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Mouse cells grown in rats cure diabetes in mice

Human-animal hybrid embryos may one day provide transplant organs

chimeric mouse embryo

SPOT ON  Researchers created a mouse embryo that contains rat cells (red). Hybrid, or chimeric, animals may eventually grow human organs to be used in transplants.

Salk Institute

By Tina Hesman Saey

- More than 2 years ago

Growing human organs in other animals is a small step closer to reality.

Injecting human stem cells into pig and cattle embryos created embryos that incorporate a small number of human cells, scientists report January 26 in Cell.