This invention discloses a process for producing tissue plasminogen activator. The process comprises cultivating Escherichia coli, yeast, or mammalian cells into which the vector having the gene for human tissue plasminogen activator (tPA) has been introduced by the recombinant DNA technology. In the cultivation or purification process, a specific anti-plasmin agent, which is one of the protease inhibitors, is added to the medium and/or the buffer solutions used for purification, so as to prevent the conversion of single-chain form tPA into double-chain form tPA by a protease which is present in the medium.
本发明公开了一种生产组织纤溶酶原激活剂的工艺。该工艺包括培养大肠杆菌、酵母或哺乳动物细胞,通过
重组 DNA 技术将具有人组织纤溶酶原激活剂(tPA)
基因的载体导入这些细胞中。在培养或纯化过程中,在
培养基和/或用于纯化的缓冲溶液中加入特定的抗plasmin剂(蛋白酶抑制剂之一),以防止
培养基中存在的
蛋白酶将单链形式的tPA转化为双链形式的tPA。