Abstract
Low yield from transient gene expression in mammalian cells limits its application to areas where large amount of proteins are needed. One effective approach to enhance transient gene expression levels is to use post-transcriptional regulatory elements (PTREs). We have evaluated the effect of five PTREs on the transient gene expression of three proteins in two cell lines. Most of the elements increased expression but exhibited cell-specific and gene-specific effects. The tripartite leader sequence of human adenovirus mRNA linked with a major late promoter enhancer gave the most universal and highest enhancement of gene expression levels. It increased the expression of all three proteins in HEK293 cells and two proteins in CHO K1 cells by 3.6- to 7.6-fold. Combinations of multiple PTREs increased protein expression as much as 10.5-fold.
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This work was supported by the Biomedical Research Council/Science and Engineering Research Council of A*STAR (Agency for Science, Technology and Research), Singapore.
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Mariati, Ho, S.C.L., Yap, M.G.S., Yang, Y. (2012). Post-transcriptional Regulatory Elements for Enhancing Transient Gene Expression Levels in Mammalian Cells. In: Hartley, J. (eds) Protein Expression in Mammalian Cells. Methods in Molecular Biology, vol 801. Humana Press. https://doi.org/10.1007/978-1-61779-352-3_9
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DOI: https://doi.org/10.1007/978-1-61779-352-3_9
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