Though human cells spontaneously group into rudimentary organs, some scientists say work is very preliminary
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A tiny cluster of lab-grown human cells that sprouts into liver tissue could one day nix the need for organ donors. But the promise has drawn both praise and criticism, with some scientists arguing that the results are unconvincing.
Using a new technique to craft mini organs, stem cell biologist Takanori Takebe of Yokohama City University in Japan, and his colleagues report that they created human livers in a dish. After transplantation into mice, the liver cells hooked up to blood vessels and behaved like human livers, Takebe’s team says July 3 in Nature.