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Synergistic and tunable human gene activation by combinations of synthetic transcription factors

Abstract

Mammalian genes are regulated by the cooperative and synergistic actions of many transcription factors. In this study we recapitulate this complex regulation in human cells by targeting endogenous gene promoters, including regions of closed chromatin upstream of silenced genes, with combinations of engineered transcription activator–like effectors (TALEs). These combinations of TALE transcription factors induced substantial gene activation and allowed tuning of gene expression levels that will broadly enable synthetic biology, gene therapy and biotechnology.

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Figure 1: Synergistic activation of gene expression by combinations of TALE-TFs.
Figure 2: Combinatorial regulation of gene expression by TALE-TFs.

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Acknowledgements

This work was supported by a US National Institutes of Health (NIH) Director's New Innovator Award (DP2-OD008586), a National Science Foundation (NSF) Faculty Early Career Development (CAREER) Award (CBET-1151035), NIH R03-AR061042, The Hartwell Foundation Individual Biomedical Research Award and a March of Dimes Basil O'Connor Starter Scholar Award to C.A.G.; grants from the NIH (P50-GM081883) and the Defense Advance Research Projects Agency (HR0011-09-1-0040) to A.J.H.; and grants from the NIH to G.E.C. (U54-HG004563) and F.G. (R01-AR048852). D.G.O. was supported by a predoctoral fellowship from the American Heart Association. K.A.G. was supported by an NSF Graduate Research Fellowship.

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P.P.-P., A.M.F., G.E.C., A.J.H. and C.A.G. designed experiments. P.P.-P., D.G.O., J.M.B., A.M.F. and K.A.G. performed the experiments. P.P.-P., F.G., G.E.C., A.J.H. and C.A.G. analyzed the data. P.P.-P. and C.A.G. wrote the manuscript.

Corresponding author

Correspondence to Charles A Gersbach.

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The authors declare no competing financial interests.

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Perez-Pinera, P., Ousterout, D., Brunger, J. et al. Synergistic and tunable human gene activation by combinations of synthetic transcription factors. Nat Methods 10, 239–242 (2013). https://doi.org/10.1038/nmeth.2361

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