Based on our previous study, galectin-3 expression was significantly reduced in SHR prefrontal cortex area, and differential between PC12H and PC12L cells. Novelly, we have inspiration that whether it existence a regulatory mechanism between galectin 3 and tyrosine hydroxylase gene: Firstly, observe the expression of galectin-3 and TH after promote the differentiation of PC12L by nerve growth factor; following overexpressing galectin-3 in PC12H and interference it in PC12L cells through transgene to detect their effects on expression of TH; on the basis of overexpression, interference and mutant of galectin-3, analysis the impact on ß-catenin, GSK-3B, TCF4 protein levels and interactions and the activity of transcription factor binding to TH gene promoter; then get the mutation of cis-acting elements region of the TH promoter one by one, dectect the variation of those impaction. We expect to build specific mechanism system about galectin 3 regulates TH. Galectin-3 is also expected to become new regulatory molecules of ADHD.
在前研究发现ADHD动物模型前额区半乳糖凝集素3(galectin-3)基因表达明显降低,以及PC12H、L细胞中具有差异表达的基础上,研究半乳糖凝集素3对酪氨酸羟化酶基因的调控机制。通过神经生长因子促进PC12L细胞向神经元分化,观察半乳糖凝集素3和酪氨酸羟化酶的表达;采用转基因手段,在PC12H细胞中过表达半乳糖凝集素3和在PC12L细胞中干扰半乳糖凝集素3,观察其对酪氨酸羟化酶基因表达的影响;分析半乳糖凝集素3过表达、干扰及其突变体对ß-catenin、GSK-3B、TCF4相互作用以及对转录因子结合到酪氨酸羟化酶基因启动子的影响;将酪氨酸羟化酶启动子区域的顺势作用元件逐个突变观察半乳糖凝集素3对其影响的变化。构建半乳糖凝集素3调控酪氨酸羟化酶的具体机制系统,半乳糖凝集素3也有望成为ADHD的调控分子。
背景. 注意缺陷多动障碍(ADHD)是全球最常见的儿童行为障碍,其病因和发病机制仍不清楚。在前研究发现ADHD动物模型前额区半乳糖凝集素3(galectin-3)基因表达明显降低,以及PC12H、L细胞中具有差异表达的基础上,研究半乳糖凝集素3对酪氨酸羟化酶基因的调控机制。.研究内容、结果. 通过神经生长因子促进PC12L细胞向神经元分化,观察半乳糖凝集素3和酪氨酸羟化酶的表达;采用转基因手段,在PC12H细胞中过表达半乳糖凝集素3和在PC12L细胞中干扰半乳糖凝集素3,观察其对酪氨酸羟化酶基因表达的影响;分析半乳糖凝集素3过表达、干扰及其突变体对ß-catenin、GSK-3B、TCF4相互作用以及对转录因子结合到酪氨酸羟化酶基因启动子的影响;将酪氨酸羟化酶启动子区域的顺势作用元件突变观察半乳糖凝集素3对其影响的变化。构建半乳糖凝集素3调控酪氨酸羟化酶的具体机制系统,半乳糖凝集素3也有望成为ADHD的调控分子。.科学意义. 研究发现Gal-3可能通过调节某些信号通路,影响酪氨酸羟化酶启动子的活性,进而调控酪氨酸羟化酶的表达水平。
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数据更新时间:2023-05-31
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