Cited by 77Cholesterol and Lipid MetabolismLipid metabolism and biosynthesisLipid metabolism and disorders

Nascent VLDL phospholipid composition is altered when phosphatidylcholine biosynthesis is inhibited: evidence for a novel mechanism that regulates VLDL secretion

Fast, Darren G., Vance, Dennis E.·1995·Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism

Abstract

Previous work has shown that inhibition of phosphatidylcholine biosynthesis inhibits very low density lipoprotein (VLDL) secretion by causing a decrease in the number of particles in the Golgi but not in the endoplasmic reticulum of rat liver (Verkade et al. (1993) J. Biol. Chem. 268, 24,990-24,996). One explanation for this observation was that VLDL from choline deficient livers was degraded in a post-endoplasmic reticulum compartment. This hypothesis was supported by experiments in which choline deficient (CD) or choline supplemented (CS) rat hepatocytes were incubated +/- Brefeldin A. In the presence of Brefeldin A, VLDL secretion was blocked, but no difference was observed in the degradation of apolipoprotein B (apoB) within the CD or CS cells. If increased catabolism of apoB were occurring in the endoplasmic reticulum of CD hepatocytes, enhanced degradation of apoB in CD cells might have been expected. Inhibition of phosphatidylcholine biosynthesis also caused decreases in the phosphatidylcholine content of membranes of the secretory pathway. The lipids of nascent VLDLs from the lumina of endoplasmic reticulum and Golgi prepared from CD rat liver were relatively enriched in phosphatidylethanolamine and depleted of phosphatidylcholine when compared to samples from CS liver. The changes in nascent VLDL phospholipid composition mimicked that of the organelle membranes from which the VLDLs were isolated. Possibly the phospholipid composition of the organelles is a factor in…

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Crossref · 10.1016/0005-2760(95)00116-t

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  • The CDAHFD causes hepatic steatosis by limiting the chemical building blocks necessary for VLDL production, and thus should not be salvageable by genetic means.

    “The CDAHFD causes hepatic steatosis by limiting the chemical building blocks necessary for VLDL production (5, 6), and thus should not be salvageable by genetic means.”

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Authors
Fast, D. G., & Vance, D. E.
Affiliations
University of Alberta (CA)
Corresponding author
Vance, Dennis E.
Venue
Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism
Publisher
Elsevier BV
Published
1995-09
Volume
1258
Issue
2
Pages
159-168
ISSN
0005-2760 (ISSN-L)
OpenAlex
W1976995910
Cited by
77
References
49
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 3 · 2021: 3 · 2020: 4 · 2019: 8 · 2018: 3 · 2017: 6 · 2016: 1 · 2015: 3 · 2014: 1 · 2013: 2
FWCI
2.13
Type
journal article
Language
en
Open access
closed
Locations
  • Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
Keywords
very low density lipoprotein secretion, phosphatidylcholine synthesis, phospholipid composition, choline deficiency, phosphatidylethanolamine, Golgi apparatus, endoplasmic reticulum, secretory pathway, hepatocytes, brefeldin A
MeSH terms
Animals, Apolipoproteins B, Cell Compartmentation, Choline, Endoplasmic Reticulum, Golgi Apparatus, Intracellular Membranes, Lipoproteins, VLDL, Liver, Male, Phosphatidylcholines, Rats, Sprague-Dawley, Rats

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