Effects of short-term Western diet on cerebral oxidative stress and diabetes related factors in APP x PS1 knock-in mice

Christa M. Studzinski, Feng Li, Annadora J. Bruce-Keller, Sun Ok Fernandez-Kim, Le Zhang, Adam M. Weidner, William R. Markesbery, M. Paul Murphy, Jeffrey N. Keller

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

A chronic high fat Western diet (WD) promotes a variety of morbidity factors although experimental evidence for short-term WD mediating brain dysfunction remains to be elucidated. The amyloid precursor protein and presenilin-1 (APP x PS1) knock-in mouse model has been demonstrated to recapitulate some key features of Alzheimer's disease pathology, including amyloid-β (Aβ) pathogenesis. In this study, we placed 1-month-old APP x PS1 mice and non-transgenic littermates on a WD for 4 weeks. The WD resulted in a significant elevation in protein oxidation and lipid peroxidation in the brain of APP x PS1 mice relative to non-transgenic littermates, which occurred in the absence of increased Aβ levels. Altered adipokine levels were also observed in APP x PS1 mice placed on a short-term WD, relative to non-transgenic littermates. Taken together, these data indicate that short-term WD is sufficient to selectively promote cerebral oxidative stress and metabolic disturbances in APP x PS1 knock-in mice, with increased oxidative stress preceding alterations in Aβ. These data have important implications for understanding how WD may potentially contribute to brain dysfunction and the development of neurodegenerative disorders such as Alzheimer's disease.

Original languageEnglish
Pages (from-to)860-866
Number of pages7
JournalJournal of Neurochemistry
Volume108
Issue number4
DOIs
StatePublished - Feb 2009

Keywords

  • Adipokine
  • Alzheimer's disease
  • Amyloid-β
  • Protein oxidation
  • Western diet

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience

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