Cited by 190Gut microbiota and healthGastrointestinal motility and disordersOral microbiology and periodontitis research

Gut Microbiota in Alzheimer’s Disease, Depression, and Type 2 Diabetes Mellitus: The Role of Oxidative Stress

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Luca, Maria, Di Mauro, Maurizio, Di Mauro, Marco, Luca, Antonina·2019·Oxidative Medicine and Cellular Longevity

Abstract

Gut microbiota consists of over 100 trillion microorganisms including at least 1000 different species of bacteria and is crucially involved in physiological and pathophysiological processes occurring in the host. An imbalanced gastrointestinal ecosystem (dysbiosis) seems to be a contributor to the development and maintenance of several diseases, such as Alzheimer’s disease, depression, and type 2 diabetes mellitus. Interestingly, the three disorders are frequently associated as demonstrated by the high comorbidity rates. In this review, we introduce gut microbiota and its role in both normal and pathological processes; then, we discuss the importance of the gut-brain axis as well as the role of oxidative stress and inflammation as mediators of the pathological processes in which dysbiosis is involved. Specific sections pertain the role of the altered gut microbiota in the pathogenesis of Alzheimer’s disease, depression, and type 2 diabetes mellitus. The therapeutic implications of microbiota manipulation are briefly discussed. Finally, a conclusion comments on the possible role of dysbiosis as a common pathogenetic contributor (via oxidative stress and inflammation) shared by the three disorders.

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  • Metal ions specifically zinc and copper may bind to the Aβ plaque and produce reactive oxygen species (ROS).

    “Metal ions specifically zinc and copper may bind to the Aβ plaque and produce ROS.”
  • ROS produced brings about oxidative change in the Aβ peptide itself making its removal difficult and also causes lipid and protein oxidation of the cell membrane making it permeable and hence susceptible to degeneration.

    “ROS thus produced brings about oxidative change in the Aβ peptide itself making its removal difficult and also cause lipid and protein oxidation of the cell membrane making it permeable and hence susceptible to degeneration [24, 29, 30].”
  • Alteration in the activity of gut microbes along with increased nitrate intake can lead to overproduction of NO, which can cause axonal degeneration, neuroinflammation and neurodegenerative disorders.

    “Alteration in the activity of any of these gut microbes along with increase nitrate intake, can lead to overproduction of NO, which can cause axonal degeneration, neuro inflammation and neurodegenerative disorders [24].”

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Authors
Luca, M., Di Mauro, M., Di Mauro, M., & Luca, A.
Affiliations
  • University of Catania (IT)
  • Department of Clinical and Experimental Medicine, University of Catania, Italy
  • Department of Biomedical and Biotechnological Sciences, University of Catania, Italy
Corresponding author
Luca, Antonina
Venue
Oxidative Medicine and Cellular Longevity
Publisher
Wiley
Published
2019-04-17
Volume
2019
Pages
1-10
ISSN
  • 1942-0994 (ISSN-L)
  • 1942-0900
OpenAlex
W2939350834
Cited by
190
References
117
Citations by year
2026: 4 · 2025: 23 · 2024: 26 · 2023: 50 · 2022: 24 · 2021: 40 · 2020: 15 · 2019: 8
FWCI
1.92
Type
journal article
Language
en
Open access
Locations
  • Oxidative Medicine and Cellular Longevity (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Health Sciences › Dentistry › Periodontics › Oral microbiology and periodontitis research
Keywords
gut microbiota, dysbiosis, Alzheimer's disease, depression, type 2 diabetes, oxidative stress, inflammation, gut-brain axis, comorbidities, microbiome manipulation, pathogenesis
MeSH terms
Gastrointestinal Microbiome, Alzheimer Disease, Depression, Diabetes Mellitus, Type 2, Humans, Oxidative Stress

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