【摘要】 用负向选择增富法成功地获得人GM-CSF cDNA克隆,筛选阳性率提高至1/170。用该cDNA转染的CDS-7细胞上清可测出集落刺激活性。经亚克隆化后在大肠杆菌表达出重组人GMCSF,可维持细胞株BMU-2的生长并促进急性非淋巴细胞白血病(ANLL)患者骨髓细胞的集落形成。更多还原

【Abstract】 One of the human GM-CSF cDNA was successfully isolated with a new screening method. Up 1/170 of positive rate was reached. The COS-7 cells were transfected with the cDNA clone and the resulting supernants contained colony-stimulatory activities. Human GM-CSF cDNA was also subcloned into a expression plasmid pKPL-2D and the unfused recombinant human GM-CSF was expressed in E. coli. The expressed products could maintain in vitro the growth of a cell line BMU- 2 and stimulate its colony formation. In addition, it could increase the colony formation of bone marrow cells from the patients with acute non-lymphatic leukemia (ANLL).更多还原