Clinical significance of peripheral blood minimal residual disease detection at the eighth day of induction therapy in children with B-cell acute lymphoblastic leukemia
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摘要:目的
基于TARGET数据库分析诱导治疗第8天外周血微小残留病(MRD)检测在急性B淋巴细胞白血病(B-ALL)患儿预后评估中的临床意义。
方法下载TARGET数据库中2000—2010年诱导治疗第8天外周血MRD和第29天骨髓MRD资料完整的359例B-ALL患儿的数据。采用Spearman相关分析法探讨第8天外周血MRD与同期骨髓细胞形态学的相关性。采用Kaplan-Meier曲线分析第8天外周血MRD与无事件生存(EFS)的关系, 并分析第8天外周血MRD联合第29天骨髓MRD与EFS率的关系。采用Cox回归分析探讨B-ALL患儿预后的危险因素。
结果Spearman相关分析显示,第8天外周血MRD与同期骨髓原始细胞占比呈正相关(r=0.620, P < 0.001)。生存曲线显示,第8天外周血MRD < 0.01%、0.01%~ < 0.10%、0.10%~ < 1.00%、≥1.00%患儿的5年EFS率比较,差异有统计学意义(P < 0.001)。第8天外周血MRD与第29天骨髓MRD检测结果双阴性者预后最佳,单阳性者次之,双阳性者预后最差,差异有统计学意义(P < 0.001)。第29天骨髓MRD阴性患儿中,第8天外周血MRD阴性者的5年EFS率高于第8天外周血MRD阳性者,差异有统计学意义(P=0.009)。Cox回归分析显示,第8天外周血MRD≥0.10%(HR=1.967, 95%CI为1.234~3.134, P=0.004)、第29天骨髓MRD≥0.01%(HR=2.076, 95%CI为1.423~3.027, P < 0.001)均为B-ALL患儿EFS的独立危险因素。
结论诱导治疗第8天外周血MRD在儿童B-ALL预后评估中具有重要的临床意义,可作为第29天骨髓MRD的强有力补充。
Abstract:ObjectiveTo analyze clinical significance of peripheral blood minimal residual disease (MRD) detection at the eighth day of induction therapy in evaluating prognosis of children with B-cell acute lymphoblastic leukemia (B-ALL) based on the TARGET database.
MethodsData of 359 B-ALL children with peripheral blood MRD at the eighth day of induction therapy and bone marrow MRD at 29th day of induction therapy from year 2000 to 2010 were downloaded from TARGET database. Spearman correlation analysis was used to explore the association between peripheral blood MRD at the eighth day and morphology of bone marrow cells in the same period. Kaplan-Meier curve was used to analyze the relationship between peripheral blood MRD at the eighth day and event free survival (EFS), and further analyze the relationship of combined detection of peripheral blood MRD at the eighth day and bone marrow MRD at 29th day with EFS. Cox regression model was used to analyze the risk factors for prognosis in B-ALL children.
ResultsSpearman correlation analysis showed that the level of peripheral blood MRD at the eighth day was positively correlated with the proportion of bone marrow blasts at day 8 (r=0.620, P < 0.001). Survival analysis showed that there were significant differences in 5-year EFS rates of MRD < 0.01%, 0.01% to 0.10%, 0.10% to 1.00% and ≥ 1.00% in peripheral blood at the eighth day(P < 0.001). Double-negative patients with peripheral blood MRD at the 8th day and bone marrow MRD at the 29th day had the best prognosis, followed by single-positive patients, and double-positive patients had the worst prognosis, the differences were statistically significant (P < 0.001). The combined MRD at both time points showed that the prognosis was best in the double-negative group, followed by the single-positive group and worst in the double-positive group (P < 0.001). In children with negative bone marrow MRD at day 29, the 5-year EFS rate of children negative for MRD in peripheral blood at the eighth day was significantly higher than those positive for MRD in peripheral blood at the eighth day(P=0.009). Cox regression analysis showed that MRD ≥ 0.10% in peripheral blood on day 8(HR=1.967; 95%CI, 1.234 to 3.134; P=0.004), MRD ≥ 0.01% in bone marrow on day 29 (HR=2.076; 95%CI, 1.423 to 3.027; P < 0.001) were independent risk factors for EFS in B-ALL children.
ConclusionPeripheral blood MRD at day 8 of induction therapy has important clinical significance in prognosis assessment in children with B-ALL, and can be used as a strong supplement for the prognosis assessment of B-ALL children with bone marrow MRD at day 29.
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表 1 359例B-ALL患儿的临床特征分析
特征 分类 [n(%)] 性别 男 219(61.0) 女 140(39.0) 年龄 < 10岁 176(49.0) ≥10岁 183(51.0) 白细胞 < 50×109/L 219(61.0) ≥50×109/L 140(39.0) TCF3-PBX1基因 阴性 321(89.4) 阳性 38(10.6) ETV6-RUNX1基因 阴性 324(90.3) 阳性 35(9.7) 4号和10号染色体三倍体 阴性 324(90.3) 阳性 35(9.7) MLL基因重排 阴性 337(93.9) 阳性 22(6.1) BCR-ABL1基因 阴性 353(98.3) 阳性 6(1.7) DNA指数 < q1.16 308(85.8) ≥1.16 51(14.2) 第8天骨髓原始细胞占比 < 20% 219(61.0) ≥20% 140(39.0) 第29天骨髓原始细胞占比 < 5% 349(97.2) ≥5% 10(2.8) 第8天外周血MRD < 0.01% 45(12.5) 0.01%~ < 0.10% 65(18.1) 0.10%~ < 1.00% 114(31.8) ≥1.00% 135(37.6) 第29天骨髓MRD < 0.01% 227(63.2) 0.01%~ < 0.10% 47(13.1) 0.10%~ < 1.00% 54(15.0) ≥1.00% 31(8.6) MRD: 微小残留病。 表 2 B-ALL患儿EFS的单因素和多因素Cox回归分析
变量 单因素分析 多因素分析 HR 95%CI P HR 95%CI P 年龄 1.205 0.859~1.688 0.280 — — — 白细胞 1.466 1.047~2.053 0.026 1.287 0.914~1.813 0.149 DNA指数 0.330 0.162~0.675 0.002 0.250 0.087~0.716 0.010 ETV6-RUNX1基因 0.412 0.192~0.881 0.022 0.540 0.250~1.170 0.118 4号和10号染色体三倍体 0.427 0.200~0.914 0.028 1.541 0.501~4.736 0.450 MLL基因重排 1.560 0.841~2.894 0.159 — — — TCF3-PBX1基因 1.253 0.744~2.112 0.396 — — — BCR-ABL1基因 1.622 0.516~5.095 0.407 — — — 第8天骨髓原始细胞占比 1.866 1.332~2.613 < 0.001 1.070 0.731~1.567 0.726 第29天骨髓原始细胞占比 4.404 2.236~8.676 < 0.001 2.636 1.309~5.307 0.007 第8天外周血MRD 2.502 1.609~3.890 < 0.001 1.967 1.234~3.134 0.004 第29天骨髓MRD 2.720 1.937~3.820 < 0.001 2.076 1.423~3.027 < 0.001 MRD: 微小残留病。 -
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