In most cases, induced pluripotent stem (iPS) cells must be maintained by replacing basic fibroblast growth factor (bFGF)-containing medium daily to inhibit spontaneous differentiation. However, complete inhibition of differentiation is difficult to achieve even with frequent replacement of medium because of bFGF instability. Here, we established a novel system for the sustained release of bFGF from a modified surface by using a nanofilm fabrication method. This journal is
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