samples, locomotion, and food consumption of male 5xFAD animals were not changed, we observed a reduced body weight occurring at early pathological stages. Human AβPP was not only expressed within the brain of these mice but also in gut tissue. Analysis of fecal proteins revealed a reduced trypsin amount in the 5xFAD model mice as compared to the wild type. In addition, we observed changes in fecal microbiota composition along with age. We therefore suggest that the presence of the mutated transgenes (AβPP and PS1), which are per se the basis for the genetic form of Alzheimer's disease in humans, directly interferes with gut function as shown here for the disease model mice.

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Crossref · 10.3233/jad-160926

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  • 5xFAD mice recapitulate significant Alzheimer's disease and fecal microbial composition features that evolve with age.

    “Additionally, 5xFAD mice (over-expressing in the brain the mutant human APP carrying Swedish, Florida, and London Familial Alzheimer’s Disease (FAD) mutations along with human PS1 harboring two FAD mutations) recapitulate significant AD and fecal microbial composition features that evolve with age (162, 163).”

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Authors
Brandscheid, C., Schuck, F., Reinhardt, S., Schäfer, K.-H., Pietrzik, C. U., Grimm, M., Hartmann, T., Schwiertz, A., & Endres, K.
Affiliations
  • Johannes Gutenberg University Mainz (DE)
  • University of Applied Sciences Kaiserslautern (DE)
  • University Medical Center of the Johannes Gutenberg University Mainz (DE)
  • Saarland University (DE)
  • Institut für Mikroökologie (DE)
Corresponding author
Endres, Kristina
Venue
Journal of Alzheimer s Disease
Published
2016-12-30
Volume
56
Issue
2
Pages
775-788
ISSN
  • 1387-2877 (ISSN-L)
  • 1875-8908
OpenAlex
W2566271081
Cited by
318
References
70
Citations by year
2026: 13 · 2025: 33 · 2024: 49 · 2023: 42 · 2022: 42 · 2021: 43 · 2020: 42 · 2019: 24 · 2018: 18 · 2017: 11
FWCI
9.19
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Alzheimer s Disease (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
Alzheimer's disease, 5xFAD mice
MeSH terms
Gastrointestinal Microbiome, Aging, Alzheimer Disease, Animals, Body Weight, Colon, Disease Models, Animal, Eating, Feces, Humans, Male, Mice, Inbred C57BL, Mice, Transgenic, Trypsin, Amyloid beta-Protein Precursor, Presenilin-1

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