Material for tissue organ regeneration and method of tissue/organ regeneration

A method of regenerating a tissue or organ, comprising:

• providing a tissue or organ regeneration material comprising, at least a hydrogel-forming polymer;
• an aqueous solution of the hydrogel-forming polymer showing a thermo-reversible sol-gel transition such that it assumes a sol state at a lower temperature and assumes a gel state at a higher temperature;
• fibroblasts showing substantially no growing property in a gel based on the hydrogel-forming polymer;
• pouring the tissue or organ regeneration material into a necrotic or defective area of a tissue and/or an organ;
• the tissue or organ regeneration material assuming a sol state at a temperature lower than the sol-gel transition temperature thereof, so that the tissue or organ regeneration material is converted into a gel state by a body temperature, and is placed in the necrotic or defective area;
• and
• regenerating the tissue and/or organ.