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An efficient transfection method for mouse embryonic stem cells

Abstract

Embryonic stem (ES) cells are considered to have potentials for tissue regeneration and treatment of diverse human diseases. ES cells are capable of indefinite renewal and proliferation, which can be induced to differentiate into tissues of all three germ lines. Despite these exciting potential, it remains unclear as to how the renewal and differentiation programs are operated and regulated at the genetic level. Genetic manipulation such as delivery of exogenous gene expression or knockdown with small interfering RNA (siRNA) is commonly used in most of cancer or transformed cells but relatively rare in ES cells. In this study, we compare the transfection efficacies of several liposome-based transfection methods by introduction of a plasmid encoding enhanced green fluorescent protein (EGFP) into mouse ES (mES) cells. Our results show that transfection by Effectene achieves the efficiency of >98% in CCE and >80% in D3 cells. The optimal ratio of DNA:Effectene for EGFP transfection is between 1:4 and 1:8. Transient-expressed EGFP or endogenous protein kinase A (PKA) were significantly knocked down by Effectene transfection of specific siRNA. High EGFP level expression and accumulation in mES cells induces minor cytotoxicity but can be reduced by introducing siRNA of EGFP. Further, this transfection method did not significantly affect mES properties of proliferation or differentiation. Our results provide an optimal protocol to achieve an efficient transfection for mES cells.

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Acknowledgements

We thank Dr KK Wu, Dr BL Yen and Mr CH Chen for their helpful assistance. This work was supported by National Health Research Institutes (96A1-CVPP-03–017) and National Science Council (NSC96-3111-B-400–004) to JYL.

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Correspondence to J Y Liou.

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Ko, B., Chang, T., Shyue, S. et al. An efficient transfection method for mouse embryonic stem cells. Gene Ther 16, 154–158 (2009). https://doi.org/10.1038/gt.2008.125

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