Cited by 971Alzheimer's disease research and treatmentsAntimicrobial Peptides and ActivitiesNeuroinflammation and Neurodegeneration Mechanisms

Amyloid-β peptide protects against microbial infection in mouse and worm models of Alzheimer’s disease

Open access
Kumar, Deepak Kumar Vijaya, Choi, Se Hoon, Washicosky, Kevin J., Eimer, William A., Tucker, Stephanie, Ghofrani, Jessica, Lefkowitz, Aaron, McColl, Gawain +3 more·2016·Science Translational Medicine

Abstract

β-Amyloid protein oligomerization and fibrillization, known to be pathogenic in Alzheimer’s disease, may play a physiological role in microbial entrapment and innate immunity.

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Integrity signals

Registry

Crossref · 10.1126/scitranslmed.aaf1059

Cites

73 of 73 references verified0 citation errors · 0 not checkable

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  • In this framework, neuroinflammatory AD symptoms are the result of Aβ oligomerization that encases pathogens following infection, sequestering them away from an opportunity to infect brain tissue.

    “In this framework, neuroinflammatory AD symptoms are the result of Aβ oligomerization that encases pathogens following infection, sequestering them away from an opportunity to infect brain tissue [105,106].”

    From What would it take to prove that a chronic infection is a causal agent in Alzheimer’s disease? (2025) · cites this paper as [106]

    The Discussion (page not provided) proposes that Aβ oligomers bind microbes and that growing fibrils can entrap them and inhibit adhesion to host cells. But it does not establish that neuroinflammatory AD symptoms result from this process following infection; it explicitly says CNS infection is not required by its model and that the role of infection in AD remains unproven. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • In the 5XFAD mouse model of AD, clearance of S. typhimurium was shown to be faster than in WT mice.

    “In the 5XFAD mouse model of AD, clearance of S. typhimurium was shown to be faster than in WT mice [106].”

    From What would it take to prove that a chronic infection is a causal agent in Alzheimer’s disease? (2025) · cites this paper as [106]

    The Results section ('Aβ protects against meningitis in genetically modified mice'; page not available in our copy) reports lower cerebral S. typhimurium loads and better survival in 5XFAD mice than in WT controls. It does not report a faster rate of bacterial clearance, so the claim goes beyond the measured finding. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Aβ is an antimicrobial peptide, released by neural cells in response to infectious agents.

    “It is now well known that Aβ is an antimicrobial peptide, released by neural cells in response to infectious agents12,13, so it is not surprising that the presence of bacteria in the brain can result in Aβ deposition reviewed in8.”

    From Chlamydia pneumoniae can infect the central nervous system via the olfactory and trigeminal nerves and contributes to Alzheimer’s disease risk (2022) · cites this paper as [13]

    The Introduction and Discussion describe Aβ’s antimicrobial activity, and the Results report that cultured human brain neuroglioma cells secrete Aβ. But the Discussion says the study’s models expressed Aβ constitutively and could not test whether infection normally increases its production; it cites other investigators’ findings only as suggesting that Aβ may be inducible. The source therefore does not establish that neural cells release Aβ in response to infectious agents. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • GMC101 nematodes have Aβ in the gut, and this amyloid is protective against a S. typhimurium infection.

    “Interestingly, GMC101 nematodes have Aβ in the gut, and this amyloid is protective against a S. typhimurium infection [106].”
  • Aβ has a physiological role in innate immunity.

    “these studies highlight a physiological role for Aβ in innate immunity”

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Research works printed but not linked: 1

  1. [63]Kagan BL Jang H Capone R Teran Arce F Ramachandran S Lal R Nussinov R Antimicrobial properties of amyloid peptides MolPharm 9 708 717 2012 PMC3297685 22081976

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Authors
Kumar, D. K. V., Choi, S. H., Washicosky, K. J., Eimer, W. A., Tucker, S., Ghofrani, J., Lefkowitz, A., McColl, G., Goldstein, L. E., Tanzi, R. E., & Moir, R. D.
Affiliations
  • Harvard University (US)
  • The University of Melbourne (AU)
  • Boston University (US)
Corresponding author
  • Kumar, Deepak Kumar Vijaya
  • Choi, Se Hoon
  • Washicosky, Kevin J.
  • Tanzi, Rudolph E.
  • Moir, Robert D.
Venue
Science Translational Medicine
Published
2016-05-25
Volume
8
Issue
340
Pages
340ra72-340ra72
ISSN
  • 1946-6234 (ISSN-L)
  • 1946-6242
OpenAlex
W2407359553
Cited by
971
References
73
Citations by year
2026: 51 · 2025: 62 · 2024: 76 · 2023: 87 · 2022: 112 · 2021: 118 · 2020: 142 · 2019: 95 · 2018: 112 · 2017: 83 · 2016: 33
FWCI
86.66
Type
journal article
Language
en
Open access
Locations
  • Science Translational Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
Funders
  • NIH (5R01AI081990-02)
  • Cure Alzheimer's Fund
  • The Helmsley Charitable Trust
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Immunology and Microbiology › Microbiology › Antimicrobial Peptides and Activities
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
amyloid-beta, Alzheimer's disease, antimicrobial peptides, antimicrobial activity, fungal infection, bacterial infection, Salmonella typhimurium, amyloid oligomerization, protofibrils, heparin-binding domain, innate immunity, 5xFAD mice, Caenorhabditis elegans, amyloidosis, sterile inflammation
MeSH terms
Alzheimer Disease, Animals, Disease Models, Animal, Female, Humans, Immunity, Innate, Mice, Transgenic, Salmonella typhimurium, Amyloid beta-Peptides, Caenorhabditis elegans, Animals, Genetically Modified, Mice

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