三陰性乳腺癌中TOP2A、EGFR和Ⅳ型膠原的量子點探針影像技術(shù)檢測及價值研究
[Abstract]:Breast cancer is the most common malignant tumor in women. The incidence of breast cancer is increasing year by year, and it has become the most important malignant tumor leading to female death. However, the mechanism of invasion and metastasis of triple-negative breast cancer is still unclear, and there is no clinically recognized molecular targeted marker with predictive value of prognosis. A large number of scholars have explored its feasibility in cancer diagnosis, molecular typing, treatment and prognosis evaluation, and found that it has broad prospects in basic and clinical research of cancer, especially quantum dot-based immuno fluorescent imaging and quantitative analysis system. The development of system, QD-IIQAS, has made it widely used in the detection of molecular markers of malignant tumors. With the advantage of quantum dot nanotechnology, topoisomerase 2 alpha (TOP2A), epidermal growth factor receptor (EGFR) and collagen IV in triple-negative breast cancer tissues were detected. The feasibility of the assay was explored and compared with the traditional immunohistochemical assay (IHC). The molecular targets of chemosensitivity of triple-negative breast cancer were preliminarily found by the detection of three molecular markers, such as EGFR and swelling on the surface of cancer cells. Combined analysis of major components of tumor microenvironment (e.g. collagen type IV) to explore whether invasion and metastasis of triple-negative breast cancer are independent behaviors of cancer cells and whether the involvement of tumor microenvironment is necessary provides new ideas for the study of mechanisms of invasion and metastasis of malignant tumors. The ratio of collagen type IV to collagen type IV was used to explore the biological behavior of triple-negative breast cancer and provide theoretical basis and clinical inspiration for promoting the individual treatment of triple-negative breast cancer. The expression and value of TOP2A in sexual breast cancer tissues Chemotherapy is mainly anthracycline and purple shirt chemotherapeutics. At present, its therapeutic effect has reached a bottleneck, and new breakthroughs are particularly difficult. TOP2A is an important enzyme in DNA replication, and also a cytotoxic chemotherapeutics, such as anthracycline targeting molecules, has been widely studied in the field of breast cancer. The existence of these methods and the difference of different positive thresholds are inconsistent in predicting the efficacy and prognostic value of TOP2A in breast cancer patients. Our previous studies have confirmed the significant advantages of quantum dot nanotechnology in quantitative detection of biomarkers and compared it with traditional IHC. The advantages of sub-point labeling probe technique in breast cancer research, especially QD-IIQAS technique, were studied in situ fluorescence imaging and quantitative detection of TOP2A in triple-negative breast cancer tissues to study the relationship between the expression of TOP2A and the main clinicopathological parameters. The expression of TOP2A was detected and compared with the two methods. The relationship between the expression of TOP2A and the main clinicopathological parameters was also evaluated. QD-IIQAS is a simpler and more accurate method for the detection of TOP2A. Our study is to investigate the expression of TOP2A and the sensitivity of anthracycline drugs in the future. Part 2 Quantum dot-labeled double-color fluorescence imaging and quantitative detection and prognostic value of EGFR and collagen IV in triple-negative breast cancer tissue. Triple-negative breast cancer is a special subtype of breast cancer with obvious heterogeneity and poor prognosis. And metastasis is not entirely a spontaneous process of cancer cells, it requires cancer cells to penetrate the surrounding extracellular matrix barrier. In order to study the mechanism of invasion and metastasis of triple-negative breast cancer, a new detection method is developed, which can simultaneously study important components in the tumor microenvironment and important molecular markers on the surface of cancer cells. We used quantum dot multispectral fluorescence imaging to study triple-negative breast cancer tissues. Based on the first part of the single-label quantum dot immunofluorescence imaging and quantitative detection system, we developed a new computer-aided quantum dot multispectral fluorescence imaging and quantitative detection technology. We calculated the ratio of EGFR to collagen IV and studied the independent prognostic value of EGFR to collagen IV in triple-negative breast cancer patients. The expression of EGFR and collagen IV in breast cancer tissues was negatively correlated with the expression of collagen IV. The 5-year disease-free survival rate was significantly different between the high EGFR/IV collagen ratio group and the low EGFR/IV collagen ratio group. The ratio of EGFR to collagen type IV was more sensitive to the prognostic differences in patients with triple negative breast cancer than the expression of EGFR alone. To explore the mechanism of invasion and metastasis of three negative breast cancer provides a new perspective.
【學位授予單位】:武漢大學
【學位級別】:博士
【學位授予年份】:2016
【分類號】:R737.9
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