{
  "id": 17832931,
  "title": "Engineering and characterisation of AAVS1 FRT cell lines for inducible and dose-dependent gene expression",
  "url": "https://urgent.news/2026/11/02/engineering-and-characterisation-of-aavs1-frt-cell-lines-for",
  "topic": "science",
  "section": "Science",
  "published": "2026-11-02T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.10.29.762215v1?rss=1"
  },
  "original_language": "en",
  "account": "Engineering and characterisation of AAVS1 FRT cell lines for inducible and dose-dependent gene expression presents a critical advancement in high reproducibility biological research. Traditional techniques often face issues like unpredictable expression levels, unintended basal activity, and disruption of key genomic regions. To overcome these hurdles, we developed a novel RPE1 cell line through CRISPR/Cas9(D10A) nickase-mediated integration of a TetOn3G-FRT cassette into the AAVS1 safe-harbour locus. This innovative platform leverages the Flp-FRT recombination system for swift, precise, and plug-and-play transgene insertion alongside the Tet-On 3G system for tight, dose-dependent expression control.\n\nThe engineered RPE1 AAVS1 FRT8 line demonstrates exceptional consistency in transgene induction across multiple independent clones, behaving as a monoclonal population. To ensure the reliability of this platform, we conducted rigorous cell line characterisation using a multi-omics approach. Whole genome sequencing confirmed precise heterozygous integration at the target locus, along with de novo genomic duplications on other chromosomes. High-resolution proteomics and cell cycle analysis revealed that these genetic alterations did not significantly impact cellular homeostasis or phenotypic fitness.\n\nThis breakthrough establishes a robust and dependable platform for the efficient generation of inducible AAVS1 FRT stable cell lines. By facilitating reproducible research in modern molecular biology, this technique promises to significantly streamline investigations into biological function with unparalleled precision and control.",
  "summary": "Investigating biological function with high reproducibility requires the generation of stable cell lines that offer precise and inducible transgene expression. However, traditional methods often suffer from the limitations of random genomic integration, including unpredictable expression levels, leaky basal activity, and disruption of endogenous loci. To address these challenges, we engineered a…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}