摘要
目的:构建四环素调控性牙本质涎磷蛋白(DSPP)转基因体系中的受控小鼠系.方法:从质粒pBluescript-DSPP中,将小鼠DSPP编码序列亚克隆到pTRE2的NotI/SalI位点间,构建转基因载体,经酶切鉴定和测序确认后,命名为pTRE2-DSPP;将XhoI酶切线性化的载体DNA纯化后,显微注射到小鼠受精卵的雄原核中,挑选生长状态好的受精卵,移植到假孕母鼠的输卵管.仔鼠出生3wk后,用PCR及SouthernBlot检测阳性小鼠.结果:注射的受精卵共存活657枚,移卵至28只假孕母鼠后,产仔85只,PCR检测10只为阳性,SouthernBlot检测6只为阳性.SouthernBlot检测阳性小鼠分别传代,开始建系.结论:显微注射方法获得了DSPP转基因受控小鼠的G0代.
AIM: To establish tetracycline-responsive regulated transgenic mice of dentin sialophosphoprotein (DSPP). METHODS: DSPP coding sequence was contained in plasmid pBluescdpt-DSPP and the transgenic vector was constructed by subcloning it into pTRE2 by Notl/Sail digestion. Following identification by enzyme digestion and sequencing, the final plasmid was named pTRE2DSPP, After linearized by Xhol and recovery, the plasmid was microinjected into the male pronucleus of the zygotes and the zygotes in good condition were implanted into pseudopregnant mice. The tail DNA of 3 week-pups was tested by PCR and Southern blot. RESULTS: Six hundred and fifty-seven embryos were implanted to 28 recipient pseudo- pregnant mice, with 6 of the 85 pups carrying the transgene. The establishment of the transgenic line progressed from the 6 positive ones. CONCLUSION: The founders of the tetracycline-responsive regulated transgenic mice of DSPP are established successfully.
出处
《第四军医大学学报》
北大核心
2005年第16期1454-1456,共3页
Journal of the Fourth Military Medical University
关键词
牙
牙本质涎磷蛋白
小鼠转基因
微量注射
tooth
dentin sialophosphoprotein
mice,transgenic
microinjections