Reduction of β-amyloid and γ-secretase by calorie restriction in female Tg2576 mice

Marissa J. Schafer, Melissa J. Alldred, Sang Han Lee, Michael E. Calhoun, Eva Petkova, Paul M. Mathews, Stephen D. Ginsberg

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


Research indicates that female risk of developing Alzheimer's disease (AD) is greater than that of males. Moderate reduction of calorie intake, known as calorie restriction (CR), reduces pathology in AD mouse models and is a potentially translatable prevention measure for individuals at-risk for AD, as well as an important tool for understanding how the brain endogenously attenuates age-related pathology. Whether sex influences the response to CR remains unknown. In this study, we assessed the effect of CR on beta-amyloid peptide (Aβ) pathology and hippocampal CA1 neuron specific gene expression in the Tg2576 mouse model of cerebral amyloidosis. Relative to ad libitum (AL) feeding, CR feeding significantly reduced hippocampal Aβ burden in 15-month-old female, but not age-matched male, Tg2576 mice. Sustained CR also significantly reduced expression of presenilin enhancer 2 (Psenen) and presenilin 1, components of the γ-secretase complex, in Tg2576 females. These results indicate that long-term CR significantly reduces age-dependent female Tg2576 Aβ pathology, which is likely to involve CR-mediated reductions in γ-secretase-dependent amyloid precursor protein (APP) metabolism.

Original languageEnglish (US)
Pages (from-to)1293-1302
Number of pages10
JournalNeurobiology of aging
Issue number3
StatePublished - Mar 1 2015


  • Abeta
  • Aging
  • Alzheimer's disease
  • Amyloid-beta precursor protein
  • CA1 pyramidal neurons
  • Calorie restriction
  • Entorhinal cortex
  • Hippocampus
  • Microarray
  • Mouse model
  • QPCR

ASJC Scopus subject areas

  • Clinical Neurology
  • Geriatrics and Gerontology
  • Aging
  • Neuroscience(all)
  • Developmental Biology


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