儿童急性淋巴细胞白血病单个核细胞转铁蛋白受体2表达及其意义

目的 研究急性淋巴细胞白血病(ALL)患儿单个核细胞转铁蛋白受体2(TFR2)基因表达情况,分析其与儿童ALL不同预后因素的相关性.方法 采用荧光定量逆转录聚合酶链反应法测定56例新发ALL患儿和15例对照患儿骨髓或外周血单个核细胞TFR2相对表达量.结果 泼尼松敏感组患儿TFR2相对表达量(中位数为0.0848)显著高于泼尼松不敏感组(中位数为0.0126,P=0.038).低危组、中危组和高危组TFR2相对表达量的中位数分别为0.1677、0.0728和0.0125.差异具有统计学意义(P=0.003).初诊时外周血白细胞(WBC)计数WBC<50×109/L、(50～100)×103/L和≥loo×103/L 3组患儿TFR2相对表达量的中位数分别为0.0974、0.0294和0.0078,差异也具有统计学意义(P=0.013).另外,B细胞ALL,和T细胞ALL患儿TFR2相对表达量的中位数分别为0.0636和0.0065,B细胞型TFR2表达水平显著高于T细胞型(P=0.004).秩相关统计分析表明,ALL患儿单个核细胞TFR2表达量与初始外周WBC总数、外周血幼稚细胞比例、幼稚细胞绝对计数的秩相关系数分别为-0.398、-0.307、-0.421,具有负相关关系(P分别为0.003、0.022、0.001).结论 TFR2可能为儿童ALL一个新的分子生物学预后因素,在ALL患儿预后评估和指导个体化治疗方面可能具有临床应用价值.

Expression of Transferrin Receptor 2 in Mononuclear Cells from Children with Acute Leukemia

Objective To study the expression of TFR2 mRNA in mononuclear cells of bone marrow and peripheral blood from children with acute lymphoblastic leukemia,and to explore possible correlations between TFR2 expression and a panel of prognostic/risk factors.Methods Bone marrow or peripheral mononuclear cells were isolated from 56 children with newly diagnosed acute lymphoblastic leukemia(ALL)and 15 normal children as control.TFR2 mRNA expression level in mononuclear cell was determined by real-time fluorescence q...