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Published in Neuron - 17 Jun 2020

Kumamoto T, Maurinot F, Barry-Martinet R, Vaslin C, Vandormael-Pournin S, Le M, Lerat M, Niculescu D, Cohen-Tannoudji M, Rebsam A, Loulier K, Nedelec S, Tozer S, Livet J,

Link to Pubmed [PMID] – 32559415

Link to DOI [DOI] – 10.1016/j.neuron.2020.05.038

Neuron 2020 Jun; ():

Stable genomic integration of exogenous transgenes is essential in neurodevelopmental and stem cell studies. Despite tools driving increasingly efficient genomic insertion with DNA vectors, transgenesis remains fundamentally hindered by the impossibility of distinguishing integrated from episomal transgenes. Here, we introduce an integration-coupled On genetic switch, iOn, which triggers gene expression upon incorporation into the host genome through transposition, thus enabling rapid and accurate identification of integration events following transfection with naked plasmids. In vitro, iOn permits rapid drug-free stable transgenesis of mouse and human pluripotent stem cells with multiple vectors. In vivo, we demonstrate faithful cell lineage tracing, assessment of regulatory elements, and mosaic analysis of gene function in somatic transgenesis experiments that reveal neural progenitor potentialities and interaction. These results establish iOn as a universally applicable strategy to accelerate and simplify genetic engineering in cultured systems and model organisms by conditioning transgene activation to genomic integration.

https://pubmed.ncbi.nlm.nih.gov/32559415