Cited by 832Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Brain insulin resistance in Alzheimer's disease and related disorders: mechanisms and therapeutic approaches

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Kellar, Derek, Craft, Suzanne·2020·The Lancet Neurology

Abstract

Insulin is a peptide secreted by the pancreas and plays an important role in the regulation of glucose metabolism in peripheral tissues. Although the role of insulin in the periphery is well understood, less is known about its multifactorial role in the brain. However, emerging evidence from human and animal studies indicate that insulin influences cerebral bioenergetics, enhances synaptic viability and dendritic spine formation, and increases turnover of neurotransmitters, such as dopamine. Insulin also has a role in proteostasis, influencing clearance of the amyloid β peptide and phosphorylation of tau, which are hallmarks of Alzheimer's disease. Insulin also modulates vascular function through effects on vasoreactivity, lipid metabolism, and inflammation. Through these multiple pathways, insulin dysregulation could contribute to neurodegeneration. Thus, new approaches to restore cerebral insulin function that could offer therapeutic benefit to adults with Alzheimer's disease, vascular cognitive impairment, or related disorders are being investigated.

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  • Insulin resistance affects the clearance of amyloid-β, the hyperphosphorylation of tau, and glucose metabolism, and enhances the aberrant expression of α-synuclein.

    “In addition, insulin resistance affects the clearance of Aβ, the hyperphosphorylation of tau, and glucose metabolism and enhances the aberrant expression of α-syn.356,357”

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Authors
Kellar, D., & Craft, S.
Affiliations
Wake Forest University Health Sciences (US)
Corresponding author
Craft, Suzanne
Venue
The Lancet Neurology
Publisher
Elsevier BV
Published
2020-09
Volume
19
Issue
9
Pages
758-766
ISSN
1474-4422 (ISSN-L)
OpenAlex
W3045828365
Cited by
832
References
104
Citations by year
2026: 132 · 2025: 157 · 2024: 150 · 2023: 154 · 2022: 142 · 2021: 87 · 2020: 10
FWCI
12.51
Type
journal article
Language
en
Open access
Locations
  • The Lancet Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Aging (P30AG049638, P30AG072947)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
brain insulin resistance, Alzheimer's disease, insulin signaling, synaptic function, dendritic spine formation, dopamine turnover, proteostasis, amyloid-beta clearance, tau phosphorylation, neuroinflammation, vascular function, lipid metabolism, vascular cognitive impairment, neurodegeneration, treatment options
MeSH terms
Glucagon-Like Peptide-1 Receptor Agonists, Alzheimer Disease, Animals, Brain, Humans, Insulin, Insulin Resistance, Risk Reduction Behavior

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