摘要
本研究以pESnx穿梭质粒为载体,选用恶臭假单孢杆菌TOL质粒上的xylE基因作为突变靶基因组构建的重组构件,经微注射导入ICR小鼠549枚受精卵雄原核,将存活的352枚卵移入24只假孕鼠输卵管内,7只妊娠,共产仔41只,其中7只死胎,出生后死亡4只,30只存活。注射卵存活率为64%(352/549),出生率为11.6%(41/352)。存活鼠经PCR-Southern检测,整合率为57%(17/30)。在整合阳性鼠中选择了杂交信号较强的2只当代公鼠,通过回收载体和转化试验,结果表明整合基因完整,具有转化的功能,由此,建立了突变靶基因xylE转基因小鼠模型。
In this study,transgenic mice were generated by microinjecting pESnx shuttle vector (12.7Kb) into the male pronucleus of 549 fertilized eggs of ICR mice.The pESnx contains a xylE mutational target gene from TOL plasmid of pseudomona putida.352 eggs survived were transplanted into the oviduct of 24 psuedopregnant ICR mice respectively. 7 got pregnant and 41 offsprings were delivered,7 of them were stillbirths,4 of them died in few days after birth.The ratio of survival eggs is 64%(352/549) and the ratio of birth is 11.7 offsprings per 100 transfered eggs.17 positive of the 30 survival offsprings were identified by PCR and Southern blotting analysis,the ratio of integration is 57%(17/30).By recovery of the vector and transformation,it indicated the integrated vector contained intact target gene,so transgenic mouse model carrying xylE mutational target gene was established.
出处
《中国实验动物学报》
CAS
CSCD
1997年第2期93-97,共5页
Acta Laboratorium Animalis Scientia Sinica