急性白血病患者骨髓细胞中TIMP3、RUNX3蛋白表达情况检测及其临床意义

目的： 检测急性白血病(AL)患者骨髓细胞中的TIMP3、RUNX3蛋白表达的情况及其与基因甲基化的关系,并探讨其与AL患者预后的关系。方法: 采用Western blotting检测50例AL患者骨髓单个核细胞(BMMCs)及10例健康供者外周血单个核细胞(PBMCs)中TIMP3、RUNX3蛋白表达的情况,结合前期实验中TIMP3、RUNX3启动子区域甲基化检测结果,对与AL患者预后有关的因素进行统计分析。结果: 50例AL患者BMMCs中RUNX3甲基化组该蛋白表达明显少于未甲基化组及正常对照组(P<0.05),AL患者完全缓解(CR)率与RUNX3蛋白表达及骨髓中原始细胞比例有关,RUNX3蛋白失表达、骨髓中原始细胞比例高的患者CR率低,反之较高。结论: RUNX3启动子区域甲基化是导致该蛋白失表达的原因,其参与了AL的发病,并与不良预后有关,TIMP3甲基化与急性白血病发病无关。

Protein expression of TIMP3 and RUNX3 in bone marrow mononuclear cells from acute leukemia patients

AIM: To detect the protein expression of TIMP3 and RUNX3 in bone marrow mononuclear cells (BMMCs) from acute leukemia (AL) patients and to investigate the relationship between the methylation status of genes and their expressional levels. METHODS: Protein expression of TIMP3 and RUNX3 in 50 samples of BMMCs and 10 samples of peripheral blood mononuclear cells (PBMCs) from healthy volunteers was detected by Western blotting. The prognostic factors related to AL and data from methylation specific polymerase chain reaction were also analyzed. RESULTS: The expression level of RUNX3 with methylation was less than that without methylation in BMMCs from AL patients. The complete remission (CR) rate was related to RUNX3 expression and blasts in bone marrow (BM). BMMCs from patients with silencing of RUNX3 and higher blasts in BM had a lower CR rate. CONCLUSION: Absence of RUNX3 protein expression resulting from methylation of RUNX3 promoter probably plays a role in the pathogenesis of AL and is of value in prognosis. No relationship between methylation of TIMP3 promoter and the pathogenesis of AL is observed.