SMRTR Science & EngineeringJun 28, 2025Interesting Engineering

Chinese team makes mice regrow complex tissue using ancient genetic regeneration code

SMRTR summary

Chinese scientists restored damaged ear tissue in mice by reactivating a genetic switch for regeneration. They identified the gene ALDH1A2, which produces retinoic acid, as crucial for tissue regeneration. By injecting retinoic acid or transplanting a rabbit DNA enhancer, mice fully regenerated complex ear tissue. This breakthrough could impact healing of nerves, bones, limbs, lungs, and skin. While challenges persist for other organs, the study marks progress in restoring regenerative abilities in mammals.

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