This invention relates to a method for controlling the production of gene product in cells, comprising the step of introducing a material containing a complementary sequence of the mRNA base sequence corresponding said gene product or its precusor, or a material being able to exist in cell and having the same action, into cells, to increase the production of said gene product.本發明係有關細胞內基因產物產生量之控制方法,包含在細胞內導入含有與上述基因產物之mRNA鹼基序列為互補序列之物質或其前驅體,或導入在細胞內可具有與該等同等作用之物質之步驟,而增大上述基因產物之產生量。無元件符號