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Olle Melander

Principal investigator

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Increased midlife triglycerides predict brain β-amyloid and tau pathology 20 years later

Author

  • Katarina Nägga
  • Anna-Märta Gustavsson
  • Erik Stomrud
  • Daniel Lindqvist
  • Danielle van Westen
  • Kaj Blennow
  • Henrik Zetterberg
  • Olle Melander
  • Oskar Hansson

Summary, in English

Objective To evaluate the effect of midlife lipid levels on Alzheimer brain pathology 20 years later in cognitively normal elderly individuals.
Methods This is a longitudinal cohort study of 318 cognitively normal individuals with data on fasting lipid levels at midlife (mean age 54 years). Presence of β-amyloid (Aβ) and tau pathologies 20 years later (mean age 73 years) were detected by quantifying Alzheimer disease (AD) biomarkers in CSF. In a subset (n = 134), Aβ (18F-flutemetamol) PET was also performed.
Results CSF Aβ42 and Aβ PET revealed Aβ pathology in approximately 20% of the cognitively healthy population and CSF Aβ42/phosphorylated tau (p-tau) ratio indicated both Aβ and tau pathology in 16%. Higher levels of triglycerides in midlife were independently associated with abnormal CSF Aβ42 (odds ratio [OR] 1.34, 95% confidence interval [CI] 1.03–1.75, p = 0.029) and abnormal Aβ42/p-tau ratio (OR 1.46, 95% CI 1.10–1.93; p = 0.009) adjusting for age, sex, APOE ε4, education, and multiple vascular risk factors. Triglycerides were also associated with abnormal Aβ PET in multivariable regression models, but the association was attenuated in the fully adjusted model. Increased levels of medium and large low-density lipoprotein subfractions were significantly associated with abnormal Aβ PET and large high-density lipoprotein particles were associated with decreased risk of abnormal Aβ PET.
Conclusions Increased levels of triglycerides at midlife predict brain Aβ and tau pathology 20 years later in cognitively healthy individuals. Certain lipoprotein subfractions may also be risk factors for Aβ pathology. These findings further support an involvement of lipids in the very early stages of AD development.

Department/s

  • MultiPark: Multidisciplinary research focused on Parkinson´s disease
  • Clinical Memory Research
  • Unit for clinical suicide research
  • Psychiatry (Lund)
  • Neuroradiology
  • Diagnostic Radiology, (Lund)
  • EXODIAB: Excellence in Diabetes Research in Sweden
  • EpiHealth: Epidemiology for Health
  • Cardiovascular Research - Hypertension

Publishing year

2018-01-02

Language

English

Pages

1-11

Publication/Series

Neurology

Volume

90

Issue

1

Document type

Journal article

Publisher

American Academy of Neurology

Topic

  • Neurology

Status

Published

Research group

  • Clinical Memory Research
  • Unit for clinical suicide research
  • Neuroradiology
  • Cardiovascular Research - Hypertension

ISBN/ISSN/Other

  • ISSN: 1526-632X