急性髓系白血病中组蛋白去甲基化酶KDM3B和JMJD1C的差异化表达

Differential expression of histone demethylase KDM3B and JMJD1C inacute myeloid leukemia

目的 探讨白血病中组蛋白去甲基化酶KDM3B和JMJD1C受到的协同调控。方法 在多个急性髓系白血病细胞株中采用细胞遗传学分析KDM3B和JMJD1C的拷贝数情况。在急性髓系白血病细胞株NB4和HL-60中,应用Daminozide进行处理,观察组蛋白H3K9单甲基化和二甲基化的情况。在急性髓系白血病细胞株NB4和HL-60中,应用Daminozide、ATRA（All-trans retinoid acid）、Vtamin C进行处理,通过实时定量PCR检测去甲基化酶KDM3B和JMJD1C的表达情况。结果 KDM3B和JMJD1C在不同的急性髓细胞白血病细胞系中拷贝数呈负相关。经Daminozide药物分别对NB4和HL-60细胞进行处理后,NB4细胞和HL-60细胞组的H3K9单甲基化和二甲基化的水平呈上升趋势。使用3种药物分别进行处理后,在NB4细胞中,KDM3B的m RNA下调,JMJD1C的m RNA水平上调;与之相反,在HL-60细胞中,表现为KDM3B的m RNA上调和JMJD1C的m RNA水平下调。结论 急性髓细胞白血病中JMJD1C和KDM3B呈负相关的表达趋势。

Objective To investigate the synergistic regulation of KDM3B and JMJD1C in leukemia. Methods The expression level o f JMJD1C and KDM3B were analyzed in multiple acute myeloid leukemia （AML） cell lines. AML cell lines NB4 and HL-60 were treated with Daminozide, followed by detennination of H3K9 mono-methylation and di-methylation. AML cell lines NB4 and HL-60 were treated with Daminozide, ATRA （retinoid acid All-trans）, C Vitamin and the expression of KDM3B and JMJD1C were detected by real-time quantitative PCR. Results The expression level of KDM3B and JMJD1C in the AML cell lines was negatively correlated. In NB4 and HL-60 cells treated by daminozide, H3K9 mono-methylation and di_ methylation level showed a rising trend in these two cell groups. After treatment of NB4 cells with the 3 reagents, the level of mRNA of KDM3B was down-regulated while the level of mRNA of JMJD1C was up-regulated. In HL-60 cells treated by daminozide, the tnRNA level of KDM3B was up-regulated and the mRNA level of JMJD1C was down-regulated. Conclusion The expression o f KDM3B and JMJD1C is negatively correlated in patients with AML.