Cited by 52HER2/EGFR in Cancer ResearchLiver physiology and pathologyProtein Kinase Regulation and GTPase Signaling

Hepassocin activates the EGFR/ERK cascade and induces proliferation of L02 cells through the Src-dependent pathway

Gao, Ming, Zhan, Yi-Qun, Yu, Miao, Ge, Chang-Hui, Li, Chang-Yan, Zhang, Jian-Hong, Wang, Xiao-Hui, Ge, Zhi-Qiang +1 more·2014·Cellular Signalling

Abstract

Hepassocin (HPS) is a secreted protein with mitogenic activity on primary hepatocytes and protects hepatocytes from chemically-induced injury. Our previous studies showed that HPS stimulates proliferation of hepatocytes in an ERK pathway-dependent manner. However, the molecular mechanism of HPS-induced activation of the ERK pathway remains unclear. In this study, we found that HPS induced the phosphorylation of the epidermal growth factor receptor (EGFR) in the human L02 hepatocyte cell line, and this event was concomitant with the activation of the non-receptor tyrosine kinase Src. Specific inhibition of EGFR kinase activity by gefitinib or down-regulation of EGFR by specific EGFR siRNAs prevented HPS-induced activation of the ERK pathway and proliferation of L02 cells. Furthermore, inhibition of Src activity significantly blocked HPS-induced activation of the EGFR, which was suggestive of a ligand-independent transactivation mechanism of EGFR itself as well as ERK phosphorylation and proliferation of L02 cells. These results indicate that EGFR plays an important role in the mitogenic signaling induced by HPS in L02 cell lines and may further stimulate research on the role of HPS in hepatocytes within biological processes in human health and disease.

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Crossref · 10.1016/j.cellsig.2014.04.013

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  • Hepassocin increases phosphorylation of ERK1/2, leading to hepatic lipogenesis and development of hepatic steatosis.

    “Hepassocin increases the phosphorylation of ERK1/2, leading to hepatic lipogenesis and the development of hepatic steatosis [217,218].”
  • Hepassocin has mitogenic activity on hepatocytes, serving as a regulator of hepatic growth and proliferation.

    “Hepassocin has mitogenic activity on hepatocytes, serving as a regulator of hepatic growth and proliferation [218].”

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Authors
Gao, M., Zhan, Y.-Q., Yu, M., Ge, C.-H., Li, C.-Y., Zhang, J.-H., Wang, X.-H., Ge, Z.-Q., & Yang, X.-M.
Affiliations
  • Tianjin University (CN)
  • State Key Laboratory of Proteomics (CN)
Venue
Cellular Signalling
Publisher
Elsevier BV
Published
2014-10
Volume
26
Issue
10
Pages
2161-2166
ISSN
0898-6568 (ISSN-L)
OpenAlex
W2080832793
Cited by
52
References
38
Citations by year
2026: 4 · 2025: 3 · 2024: 3 · 2023: 4 · 2022: 5 · 2021: 11 · 2020: 6 · 2019: 6 · 2018: 6 · 2017: 3 · 2016: 1
FWCI
0.64
Type
journal article
Language
en
Open access
closed
Locations
  • Cellular Signalling (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
epidermal growth factor receptor, ERK signaling, Src kinase, hepatocyte proliferation, gefitinib, L02 hepatocytes, mitogenic signaling, hepatocyte growth factor
MeSH terms
Gefitinib, Cell Line, Epidermal Growth Factor, Fibrinogen, Humans, Neoplasm Proteins, Phosphorylation, Quinazolines, Recombinant Proteins, Signal Transduction, Transcriptional Activation, Down-Regulation, src-Family Kinases, RNA Interference, RNA, Small Interfering, Extracellular Signal-Regulated MAP Kinases, Cell Proliferation, ErbB Receptors

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