The Human Cytomegalovirus Immediate‐Early Promoter is Transcriptionally Active in Undifferentiated Mouse Embryonic Stem Cells
- 1 September 2002
- journal article
- Published by Oxford University Press (OUP) in The International Journal of Cell Cloning
- Vol. 20 (5) , 472-475
- https://doi.org/10.1634/stemcells.20-5-472
Abstract
It has been reported recently that the cytomegalovirus (CMV) immediate-early promoter is transcriptionally inactive in undifferentiated mouse embryonic stem (ES) cells. This result is surprising, since the CMV promoter is used to express transgenes in a variety of cell lines. We studied the expression of a human CMV-driven enhanced green fluorescent protein (EGFP) reporter gene (pEGFP-N1) in five undifferentiated mouse ES cell lines (BL/6III, D3, E14TG2a, MESC20, and 129) and found EGFP expression in all of these cell lines. Under optimal conditions, between 50%-80% transfection efficiencies could be achieved, and EGFP expression levels were maintained for at least 72 hours. Therefore, the human CMV promoter remains a useful system for transgene expression in undifferentiated ES cells.Keywords
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