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    • 9. 发明公开
    • METHOD FOR MASS PRODUCING HUMAN BLOOD COAGULATION FACTOR VII DERIVATIVE
    • VERFAHREN ZUR MASSENHUZEN EINES DERIVATS DES MENSCHLICHEN BLUTGERINNUNGSFAKTORS VII
    • EP3040419A4
    • 2017-03-15
    • EP14839952
    • 2014-08-27
    • HANMI PHARM IND CO LTD
    • KANG HEE CHULKIM JIN YOUNGLEE BYUNG SUNKIM HYUN UKCHOI IN YOUNGKWON SE CHANG
    • C12N15/12C07K14/745C12N9/06C12N9/64C12N15/85C12P21/02
    • C12N9/6437C07K14/745C12N9/003C12N15/85C12P21/02C12Y105/01003C12Y304/21021
    • The present invention provides a method for mass production of human coagulation factor VII derivatives, containing: a) constructing an expression vector, containing i) a nucleotide sequence of a dihydrofolate reductase promoter devoid of at least one CCGCCC repeat sequence from the GC-rich region thereof and a nucleotide sequence encoding a dihydrofolate reductase (DHFR) operably linked thereto, and ii) a nucleotide sequence of a cytomegalovirus (CMV) early gene promoter and a nucleotide sequence encoding a human coagulation factor VII derivative operably linked thereto; b) transfecting an animal cell line with the expression vector of step a); c) culturing the transfected animal cell line of step b) in the presence of a dihydrofolate reductase inhibitor to select a cell line capable of expressing the human coagulation factor VII derivative with high efficiency; and d) culturing the animal cell line selected from step c) by adding at least one selected from the group consisting of sodium butyrate, vitamin K, and a culture medium supplement. Employing a vector containing a DHFR promoter devoid of GC-rich repeat sequences, the present invention can express human coagulation factor VII derivates with high efficiency on a large scale, and thus can be useful for the preparation of therapeutic agents for hemophilia.
    • 本发明提供了一种大量生产人凝血因子VII衍生物的方法,其包含:a)构建表达载体,其含有i)不富含GC富集区的至少一个CCGCCC重复序列的二氢叶酸还原酶启动子的核苷酸序列 和编码与之有效连接的二氢叶酸还原酶(DHFR)的核苷酸序列,和ii)巨细胞病毒(CMV)早期基因启动子的核苷酸序列和编码与之有效连接的人凝血因子VII衍生物的核苷酸序列; b)用步骤a)的表达载体转染动物细胞系; c)在二氢叶酸还原酶抑制剂的存在下培养步骤b)的转染的动物细胞系,以高效率选择能够表达人凝血因子VII衍生物的细胞系; 和d)通过加入选自丁酸钠,维生素K和培养基补充剂中的至少一种来培养选自步骤c)的动物细胞系。 使用含有不富含GC的重复序列的DHFR启动子的载体,本发明可以大规模高效地表达人凝血因子VII衍生物,因此可用于制备血友病治疗剂。