Gel material for regenerative medicine

A kit for producing a gel material for regenerative medicine, the kit comprising the following two types of solutions (A) and (B) stored without being mixed with each other:

• (A) an aqueous solution containing a hydrophilic first raw polymer having a concentration of less than an overlapping concentration and equal to or more than a critical gelation concentration;
• and
• (B) an aqueous solution containing a hydrophilic second raw polymer having a concentration of less than an overlapping concentration and equal to or more than a critical gelation concentration;
• wherein the solution (A) and/or the solution (B)further contains a non-reactive polymer having no functional group capable of crosslinking with the raw polymer in the molecule,
• a polymer gel obtained by mixing the solutions (A) and (B) is a polymer gel in which the first raw polymer and the second raw polymer are crosslinked with each other, and
• the polymer gel has a structure including two regions:
• a first region in which polymer units derived from the raw polymers are densely present and a second region in which polymer units derived from the raw polymers are sparsely present.

A kit for producing a gel material for regenerative medicine, the kit comprising the following two types of solutions (A′) and (B′) stored without being mixed with each other:

• (A′) an aqueous solution containing a first gel precursor, wherein the first gel precursor is obtained by crosslinking hydrophilic raw polymers under conditions of less than an overlapping concentration and less than a critical gelation concentration, and the first gel precursor has a relationship of G′ < G″ between a storage modulus G′ and a loss modulus G″;
• and
• (B′) an aqueous solution containing a second gel precursor, wherein the second gel precursor is obtained by crosslinking hydrophilic raw polymers under conditions of less than an overlapping concentration and less than a critical gelation concentration, and the second gel precursor has a relationship of G′ < G″ between a storage modulus G′ and a loss modulus G″;
• wherein the solution (A′) and/or the solution (B′)further contains a crosslinking agent,
• a polymer gel obtained by mixing the solutions (A′) and (B′) is a polymer gel in which the first raw polymer and the second raw polymer are crosslinked with each other, and
• the polymer gel has a structure including two regions:
• a first region in which polymer units derived from the raw polymers are densely present and a second region in which polymer units derived from the raw polymers are sparsely present.