Cited by 35Cholesterol and Lipid MetabolismAlzheimer's disease research and treatmentsNeuroscience and Neuropharmacology Research

Age-related influence of the HDL receptor SR-BI on synaptic plasticity and cognition

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Chang, Eric H., Rigotti, Attilio, Huerta, Patricio T.·2009·Neurobiology of Aging

Abstract

Dysregulated cholesterol metabolism is a major risk factor for atherosclerosis and other late-onset disorders, such as Alzheimer's disease. The scavenger receptor, class B, type I (SR-BI) is critical in maintaining the homeostasis of cholesterol and alpha-tocopherol. SR-BI binds high-density lipoproteins (HDL) and mediates the selective transfer of cholesteryl esters and alpha-tocopherol from circulating HDL to cells. SR-BI is also involved in reverse cholesterol transport from peripheral tissues into the liver. Previous studies using SR-BI genetic knockout mice indicated that the deletion of SR-BI resulted in an accelerated onset of atherosclerosis. We hypothesized that SR-BI-dependent lipid dysregulation might disrupt brain function leading to cognitive impairment. Here, we report that very old SR-BI knockout mice show deficient synaptic plasticity (long-term potentiation) in the CA1 region of the hippocampus. Very old SR-BI KO mice also display selective impairments in recognition memory and spatial memory. Thus, SR-BI influences neural and cognitive processes, a finding that highlights the contribution of cholesterol and alpha-tocopherol homeostasis in proper cognitive function.

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Crossref · 10.1016/j.neurobiolaging.2007.07.006

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Authors
Chang, E. H., Rigotti, A., & Huerta, P. T.
Affiliations
  • Cornell University (US)
  • Pontificia Universidad Católica de Chile (CL)
Corresponding author
Huerta, Patricio T.
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2009-03
Volume
30
Issue
3
Pages
407-419
ISSN
0197-4580 (ISSN-L)
OpenAlex
W2105168017
Cited by
35
References
85
Citations by year
2025: 2 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 3 · 2018: 3 · 2017: 7 · 2016: 2 · 2015: 1 · 2014: 1 · 2012: 2
FWCI
2.32
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Aging (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Allergy and Infectious Diseases (P01AI073693)
Topics
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
scavenger receptor class B type I, HDL cholesterol, cholesterol metabolism, alpha-tocopherol, synaptic plasticity, long-term potentiation, hippocampal CA1, cognitive impairment, memory impairment, atherosclerosis, Alzheimer's disease, reverse cholesterol transport, age-related cognitive decline
MeSH terms
Aging, Animals, Cholesterol, Cognition, Female, Homeostasis, Lipoproteins, HDL, Male, Mice, Inbred C57BL, Neuronal Plasticity, Organ Culture Techniques, Synapses, Receptors, Lipoprotein, Mice, Knockout, alpha-Tocopherol, Scavenger Receptors, Class B, Mice

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