A diet enriched with plant sterols prevents the memory impairment induced by cholesterol loss in senescence-accelerated mice

Azucena Pérez-Cañamás, Sara Sarroca, Carolina Melero-Jerez, David Porquet, Joan Sansa, Shira Knafo, Jose A. Esteban, Coral Sanfeliu, Maria Dolores Ledesma

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Cholesterol reduction at the neuronal plasma membrane has been related to age-dependent cognitive decline. We have used senescent-accelerated mice strain 8 (SAMP8), an animal model for aging, to examine the association between cholesterol loss and cognitive impairment and to test strategies to revert this process. We show that the hippocampus of SAMP8 mice presents reduced cholesterol levels and enhanced amount of its degrading enzyme Cyp46A1 (Cyp46) already at 6 months of age. Cholesterol loss accounts for the impaired long-term potentiation in these mice. Plant sterol (PSE)–enriched diet prevents long-term potentiation impairment and cognitive deficits in SAMP8 mice without altering cholesterol levels. PSE diet also reduces the abnormally high amyloid peptide levels in SAMP8 mice brains and restores membrane compartmentalization of presenilin1, the catalytic component of the amyloidogenic γ-secretase. These results highlight the influence of cholesterol loss in age-related cognitive decline and provide with a noninvasive strategy to counteract it. Our results suggest that PSE overtake cholesterol functions in the brain contributing to reduce deleterious consequences of cholesterol loss during aging.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalNeurobiology of Aging
Volume48
DOIs
StatePublished - 1 Dec 2016
Externally publishedYes

Keywords

  • Aging
  • Cholesterol
  • Memory
  • Plant sterol diet
  • Presenilin1
  • SAMP8

ASJC Scopus subject areas

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

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