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    • 7. 发明授权
    • Recombinant human granulocyte-macrophage-colony stimulating factor
(GM-CSF)
    • 重组人粒细胞巨噬细胞集落刺激因子(GM-CSF)
    • US5891429A
    • 1999-04-06
    • US466308
    • 1995-06-06
    • Steven C. ClarkRandal J. KaufmanGordon G. WongElizabeth A. Wang
    • Steven C. ClarkRandal J. KaufmanGordon G. WongElizabeth A. Wang
    • A61K38/00C07K14/535C12N15/27C12N15/70C12N15/81C12N15/85A61K38/19C07K1/20
    • C12N15/85C07K14/535C12N15/70C12N15/81A61K38/00C12N2800/206C12N2830/00C12N2830/702C12N2840/105C12N2840/44
    • A method for preparing and isolating a transformation vector containing CSF/cDNA is described. The method comprises:preparing RNA from a cell that produces CSF;preparing polyadenylated messenger RNA from said RNA;preparing single stranded cDNA from said messenger RNA;converting the single stranded cDNA to double stranded cDNA;inserting the double stranded cDNA into transformation vectors and transforming bacteria with said vector to form colonies;picking pools of 200 to 500 colonies each and isolating plasmid DNA from each pool;transfecting the plasmid DNA into suitable host cells for expressing CSF protein;culturing the transfected cells and assaying the supernatant for CSF activity; andselecting CSF positive pools and screening the colonies used to make the pool to identify a colony having CSF activity. Also described are a cDNA coding for a protein having CSF activity (i.e. CSF/cDNA), a microorganism or cell line transformed with a recombinant vector containing such CSF/cDNA, and a method for producing CSF protein by expressing said CSF/cDNA by culturing a microorganism or cell line. The invention also provides a method of purifying the CSF proteins and the purified proteins so produced.
    • 描述了制备和分离含有CSF / cDNA的转化载体的方法。 该方法包括:从产生CSF的细胞制备RNA; 从所述RNA制备聚腺苷酸化的信使RNA; 从所述信使RNA制备单链cDNA; 将单链cDNA转化为双链cDNA; 将双链cDNA插入转化载体并用所述载体转化细菌以形成菌落; 分别取200至500个菌落的池,每个池中分离出质粒DNA; 将质粒DNA转染到合适的宿主细胞中以表达CSF蛋白; 培养转染的细胞并测定上清液的CSF活性; 并选择CSF阳性池并筛选用于制备池的菌落以鉴定具有CSF活性的菌落。 还描述了编码具有CSF活性的蛋白质(即CSF / cDNA)的cDNA,用含有这种CSF / cDNA的重组载体转化的微生物或细胞系,以及通过培养表达所述CSF / cDNA来产生CSF蛋白的方法 微生物或细胞系。 本发明还提供了纯化CSF蛋白质和如此制备的纯化蛋白质的方法。