Sea Cucumber Tissue Survives Years After Being Cut from the Body, Study Finds
Canadian scientists discovered that tissue fragments removed from scarlet sea cucumbers can continue to live, heal, and function independently for at least three years. The study, published in the peer-reviewed journal Science Advances, found that detached tissue absorbed nutrients, maintained immune and metabolic activity, and even responded to touch. Researchers say the findings challenge conventional understanding of tissue mortality and could have significant implications for regenerative medicine and tissue engineering.
A study published in Science Advances reveals that fragments of tissue cut from scarlet sea cucumbers — including tube feet and tentacles — do not die after separation from the animal's body. In experiments conducted by Canadian scientists, these tissue pieces survived for over three years in natural running seawater, continuing to heal, absorb nutrients, and maintain cellular and immune activity. Some isolated tentacles retained sensitivity to touch, indicating that a functional neural network was preserved. Notably, the tissue endured not in a sterile laboratory environment but in natural seawater, which is highly microbially diverse; researchers suggest this rich environment may have actually supported the tissue's survival. Marine biogeochemist Rachel Sipler compared the phenomenon to asking whether a lizard's detached tail could grow an entirely new lizard. The research team argues the findings represent 'a redefinition of what it means for tissue to be alive' and propose the sea cucumber tissue as a new class of experimental model with ethical advantages over traditional animal models. The authors believe the discovery has broad implications for regenerative biology and biomedical research.
Limitations & open questions
The study does not clarify what the upper limit of the tissue's survival duration might be, as the fragments had still not broken down after three years with no endpoint established. It is also unclear how broadly these findings apply to other sea cucumber species beyond the scarlet sea cucumber.
What different sources said
- Yahoo FinanceCenter
'A redefinition of what it means ... to be alive': Sea cucumber tissue cut from the body still refuses to die
- YahooCenter
'A redefinition of what it means ... to be alive': Sea cucumber tissue cut from the body still refuses to die
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