Li FF, Zheng H, Xu WX, Yang XM, Wang SY. Activation of TEC and STAT3 after partial hepatectomy or hepatocytic growth factor stimulation.
Shijie Huaren Xiaohua Zazhi 2004;
12:2809-2812. [DOI:
10.11569/wcjd.v12.i12.2809]
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Abstract
AIM: To study the activation of TEC and STAT3 in the hepatocyte after partial hepatectomy (PH) or hepatocytic growth factor (HGF) stimulation in the mice.
METHODS: Mice of SPF degree and WB F-344 cell (liver stem cell line) were used in this study. In vivo and in vitro experimental models of PH and HGF stimulation were established respectively. Immunoprecipitation (IP) and immunoblotting (IB) were used to observe the phosphorylation level and time of TEC and STAT3. On the other hand, electrophoretic mobility shift assay (EMSA) was used to detect the binding ability of STAT3 DNA.
RESULTS: TEC and STAT3 were both inducibly phosphorylated in one hour after PH or HGF stimulation. Ten to twenty minutes after PH, levels of TEC and STAT3 reached the peak. About 10 min after HGF stimulation, TEC phosphorylation level reached maximum value and about 30 min STAT3 phosphorylation level reached peak value. Meanwhlie, STAT3 DNA binding activity was enhanced both In vivo and in vitro experiments.
CONCLUSION: After PH or HGF-stimulation, both TEC and STAT3 are quickly phosphorylated in one hour, and they synergically affect the early proliferation of hepatocytes.
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