Cited by 67Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsInflammasome and immune disorders

Alzheimer's disease: Innate immunity gone awry?

VanItallie, Theodore B.·2017·Metabolism

Abstract

Inflammation is an immune activity designed to protect the host from pathogens and noxious agents. In its low-intensity form, presence of an inflammatory process must be inferred from appropriate biomarkers. Occult neuroinflammation is not just secondary to Alzheimer's disease (AD) but may contribute to its pathogenesis and promote its progression. A leaky blood-brain barrier (BBB) has been observed in early AD and may play a role in its initiation and development. Studies of the temporal evolution of AD's biomarkers have shown that, in AD, the brain's amyloid burden correlates poorly with cognitive decline. In contrast, cognitive deficits in AD correlate well with synapse loss. Oligomeric forms of amyloid-beta (oAβs) can be synaptotoxic and evidence of their deposition inside synaptic terminals of cognition-associated neurons explains early memory loss in AD better than formation of extracellular Aβ plaques. Among innate immune cells that reside in the brain, microglia sense danger signals represented by proteins like oAβ and become activated by neuronal damage such as that caused by bacterial endotoxins. The resulting reactive microgliosis has been implicated in generating the chronic form of microglial activation believed to promote AD's development. Genome-wide association studies (GWASs) have yielded data from patients with sporadic AD indicating that its causes include genetic variation in the innate immune system. Recent preclinical studies have reported that β-hydroxybutyrate (βOHB) may protect the brain from the adverse effects of both the nucleotide-binding oligomerization domain (NOD)-like receptor protein 3 (NLRP3) inflammasome and the deacetylation of histone. Consequently, there is an urgent need for clinical investigations designed to test whether an orally administered βOHB preparation, such as a ketone ester, can have a similar beneficial effect in human subjects.

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Crossref · 10.1016/j.metabol.2017.01.014

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  • There is a strong non-genetic contribution to the risk of neurodegenerative diseases, which is poorly understood.

    “Genetics affects the risk of these diseases, but there is a strong non-genetic contribution to the risk, which is poorly understood [1, 2].”

    From The endotoxin hypothesis of neurodegeneration (2019) · cites this paper as [1]

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Authors
VanItallie, T. B.
Affiliations
Columbia University Irving Medical Center (US)
Corresponding author
VanItallie, Theodore B.
Venue
Metabolism
Publisher
Elsevier BV
Published
2017-04
Volume
69
Pages
S41-S49
ISSN
0026-0495 (ISSN-L)
OpenAlex
W2578684919
Cited by
67
References
61
Citations by year
2026: 2 · 2025: 4 · 2024: 5 · 2023: 6 · 2022: 4 · 2021: 7 · 2020: 8 · 2019: 8 · 2018: 12 · 2017: 11
FWCI
1.03
Type
journal article
Language
en
Open access
closed
Locations
  • Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
Collège International de Recherche Servier (CIRS)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
Alzheimer's disease, neuroinflammation, innate immunity, microglial activation, reactive microgliosis, amyloid-beta oligomers, synaptotoxicity, synaptic loss, NLRP3 inflammasome, beta-hydroxybutyrate, ketone esters, histone deacetylation, endotoxin, genetic risk factors
MeSH terms
Acetylation, Aged, Aged, 80 and over, Alzheimer Disease, Animals, Astrocytes, Blood-Brain Barrier, Hippocampus, Histones, Humans, Immunity, Innate, Mitochondria, Protein Processing, Post-Translational, Synapses, Neuroimmunomodulation, Exercise, Microglia, Disease Progression, Adaptive Immunity, Inflammasomes

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