Among cardiovascular diseases, cerebral infarction, ischemic stroke, and myocardial infarction are all related to thrombi formed by the coagulation of fibrin and platelets, and the current clinical application of thrombolytic agents including urokinase, tissue plasminogen activator (t-PA) and streptokinase all have serious side effects such as bleeding or gastric ulcer [1,2]. The gene discussed is PLAT; the disease is gastric ulcer.