ZFAS1在結(jié)直腸癌中的表達(dá)及其促進(jìn)腫瘤轉(zhuǎn)移的研究
[Abstract]:The expression of the first part of the ZFAS1 in the colorectal cancer tissue and its clinical significance are to detect the expression level of the ZFAS1 in the colorectal cancer tissue and to analyze its relationship with the clinicopathological parameters and the prognosis. Methods: The expression of ZFAS1 in the tissues of colorectal cancer and the paracancerous tissues was detected by q-RT-PCR. The difference of the expression of ZFAS1 was compared, and the expression of ZFAS1 in the primary and metastatic lesions of 12 patients with colorectal cancer was detected. The relationship between the expression level of the ZFAS1 and the clinical pathological parameters was analyzed by the card-side test, the survival curve was drawn by the Kaplan-Meier method, the survival rate between the high-expression group of the ZFAS1 and the low-expression group was compared by the Log-Rank method, and the multi-factor analysis was carried out using the Cox proportional risk model. To determine the effect of the ZFAS1 on the prognosis after multi-factor correction. Results: The expression of ZFAS1 in 159 patients with colorectal cancer and its paired normal tissues showed that the expression of ZFAS1 in colorectal cancer was up-regulated (P <0001), of which 76 patients had more than 2-fold higher expression of ZF1in colorectal cancer. The expression of ZFAS1 in the liver metastasis was significantly higher than that of the primary site (P0.05). The expression of ZFAS1 in colorectal cancer was positively correlated with lymph node metastasis (P = 0.045) and TNM stage (P = 0. 003). Compared with patients with low expression of ZFAS1, the patients with high expression of ZFAS1 showed a worse prognosis with no tumor survival time (P = 0.012) and shorter overall survival time (P = 0.003). The multi-factor analysis showed that ZFAS1 was an independent prognostic factor for non-tumor survival time in patients with colorectal cancer (HR = 2.132, 95% CI = 1.015-4.546, P = 0.048) and total survival time (HR = 1.878, 95% CI = 1.006-3.529, P = 0.0492). Conclusion: ZFAS1 is highly expressed in colorectal cancer and is associated with lymph node metastasis and high TNM stage. ZFAS1 is an independent prognostic factor for tumor recurrence and death in patients with colorectal cancer. The effect of the second part of ZFAS1 on the migration and invasion of colorectal cancer cells is to study the effects of ZFAS1 on the proliferation, migration and invasion of colorectal cancer cells. Methods: The expression of ZFAS1 in colorectal cancer cell line was detected, two cell lines with higher expression were selected, and the expression of ZFAS1 was disturbed by the technique of si RNA. The effect of ZF1gene silencing on the cell migration and invasion ability of colorectal cancer cells was studied by using the cell scratch test and the Transwell invasion cell method. The lentiviral expression vector of the ZFAS1sh RNA was constructed by the molecular cloning technique. The effect of ZFAS1 gene silencing on the in vivo transfer of colorectal cancer cells was studied by using the experiment of lung transfer in the tail vein of nude mice. Results: The silencing of ZFAS1 gene has no significant effect on the proliferation of colorectal cancer cells, and the silencing of ZFAS1 can inhibit the in vitro migration and invasion ability of colon cancer cells and the lung metastasis of nude mice. Conclusion: ZFAS1 can inhibit the migration, invasion and metastasis of colorectal cancer cells. The third part of the study on the effect of ZFAS1 on the transfer mechanism of colorectal cancer is to study the mechanism of the effect of ZFAS1 on the transfer of colorectal cancer cells. Methods: The expression of EMT-related gene in colorectal cancer cells stabilized by ZFAS1 was detected by the method of q-RT-PCR and Western blot. The expression of ZEB1 was disturbed by the technique of si-RNA, and the relationship between ZEB1 and E-cadherin (E-cad) and VIM was verified. The results showed that ZEB1 is the target gene of mi R-150-5p, and the effect of mi R-150-5p and ZEB1 on the cell migration and invasion ability of colorectal cancer is studied by using cell scratch test and Transwell's invasion cell method. The relationship between ZFAS1 and mi R-150-5p was studied by cell scratch test and Transwell's invasion cell method. Results: The expression of E-cad in the cells of colorectal cancer was significantly increased after the knock-down of the ZFAS1, and the expression of VIM and ZEB1 in the interstitial cell markers decreased significantly; the expression of E-cad and VIM was regulated by ZEB1; and the expression of mi R-150-5p in the inhibition of colorectal cancer cells was inhibited by targeting the ZEB1; and the ZFAS1 was combined with mi R-150-5p. The anti-cancer effect of mi R-150-5p was closed. Conclusion: The binding of ZFl to mi R-150-5p and the inhibition of the expression of ZEB1 by mi R-150-5p, and the up-regulation of the expression of ZEB1, accelerate the process of EMT and promote the metastasis of the tumor.
【學(xué)位授予單位】:蘇州大學(xué)
【學(xué)位級別】:博士
【學(xué)位授予年份】:2016
【分類號】:R735.34
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