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Signal transduction of platelet-induced liver regeneration and decrease of liver fibrosis
Soichiro Murata1, Takehito Maruyama2, Takeshi Nowatari3
1Department of Surgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575, Japan. soichiro@md.tsukuba.ac.jp.
International Journal of Molecular Sciences
|April 2, 2014
Summary
Platelets accelerate liver regeneration by directly stimulating hepatocytes and cooperating with liver cells. They also improve liver fibrosis by inactivating hepatic stellate cells, promoting liver health.
Area of Science:
- Hematology
- Hepatology
- Regenerative Medicine
Background:
- Platelets contain granules with growth factors and cytokines, crucial for biological responses like wound healing and tissue regeneration.
- Their role in liver regeneration and fibrosis improvement is an area of active research.
Purpose of the Study:
- To review experimental evidence on the role of platelets in accelerating liver regeneration.
- To explore the mechanisms by which platelets improve liver fibrosis.
Main Methods:
- Review of experimental studies on platelet function in liver regeneration and fibrosis.
- Analysis of signaling pathways involved in hepatocyte proliferation and hepatic stellate cell inactivation.
Main Results:
- Platelets promote liver regeneration through direct effects on hepatocytes and cooperative effects with liver sinusoidal endothelial cells and Kupffer cells.
- Platelet-derived factors activate Akt, extracellular signal-regulated kinase (ERK)1/2, and signal transducer and activator of transcription-3 (STAT3) pathways.
- Platelets improve liver fibrosis in rodent models by increasing cyclic adenosine monophosphate (cAMP) in hepatic stellate cells via adenosine, leading to collagen production decrease.
Conclusions:
- Platelets play a significant role in both liver regeneration and mitigating liver fibrosis.
- Understanding these mechanisms offers potential therapeutic strategies for liver diseases.
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