PROBLEM TO BE SOLVED: To clarify the expression level of a gene associated with EP action, thereby providing the use of such an EP action expression-related gene.SOLUTION: This invention provides a gene expression method that comprises administering EP to an animal cell to thereby promote the expression of one or plural genes selected from a first gene group, and inhibit the expression of one or plural genes selected from a second gene group.COPYRIGHT: (C)2015,JPO&INPIT