Objective: To investigate the expression of Tbx2 protein in pancreatic cancer tissues and its molecular regulation mechanism by Wnt/β-catenin signaling. Methods: 49 pancreatic cancer and 13 non-cancer tissue specimen...Objective: To investigate the expression of Tbx2 protein in pancreatic cancer tissues and its molecular regulation mechanism by Wnt/β-catenin signaling. Methods: 49 pancreatic cancer and 13 non-cancer tissue specimens were obtained and examined the expression of Tbx2, and the correlation between the expression of Tbx2 and clinicopathological parameters was analyzed. The immunohistochemistry, immunocytochemistry, RT-PCR and Western blot assay methods were used to detect the changes of expression levels of β-catenin and Tbx2. Results: Tbx2 was amplified in 34 of 49 pancreatic cancers, and in 13 non-cancer tissues, only one sample amplified. The further study demonstrated that Tbx2 had a significant positive correlation with tumor differentiation degree and clinical stage, but it did not relate to the sex, age and the disease region. Inhibi-tion of β-catenin degradation through the treatment of pancreatic cancer cells SW1990 with different concentrations of lithium chloride indicated that accumulation of β-catenin was sufficient to induce TBX2 expression. Conclusion: TBX2 gene plays an important role in the occurrence and development of pancreatic cancer and the accumulation of β-catenin contributes to the expression of TBX2. The Wnt/β-catenin signaling pathway participates the regulation of TBX2 in pancreatic cancer cells.展开更多
文摘目的建立斑马鱼 Tbx2基因阻抑先天性心脏病动物模型,并研究 Tbx2基因对心脏发育的影响。方法通过吗啉环寡聚核苷酸显微注射介导的翻译抑制,观察 Tbx2基因阻抑胚胎的心脏发育,并通过心脏特异性分子标记整胚原位杂交技术进一步阐明 Tbx2在心脏发育中的作用。结果600枚 Tbx2基因阻抑的斑马鱼胚胎受精后8 h 27.2%(163/600)胚胎死亡,24～96 h 出现轻、中、重度不同程度的心脏发育异常,比例分别为21.3%(128/600)、32.8%(197/600)、18.7%(112/600),心脏缺陷包括心室发育不良、心房扩张、房室区异常、心率缓慢、心律不齐、血液反流等,整胚原位杂交结果显示了房率区特异性分子标记多能聚糖(versican)基冈表达的异常。结论斑马鱼是研究心脏发育的理想模式生物,吗啉环寡聚核苷酸基因阻抑足研究基因功能的良好方法。Tbx2基因在房窜特异性分化和房室管形成方面起了重要的作用。
文摘Objective: To investigate the expression of Tbx2 protein in pancreatic cancer tissues and its molecular regulation mechanism by Wnt/β-catenin signaling. Methods: 49 pancreatic cancer and 13 non-cancer tissue specimens were obtained and examined the expression of Tbx2, and the correlation between the expression of Tbx2 and clinicopathological parameters was analyzed. The immunohistochemistry, immunocytochemistry, RT-PCR and Western blot assay methods were used to detect the changes of expression levels of β-catenin and Tbx2. Results: Tbx2 was amplified in 34 of 49 pancreatic cancers, and in 13 non-cancer tissues, only one sample amplified. The further study demonstrated that Tbx2 had a significant positive correlation with tumor differentiation degree and clinical stage, but it did not relate to the sex, age and the disease region. Inhibi-tion of β-catenin degradation through the treatment of pancreatic cancer cells SW1990 with different concentrations of lithium chloride indicated that accumulation of β-catenin was sufficient to induce TBX2 expression. Conclusion: TBX2 gene plays an important role in the occurrence and development of pancreatic cancer and the accumulation of β-catenin contributes to the expression of TBX2. The Wnt/β-catenin signaling pathway participates the regulation of TBX2 in pancreatic cancer cells.
