MiR-106b調(diào)控靶基因Smad7通過EMT促進(jìn)食管鱗癌的侵襲和轉(zhuǎn)移
[Abstract]:Objective: to study the mechanism of tiny RNAl06b (mi R-106b) in invasion and metastasis of esophageal carcinoma and its regulatory effect on Smad7, so as to provide a new theoretical basis for clinical treatment of esophageal carcinoma. Method 1: 1. At the tissue level, immunohistochemical method was used to detect the expression of Smad7 in esophageal squamous cell carcinoma and its corresponding normal esophageal tissues, to analyze the correlation between mi R-106b and Smad7, and to explore the correlation between mi R-106b Smad7 expression and clinicopathological parameters. At the cell level, lentivirus LV-has-mir-106b and negative control virus CON238 were transfected into esophageal carcinoma cell line KYSE150, and negative control virus CON137 were transfected into KYSE450 cell line respectively. The cells were divided into up-regulation group and down-regulation group. Upregulation group: control group (KYSE150 cell group not transfected with mi R-106b) NC group (transfected random sequence group, negative control virus CON238 group) and mi R-106b group (mi R-106b transfected KYSE150 cell group); down-regulation group: control group (KYSE450 cell group not transfected with mi R-106b-inhibition) and NC-inhibitor group (transfected random sequence group), The expression level of mi R-106b Smad7 m RNA and EMT were detected by real-time fluorescent quantitative polymerase chain reaction (real-time quantitative PCR,q RT-PCR) and Western blot (Western Blot), respectively, in the negative control virus (CON137) and mi R-106b-inhibition group (KYSE450 cells transfected with mi R-106b-inhibitor). The expression levels of epithelial cadherin (E-Cadherin) and neural cadherin (N-Cadherin), The cell proliferation was detected by MTT assay, the migration ability was detected by scratch assay, the invasion ability was detected by Transwell method, and apoptosis was detected by flow cytometry. The regulatory relationship between mi R-106 and Smad7 was verified by double luciferase reporter gene experiment. Results: 1. The expression of Smad7 in esophageal squamous cell carcinoma was significantly lower than that in normal esophageal tissues (P0.05). The expression level of Smad7 was correlated with lymph node metastasis (P0.05), but not related to age, sex, differentiation, gross classification (P0.05). The expression level of Smad7m RNA and protein of mi R-106b were significantly decreased after lentivirus transfection (P0.05). The expression of E-Cadherin in mi R-106b group was significantly lower than that in NC group (P0.05). On the contrary, the expression level of Smad7 m RNA and protein were significantly increased after lentivirus transfection into mi R-106b-inhibition (P0.05), and the proliferation of esophageal cancer cells was observed. The expression of E-Cadherin in mi R-106b-inhibition group was significantly higher than that in NC-inhibitor group (P0.05) and the expression of N-Cadherin in mi R-106b-inhibition group was significantly lower than that in NC-inhibitor group (P0.05). Double luciferase reporter gene experiment confirmed that mi R-106b has direct regulatory relationship with Smad7. Conclusion: 1. Smad7 is involved in the development of esophageal carcinoma and is related to metastasis. In esophageal squamous cell carcinoma (ESCC), the expression of Smad7 protein was regulated directly. 3.mi R-106b promoted the proliferation, migration and invasion of esophageal carcinoma cells by regulating Smad7.
【學(xué)位授予單位】:新疆醫(yī)科大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:R735.1
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