Cited by 693Lipid metabolism and disordersCholesterol and Lipid MetabolismLipoproteins and Cardiovascular Health

Remnant lipoprotein metabolism: key pathways involving cell-surface heparan sulfate proteoglycans and apolipoprotein E

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Mahley, Robert W., Ji, Zhong-Sheng·1999·Journal of Lipid Research

Abstract

The plasma clearance of intestinally derived remnant lipoproteins by the liver is a process that likely involves three steps. Our model suggests that the initial rapid clearance by the liver begins with sequestration of the remnants within the space of Disse, where apolipoprotein E secreted by hepatocytes enhances remnant binding and uptake. Heparan sulfate proteoglycans (HSPG), which are also abundant in the space of Disse, mediate this enhanced binding. Next, the remnants undergo further processing in the space of Disse by hepatic and lipoprotein lipases, which may also serve as ligands mediating remnant uptake. The final step, endocytosis by hepatocytes, appears to be mediated, at least in part, by the low density lipoprotein (LDL) receptor and by the LDL receptor-related protein (LRP). Cell-surface HSPG play a critical role in remnant uptake, not only in the important initial sequestration or capture step in the space of Disse, but also as an essential or integral component of the HSPG-LRP pathway. In addition, HSPG appear to function alone as a receptor and display unique handling properties for specific isoforms of apolipoprotein E.

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Crossref · 10.1016/s0022-2275(20)33334-4

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Authors
Mahley, R. W., & Ji, Z.-S.
Affiliations
University of California, San Francisco (US)
Corresponding author
Mahley, Robert W.
Venue
Journal of Lipid Research
Publisher
Elsevier BV
Published
1999-01
Volume
40
Issue
1
Pages
1-16
ISSN
0022-2275 (ISSN-L)
OpenAlex
W2150436995
Cited by
693
References
132
Citations by year
2026: 16 · 2025: 15 · 2024: 9 · 2023: 16 · 2022: 15 · 2021: 20 · 2020: 15 · 2019: 17 · 2018: 20 · 2017: 12 · 2016: 15 · 2015: 22 · 2014: 27 · 2013: 26 · 2012: 23
FWCI
34.41
Type
journal article
Language
en
Open access
Locations
  • Journal of Lipid Research (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health (5p01hl047660-10)
  • National Heart, Lung, and Blood Institute (HL-41633, P01HL041633, HL-47660)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
Keywords
heparan sulfate proteoglycans, apolipoprotein E, space of Disse, lipoprotein lipase, hepatic lipase, LDL receptor, LDL receptor-related protein, endocytosis, hepatocytes, intestinal lipoproteins
MeSH terms
Alzheimer Disease, Animals, Apolipoproteins E, Biological Transport, Active, Cell Membrane, Chylomicrons, Endocytosis, Humans, Hyperlipoproteinemia Type III, Lipase, Lipoprotein Lipase, Lipoproteins, Liver, Receptors, Immunologic, Receptors, LDL, Heparan Sulfate Proteoglycans, Low Density Lipoprotein Receptor-Related Protein-1

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