Abstract
Thermo-reversible gelation polymer (TGP) can be converted into a gel state upon warming and liquid upon cooling. The present study aimed to demonstrate a new method for cryopreservation and encapsulation of rat hepatocytes using a TGP and their successful transplantation. The isolated rat hepatocytes were microencapsulated using TGP, and stored in liquid nitrogen. After cryopreservation, hepatocytes were cultured. Moreover, hepatocytes were transplanted into the spleen without a TGP capsule. The viability of hepatocytes that were cryopreserved in TGP was 71.2±2.3%. The hepatocytes demonstrated adequate survival, maintained their hepatic function in culture, and expressed albumin after transplantation to the rat spleen. We demonstrated a cryopreservation method of rat hepatocyte encapsulation using a TGP gel in the hydrogel state which subsequently allowed successful transplantation of unencapsulated hepatocytes in a sol state TGP gel at low temperature.
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