Cited by 58Gut microbiota and healthAlzheimer's disease research and treatmentsDementia and Cognitive Impairment Research

The Role of the Microbiota-Gut-Brain Axis in the Development of Alzheimer’s Disease

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Wiatrak, Benita, Balon, Katarzyna, Jawień, Paulina, Bednarz, Dominika, Jęśkowiak, Izabela, Szeląg, Adam·2022·International Journal of Molecular Sciences

Abstract

Along with the increase in life expectancy in the populations of developed and developing countries resulting from better access and improved health care, the number of patients with dementia, including Alzheimer’s disease (AD), is growing. The disease was first diagnosed and described at the beginning of the 20th century. However, to this day, there is no effective causal therapy, and symptomatic treatment often improves patients’ quality of life only for a short time. The current pharmacological therapies are based mainly on the oldest hypotheses of the disease—cholinergic (drugs affecting the cholinergic system are available), the hypothesis of amyloid-β aggregation (an anti-amyloid drug was conditionally approved by the FDA in 2020), and one drug is an N-methyl-D-aspartate receptor (NMDAR) antagonist (memantine). Hypotheses about AD pathogenesis focus on the nervous system and the brain. As research progresses, it has become known that AD can be caused by diseases that have been experienced over the course of a lifetime, which could also affect other organs. In this review, we focus on the potential association of AD with the digestive system, primarily the gut microbiota. The role of diet quality in preventing and alleviating Alzheimer’s disease is also discussed. The problem of neuroinflammation, which may be the result of microbiota disorders, is also described. An important aspect of the work is the chapter on the treatment strategies for changing the microbiota, potentially protecting against the disease and alleviating its course in the initial stages.

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Crossref · 10.3390/ijms23094862

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  • The microbiota-gut-brain axis hypothesis suggests a bidirectional communication system between the gut and the brain, involving metabolic, endocrine, neural, and immune pathways.

    “The microbiota–gut–brain axis hypothesis suggests a bidirectional communication system between the gut and the brain, involving metabolic, endocrine, neural, and immune pathways.”
  • Dysbiosis can lead to a compromised intestinal epithelial barrier, allowing harmful substances and microorganisms to enter the bloodstream and trigger systemic inflammation, which may affect microglia and exacerbate neuroinflammation.

    “Dysbiosis, or disruption of the microbiota’s composition and functionality, can occur due to factors such as dietary changes, antibiotic use, psychosocial stress, or immune irregularities, leading to a compromised intestinal epithelial barrier.”

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Authors
Wiatrak, B., Balon, K., Jawień, P., Bednarz, D., Jęśkowiak, I., & Szeląg, A.
Affiliations
  • Wroclaw Medical University (PL)
  • Ludwik Hirszfeld Institute of Immunology and Experimental Therapy (PL)
  • Wrocław University of Environmental and Life Sciences (PL)
Corresponding author
  • Wiatrak, Benita
  • Jawień, Paulina
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2022-04-27
Volume
23
Issue
9
Pages
4862
ISSN
1422-0067 (ISSN-L)
OpenAlex
W4225006092
Cited by
58
References
122
Citations by year
2026: 8 · 2025: 11 · 2024: 11 · 2023: 23 · 2022: 5
FWCI
1.30
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
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 › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
Alzheimer's disease, gut microbiota, microbiota-gut-brain axis, neuroinflammation, diet quality, Alzheimer's disease pathogenesis, cholinergic hypothesis, amyloid-beta aggregation, NMDA receptor antagonists, dementia
MeSH terms
Brain-Gut Axis, Alzheimer Disease, Humans, Memantine, Quality of Life, Receptors, N-Methyl-D-Aspartate, Cholinergic Agents, Microbiota

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