Abstract: The virus stabilizer is a virus stabilizer comprising a gelatin hydrolysate and an aqueous medium, wherein the virus stabilizer contains the gelatin hydrolysate at not less than 1 mass % and not more than 20 mass %, the gelatin hydrolysate has a weight average molecular weight of not more than 10000, and the gelatin hydrolysate has an isoelectric point pH of not less than 4.0 and not more than 7.0.

Abstract: A gelatin or a chemically modified product thereof contains 10 to 50% by mass of a high-molecular weight component, and a low-molecular weight component in such an amount that a value obtained by subtracting a low-molecular weight component content from a high-molecular weight component content is greater than or equal to 0% by mass.

Abstract: A gelatin or a chemically modified product thereof contains 10 to 50% by mass of a high-molecular weight component, and a low-molecular weight component in such an amount that a value obtained by subtracting a low-molecular weight component content from a high-molecular weight component content is greater than or equal to 0% by mass.

Abstract: The present invention provides a human corneal endothelial cell sheet having a curvature fitting a human corneal endothelial surface, particularly, the human corneal endothelial cell sheet supported by a cell support having a curvature fitting a human corneal endothelial surface, and a production method of a human corneal endothelial cell sheet having a curvature fitting a human corneal endothelial surface, which includes the following steps: (1) a step of gelling a gelatin aqueous solution poured into a template having a curvature fitting a human corneal endothelial surface; (2) a step of forming a sheet-like gelatin by drying the gelled gelatin obtained in (1); (3) a step of obtaining a gelatin sheet by thermally crosslinking the sheet-like gelatin obtained in (2); (4) a step of seeding human corneal endothelial cells on the gelatin sheet obtained in (3) to form a human corneal endothelial cell layer.

Abstract: The object of the present invention is to provide: a hybrid material for regeneration of living body tissue, which can retain sufficient mechanical strength for a term needed to regenerate the tissue, and which simultaneously has moderate biodegradation absorbability which enables degradation and disappearance rapidly after the regeneration of the tissue. As means for solving the problems, the hybrid material for regeneration of living body tissue, according to the present invention, comprises a naturally-occurring polymer and a biodegradation-absorbable synthetic polymer, wherein the biodegradation-absorbable synthetic polymer exists in a fibrous form in a sponge including the naturally-occurring polymer, and wherein the naturally-occurring polymer is crosslinked.