Genotoxicity profiling reveals distinct platform-and cell type-specific effects in therapeutic gene editing for genetic hyperinflammation.
Lei L, Kaufmann MM, Lao J, Thoulass G, Ammann S
Crispr
Gene editing tools developed in medical research — like the base editors here — are the same foundational technology being adapted to improve disease resistance in food crops and ornamental plants, so advances in their safety profiling directly shape how confidently breeders can deploy them in your garden's future tomatoes or disease-resistant elms.
Researchers fixed a broken gene in mice that caused their immune systems to dangerously overreact, using a tool that makes tiny, precise changes to DNA letters without snipping the DNA strand. The fix worked well enough that transplanting corrected cells protected the mice from getting sick. However, the study also showed that different editing tools and different types of cells can create unintended side effects in different ways, which is important to understand before using these tools in people — or plants.
Key Findings
Cytosine base editing achieved 62–89% efficiency in correcting the target mutation across fibroblasts, T cells, and blood stem cells.
Transplantation of edited blood stem cells protected mice from virus-triggered hyperinflammation, validating the therapeutic approach.
Hyperactive base editors caused broader off-target DNA changes and more structural variants than standard CRISPR-Cas9, with stability of chromosomal rearrangements varying by cell type.
chevron_right Technical Summary
Scientists used a precise gene-editing tool called a base editor to correct a genetic mutation in immune cells, successfully treating a rare and dangerous inflammatory disease in mice without needing to cut both strands of DNA. The study also found that different editing platforms and cell types carry distinct safety risk profiles.
Abstract Preview
Base editors enable precise correction of point mutations without requiring DNA double-strand breaks, yet platform- and cell type-specific genotoxicities remain incompletely characterized. Here, we...
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