鱼藤素对K562细胞nup98表达的影响

Effect of Deguelin on Expression of nup98 in K562 Cells

本研究观察鱼藤素对白血病细胞株K562细胞核孔蛋白nup98表达的影响。用MTT比色法检测细胞增殖活性;流式细胞术及RT-PCR法分析鱼藤素作用K562细胞后nup98蛋白及mRNA含量的变化。结果表明:鱼藤素能显著抑制K562细胞的增殖,并与作用时间和鱼藤素浓度呈依赖关系;空白对照组K562细胞nup98蛋白表达的平均荧光强度为34.22±1.63,显著高于阴性对照组(2.83±0.02,P<0.01),10nmol/L鱼藤素即能显著抑制nup98蛋白的表达;10nmol/L鱼藤素对nup98mRNA表达的抑制作用不显著,20、40、80、160nmol/L鱼藤素能显著抑制nup98mRNA的表达,并且呈剂量依赖性。结论:鱼藤素可通过抑制核孔蛋白nup98的表达进一步抑制K562细胞的增殖。nup98可能成为急性白血病治疗的基因靶点。

The study was purposed to investigate the effect of deguelin on expression of nucleoporin 98 （ nup98 ） in leukemia K562 cells. MTT assay was used to assess the effects of deguelin on cell proliferation. FCM and RT-PCR were used to analyze the changes of nup98 mRNA and protein in K562 cells after treating with deguelin. The results showed that deguelin inhibited the proliferation of K562 cells in a time- and dose-dependent manner; mean fluorescence intensity of nup98 in blank group （ 34.22 ± 1.63 ） was significantly higher than that in control group （ 2.83 ± 0.02, P 〈 0.01 ）, 10 nmol/L deguelin could significantly inhibit the expression of nup98 protein; 10 nmol/L could not inhibit the expression of nup98 mRNA, 20, 40, 80,160 nmol/L deguelin could significantly inhibit the expression of nup98 mRNA in a dose- dependant manner. It is concluded that deguelin inhibits the proliferation of K562 cell through inhibiting the expression of nup98, and may be considered as a new target for therapy of acute leukemia,