What happens when stem cell storage time is up?

Theoretically liquid nitrogen cryopreservation technology can preserve cellular resources indefinitely. Currently, the longest known cell samples stored in the Chinese Academy of Sciences laboratory have been stored for 70 years, which does not mean that freezing can only be done for 70 years, but the development of the entire industry is only 70 years old, with the development of the times, the length of frozen stem cells will continue to be extended.

Of course, the length of the freezing period will ultimately depend on the freezing temperature, knowing that only deep cryogenic freezing state can make the cells in a dormant state. In general, room temperature environment can be saved for 5 hours; low temperature 8 ° can be saved for 48 hours; deep cryogenic refrigerator -80 ° can be saved for a month; liquid nitrogen -196 ° theoretically can be permanently preserved.

The storage time should be renewable.