Establishment of double reporter transgenic mice for monitoring Cre recombinase activity
- VernacularTitle:检测Cre位点特异重组酶活性的双报告转基因小鼠建立
- Author:
Huanzhang ZHU
;
Jianquan CHEN
;
Guoxiang CHENG
;
Jinglun XUE
;
- Publication Type:Journal Article
- Keywords:
transgenic mice;
lacZ;
alkaline phosphatase gene;
Cre recombinase
- From:Journal of Third Military Medical University
1984;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish a double reporter transgenic mice for monitoring Cre recombinase activity. Methods ZAP DNA fragment with lacZ and human alkaline phosphatase (hAP) gene was microinjected into the male pronucleus of 554 fertilized eggs from C57BL/6 mice. The founder mice and their progeny were screened for integration of transgene into the mouse genome by PCR and Southern blotting. The expression of lacZ transgene at early embryos from F1 generation mice was analyzed by X gal staining. Results A total of 398 survival ZAP DNA injected fertilized eggs were transfered to the oviducts of 21 pseudopregnant recipient mice. Of the 21 recipient mice, 13 became pregnancy and gave birth to 68 offspring mice. The zygote survival rate and birth rate were 71% (398/554) and 17% (68/398), respectively. Of the 68 offspring mice, 9 mice (5 males and 4 females) were identified by PCR and Southern blot analysis. Total integration rate and efficiency of transgene was 13% (9/68) and 1.6% (9/554), respectively. Nine mice as the founders were back crossed to set up F1 generation with other inbred C57BL/6 mice. Out of 9 transgenic mice, transmission of reporter gene in F1 offspring mice followed Mendelian rules, but the expression of lacZ protein was detected at the early embryonic stage (13.5 days postcoitum) in only 3 mice. Conclusion A double reporter transgenic mice for monitoring Cre recombinase activity is established.
