在慢性淋巴细胞白血病(CLL)治疗越来越有效的时代,建立临床分期系统不能准确区分预后组。目前有很多新的预后标志,但是没有系统将主要的临床,生物和基因变量整合至广泛接受的评分中。因此,研究者进行了一项综合分析,分析用于发展CLL患者国际预后指标的26种预后因素。(摘要ID:7002)【方法】
我们的全分析集收集了来自法国,德国,英国,美国和波兰的8项3期试验(3472名早期或晚期疾病患者;中位年龄61岁[范围27-86];中位观察时间[OT]80个月)。FAS随机分为训练集和内部验证集(TD, 2308[67%]; IVD, 1164 [33%])。研究使用多变量统计方法,主要终点是总生存期(OS)。通过完整病历分析来处理缺失数据。这一模型通过第三个数据集(包含梅约诊所的845名新诊断CLL患者,中位年龄62岁[范围25-89];中位OT为63个月)进行验证。
【结果】
基于1192(52%)名TD的患者,研究者鉴定了5个OS的***预测因素:年龄,临床分期,17p缺失和/或TP53突变,IGHV突变状态和β2-微球蛋白(B2M)水平。使用重量分级,一种预后指标可以衍生出4个不同患者组:低危(评分0-1),中危(评分2-3),高危(评分4-6)和极高危(评分7-10),他们的OS显著不同(5年的OS分别为93%,79%,64%和23%,p < 0.001;曲线下面积c=0.72[95% CI, 0.69-0.76])。梅约诊所数据集中4个风险组的5年OS分别为97%,91%,68%和21%(p < 0.001, c = 0.79 [0.74-0.85])。
【结论】
CLL-IPI联合最重要的基因风险因素——临床分期,年龄和B2M可列入适用CLL患者的预后评分。此外,它可以区分不同预后组,有利于目前的治疗建议。
编译自:The international Prognostic Index for patients with CLL (CLL-IPI): An international meta-**ysis. ASCO. 2015.5
英文摘要:
Background: Inthe era of more effective treatments for CLL, the established clinical staging systems [Rai/Binet] do not accurately discriminate between prognostic groups.There are several new prognostic markers, but no system integrates the major clinical, biological and genetic variables into one widely accepted score.Therefore we performed a comprehensive **ysis of 26 prognostic factors todevelop an internationally applicable prognostic index for CLL patients (pts)[CLL-IPI].
Methods: Our full **ysis set (FAS) was collected from 8 phase 3 trials from France,Germany, UK, USA and Poland [3472 pts at early & advanced stage; median age61 years (yr) (range 27 - 86); median observation time (OT) 80 months (ms)].The FAS was randomly divided into training and internal validation datasets[TD, 2308 (67%); IVD, 1164 (33%)]. Methods of multivariable statistics wereapplied and the main end point was overall survival (OS)。 Handling of missingdata was performed by complete case **ysis. The model was externally validated in a third dataset comprised of 845 newly diagnosed CLL pts from Mayo Clinic [median age 62 yr (range 25 - 89); median OT 63 ms].
Results: Basedon 1192 (52%) pts from the TD, 5 independent predictors for OS were identified:age, clinical stage, del(17p) and/or TP53 mutation, IGHV mutation status and β2-microglobulin (B2M) level. Using weighted grading, a prognostic index wasderived separating 4 different pt groups: low (score 0-1), intermediate (score2-3), high (score 4-6) and very high risk (score 7-10) with significantly differentOS [93%, 79%, 64% and 23% OS at 5 yr for the low to very high risk groupre spectively, p < 0.001; C-statistic c = 0.72 (95% CI, 0.69-0.76)]. This multivariable model was confirmed on the IVD [575 (49%) pts; c = 0.777(0.73-0.82)] and the 4 risk groups were reproduced with 97%, 91%, 68% and 21%5-yr OS [(p < 0.001), c = 0.79 (0.74-0.85)] on the Mayo set.
Conclusions:The resulting CLL-IPI combines the most important genetic risk factors (IGHV, del(17p)/TP53 mutation) with clinical stage, age,and B2M into an easily applicable prognostic score for CLL pts. Moreover, itboth discriminates between prognostic groups and is ***rmative regarding current treatment recommendations.
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