Cited by 75Alzheimer's disease research and treatmentsCholesterol and Lipid MetabolismNeuroinflammation and Neurodegeneration Mechanisms

Reduction of cholesterol synthesis in the mouse brain does not affect amyloid formation in Alzheimer's disease, but does extend lifespan

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Halford, Rebekkah W., Russell, David W.·2009·Proceedings of the National Academy of Sciences

Abstract

Alterations in cellular cholesterol synthesis or content in cultured neurons affect the cleavage of amyloid precursor protein to amyloidogenic Abeta(40) and Abeta(42) peptides characteristic of Alzheimer's disease. To determine whether a decrease in cholesterol synthesis affects amyloid precursor protein processing in vivo, we crossed cholesterol 24-hydroxylase knockout mice, which exhibit a 50% reduction in brain sterol synthesis, with transgenic mice [B6.Cg-Tg(APPswe, PSEN1E9)85Dbo/J] that develop Alzheimer's disease-like pathology. Amyloid precursor protein expression and amyloid plaque deposition in the cortex and hippocampus of male and female Alzheimer's disease mice between the ages of 3 to 15 months were similar in the presence and absence of cholesterol 24-hydroxylase. A modest but statistically significant decline in insoluble Abeta(42) peptide levels was detected in the hippocampus of 12-month-old knockout/Alzheimer's disease males. The levels of insoluble Abeta(40) and Abeta(42) peptides in 15-month-old knockout/Alzheimer's disease females were also reduced slightly. Although amyloid plaque accumulation did not affect brain sterol or fatty acid synthesis rates in 24-hydroxylase WT or knockout mice, loss of one or both cholesterol 24-hydroxylase alleles increased longevity in Alzheimer's disease mice. These studies suggest that reducing de novo cholesterol synthesis in the brain will not substantially alter the course of Alzheimer's disease, but may confer a survival advantage.

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Authors
Halford, R. W., & Russell, D. W.
Affiliations
The University of Texas Southwestern Medical Center (US)
Venue
Proceedings of the National Academy of Sciences
Published
2009-03-03
Volume
106
Issue
9
Pages
3502-3506
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2061535110
Cited by
75
References
38
Citations by year
2025: 2 · 2023: 2 · 2022: 4 · 2020: 6 · 2019: 5 · 2018: 3 · 2017: 4 · 2016: 5 · 2015: 7 · 2014: 2 · 2013: 5 · 2012: 10
FWCI
6.65
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Welch Foundation (I-0971)
  • National Institutes of Health (HL20948, DK81182)
  • National Heart, Lung, and Blood Institute (HL-20948, P01HL020948)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 81182, PL1DK081182)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
cholesterol biosynthesis, cholesterol 24-hydroxylase, Alzheimer's disease, APP processing, amyloid-beta, amyloid plaques, lifespan extension, hippocampus, sex differences
MeSH terms
Cholesterol 24-Hydroxylase, Alzheimer Disease, Amyloid, Animals, Cholesterol, Female, Longevity, Male, Peptide Fragments, Steroid Hydroxylases, Mice, Knockout, Mice

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