本研究探讨用多西环素调控IL 3基因表达的小鼠骨髓基质细胞系对小鼠造血干细胞增殖分化的促进作用。构建含小鼠IL 3基因逆转录病毒载体系统 ,转染小鼠骨髓基质细胞系 ,获得QXMSC1Tet on IL 3;体外加入多西环素诱导IL 3基因表达并检测IL ...本研究探讨用多西环素调控IL 3基因表达的小鼠骨髓基质细胞系对小鼠造血干细胞增殖分化的促进作用。构建含小鼠IL 3基因逆转录病毒载体系统 ,转染小鼠骨髓基质细胞系 ,获得QXMSC1Tet on IL 3;体外加入多西环素诱导IL 3基因表达并检测IL 3表达活性 ;观察细胞培养条件上清液对造血祖细胞集落形成单位的作用及QXMSC1Tet on IL 3与骨髓细胞共培养对造血干细胞增殖分化的影响。结果表明 :多西环素提高了QXMSC1Tet on IL 3细胞系IL 3的表达 ,促进骨髓造血祖细胞克隆形成数 ;与骨髓细胞共培养可促进造血干细胞的增殖分化。结论 :应用多西环素诱导外源基因转染的骨髓基质细胞IL 3的表达 。展开更多
C myc gene expression can be rapidly induced by IL 2 through intracellular signal transduction which is triggered by the interaction between IL 2 and its receptor （IL 2R）. JAK3 which associates to the intracellular ...C myc gene expression can be rapidly induced by IL 2 through intracellular signal transduction which is triggered by the interaction between IL 2 and its receptor （IL 2R）. JAK3 which associates to the intracellular domain of IL2R γ may play a critical role in this process. To reveal the action of JAK3 in c myc induction, a chimeric receptor gene IL2R α/γ/Δ NJAK3 is constructed which consists of extracellular domain derived from IL 2R α subunit （IL2R α）, the transmembrane sequence derived from IL2R γ and the cytoplasmic domain derived from the catalytic domain of JAK3 （Δ NJAK3）, and then transfected this chimeric gene into mouse fibroblast cell line L929 β which had been transfected with IL2R β gene and stably expressed IL2R β in high level. In the transfectants coexpressing IL2R β and α/γ/Δ NJAK3, the stimulation of IL2 could intensively induce c myc gene expression. Because the whole cytoplasmic domain of IL2R γ which could recruit signaling molecules was replaced by JAK3 and the c myc could be still induced by IL2 in this situation, the results here gave the direct evidence demonstrating that JAK3 plays an important role in c myc gene expression induced by IL2.展开更多
文摘本研究探讨用多西环素调控IL 3基因表达的小鼠骨髓基质细胞系对小鼠造血干细胞增殖分化的促进作用。构建含小鼠IL 3基因逆转录病毒载体系统 ,转染小鼠骨髓基质细胞系 ,获得QXMSC1Tet on IL 3;体外加入多西环素诱导IL 3基因表达并检测IL 3表达活性 ;观察细胞培养条件上清液对造血祖细胞集落形成单位的作用及QXMSC1Tet on IL 3与骨髓细胞共培养对造血干细胞增殖分化的影响。结果表明 :多西环素提高了QXMSC1Tet on IL 3细胞系IL 3的表达 ,促进骨髓造血祖细胞克隆形成数 ;与骨髓细胞共培养可促进造血干细胞的增殖分化。结论 :应用多西环素诱导外源基因转染的骨髓基质细胞IL 3的表达 。
文摘C myc gene expression can be rapidly induced by IL 2 through intracellular signal transduction which is triggered by the interaction between IL 2 and its receptor （IL 2R）. JAK3 which associates to the intracellular domain of IL2R γ may play a critical role in this process. To reveal the action of JAK3 in c myc induction, a chimeric receptor gene IL2R α/γ/Δ NJAK3 is constructed which consists of extracellular domain derived from IL 2R α subunit （IL2R α）, the transmembrane sequence derived from IL2R γ and the cytoplasmic domain derived from the catalytic domain of JAK3 （Δ NJAK3）, and then transfected this chimeric gene into mouse fibroblast cell line L929 β which had been transfected with IL2R β gene and stably expressed IL2R β in high level. In the transfectants coexpressing IL2R β and α/γ/Δ NJAK3, the stimulation of IL2 could intensively induce c myc gene expression. Because the whole cytoplasmic domain of IL2R γ which could recruit signaling molecules was replaced by JAK3 and the c myc could be still induced by IL2 in this situation, the results here gave the direct evidence demonstrating that JAK3 plays an important role in c myc gene expression induced by IL2.
