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Kctd10与TBX蛋白相互作用调控房室间隔形成的研究
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摘要
心脏是脊椎动物中最早形成并行使功能的器官之一。心脏发育过程中,心管经过复杂的环化过程,形成心房和心室间隔即AVC(atrioventricular canal),进而形成心脏的腔室结构,发育成有功能的心脏。已有的研究表明,斑马鱼中kctd10通过抑制tbx5a影响AVC的形成,小鼠中Tbx20和Tbx2b对AVC的形成也存在作用。为了探究斑马鱼AVC形成过程中kctd10与tbx5a、tbx20和tbx2b相关作用的关系,我们利用原位杂交技术检测了突变体kctd10中tbx2b在心脏的表达谱,通过免疫共沉淀技术检测了kctd10与tbx20蛋白的相互作用。结果显示,突变体kctd10中tbx2b基因在心脏的表达谱发生变化,kctd10与tbx20蛋白存在相互作用关系。利用CRISPR/Cas9基因编辑技术分别构建了tbx5a、tbx20和tbx2b的斑马鱼突变体,进一步研究AVC形成过程中,kctd10与TBX家族3个蛋白的相互作用关系。
Heart is one of the first formedfunctional organsinvertebrate. During its development,the heart tube undergoes looping to form atrioventricular canal(AVC) and finally develops into multi-chambered functional organ. Previous studies showed that kctd10 suppresses tbx5a to control AVC in zebrafish and both Tbx2 b and Tbx20 havesignificant effects on formation of AVC in mouse. The results of the in situ hybridization of tbx2 b showed that tbx2 b expression pattern had changed in the kctd10 mutant compared with the wild type zebrafish.The co-immunoprecipitation results indicated that the tbx20 has a interaction relationship with kctd10.Therefore,we constructed the mutants of the three TBX genes of tbx5 a, tbx20 and tbx2 brespectively using CRISPR/Cas9 gene editing technology to further study the relationship between kctd10 and the tree TBX genes during the process of AVC formation.
引文

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