Tissue composition shapes differential skeletal integration strategies during axolotl limb regeneration.

Skeletal tissue composition at the amputation site influences osteoclast activation and regenerative strategies in axolotl limb regeneration.

• Why it matters: Understanding how tissue composition affects skeletal resorption is crucial for revealing mechanisms of tissue integration during regeneration, which could inform regenerative medicine approaches.
• What they did: The study examined osteoclast activity in amputations damaging different parts of skeletal elements, measuring gene expression of RANKL and Loc483, and analyzing transcriptomic changes in the apical epithelial cap.
• The result: Findings show that diaphyseal amputations activate osteoclast-mediated resorption and sustain RANKL and Loc483 expression, suggesting tissue composition guides regenerative adaptation and tissue integration.