alexa The human cytomegalovirus immediate-early promoter is transcriptionally active in undifferentiated mouse embryonic stem cells.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Ward CM, Stern PL

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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. This article was published in Stem Cells and referenced in Journal of Stem Cell Research & Therapy

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