尿激酶是治疗血栓和动脉硬化的有效药物。尿激酶是从纯人尿中提取的，在每公斤纯人尿中只能提取百万分之五克，因此药物价格昂贵。日本宫崎大学生物研究所从蚯蚓中提取尿激醉获得成功，大约每百余蚯蚓可以提取尿激胡万分之一克，目前这种尿激团药物已投入市场。由于这一研究成 Urokinase is an effective drug for the treatment of thrombosis and arteriosclerosis. Urokinase is extracted from pure human urine and can only extract five parts per million of urine per kilogram of pure human urine, so the drug is expensive. Institute of Biology, Miyazaki University, Japan, from the earthworms extract urine to be successful, about every hundred earthworms can extract urinary Hu million grams, the current urinary drug drugs have been put on the market. Due to this research into