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Salamanders and zebrafish reveal how limbs regrow

Original: 🦎 NEW: # Salamanders and # zebrafish regrow lost limbs and fins by reactivating a cellular program after injury, forming

Salamanders and zebrafish can regrow lost limbs and fins by reactivating a cellular repair program after injury. The wound forms a blastema, a cluster of cells that multiply and rebuild bone, nerve, muscle and blood vessels in the correct shape and size, with nerves playing a key driving role in the process. The finding is drawing attention for what it suggests about regeneration and evolution.

Why now: New scientific discussion of how these animals regenerate tissue is circulating among science readers.

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Evidence

• 🦎 NEW: # Salamanders and # zebrafish regrow lost limbs and fins by reactivating a cellular program after injury, forming a blastema of cells that multiply and rebuild bone, nerve, muscle and blood vessels in the right shape and size. # Nerves drive the process, and # evolution… · tksst@fediscience.org · 9

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