Cited by 418Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsDiabetes, Cardiovascular Risks, and Lipoproteins

Association of Insulin Resistance With Cerebral Glucose Uptake in Late Middle–Aged Adults at Risk for Alzheimer Disease

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Willette, Auriel A., Bendlin, Barbara B., Starks, Erika J., Birdsill, Alex C., Johnson, Sterling C., Christian, Bradley T., Okonkwo, Ozioma C., La Rue, Asenath +5 more·2015·JAMA Neurology

Abstract

IMPORTANCE: Converging evidence suggests that Alzheimer disease (AD) involves insulin signaling impairment. Patients with AD and individuals at risk for AD show reduced glucose metabolism, as indexed by fludeoxyglucose F 18-labeled positron emission tomography (FDG-PET). OBJECTIVES: To determine whether insulin resistance predicts AD-like global and regional glucose metabolism deficits in late middle-aged participants at risk for AD and to examine whether insulin resistance-predicted variation in regional glucose metabolism is associated with worse cognitive performance. DESIGN, SETTING, AND PARTICIPANTS: This population-based, cross-sectional study included 150 cognitively normal, late middle-aged (mean [SD] age, 60.7 [5.8] years) adults from the Wisconsin Registry for Alzheimer's Prevention (WRAP) study, a general community sample enriched for AD parental history. Participants underwent cognitive testing, fasting blood draw, and FDG-PET at baseline. We used the homeostatic model assessment of peripheral insulin resistance (HOMA-IR). Regression analysis tested the statistical effect of HOMA-IR on global glucose metabolism. We used a voxelwise analysis to determine whether HOMA-IR predicted regional glucose metabolism. Finally, predicted variation in regional glucose metabolism was regressed against cognitive factors. Covariates included age, sex, body mass index, apolipoprotein E ε4 genotype, AD parental history status, and a reference region used to normalize regional uptake. MAIN OUTCOMES AND MEASURES: Regional glucose uptake determined using FDG-PET and neuropsychological factors. RESULTS: Higher HOMA-IR was associated with lower global glucose metabolism (β = -0.29; P < .01) and lower regional glucose metabolism across large portions of the frontal, lateral parietal, lateral temporal, and medial temporal lobes (P < .05, familywise error corrected). The association was especially robust in the left medial temporal lobe (R2 = 0.178). Lower glucose metabolism in the left medial temporal lobe predicted by HOMA-IR was significantly related to worse performance on the immediate memory (β = 0.317; t148 = 4.08; P < .001) and delayed memory (β = 0.305; t148 = 3.895; P < .001) factor scores. CONCLUSIONS AND RELEVANCE: Our results show that insulin resistance, a prevalent and increasingly common condition in developed countries, is associated with significantly lower regional cerebral glucose metabolism, which in turn may predict worse memory performance. Midlife may be a critical period for initiating treatments to lower peripheral insulin resistance to maintain neural metabolism and cognitive function.

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  • IN insulin may support impaired brain glucose turnover in patients with AD and at-risk individuals.

    “In addition to improvements in insulin signalling, IN insulin may support impaired brain glucose turnover in patients with AD and at-risk individuals.143,144”

    From Intranasal insulin (2021) · cites this paper as [143]

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  1. [14]Willette AA Modanlo N Kapogiannis D Insulin resistance predicts medial temporal hypermetabolism in MCI conversion to Alzheimer’s disease Diabetes 2015 PMC4439566 25576061

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Authors
Willette, A. A., Bendlin, B. B., Starks, E. J., Birdsill, A. C., Johnson, S. C., Christian, B. T., Okonkwo, O. C., La Rue, A., Hermann, B. P., Koscik, R. L., Jonaitis, E. M., Sager, M. A., & Asthana, S.
Affiliations
  • Iowa State University (US)
  • University of Wisconsin–Madison (US)
  • Wisconsin Alzheimer’s Institute, University of Wisconsin School of Medicine and Public Health, Madison
Corresponding author
Bendlin, Barbara B.
Venue
JAMA Neurology
Published
2015-09-01
Volume
72
Issue
9
Pages
1013
ISSN
2168-6149 (ISSN-L)
OpenAlex
W1895530546
Cited by
418
References
69
Citations by year
2026: 37 · 2025: 36 · 2024: 35 · 2023: 38 · 2022: 36 · 2021: 46 · 2020: 42 · 2019: 34 · 2018: 26 · 2017: 41 · 2016: 36 · 2015: 11
FWCI
30.67
Type
journal article
Language
en
Open access
Locations
  • JAMA Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (UL1TR000427)
  • National Institute on Aging (R01AG037639, P50AG033514, R01AG021155, R01AG027161)
  • National Institute of General Medical Sciences (T32GM008692)
  • National Center for Research Resources (UL1RR025011)
  • National Center for Advancing Translational Sciences
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P30HD003352)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
insulin resistance, Alzheimer's disease risk, brain glucose metabolism, HOMA-IR, FDG-PET, medial temporal lobe, memory performance, insulin signaling, middle-aged adults, cognitive aging, Wisconsin Registry for Alzheimer's Prevention, APOE ε4
MeSH terms
Aged, Alzheimer Disease, Cerebral Cortex, Cognition Disorders, Cross-Sectional Studies, Diabetes Mellitus, Female, Glucose, Humans, Insulin Resistance, Male, Middle Aged, Statistics as Topic, Fluorodeoxyglucose F18, Positron-Emission Tomography, Ideal Body Weight

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