Sea Cucumber 'Zombies' Defy Death in Lab

Researchers have discovered that severed body parts from a specific sea cucumber, Psolus fabricii, can survive and heal themselves for over three years in laboratory conditions. These tissue fragments, which lack a mouth, continue to absorb nutrients and maintain cellular function indefinitely. Scientists have affectionately termed these resilient parts 'zombies' because they appear to exist on the threshold between life and death, retaining vitality without developing into whole new organisms.

The initial discovery was accidental when detached tube feet remained adhered to lab equipment for an extended period, showing signs of healing and survival. Unlike typical tissue deterioration, these sea cucumber fragments thrive in untreated seawater, teeming with microorganisms, and exhibit active immune responses. This unprecedented 'tissue immortality' in natural settings could revolutionize medical research by offering a sustainable source of immortal cells.

These 'zombie' tissues may provide a valuable alternative to human immortal cell lines like HeLa, which carry ethical considerations and require sterile environments. The sea cucumber cells, conversely, could be utilized without the same ethical constraints. Furthermore, their resilience may prove useful for ocean health studies, testing environmental stressors like rising temperatures or pathogens.