ArticleStem cells (Dayton, Ohio)2025
Optimizing approaches for targeted integration of transgenic cassettes by integrase-mediated cassette exchange in mouse and human stem cells.
Article in Stem cells (Dayton, Ohio), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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Who cites it
4 citing papers in PubMed.
- Large serine recombinase-mediated gene insertion for high-throughput screens: advantages, design principles, and applications.Nucleic acids research · 2026Review
- In vitro properties of large serine integrase hybrids derived from ϕC31 and TG1 integrases.Nucleic acids research · 2026Article
- Light- and chemical-induced ciliary signaling governs dorsal/ventral regionalization of human telencephalic organoids.Nature communications · 2026Article
- Application of nanobody‑based CAR‑T in tumor immunotherapy (Review).International journal of molecular medicine · 2025Review
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Authors and funding
12 authors.
Funding
Abstract
To enable robust expression of transgenes in stem cells, recombinase-mediated cassette exchange at safe harbor loci is frequently adopted. The choice of recombinase enzyme is a critical parameter to ensure maximum efficiency and accuracy of the integration event. We have explored the serine recombinase family of site-specific integrases and have directly compared the efficiency of PhiC31, W-beta, and Bxb1 integrase for targeted transgene integration at the Gt(ROSA)26Sor locus in mouse embryonic stem cells. All 3 integrases were found to be suitable for efficient engineering and long-term expression of each integrase was compatible with pluripotency, as evidenced by germline transmission. Bxb1 integrase was found to be 2-3 times more efficient than PhiC31 and W-beta. The Bxb1 system was adapted for cassette exchange at the AAVS1 locus in human induced pluripotent stem (iPS) cells, and the 2 commonly used ubiquitous promoters, CAG and Ef1α (EIF1A), were tested for their suitability in driving expression of the integrated transgenic cargo. AAVS1-integrated Ef1α promoter led to a very mosaic pattern of expression in targeted hiPS cells, whereas the AAVS1-integrated CAG promoter drove consistent and stable expression. To validate the system for the integration of functional machinery, the Bxb1 integrase system was used to integrate CAG-driven CRISPR-activation and CRISPR-inhibition machinery in human iPS cells and robust sgRNA-induced up- and downregulation of target genes was demonstrated.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.