| abstract |
It is intended to efficiently establish a feeder cell usable in culturing embryonic stem cells including human embryonic stem cells from a restricted donor-origin material to thereby provide a medium for preparing feeder cells for embryonic stem cells enabling culture with little risk of infection. It is also intended to provide a method of producing feeder cells which are relatively safe in the case of culturing together with embryonic stem cells including human embryonic stem cells, and feeder cells thus obtained. By using a medium for preparing feeder cells for embryonic stem cells obtained by adding at least serum albumin and insulin to a basal medium, it is possible to culture, in a stable state, a mass of cells including at least one type of cells available as feeder cells for embryonic stem cells which are selected from among fetal epidermal fibroblasts, fetal muscular fibroblasts, fetal pulmonary fibroblasts, fetal epithelial cells, fetal endothelial cells, adult epidermal fibroblasts, adult pulmonary fibroblasts, adult epithelial fibroblasts and adult epidermal fibroblasts. |