Engineering and characterisation of AAVS1 FRT cell lines for inducible and dose-dependent gene expression

An RPE1 AAVS1 FRT8 line with a TetOn3G-FRT cassette enables highly consistent, dose-dependent inducible transgene expression across independent clones as a monoclonal population.

• Why it matters: Stable, reproducible gene-function studies are limited by random integration, which can yield variable expression, leaky basal activity, and disruption of endogenous loci.
• What they did: Using CRISPR/Cas9(D10A) nickase, the team integrated a TetOn3G-FRT cassette into the AAVS1 safe-harbour locus, then used Flp-FRT “plug-and-play” insertion plus Tet-On 3G control.
• The result: Whole genome sequencing showed precise heterozygous integration at AAVS1 and de novo duplications elsewhere, and multi-omics (high-resolution proteomics and cell-cycle analysis) indicated no significant perturbation of homeostasis or phenotypic fitness.

AI summary of the abstract · may contain errors · not medical advice · read the paper.