Cited by 304Liver physiology and pathologyDrug-Induced Hepatotoxicity and ProtectionLiver Disease Diagnosis and Treatment

Induction of beta-platelet-derived growth factor receptor in rat hepatic lipocytes during cellular activation in vivo and in culture.

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Wong, L, Yamasaki, G, Johnson, R J, Friedman, S L·1994·Journal of Clinical Investigation

Abstract

A consistent response to liver injury is the activation of resident mesenchymal cells known as lipocytes (Ito, fat-storing cells) into a proliferating cell type. In cultured lipocytes, platelet-derived growth factor (PDGF) is the most potent proliferative cytokine, but requires the activation-dependent expression of its receptor protein (Friedman, S. L., and M. J. P. Arthur. 1989. J. Clin. Invest. 84:1780-1785); the role of PDGF receptor (PDGFR) in liver injury is unknown. We have examined PDGFR gene expression in freshly isolated lipocytes during liver injury and correlated these findings with a culture model of cellular activation. Whereas lipocytes from normal rats had no detectable transcript for the beta-PDGFR subunit, this mRNA was induced within 1 h after a dose of carbon tetrachloride (CCl4). In contrast, alpha subunit mRNA was detected in normal cells, but was unchanged after liver injury. Similar results were observed in lipocytes from bile duct-obstructed rats, although beta-PDGFR induction was less marked. By immunoblot, induction of beta-PDGFR protein in lipocytes isolated from CCl4-treated animals correlated with mRNA increases. In contrast to lipocytes, endothelial cells from normal liver expressed low levels of alpha- and beta-receptor subunit mRNA, which did not increase with injury. Using a beta-PDGFR antibody, receptor protein could be identified within fibrotic septa in CCl4-treated animals in regions where cells expressed proliferating cell nuclear antigen (PCNA). In cultured lipocytes activated by growth on uncoated plastic, beta-PDGFR transcripts appeared within 3 d after plating, which coincided with the onset of cellular proliferation. In contrast, quiescent cells in suspension culture had no detectable beta-PDGFR mRNA. These results indicate that beta-PDGF receptor induction by lipocytes is an early event during hepatic injury in vivo and in primary culture.

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Authors
Wong, L., Yamasaki, G., Johnson, R. J., & Friedman, S. L.
Affiliations
San Francisco General Hospital (US)
Venue
Journal of Clinical Investigation
Published
1994-10-01
Volume
94
Issue
4
Pages
1563-1569
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2155815716
Cited by
304
References
49
Citations by year
2026: 3 · 2025: 2 · 2024: 4 · 2023: 11 · 2022: 2 · 2021: 17 · 2020: 5 · 2019: 11 · 2018: 10 · 2017: 11 · 2016: 6 · 2015: 18 · 2014: 17 · 2013: 10 · 2012: 7
FWCI
4.66
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Heart Association
  • University of Washington
  • National Institutes of Health (2p30am026743-06)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 43422, DK37340, R01DK037340)
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Drug-Induced Hepatotoxicity and Protection
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
Keywords
PDGFR, hepatic stellate cells, liver injury, carbon tetrachloride, biliary obstruction, liver fibrosis, cell activation, cell proliferation, endothelial cells
MeSH terms
Animals, Base Sequence, Cell Division, Cells, Cultured, Common Bile Duct, Constriction, Pathologic, Endothelium, Fibrosis, Gene Expression Regulation, Liver, Molecular Sequence Data, RNA, Messenger, Rats, Sprague-Dawley, Receptors, Platelet-Derived Growth Factor, Adipocytes, Rats

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