Combined systemic elimination of MET and epidermal growth factor receptor signaling completely abolishes liver regeneration and leads to liver decompensation
Open accessAbstract
Receptor tyrosine kinases MET and epidermal growth factor receptor (EGFR) are critically involved in initiation of liver regeneration. Other cytokines and signaling molecules also participate in the early part of the process. Regeneration employs effective redundancy schemes to compensate for the missing signals. Elimination of any single extracellular signaling pathway only delays but does not abolish the process. Our present study, however, shows that combined systemic elimination of MET and EGFR signaling (MET knockout + EGFR‐inhibited mice) abolishes liver regeneration, prevents restoration of liver mass, and leads to liver decompensation. MET knockout or simply EGFR‐inhibited mice had distinct and signaling‐specific alterations in Ser/Thr phosphorylation of mammalian target of rapamycin, AKT, extracellular signal–regulated kinases 1/2, phosphatase and tensin homolog, adenosine monophosphate–activated protein kinase α, etc. In the combined MET and EGFR signaling elimination of MET knockout + EGFR‐inhibited mice, however, alterations dependent on either MET or EGFR combined to create shutdown of many programs vital to hepatocytes. These included decrease in expression of enzymes related to fatty acid metabolism, urea cycle, cell replication, and mitochondrial functions and increase in expression of glycolysis enzymes. There was, however, increased expression of genes of plasma proteins. Hepatocyte average volume decreased to 35% of control, with a proportional decrease in the dimensions of the hepatic lobules. Mice died at 15‐18 days after hepatectomy with ascites, increased plasma ammonia, and very small livers. Conclusion: MET and EGFR separately control many nonoverlapping signaling endpoints, allowing for compensation when only one of the signals is blocked, though the combined elimination of the signals is not tolerated; the results provide critical new information on interactive MET and EGFR signaling and the contribution of their combined absence to regeneration arrest and liver decompensation. (H epatology 2016;64:1711‐1724)
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MET or EGFR signalling alone can compensate for one another, but blocking both results in deficient liver regeneration and animal death after partial hepatectomy.
“While MET or EGFR signalling alone can compensate for one another, blocking both signalling pathways results in deficient liver regeneration, with respect to original liver mass, and animal death after partial hepatectomy.[127], [128], [129]”
From Distinct hepatocyte identities in liver homeostasis and regeneration (2023) · cites this paper as [129]
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Self-citationDistinct hepatocyte identities in liver homeostasis and regeneration
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- Authors
- Paranjpe, S., Bowen, W. C., Mars, W. M., Orr, A., Haynes, M. M., DeFrances, M. C., Liu, S., Tseng, G. C., Tsagianni, A., & Michalopoulos, G. K.
- Affiliations
- University of Pittsburgh (US)
- Corresponding author
- Michalopoulos, George K.
- Venue
- Hepatology
- Published
- 2016-10-01
- Volume
- 64
- Issue
- 5
- Pages
- 1711-1724
- ISSN
- 0270-9139 (ISSN-L)
- 1527-3350
- PMC
- PMC5074871
- OpenAlex
- W2528937381
- Cited by
- 115
- References
- 3
- Citations by year
- 2026: 6 · 2025: 11 · 2024: 18 · 2023: 12 · 2022: 10 · 2021: 12 · 2020: 17 · 2019: 6 · 2018: 9 · 2017: 12 · 2016: 2
- FWCI
- 6.99
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Hepatology (publishedVersion, cc-by)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Cleveland Foundation
- National Institute of Diabetes and Digestive and Kidney Diseases (P01DK096990)
- Topics
- Health Sciences › Medicine › Hepatology › Liver physiology and pathology
- Health Sciences › Medicine › Surgery › Organ Transplantation Techniques and Outcomes
- Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
- Keywords
- MET receptor tyrosine kinase, epidermal growth factor receptor, liver regeneration, hepatic decompensation, hepatectomy, EGFR inhibition, MAPK signaling, PI3K/Akt signaling, AMPK, phosphatase and tensin homolog, fatty acid metabolism, urea cycle, glycolysis, plasma proteins, hepatocyte volume, blood ammonia
- MeSH terms
- Animals, Liver Regeneration, Male, Signal Transduction, Liver Failure, Proto-Oncogene Proteins c-met, Mice, ErbB Receptors
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