Osaka University

Kyoto University

Japan Institute of Leather Research

Sugiko Futaki

Kiyotoshi Sekiguchi

Norio Nakatsuji

Shunji Hattori

Hirofumi Suemori

Eihachiro Kawase

Yoh-ichi Koyama

Yukimasa Taniguchi

Takamichi Miyazaki

Ryoko Sato

Maria Hayashi

Hitomi Fujisaki

The present invention provides a culture substrate which enables maintenance culture of human pluripotent stem cells in a pluripotent state under a feeder-free culture environment, and a culture method of human pluripotent stem cells using the culture substrate. By seeding human pluripotent stem cells dissociated into single cells at a cell density of 4&#xd7;10to 10&#xd7;10cells/cmonto a culture substrate coated with human laminin &#x3b1;5&#x3b2;1&#x3b3;1 E8 fragment or human laminin &#x3b1;3&#x3b2;3&#x3b3;2 E8 fragment preferably at a concentration of 0.5 to 25 &#x3bc;g/cm, the human pluripotent stem cells can be rapidly expanded in a pluripotent state.

Culture substrate for human pluripotent stem cells and use thereof

It is an object of the present invention to provide a Type I-Type IV collagen hybrid gel, which maintains characteristics of a Type IV collagen and is superior in gel strength. It is the Type I-Type IV collagen hybrid gel obtained by mixing 100 to 500 parts by mass of the Type I collagen having fibrosis ability, relative to 100 parts by mass of the Type IV collagen having gelling ability. A three-dimensional structure is formed, where a membrane-like substance by the Type IV collagen is formed onto a fibrous substance by the Type I collagen, so as to be able to provide cell culture environment approximate to a basement membrane of a living body.

Type I-type IV collagen hybrid gel

Growing community of inventors

Osaka, Japan

Sugiko Futaki