氯化高铁血红素诱导K562细胞中β-珠蛋白基因表达的研究  

A Study of Inductive Effect of Hemin on Expression of the β-globin Genes in K562 Cells

作　　者：贾春平[1] 陈美珏[1] 黄淑帧[1] 曾溢滔[1] 

机构地区：[1]上海市儿童医院上海医学遗传研究所,上海200040

出　　处：《遗传》2002年第4期399-402,共4页Hereditas（Beijing)

基　　金：国家自然科学基金(NO.39893320)资助项目;上海市卫生局青年基金(NO.131014Y16)资助项目

摘　　要：以绿色荧光蛋白（EGFP）基因为报道基因,构建了在β-珠蛋白启动子驱动及HS2元件调控下的重组表达载体HG,用脂质体转染法将其转染到K562细胞中,并用RT-PCR方法及流式细胞仪检测氯化高铁血红素（Hm）对K562细胞中β-珠蛋白基因表达及重组载体HG在K562细胞中瞬时表达的影响。结果显示:用30μmol/L Hm诱导K562细胞24、28及72h后,不仅其γ-珠蛋白mRNA水平升高,其β-珠蛋白mRNA水平也明显上升,而且这种诱导作用在诱导24、48h后比较明显;Hm还可增强重组表达载体HG在K562细胞中的瞬时表达。提示Hm诱导红系分化的机理可能与γ-β-珠蛋白基因的转换机制相关。The recombinant plasmid HG was constructed,in which the reporter gene encoding the enhanced green flu-orescent protein (EGFP) was driven by the β-globin promoter and regulated under the HS2 element. The inductive effect of hemin on the expression of the β-globin gene and transiently transfected β-globin genes in K562 cells was analysed by FACS as well as RT CR method. The results showed that the level of γ and β-globin gene mRNA in K562 cells increased significantly after 24,48 and 72 hours induced with 30 μmol/LHm. And this inductive effect was sronger after 24 and 48 hours. Furthermore, the transient expression of plasmid HG in K562 cells increased significantly with hemin induction. These results indicated that the mechanism of inductive erythroid differentiation with hemin may be correlated with mechanism of γ-β-globin gene.

关 键 词：氯化高铁血红素 诱导 K562细胞 Β-珠蛋白 基因表达 

分 类 号：Q756[生物学—分子生物学]