时空表达可控的转基因动物模型调控体系的研究
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Q789

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国家自然科学基金资助课题(批准号:30470265)。


Monitoring System in Transgenic Animal Models of Controllable Temporal and Spatial Expression
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    摘要:

    目的在血管内皮细胞建立时空表达可控的转基因动物模型调控体系。方法培育两个配套的转基因动物品系,利用组织专一性启动子确保转基因表达的空间专一性,利用四环素诱导系统对转基因表达在时间上实施调控。结果将血管内皮细胞特异性表达的VE cadherin基因启动子与人工融合的转录因子tTA基因连接,建立转基因小鼠品系VE cadherin:tTA;将tetoperon的启动子与myrAkt1连接,建立转基因小鼠品系TET:myrAkt1。两系鼠杂交的子代,筛选的阳性纯合子,能可控性地在血管内皮细胞特异性表达目的基因Akt1PKB。结论利用VE cadherin基因启动子和tet off诱导表达系统,可以达到在时间上和空间上都能人为控制目的基因在血管内皮细胞上特异性表达的目的。

    Abstract:

    Objective In order to establish a monitoring system in transgenic models of controllable temporal and spatial expression in endothelial cells. Methods\ Two binary transgenic mouse models were constructed. One was a spatial specificity expressing model by using tissue specific promoter, and the other was an artificially controlled temporal expressing model using tet off system. Results\ Endothelial cell specific driver mice VE cadherin:tTA was created by cloning the tetracycline regulated transcriptional activator (tTA) under the control of the endothelial cell specific VE cadherin promoter. TET:myrAkt1 transgenic mice were constructed using full length Akt1 with a c Src myristoylation sequence under the control of the tet operon promoter. The binary transgenic mouse was produced by crossing with transgenic mice, and an inducible expression of endothelial cell Akt1/PKB can be controlled by administration with tetracycline. Conclusions\ Temporal and spatial expression of target gene in endothelial cells can be controlled artificially by using VE cadherin promoter and tet off system.

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孙敬方.时空表达可控的转基因动物模型调控体系的研究[J].中国实验动物学报,2005,(2):72~75.

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