Lack of hepatic c-Met and gp130 expression is associated with an impaired antibacterial response and higher lethality after bile duct ligation
pmid: 22986785
Lack of hepatic c-Met and gp130 expression is associated with an impaired antibacterial response and higher lethality after bile duct ligation
The prognosis of liver failure is often determined by infectious and cholestatic complications. As HGF/c-Met and interleukin (IL)-6/gp130 control hepatic cytoprotective pathways, we here investigated their cooperative role during the onset of cholestatic liver injury. Conditional hepatocyte-specific ((Δhepa)) c-Met, gp130 and c-Met/gp130 knockout mice (Cre-loxP system) were subjected to bile duct ligation (BDL) and lipopolysaccharide (LPS) stimulation. gp130(Δhepa) and c-Met/gp130(Δhepa) mice displayed increased lethality associated with severe bacteraemia early after BDL, whereas c-Met(Δhepa) and wild-type mice showed normal survival. Analysis of the innate immune response and the regulation of hepatic antibacterial pathways showed that the LPS-triggered hepatocellular response via the Toll-like receptor-4 pathway was regulated differentially by HGF/c-Met and IL-6/gp130. Activation of p38MAPK, c-Jun N-terminal kinase and signalling transducer and activator of transcription-3 was impaired in gp130(Δ) and c-Met(Δhepa) livers. In addition, the acute-phase response (APR) was reduced in c-Met(Δhepa) livers, whereas gp130(Δhepa) displayed a completely abolished APR. In contrast, TNF-α-dependent NF-κB activation was enhanced in gp130(Δhepa) and c-Met(Δhepa) mice and it was associated with a higher rate of apoptosis and inflammation. Moreover, expression of the neutrophil produced and secreted cathelin-related antimicrobial peptide and of genes related to the inflammasome complex correlated with the strength of the bacterial infection and with TNF-α expression. In conclusion, Gp130 and c-Met are involved in the hepatic antibacterial and innate immune response, control the APR and thus prevent sepsis and liver injury during cholestatic conditions.
- RWTH Aachen University Germany
- Universitätsklinikum Aachen Germany
Lipopolysaccharides, Mice, Knockout, Cholestasis, Apoptosis, Bacteremia, Kaplan-Meier Estimate, Bacterial Load, Immunity, Innate, Mice, Ki-67 Antigen, Liver, Cathelicidins, Myeloid Differentiation Factor 88, Cytokine Receptor gp130, Animals, Bile Ducts, Acute-Phase Reaction, Ligation, Antimicrobial Cationic Peptides, Cell Proliferation
Lipopolysaccharides, Mice, Knockout, Cholestasis, Apoptosis, Bacteremia, Kaplan-Meier Estimate, Bacterial Load, Immunity, Innate, Mice, Ki-67 Antigen, Liver, Cathelicidins, Myeloid Differentiation Factor 88, Cytokine Receptor gp130, Animals, Bile Ducts, Acute-Phase Reaction, Ligation, Antimicrobial Cationic Peptides, Cell Proliferation
21 Research products, page 1 of 3
- 2017IsRelatedTo
- 2017IsRelatedTo
- 2017IsRelatedTo
- 2017IsRelatedTo
- 2019IsRelatedTo
- 2017IsRelatedTo
- 2017IsRelatedTo
- 2017IsRelatedTo
- 2017IsRelatedTo
- 2017IsRelatedTo
chevron_left - 1
- 2
- 3
chevron_right
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).11 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10%
