Cited by 87Liver physiology and pathologyDrug-Induced Hepatotoxicity and ProtectionCytokine Signaling Pathways and Interactions

Concanavalin A-induced liver injury triggers hepatocyte proliferation.

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Trautwein, C, Rakemann, T, Malek, N P, Plümpe, J, Tiegs, G, Manns, M P·1998·Journal of Clinical Investigation

Abstract

Concanavalin A (Con A) injection into mice leads to immune-mediated liver injury. We studied whether after Con A-induced liver injury, TNF- and IL-6-dependent signaling pathways known to be related to hepatocyte proliferation are activated. 2 h after Con A injection, maximum TNF-alpha, and after 4-8 h, maximum IL-6 serum levels were found. The rise in aminotransferases and DNA fragmentation started after 4 h; maximum levels were evident after 8 h. 5-Bromo-2'-deoxyuridine staining and nuclear cyclin A expression as markers of the S-phase were first detected in hepatocyte nuclei after 24 h, peaking after 48 h. An increase in TNF-dependent nuclear expression of CCAAT/enhancer-binding protein-beta (C/EBP-beta)/liver-enriched activating protein (LAP) was detected after 1 h, whereas an increase in RNA expression was evident only after 4 h. C/EBP-beta/LAP expression returned to normal values before progression into the S-phase. DNA binding of signal transducer and activator of transcription (STAT) 3/acute phase response factor (APRF) increased for up to 8 h. As found by supershift experiments, in addition to STAT3/APRF, STAT1 also binds to the same sequence. During the course of time gel shift experiments, DNA binding of the apoptosis-related STAT1 started earlier than DNA binding of STAT3/APRF, which regulates hepatocyte proliferation. However, the subsequent decrease in DNA binding of both factors was comparable. This study demonstrates that after Con A injection, TNF- and IL-6- dependent signals trigger nuclear events regulating hepatocyte apoptosis and proliferation during liver injury.

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Crossref · 10.1172/jci504

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Authors
Trautwein, C., Rakemann, T., Malek, N. P., Plümpe, J., Tiegs, G., & Manns, M. P.
Affiliations
  • Medizinische Hochschule Hannover (DE)
  • Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
Venue
Journal of Clinical Investigation
Published
1998-05-01
Volume
101
Issue
9
Pages
1960-1969
ISSN
0021-9738 (ISSN-L)
OpenAlex
W1964156956
Cited by
87
References
40
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 1 · 2022: 1 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 2 · 2016: 1 · 2015: 3 · 2014: 2 · 2013: 3
FWCI
4.90
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (submittedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Drug-Induced Hepatotoxicity and Protection
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
Keywords
concanavalin A, immune-mediated liver injury, hepatocyte proliferation, hepatocyte apoptosis, TNF-α, interleukin-6, STAT3, STAT1, cyclin A, S phase, transaminases, DNA fragmentation, liver injury
MeSH terms
Animals, Cell Cycle, Cell Nucleus, Concanavalin A, DNA-Binding Proteins, Liver, Liver Regeneration, Male, Mice, Inbred BALB C, Nuclear Proteins, Protein Binding, Tumor Necrosis Factor-alpha, Signal Transduction, Trans-Activators, Interleukin-6, Apoptosis, CCAAT-Enhancer-Binding Proteins, STAT3 Transcription Factor, Mice

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