目的 讨论骨髓残存造血评估指标对再生障碍性贫血(AA)患者免疫抑制治疗(IST)疗效预测的价值.方法 回顾性分析38例重型/极重型AA(SAA/VSAA)患者病例资料,将患者治疗前外周血网织红细胞绝对计数(Ret)、中性粒细胞绝对计数(ANC)、血清可溶性转铁蛋白受体(sTfR)及矫正血清血小板生成素(TPO)基线水平对IST后3个月、6个月疗效的影响进行分析并绘制Ret、ANC、sTfR及矫正TPO水平预测IST疗效的ROC曲线.结果 IST后6个月获得血液学反应患者中位Ret、ANC、sTfR基线水平分别为19.9 (2.7~84.4)×10^9/L、0.59 (0.12~2.67)×10^9/L及0.82 (0.22~1.58) mg/L,均高于未获得血液学反应者[5.1(1.5~23.1)×10^9/L、0.20 (0.04~1.33)×10^9/L及0.45 (0.19~0.72) mg/L];矫正血清TPO水平为142.9(31.8~1 035.0),低于未获得血液学反应者[2 335.0(1 308.3~7 771.2)],差异均有统计学意义(P值均<0.05).根据ROC曲线获得Ret、ANC、sTfR及矫正TPO预测IST后6个月血液学反应的界限值分别为6.75×10^9/L、0.30× 10^9/L、0.76 mg/L及148.6.采用相应界限值对患者进行分组,7例高Ret、ANC、sTfR及低矫正TPO水平患者IST后6个月均获得血液学反应,9例低Ret、ANC、sTfR及高矫正TPO水平患者中仅1例获得血液学反应.结论 评估骨髓残存造血的参数Ret、ANC、sTfR及矫正TPO水平可用于预测AA患者IST近期疗效.
Objective To evaluate the prognostic value of residual bone marrow hematopoiesis in severe aplastic anemia (SAA) patients with immunosuppressive therapy (IST).Methods Clinical data and hematologic responses of 38 SAA patients treated with IST regimen (antithymocyte globulin combined with cyclosporine) in our hospital were retrospectively analyzed.Correlation of pre-IST baseline reticulocyte (Ret),absolute neutrophils count (ANC),soluble transferrin receptor (sTfR) concentration,corrected TPO value and hematologic response rate were statistically analyzed and receiver operating characteristic (ROC) curve was used to estimate the value of Ret,ANC,sTfR,and corrected TPO in predicting early IST response.Results Responders to IST had significantly higher pre-IST baseline Ret,ANC,sTfR concentration [19.9 (2.7-84.4) × 10^9/L,0.59 (0.12-2.67) × 10^9/L,0.82 (0.22-1.58) mg/L] and lower corrected TPO value [142.9(31.8-1 035.0)] than non-responders [5.1 (1.5-23.1) × 10^9/L,0.20(0.04-1.33) × 10^9/L,0.45 (0.19-0.72) mg/L and 2 335.0 (1 308.3-7 771.2)] (P〈0.05).Optimizing parameter cutoff levels obtained from ROC curve was Ret 6.75 × 10^9/L,ANC 0.30 × 10^9/L,sTfR 0.76 mg/L and corrected TPO 148.6,respectively.Combining the four parameters to predict 6 month hemotologic response showed that all the 7 patients with high Ret,ANC,sTfR and low corrected TPO,while only 1 among those 9 with low Ret,ANC,sTfR and high corrected TPO.Conclusion Such parameters evaluating residual bone marrow hematopoiesis as Ret,ANC,sTfR,corrected TPO are practical in predicting early IST response in SAA.