Jellyfish Scar-Free Wound Healing Mechanism

Researchers, led by Jocelyn Malamy at the University of Chicago, have uncovered the mechanisms behind the rapid, scar-free wound healing observed in the jellyfish species Clytia hemisphaerica. The study, published in Molecular Biology of the Cell, reveals that healing is driven by two sequential cellular structures: lamellipodia, which act as 'foot-like feelers' to crawl across the basement membrane, and an actomyosin cable that contracts to close the wound. The basement membrane itself acts as a signal, guiding the choice of repair strategy. This research offers a simplified model for understanding wound repair, as Clytia hemisphaerica lacks the complex immune responses and blood vessel networks that complicate studies in mammals. The findings suggest that these fundamental healing processes may be evolutionarily conserved and could provide insights for developing new regenerative medicine therapies for humans, particularly for chronic wounds and surgical incisions. Future research by Jocelyn Malamy will focus on how the basement membrane itself is repaired.