Cited by 214Cholesterol and Lipid MetabolismAlzheimer's disease research and treatmentsLipoproteins and Cardiovascular Health

The DOI matches its Crossref record; 68 of the 68 references it cites were found in a registry or an index.

Apolipoprotein E (ApoE) Isoform-dependent Lipid Release from Astrocytes Prepared from Human ApoE3 and ApoE4 Knock-in Mice

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Abstract

We have reported previously (Michikawa, M., Fan, Q.-W., Isobe, I., and Yanagisawa, K. (2000) J. Neurochem. 74, 1008-1016) that exogenously added recombinant human apolipoprotein E (apoE) promotes cholesterol release in an isoform-dependent manner. However, the molecular mechanism underlying this isoform-dependent promotion of cholesterol release remains undetermined. In this study, we demonstrate that the cholesterol release is mediated by endogenously synthesized and secreted apoE isoforms and clarify the mechanism underlying this apoE isoform-dependent cholesterol release using cultured astrocytes prepared from human apoE3 and apoE4 knock-in mice. Cholesterol and phospholipids were released into the culture media, resulting in the generation of two types of high density lipoprotein (HDL)-like particles; one was associated with apoE and the other with apoJ. The amount of cholesterol released into the culture media from the apoE3-expressing astrocytes was approximately 2.5-fold greater than that from apoE4-expressing astrocytes. In contrast, the amount of apoE3 released in association with the HDL-like particles was similar to that of apoE4, and the sizes of the HDL-like particles released from apoE3- and apoE4-expressing astrocytes were similar. The molar ratios of cholesterol to apoE in the HDL fraction of the culture media of apoE3- and apoE4-expressing astrocytes were 250 +/- 6.0 and 119 +/- 5.1, respectively. These data indicate that apoE3 has an ability to generate similarly sized lipid particles with less number of apoE molecules than apoE4, suggesting that apoE3-expressing astrocytes can supply more cholesterol to neurons than apoE4-expressing astrocytes. These findings provide a new insight into the issue concerning the putative alteration of apoE-related cholesterol metabolism in Alzheimer's disease.

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  1. Gong, 2002, J. Neurosci. Res.
  2. Fan, 2001, J. Am. Aging Assoc., 24, 1

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Metadata

Authors
Gong, J.-S., Kobayashi, M., Hayashi, H., Zou, K., Sawamura, N., Fujita, S. C., Yanagisawa, K., & Michikawa, M.
Affiliations
Japan Society for the Promotion of Science (JP)
Corresponding author
Michikawa, Makoto
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2002-08
Volume
277
Issue
33
Pages
29919-29926
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2087083058
Cited by
214
References
68
Citations by year
2026: 5 · 2025: 6 · 2024: 8 · 2023: 4 · 2022: 10 · 2021: 10 · 2020: 11 · 2019: 13 · 2018: 6 · 2017: 3 · 2016: 8 · 2015: 6 · 2014: 7 · 2013: 9 · 2012: 6
FWCI
10.25
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Cholesterol and Lipid Metabolism
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipoproteins and Cardiovascular Health
Keywords
apolipoprotein E, APOE isoforms, APOE3, APOE ε4, astrocytes, lipid secretion, clusterin, cholesterol metabolism, Alzheimer's disease
MeSH terms
Animals, Apolipoproteins E, Astrocytes, Cells, Cultured, Humans, Protein Isoforms, Lipid Metabolism, Mice, Apolipoprotein E3, Apolipoprotein E4

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