A gene exhibiting stronger expression in mouse IMC-HM cells than in mouse IMC-LM cells and isolated by using the differential display method. When the relation between the expression of the isolated gene and cancerous metastasis is examined, it is found out that a transformant with the larger expression dose of the antisense mRNA to the gene shows the more lowered cancerous metastasis ability. By using the isolated protein, cancerous metastasis inhibitors can be screened.
展开▼