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    • 5. 发明申请
    • LOW FUCOSE CELL LINES AND USES THEREOF
    • 低FUCOSE细胞系及其用途
    • WO2012120500A2
    • 2012-09-13
    • PCT/IL2012/000109
    • 2012-03-05
    • MERCK SERONO S.A.HELMAN, DanielBAR-SHIMON, MeiravTOISTER-ACHITUV, Mira
    • HELMAN, DanielTOISTER-ACHITUV, Mira
    • C12N15/10
    • C07K16/2863C07K16/00C07K2317/41C07K2319/30C12N9/0006C12N9/1051C12N9/88C12N15/01C12N15/85C12Y101/01271C12Y204/01068C12Y402/01047
    • A method of selecting cells having zero fucose level useful as host cells for expressing recombinant proteins is disclosed. The method comprises: (d) introducing genetic mutations into a population of CHO cells by contacting the cells with a methotrexate (MTX), (e) contacting the population of CHO cells comprising mutated cells with a non-toxic fucose binding agent for an amount of time that allows binding of the fucose binding agent to a fucose moiety on a cell membrane of the population of cells, wherein the amount of time does not allow killing of the cells; and (f) depleting from the population of cells comprising mutated cells, a subpopulation of cells which bind the fucose binding agent, thereby selecting cells useful as host cells for expressing recombinant proteins, the selected cells having zero fucose content. There are also disclosed cells and cell lines useful as host cells for expressing recombinant proteins.
    • 公开了选择具有用作表达重组蛋白的宿主细胞的零岩藻糖水平的细胞的方法。 该方法包括:(d)通过使细胞与甲氨蝶呤(MTX)接触,将遗传突变引入CHO细胞群体;(e)使包含突变细胞的CHO细胞群与无毒岩藻糖结合剂的量接触一定量 的时间,其允许岩藻糖结合剂与细胞群的细胞膜上的岩藻糖部分结合,其中所述时间量不允许杀死细胞; 和(f)从包含突变细胞的细胞群体中消耗,细胞结合岩藻糖结合剂的细胞亚群,从而选择用作表达重组蛋白质的宿主细胞的细胞,所选择的细胞具有零岩藻糖含量。 还公开了可用作表达重组蛋白的宿主细胞的细胞和细胞系。