REGENERATION AND NEOGENESIS OF RETINAL VISUAL CELL WITH OTX2 GENE
A medical drug characterized by containing Otx2 protein, its partial peptide or a salt thereof (a), or a DNA or RNA coding for Otx2 protein or its partial peptide (b). This medical drug is useful as a preventive, curative or progress suppressor of retinal diseases such as retinal degeneration. Also, this medical drug is useful as an inducer of differentiation, for example, from retinal stem cells to retinal visual cells in the transplantation of cells into the retina, etc. of patients suffering from retinal diseases.