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2016年6月3-7日,一年一度的美国临床肿瘤学会(American Society of Clinical Oncology,ASCO)年会将在芝加哥举办。6月3,下午3:00到6:00的血液肿瘤——
一系列研究表明,ASCT后给予LEN MNTC降低了MM患者的疾病进展或死亡风险。然而,这些研究并未对该类患者的OS进行评估。
【方法】
检索了17项ASCT治疗后应用LEN维持治疗的随机对照试验(RCTs),评估了LEN vs 安慰剂或无维持治疗(对照组;CTL)的OS。3项RCTs(IFM 2005-02,CALGB 100104 [Alliance],GIMEMA RV-209)满足了预先设定的纳入标准(具有患者水平的数据和CTL组,并获得了新诊断MM患者ASCT后接受LEN维持治疗的初始疗效分析数据库锁)。该3项RCTsd 2015年3月数据截断.
【结果】
在这3项RCTs中,1209名患者被随机分配至:第1-21天(GIMEMA)或1-28天(IFM和CALGB)LEN 10 mg/d治疗组(n = 605);或CTL组 (n = 604)。中位随访6.6年,491名患者(41%)死亡。数据汇总时对基线特征进行了平衡。在诱导治疗及单次(82%)或串联(18%)ASCT后,55%的患者达到了完全缓解(CR)或很好的部分缓解(VGPR)。LEN组和对照组的中位OS分别为未达 vs 86个月(HR = 0.74;95% CI,0.62-0.89;P = 0.001),并且LEN组的5年、6年和7年OS优于对照组(分别为71% vs 66%,65% vs 58%和62% vs 50%)。Fisher’s组合试验证实了该分析中OS的显著获益(P = 0.001)。ASCT后未达PR的患者与达到CR/VGPR的患者的LEN获益一致(HR = 0.70;95% CI,0.54-0.90)。亚组的OS获益一致。异质性检验显示试验之间存在明显差异(P = 0.047)。研究将进一步探讨并呈现基线或疾病特征以及2线治疗的潜在影响以及第二原发恶性肿瘤的数据。
【结论】
该大型meta分析证实了,ASCT后进行来那度胺维持治疗明显延长了MM患者的OS,并且证实了达所有类别响应的患者均可获益。
摘要原文:
Lenalidomide (LEN) maintenance (MNTC) after high-dose melphalan and autologous stem cell transplant (ASCT) in multiple myeloma (MM): A meta-analysis (MA) of overall survival (OS). Abstract No:8001
Background: Several studies demonstrate that LEN MNTC post ASCT reduces the risk of disease progression or death in patients (pts) with MM by ≈ 50% (Attal NEJM 2012; McCarthy NEJM 2012; Palumbo NEJM 2014). However, these studies were not powered for OS. To assess the effect of LEN MNTC post ASCT on OS, an MA was conducted.
Methods: A prospectively planned MA assessed the OS of LEN vs placebo/no MNTC (control; CTL) after ASCT. A search identified 17 randomized controlled trials (RCTs) using LEN post ASCT. 3 RCTs (IFM 2005-02, CALGB 100104 [Alliance], GIMEMA RV-209) met prespecified inclusion criteria (had pt-level data, a CTL arm, and achieved database lock for primary efficacy analysis of NDMM pts receiving LEN post ASCT). A March 2015 cutoff of the 3 RCTs enabled sufficient OS events to test treatment effect (HR = 0.78).
Results: In the 3 RCTs, 1209 pts were randomized from 2005 to 2009 to receive LEN (n = 605) 10 mg/day on days 1-21/28 (GIMEMA) or 1-28/28 (IFM and CALGB) or CTL (n = 604). With a median follow-up of 6.6 yrs, 491 pts (41%) had died. Baseline characteristics were generally balanced in the pooled data.
After induction and single (82%) or tandem (18%) ASCT, 55% of pts achieved a complete response (CR) or very good partial response (VGPR). Median OS for LEN vs CTL was not reached vs 86 mos (HR = 0.74; 95% CI, 0.62-0.89; log-rank P = .001), and 5-, 6-, and 7-yr OS were longer in LEN vs CTL group (71% vs 66%, 65% vs 58%, and 62% vs 50%, respectively). Fisher’s combination test confirmed the significant OS benefit of the MA (P = .001). Pts who achieved ≤ PR post ASCT benefited from LEN (HR = 0.86; 95% CI, 0.65-1.15) as well as pts with CR/VGPR (HR = 0.70; 95% CI, 0.54-0.90). OS benefit was generally consistent across subgroups. Heterogeneity test showed significant difference across trials (P = .047). The potential impact of baseline/disease characteristics, as well as 2nd-line therapy (IFM and CALGB), on OS will be explored and presented. Second primary malignancy data will be presented.
Conclusions: This large MA demonstrates that LEN MNTC significantly prolonged OS vs CTL post ASCT, including in pts who achieved CR, demonstrating benefit in pts in all response categories. Clinical trial information:NCT00430365; NCT00114101; NCT00551928
会议专题》》》2016年ASCO年会专题报道