Abstract
Ice-binding proteins (IBPs) are capable of binding ice crystals and inhibiting their growth. IBPs have also been reported to stabilize cell membranes under non-freezing conditions. The effects of IBPs help to reduce cold- and freezing-induced damage to cells and tissues in cryopreservation. Here, we examined whether certain IBPs, namely, fish NfeIBP6 and NfeIBP8 and fungal AnpIBP1a N55D (AnpIBP), improve the recovery rate of the nematode Caenorhabditis elegans after a deep cryopreservation at -80°C. The expression of fungus-derived AnpIBP in C. elegans significantly improved its recovery rate. This result provides useful information to establish a cryopreservation technique for long-term storage using IBP molecules.
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