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Absence of expression of interleukin-6 (IL-6) mRNA in regenerating rat liver
Abstract:
The serum level of IL-6 and expression of IL-6 mRNA in hepatocytes from regenerating liver were investigated in the rat. The IL-6 level in the serum was not significantly different from that of a control group of rats submitted to an acute experimental inflammation. IL-6 mRNA expression did not occur in the liver of hepatectomized rats as judged from Northern blotting experiments using an IL-6 riboprobe. These results suggest that if IL-6 is implicated in hepatic regeneration, this cytokine is not produced by the regenerating liver and must be delivered exogenously to the liver to modulate hepatic regeneration.
Insights
Interleukin-6 (IL-6) is not produced by regenerating rat livers. Exogenous delivery of this cytokine may be necessary to modulate hepatic regeneration, suggesting IL-6
Area of Science:
- Hepatology
- Molecular Biology
- Immunology
Background:
- Hepatic regeneration is a complex process.
- Interleukin-6 (IL-6) is a cytokine implicated in liver regeneration.
- The source of IL-6 during liver regeneration is not fully understood.
Purpose of the Study:
- To investigate the serum levels of IL-6.
- To examine the expression of IL-6 mRNA in hepatocytes during liver regeneration in rats.
Main Methods:
- Rat models undergoing hepatectomy (liver resection).
- Measurement of serum IL-6 levels.
- Northern blotting to detect IL-6 mRNA expression in liver tissue.
Main Results:
- Serum IL-6 levels in regenerating livers were not significantly different from control rats with acute inflammation.
- IL-6 mRNA expression was not detected in the regenerating livers of hepatectomized rats via Northern blotting.
Conclusions:
- The regenerating liver does not appear to be a source of IL-6.
- If IL-6 plays a role in hepatic regeneration, it likely requires exogenous delivery to the liver.