A method for regulating an expression level of Musashi1 in cells. In particular, the present application relates to a cell regulating composition capable of regulating the expression or activity, in cells, of any one selected from the followings: K19, α2β1 integrin, and Musashi1. The regulating composition can promote proliferation, growth, and migration of epidermal cells, promote proliferation, growth, and migration of vascular endothelial cells, and promote proliferation, growth, and migration of fibroblasts.
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