Production of plasminogen activator from cells to which lectin is added
to the culture medium
    1.
    发明授权
    Production of plasminogen activator from cells to which lectin is added to the culture medium 失效
    从添加凝集素的细胞向培养基中生产纤溶酶原激活物

    公开(公告)号:US5002877A

    公开(公告)日:1991-03-26

    申请号:US465111

    申请日:1990-02-22

    CPC分类号: C12N9/6459 C12Y304/21069

    摘要: Increased yields of enzymes, particularly tissue plasminogen activator (tPA), are produced from cells, particularly CNCM I-222 cells, by a process using less concentrated lectin, particularly concanavalin A, in culture medium added to replace initial growth medium than has been used hitherto. After first harvesting of enzyme in supernatants, the culture can be reactivated by the addition of fresh culture medium containing an even lower lectin concentration, and a further harvest of enzyme obtained. The two harvests of enzyme together can give a greater overall yield than a single harvest after a single induction step employing the conventionally used higher lectin concentrations. Enzyme yield can be further increased by repeating the last incubation step once or twice to obtain one or two further harvests.

    摘要翻译: PCT No.PCT / GB88 / 00758 Sec。 371日期1990年2月22日 102(e)日期1990年2月22日PCT提交1988年9月16日PCT公布。 出版物WO89 / 02917 日本1989年4月6日。通过使用较少浓缩的凝血素(特别是伴刀豆球蛋白A)的方法,在细胞,特别是CNCM I-222细胞中,增加酶的产量,特别是组织纤溶酶原激活物(tPA) 初始生长培养基比迄今为止使用过。 在上清液中首次收获酶后,可以通过加入含有甚至更低凝集素浓度的新鲜培养基来再培养培养物,并进一步收获获得的酶。 在采用常规使用的较高凝集素浓度的单一诱导步骤之后,酶的两次收获可以比单次收获产生更大的总产量。 通过重复最后一次孵育步骤一次或两次可以进一步提高酶产量,以获得一个或两个进一步收获。