细胞周期素A的特异反义脱氧寡核苷酸对K562细胞增殖的调控作用

目的　探讨细胞周期素A(CyclinA)的特异反义脱氧寡核苷酸 (ASON)对K5 6 2细胞增殖的调控作用。方法　采用反义技术将CyclinA特异的ASON与K5 6 2细胞共培养后 ,用台盼蓝拒染法绘制生长曲线、并做CFU K5 6 2克隆培养 ,流式细胞术进行A蛋白检测。结果　CyclinA特异的ASON组与正义脱氧寡核苷酸 (SON)组及空白对照组相比 ,能特异地抑制CyclinA蛋白水平的表达 (P <0 .0 1) ;而且当ASON的浓度达到一定程度时 ,K5 6 2细胞的增殖及集落形成率均明显受抑制 (P <0 .0 1)。结论　ASON能特异封闭CyclinA蛋白水平 ,并能抑制K5 6 2细胞的增殖 ,但有明显的浓度依赖性。

The study of cyclin A antisense oligodeoxynucleotides on proliferation regulation of K562 cell

Objective To investigate the effect of cyclin A antisense oligodeoxynucleotide (ASON) on mediating proliferation of K562 cell. Method After in vitro co-culture of cyclin A ASON with K562 cell, cyclin A protein expression levels were measured by flow cytometry. Cell growth was detected by trypan blue dye exclusion and colony-forming experiment. Results In cyclin A ASON group, cyclin A protein expression was significantly inhibited, compared to those in sense oligodeoxynucleotide (SON) group and blank group. Moreover, when the ASON concentration increased, the proliferation ratio of K562 cells and the CFU- K562 were significantly inhibited. Conclusion Cyclin A ASON can specifically inhibit cyclin A protein expression as well as inhibit the K562 cell proliferation and can lead to leukemic cell apoptosis. The effect of cyclin A ASON is concentration dependent.