Life Sciences & Medicine Active Updated Oct 7, 2026
Growing human brain tissue inside mouse brains
Where it stands as of Sep 26, 2026
Scientists have begun replacing sections of the mouse cortex with human brain tissue, an early step toward chimeric brains meant to model neurological disorders directly. PsyPost reported the swap on 2026-09-26, without yet detailing how much of the circuit was human or how it functioned inside a living mouse. It remains unknown how closely these chimeric circuits reproduce a human brain's actual disease processes.
The story so far
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Oct 7, 2026 Latest
Nature published a piece arguing that brain organoids grafted into mice that lack a cortex will advance human brain research.
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Oct 1, 2026
ScienceAlert reported that scientists connected three human mini-brains in a dish and learned something that single organoids could not show.
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Sep 30, 2026
Nature published an editorial calling for international oversight of lab-grown brain organoids, and STAT ran an opinion piece on what to think about mice with half-human brains.
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Sep 26, 2026
PsyPost reported that scientists replaced mouse cortex tissue with human brain tissue to create a model system for studying neurological disorders.
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