外分泌GRP78通過激活EGFR-Src-STAT3信號(hào)通路使肝癌細(xì)胞發(fā)生索拉非尼耐藥
[Abstract]:Objective to investigate the interaction between exocrine GRP78 and EGFR on cell membrane, and to determine the role and mechanism of exocrine GRP78 and EGFR in the production of solafenib resistance in hepatoma cells. According to the different levels of exocrine GRP78 and the mechanism of drug resistance, it is regarded as a marker of clinical diagnosis and a target of treatment. Method 1. The content of exocrine GRP78 and the expression of EGFR on the surface of hepatoma cells were analyzed by Western blot, and the appropriate cell line. 2. The serum levels of GRP78 in HCC patients and those in normal controls were analyzed by ELISA. 3. 3. To determine whether rh GRP78 affects the sensitivity of Solafenib to hepatoma cells and its mechanism at cell level. The effects of rh GRP78 on the sensitivity of hepatoma cells to Solafenil and the signal transduction pathway of drug resistance between rh GRP78 and EGFR were analyzed by using MTTX Western blottle pull down and colony formation assay. The tumor model was established at the animal level, and the animals were divided into three groups: GRP78 group, Solafenil group and rh GRP78 sorafenil group. The tumor tissues of mice were taken out for weighing and immunohistochemical examination after a period of time. The differences among the three groups were compared. Results 1.GRP78 could be secreted by HCC cells. Exocrine GRP78 promotes cell proliferation and inhibits the apoptosis induced by Solafenib. The secreted GRP78 interacts with EGFR and induces its activation 4.EGFR mediates the response of HCC cells to secreted GRP78. Conclusion GRP78 secreted by tumor cells can activate the EGFR-Src-STAT3 signaling pathway in an autocrine or paracrine manner leading to the drug resistance of HCC cells to Solafenib. And EGFR determines the response of HCC cells to exocrine GRP78
【學(xué)位授予單位】:錦州醫(yī)科大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:R735.7
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