[Increase of cellular fibrinolysis in human lung cancer cell line by radiation: relationship between urokinase-type plasminogen activator (uPA) and metastasis and invasion].

It is well known that urokinase-type plasminogen activator (uPA) activates fibrinolysis of tumor cells and accelerates their metastasis and invasion. Human adenosquamous cell line, AOI cells, were stimulated to produce and accumulate of uPA by radiation. In AOI cells, there was relationship between uPA production and accumulation and the radiation doses. It was suggested that radiation had the possibility to accelerate the metastasis and invasion by increasing the production and accumulation of uPA from cancer cells.