CXCR3在結(jié)直腸癌中的表達(dá)及功能研究
[Abstract]:Objective To study the expression of CXCR3 (CXCR3-A and CXCR3-B) and its function in colorectal cancer. It is clear that its regulation in the occurrence and development of colorectal cancer will lay the foundation for finding a new target point. Methods The expression of CXCR3-A and CXCR3-B in colorectal cancer tissues and cells was detected by immunocytochemical method (IHC-P) and Western-blot. The proliferation, infiltration and migration of CXCR3-A and CXCR3-B were analyzed by using CCK-8 (Cell Counter Kit 8), Transwell's experiment and scratch test. The effects of CXCR3-A and CXCR3-B on the tumor-forming ability of colon cancer cells were analyzed by subcutaneous tumor-forming in nude mice, and the expression of Ki67 in the post-tumor tissues was detected by immunohistochemical method. Results 1. The results showed that the expression of CXCR3-A in the cancer tissues was significantly higher than that in the adjacent tissues (P 0.001), while the expression level of the CXCR3-B was significantly higher in the adjacent tissues than in the adjacent tissues (P 0.001). The clinical and pathological factors showed that the CXCR3-A and CXCR3-B had a certain relationship with the differentiation, staging and metastasis of colorectal cancer (P0.001), but not related to the tumor site of the patient (P0.05), while the expression of CXCR3-A was enhanced with the change of TNM stage. And the CXCR3-B decreased.2. Western-blot analysis showed that the CXCR3-A in the lymph node metastasis of the colon cancer was SW620 (P.001) in the lymph node of the colon cancer by the NCM460 (normal intestinal epithelial cell), the HCT116 (in situ colon cancer cell), the LS174T (in situ colon cancer cell), the SW480 (in situ colon cancer cell), the SW620 (colon cancer lymph node metastasis cell), and the LOVO cell line. The expression of LOVO (P0.01) was higher than that of in situ colon cancer cell HCT116 (P0.01), LS174T (P0.01), SW480 (P0.01) and normal intestinal epithelial cell NCM460. 3. The expression of CXCR3-A on the proliferation of HCT116 and LOVO cells in the normal colonic epithelial cells was statistically significant.3. The expression of CXCR3-A in the proliferation of HCT116 and LOVO cells was shown by the proliferation of CCK-8, and the difference was observed when the cells were grown to the next day (P0.05), and the most significant difference occurred on the third day (P0.001). Overexpression of CXCR3-B significantly inhibited the growth of the HCT116 and LOVO cells. In addition, CXCR3-A and CXCR3-B have no significant effect on the proliferation of NCM460 cells. The effects of CXCR3-A and CXCR3-B on cell proliferation showed that the overexpression of CXCR3-A significantly promoted the invasion of HCT116 (P0.01) and LOVO (P0.001) cells. Overexpression of CXCR3-B has an inhibitory effect on the invasion of HCT116 and LOVO cells, but the inhibition is not obvious. The results showed that the expression of CXCR3-A promoted the migration of HCT116 (P0.01) and LOVO (P0.001) cells, and the comparison between CXCR3-A and CXCR3-B was significantly different in the cells of NCM460 (P0.001), HCT116 (P0.001) and LOVO (P0.001). The Transwell migration experiment was consistent with the results of the scratch test. The results showed that the expression of CXCR3-A group was higher than that in the control group (P0.01), while the tumor of the overexpressing CXCR3-B group was decreased in the control group (P0.01). The results showed that the proliferation of Ki67 was higher than that in the control group (P 0.001), and the expression of the CXCR3-B tumor group was lower than that of the control group (P 0.001), indicating that the proliferation of the tumor was different from that of the CXCR3-A and the CXCR3-B. The expression of CXCR3-B was down-regulated by overexpressing the CXCR3-A, and the expression of the CXCR3-A was down-regulated by the expression of the CXCR3-B. After the CXCR3-A was overexpressed in the NCM460 cell line, we detected that the CXCR3-B was down-regulated and the difference was statistically significant (P0.001). When the CXCR3-B was overexpressed in the HCT116 (P0.01) and LOVO (P0.01) cell lines, we detected that the CXCR3-A was down-regulated. Conclusion The role of chemokine receptor 3 (CXCR3) in different stages of colorectal cancer (CRC) progression is different. CXCR3-A and CXCR3-B may interact with a competitive antagonism in colorectal cancer, and in the process of regulating colorectal cancer, the balance of the CXCR3-A/ CXCR3-B may cause the proliferation, infiltration, and migration of CRC.
【學(xué)位授予單位】:寧夏醫(yī)科大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:R735.34
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