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。

    Process for culturing biological material
    2.
    发明授权
    Process for culturing biological material 失效
    培养生物材料的方法

    公开(公告)号:US4840905A

    公开(公告)日:1989-06-20

    申请号:US106115

    申请日:1987-10-07

    摘要: A process for culturing biological material capable of multiplication, especially cells securely adhering to microcarriers, employs a bioreactor having a vessel for a culture medium having means for controlling the environmental conditions in the culture medium and a stirring device for the homogeneous distribution of the cells in the culture medium which has a rotary drive and a rotation axle running in the interior of the vessel, wherein the stirring device has at least one flat stirrer blade fixed on to the rotation axle and inclined to the rotation axle.

    摘要翻译: 用于培养能够增殖的生物材料,特别是牢固粘附于微载体的细胞的方法,采用具有培养基容器的生物反应器,其具有用于控制培养基中的环境条件的装置和用于均匀分布细胞的搅拌装置 所述培养介质具有在所述容器的内部运行的旋转驱动和旋转轴,其中所述搅拌装置具有固定在所述旋转轴上且与所述旋转轴倾斜的至少一个平板搅拌器叶片。

    Method for mammalian cell culture
    3.
    发明授权
    Method for mammalian cell culture 失效
    哺乳动物细胞培养方法

    公开(公告)号:US5286646A

    公开(公告)日:1994-02-15

    申请号:US763867

    申请日:1991-09-20

    IPC分类号: C12M3/06 C12N5/06

    CPC分类号: C12M29/16 C12M27/02

    摘要: The invention presents a method for the culturing of mammalian cells. This method involves the use of a bioreactor, which contains a sample of mammalian cells in a culture medium containing large molecules. Positioned inside the bioreactor is a semipermeable membrane which defines a space separated from the bioreactor by the semipermeable membrane. A nutrient medium flows through this separated space and, via virtue of the semipermeable nature of the separating membrane, nutrient pass therethrough into the culture medium, while cellular waste products pass into the separated space. The semipermeable membrane is selected so that the cells and large molecules, such as proteinaceous materials, cannot pass through the membrane, but remain in the bioreactor.

    摘要翻译: 本发明提出了哺乳动物细胞的培养方法。 该方法涉及使用含有大分子的培养基中的哺乳动物细胞样品的生物反应器。 定位在生物反应器内的是半透膜,其限定了通过半透膜与生物反应器分离的空间。 营养培养基流过该分离的空间,并且由于分离膜的半透性,营养物通过其进入培养基,而细胞废物进入分离的空间。 选择半透膜,使得细胞和大分子(例如蛋白质材料)不能通过膜,而是保留在生物反应器中。