ATP5A1在大腸癌中的表達及其臨床意義
[Abstract]:Background and purpose of the study: Colorectal cancer (CRC), an alias of colorectal cancer, is a disease with high morbidity and mortality in the world. It is the fifth most common tumor in the world, the third largest global tumor-related cause of death[1], and the five-year survival rate is less than 65%. In general, the patient is in the advanced stage at the time of diagnosis, so that the success rate of the treatment is greatly limited. A study showed that 25% of patients had been transferred[2] at the time of diagnosis. The early diagnosis of the disease is of great value to the improvement of the quality of the patient's life. Therefore, a tumor marker with high sensitivity and specificity is needed to realize early detection, early diagnosis and early treatment of colorectal cancer. By using the proteomics of two-dimensional chromatography and mass spectrometry, it can be found that the difference between the expression of the proteins in the cancer tissues and the corresponding adjacent tissues is a powerful technical support for us to search for new markers. In this study, by means of two-dimensional chromatography and mass spectrometry, the expression of the protein between the colorectal cancer and the adjacent tissue is analyzed, and the differential protein expression profile of the colorectal cancer is constructed, and it is expected to select a high-value marker for the diagnosis and treatment of the large intestine cancer. Methods: The main part of this study was as follows:1. The differential protein spectrum of colorectal cancer and corresponding adjacent tissues was established by two-dimensional chromatography and mass spectrometry. method:1) selecting a cancer tissue of a large intestine cancer and a corresponding adjacent tissue sample to extract the tissue protein, 2) The expression of the differentially expressed proteins in the cancer tissues and the corresponding adjacent tissues was detected by two-dimensional chromatography and mass spectrometry. To verify the expression of CYP5A1 in colorectal cancer. Methods: The expression of target protein A5A1 in colorectal cancer and adjacent tissues was confirmed by Western Blot method. The relationship between the expression of CYP5A1 and clinical data in patients with colorectal cancer. Methods:1) The clinical and pathological data were established from the age, sex, TNM stage of the patient and the presence or absence of distant metastasis. Results:1. 2. Western Blot showed that the expression of CYP5A1 in the tissues of colorectal cancer was significantly higher than that of the adjacent tissues. The results of the first partial proteomics are further validated. The positive expression of Astragalus 5A1 in the carcinoma of the large intestine is mainly expressed in the cytoplasm and the cell membrane, while in the corresponding adjacent tissues, the expression of the negative expression is negative. In 20 cases of colorectal cancer,7 cases of H5A1 protein were positive, and the positive rate was 35%; in 20 of the 20 corresponding adjacent tissues, no positive expression was found. The expression of CYP5A1 in colorectal cancer was significantly higher than that of the corresponding adjacent tissues, and the difference was statistically significant (p0.05). The expression of the CYP5A1 protein was related to the TNM stage and distant metastasis of the colorectal cancer tissue, and was highly correlated with the level of CEA expression in the serum of the patient (p0.05). However, it was not related to the age, sex, clinical diagnosis and differentiation of the patient (p0.05). Conclusion:1. The expression of CYP5A1 in colorectal cancer was significantly higher than that of the adjacent tissues. The expression of the A5A1 protein was related to the TNM stage and distant metastasis of the colorectal cancer tissues, and was highly correlated with the level of CEA expression in the serum of the patient. 3. A5A1 plays an important role in the tumorigenesis and progression of the large intestine, and has a certain value for the diagnosis of the degree of malignancy of the large intestine, and lays the foundation for further study.
【學位授予單位】:吉林大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:R735.34
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