Cited by 29Dementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration MechanismsTryptophan and brain disorders

Longitudinal Associations Between Serum Cytokine Levels and Dementia

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Kim, Ju-Wan, Stewart, Robert, Kang, Hee-Ju, Bae, Kyung-Yeol, Kim, Sung-Wan, Shin, Il-Seon, Yoon, Jin-Sang, Kim, Jae-Min·2018·Frontiers in Psychiatry

Abstract

Background: The purpose of this study was to investigate whether long-term inflammation is related to the incidence of dementia in a prospective observational study. Methods: In total, 732 Korean community-dwelling elderly people > 65 years were evaluated at baseline. Of the 625 without dementia, 518 (83%) were followed over a 2.4-year period, and the incidence of dementia was determined. Cytokine [interleukin (IL)-1α, IL-1β, IL-6, IL-8, and tumor necrosis factor (TNF)-α] levels were measured at baseline and follow-up. The individual and combined effects of cytokine levels on dementia were evaluated after adjusting for potential covariates (lifestyle factors, demographics, disability, cognitive function, and presence of the APOE e4 allele) and a Bonferroni correction. Results: Incident dementia was associated with increased serum cytokine levels after 2 years; the association remained significant for TNF-α, IL1-α, and IL-1β concentrations even after applying a Bonferroni correction. The analysis of the combined effects of the five cytokines showed independent associations between increases in the summed number of higher cytokine levels, between baseline and follow-up. However, incident dementia was not expected based on higher baseline pro-inflammatory cytokine levels. Conclusion: Our results suggest that dementia may precede changes in serum cytokine levels and inflammatory processes, rather than resulting from elevated pro-inflammatory cytokines.

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  1. [1]American Psychiatric Association Diagnostic and Statistical Manual of Mental Disorder. 5th ed. Washington, DC: American Psychiatric Press (2013).

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Authors
Kim, J.-W., Stewart, R., Kang, H.-J., Bae, K.-Y., Kim, S.-W., Shin, I.-S., Yoon, J.-S., & Kim, J.-M.
Affiliations
  • Chonnam National University (KR)
  • King's College London (GB)
Corresponding author
Kim, Jae-Min
Venue
Frontiers in Psychiatry
Published
2018-11-19
Volume
9
Pages
606-606
ISSN
1664-0640 (ISSN-L)
OpenAlex
W2901174720
Cited by
29
References
59
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 4 · 2022: 8 · 2021: 2 · 2020: 4
FWCI
1.18
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Psychiatry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
Chonnam National University (BCRI 18018)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
dementia, serum cytokines, chronic inflammation, inflammatory cytokines, interleukin-1 alpha, IL-1β, interleukin-6, interleukin-8, TNF-α, dementia incidence, older adults, APOE ε4, cognitive function

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