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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 16, No. 6, 2013
Bioline Code: ej13060
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 16, No. 6, 2013

 en Optimization of transgenesis conditions for the generation of CXCL2-luciferase reporter mice line
Crispo, Martina; Schlapp, Geraldine; Cárdenas-Rodríguez, Magdalena; González-Maciel, Dolores & Rumbo, Martín


Background: Transgenesis by microinjection has been widely used for the generation of different mouse models. Different variables of the procedure may critically affect the efficiency of the process. A DNA construction that carries the CXCL2 promoter gene and firefly luciferase has been used to optimize aspects of the procedure. Three different concentrations (0.5, 1.0 and 4.0 ng/μl) of the DNA construction to microinject a total of 1981 zygotes has been tested. Intact/injected embryos, pregnancy and birth rate, survival of pups 7 days after birth, number of transgenic pups and overall transgenic efficiency was registered and analyzed by Z test of proportions for each group.
Results: A total of seven transgenic founders were detected for the three DNA concentrations used, 1 in 46 alive pups in the 0.5 ng/μl group, 5 in 38 alive pups in the 1 ng/μl group and 1 in 21 alive pups in the 4 ng/μl group ( p < 0.1). The overall transgenic efficiency was higher for the 1 ng/μl concentration, with a transgenic rate of 13.2%.
Conclusions: In conclusion, we have selected the best operative conditions to maximize the transgenesis efficiency. Furthermore, the transgenic lines developed could be used as a reporter model of innate immunity activation with many different applications in the fields of immunology, cancer and neurodegenerative diseases.

DNA concentration; microinjection; reporter systems

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