GoKawiilScientists Grow Human Brain Organoids Inside Mouse Cortex to Study Development
Researchers engineered mice with genetically depleted cortical tissue using Emx1-cre and Esco2 conditional knockout lines, then implanted human-derived brain organoids grown from induced pluripotent stem cells into the resulting cavity. The organoids were produced by aggregating dissociated hiPS cells in microwell plates and guiding them through early neural differentiation with dorsomorphin and SB-431542 before transplantation.
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This chimeric approach lets scientists watch human cortical tissue mature and integrate within a living mammalian brain, offering a more physiologically realistic model than organoids grown in a dish alone. Such xenotransplantation techniques could reshape how researchers study human neurodevelopmental disorders and test therapies, though they also raise fresh ethical questions about human-animal brain chimeras.
- Mice were genetically modified to have depleted cortical tissue, creating space for human organoid grafts.
- Human brain organoids were derived from iPS cells using an established aggregation and differentiation protocol.
- The method enables study of human cortical development within a living rodent brain environment.
Source: nature.com — Kaganovsky, 2026-09-16
Published there as: “Developmental xenocortication using human-derived organoids in mice”
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