活性氧影響上皮性卵巢癌轉(zhuǎn)移及其機(jī)理研究
[Abstract]:Background: epithelial ovarian cancer (epithelial ovarian carcinoma,EOC) is a malignant tumor from ovarian epithelial tissue, which accounts for the third highest incidence of malignant tumor of female reproductive system. The malignant degree was high and it was not easy to detect early. 75% of the patients were in FIGO III stage or IV stage, which was the female reproductive system tumor with the highest mortality. Reactive oxygen species (reactive oxygen species,ROS) is the product of aerobic respiration in eukaryotic cells, which is naturally produced by normal cell metabolism and formed by oxygen molecules. Oxygen molecule (molecularoxygen) is necessary for ATP production through aerobic metabolism of mitochondria. The rapid growth and proliferation of tumor cells can lead to a surge in oxygen demand. At the same time, it is in a hypoxia environment because of the consumption of oxygen supply. The modification metabolism of tumor cells mainly depends on glycolysis and the decrease of aerobic respiration. Therefore, oxygen consumption promotes the immortality of tumor cells and directly acts on the growth of neovascularization to promote tumor growth. A large number of studies have shown that ROS is related to the occurrence, development and metastasis of tumors. 2, including participation in complex processes such as epithelial mesenchymal transformation (epithelial mesenchymaltransition,EMT), has become a hot research topic in basic medicine and life science. However, it is still unclear whether ROS is involved and its mechanism in patients with ovarian cancer. E-cadherin (E-cad) is the iconic molecule of epithelial mesenchyma change (epithelial-mesenchymaltransition,EMT) type I, which is known as E-cadherin (E cadherin, E cadherin). It can maintain the tight junction between cells and prevent the invasion and metastasis and diffusion of cell activity. 3. At present, in the tumor metastasis pathway, some scholars have suggested that HIF-1 偽 and LOX may be the upstream molecules of E-cadherin 4, 5. Therefore, this study boldly hypothesized and verified that HIF-1 偽 and LOX are involved in ROS-mediated mesenchymal transformation pathway in ovarian cancer. Objective: to detect the corresponding EOC E-cadherin level under the condition of adjusting ROS level, to study whether ROS level affects the occurrence of EOC EMT, and to further explore its mechanism. That is, whether ROS mediates the high expression of HIF-1 偽, thus upregulating LOX, and promoting the metastasis of tumor cells by inhibiting E-cadherin and other mediating EMT to transform tumor cells into epithelial mesenchyma, enhance the invasiveness of tumor cells and promote the metastasis of tumor cells. It provides a new theoretical basis for the metastasis mechanism of epithelial ovarian cancer. Methods: the study was divided into four parts. The first two parts were based on human epithelial ovarian cancer cell line SKOV-3 to explore the relationship between ROS level and EOC metastasis. The expression of HIF-1 偽 and LOX, were inhibited by SiRNA gene silencing technique, and the expression of HIF-1 偽, LOX, E-cadherin protein and mRNA were detected, and the possible molecular mechanism was speculated. In the third part, based on the animal experiment, the tumor formation difference between emodin single drug and control group without drug intervention was analyzed, and the protein Immunohistochemical test of EMT marker E-cadherin was carried out. To verify the relationship between reactive oxygen species (Ros) and epithelial mesenchymal changes and tumor metastasis. In the fourth part, the clinical data of patients with ovarian cancer were analyzed, and the collected samples were studied by immunohistochemistry of E-cadherin protein. Conclusion: E-cadherin in clinical specimens is closely related to the stage of ovarian cancer. Based on the above four parts of the experiment, we obtain the following pathway speculation: epithelial ovarian cancer ROS-HIF-1 偽-LOX-E-cadherin-tumor cells develop EMT-- invasive tumor metastasis-tumor metastasis
【學(xué)位授予單位】:上海交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:R737.31
【共引文獻(xiàn)】
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