GoKawiilTwo studies use CRISPR 'cell recorders' to map mouse embryo development
Researchers from two independent teams, publishing in Science and Cell, used CRISPR-based gene editing to introduce and track mutations in dividing mouse embryo cells, reconstructing cell lineage maps. One team traced a two-week-old embryo back to a single fertilized egg, while the other recorded most cell divisions during organ formation. The work echoes John Sulston's 1980s cell-by-cell mapping of the roundworm C. elegans, but extends the approach to mammals, whose development involves billions of cells and external influences rather than a fixed pattern.
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The techniques could give biologists a way to study how mammalian cells diversify into different organs despite random patterns of division, according to geneticist Jay Shendure, who led one study. Such lineage-tracking tools might eventually help researchers understand developmental disorders or cancer, where cell fate goes awry, though the current work focuses on basic science rather than direct medical application. The approach could also open the door to similarly detailed maps in other mammals, including potentially humans.
- Two independent teams published mouse embryo lineage studies in Science and Cell using CRISPR-based 'cell recorders.'
- The work builds on John Sulston's 1980s complete cell map of the worm C. elegans.
- Unlike worms, mammalian development involves billions of cells and external cues, making lineage tracing far more complex.
Source: nature.com — Ewen Callaway, 2026-10-08
Published there as: “How to build a mouse: Embryo development captured in stunning detail”
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