摘要
目的:观察GM-CSF对髓系白血病细胞(K562)生长、分化的影响作用。方法:采用PCR、T-A克隆及基因定向克隆技术,将rhGM-CSF基因插入PcDNA3.1(+)空载体中,构建了PcDNA3.1-rhGM-CSF真核表达载体。经限制性内切酶消化和DNA测序鉴定确认,转染人K562髓系白血病细胞、72小时后采用细胞形态学检测、MTT试验、免疫组化技术观察和分析PcD-NA3.1-rhGM-CSF在K562细胞中的表达及其影响该细胞生长与分化的作用。结果:①成功构建PcDNA3.1-rhGM-CSF真核细胞表达载体;②重组质粒PcDNA3.1-rhGM-CSF能在K562细胞中表达,并诱导K562细胞向单核细胞系、巨噬细胞系分化;③K562细胞增殖受到明显抑制。结论:成功构建了PcDNA3.1-rhGM-CSF真核细胞表达载体;转染K562细胞能向单核细胞系、巨噬细胞系分化。
Objective：To construct eukaryotic expressing vector of PcDNA3.1-rhGM-CSF and to investigate its effects of suppressing growth and inducing differentiation in K562 cells.Methods：The eukaryotic expressing vector PcDNA3.1-hGM-CSF was constructed by means of PCR and T-A clone techniques as well as directional cloning techniques.It was affirmed by the restriction map and DNA sequence analysis,and then transfected into K562 cells.It was observed that the target gene of the recombinant vector was expressed and exerted in K562 cells 72 h later,RT-PCR was used to affirm the expression of rhGM-CSF in K562 cells;Cell morphological,cell proliferation assay and immunohistochemistry were used to observe the effect of PcDNA3.1-rhGM-CSF on the growth and differentiation of K562 cells.Results：①The recombinant eukaryotic expressing vector PcDNA3.1-GM-CSF was constructed successfully;②Recombinant GM-CSF was expressed in the transfected K562 cells and the transfected K562 cells could differentiate into monocyte and macrophage cells;③ The proliferation of K562 cells was suppressed.Conclusion：The recombinant eukaryotic expression vector PcDNA3.1-rhGM-CSF was constructed successfully;Transfected K562 cell could differentiate into monocyte and macrophage cell.
出处
《中国免疫学杂志》
CAS
CSCD
北大核心
2010年第6期494-497,502,共5页
Chinese Journal of Immunology
基金
四川省科技厅项目资助(2009SZ0260)
