2015年ASCO年会将于5月29日--6月2日在美国芝加哥召开,5月31日上午的消化系统(非结直肠)肿瘤口头报告专场,将公布前瞻性随机III期研究——CONKO-005试验的结果。吉西他滨(Gem)辅助化疗6个月会显著改善胰腺癌患者生存期。CONKO-005研究旨在评估EGFR-酪氨酸激酶-抑制剂厄洛替尼(Erlo 100mg 每日p.o.)联合Gem(1000mg/m2 i.v. 第1,8,15,q29)治疗R0切除后患者24周的附加效应。
研究方法:
在一项开放标签多中心设计中,患者在手术后8周内,随机分配接受GemElro或者Gem;通过淋巴结受累,手术技术,研究中心进行分层。主要终点是无疾病生存期(DFS)。该研究计划在0.05显著水平应用80%P值以检测DFS从14到18个月的改善情况。次要目标是中位总生存期(OS)和治疗安全性。研究分析应用Kaplan-Meier法展开;治疗组生存数据的比较应用log-rank检测。
研究结果:
在2008年4月——2013年7月之间,219例患者随机接受GemErlo治疗,217例患者接受Gem治疗。患者特征保持平衡(GemErlo/Gem):年龄(中位数63/65岁),肿瘤状态(T3/T4 88/86%),淋巴结状态(N pos 64/66%),分级(G3 33/34%)。
中位随访41个月后(2015年3月),350例(80%)事件发生。在这两组中中位治疗时间是22周。3/4级毒性是(GemErlo/Gem):皮疹7/0.4,腹泻5/1,恶心2/2,疲劳5/2,高血压3/1,GGT9/9,中性粒细胞减少27/28,血小板减少5/2.
两组的DFS(中位:GemErlo 11.6个月,Gem 11.6个月;HR 0.89,95% CI 0.72——1.10)或0S(中位:GemErlo 24.6个月,Gem 26.5个月;HR 0.90,95% CI 0.71——1.15)没有差异。
在GemErlo组中皮疹级别和改善的DFS之间没有联系(中位:皮疹级别0-1 vs ≥2 12.2 vs 11.0个月;HR 0.91,95% CI 0.66-1.25)。OS曲线显示一个后期散度支持GemErlo(2/3/4/5-年后评估的存活率:54/36/31/28% vs 53/33/22/19%)。
结论:
GemErlo联合治疗24周未能改善DFS或OS.在经GemErlo治疗的患者中有长期生存的趋势。临床试验信息:DRKS00000247.
阅读英文摘要
CONKO-005: Adjuvant therapy in R0 resected pancreatic cancer patients with gemcitabine plus erlotinib versus gemcitabine for 24 weeks—A prospective randomized phase III study.(Abstract NO:4007)Authors:Marianne Sinn, Torsten Liersch,et al.
Session Type:Oral Abstract Session
Background:Adjuvant chemotherapy with gemcitabine (Gem) for 6 months significantly improves survival of pancreatic cancer patients. CONKO-005 was designed to evaluate an additional effect of the EGFR-tyrosinkinase-inhibitor erlotinib (Erlo 100 mg p.o. daily) in combination with Gem (1000 mg/m2 i.v. day 1,8,15, q29) for 24 weeks in pts after R0 resection.
Methods:In an open-label multicenter design, pts were randomised within 8 weeks after operation to receive GemErlo or Gem; stratified by lymph node involvement, operation techniques, study centre. The primary endpoint was disease-free survival (DFS)。 The study was planned with a power of 80% at a significance level of 0.05 to detect an improvement of DFS from 14 to 18 months. Secondary objectives were median overall survival (OS) and treatment safety. Kaplan-Meier **yses were performed; survival data for the treatment arms compared using log-rank test.
RESULTS:Between April 2008 and July 2013, 219 pts were randomized to GemErlo and 217 to Gem. Pts characteristics are well balanced (GemErlo/Gem): age (median 63/65 years), tumor status (T3/T4 88/86%), nodal status (N pos 64/66%), grading (G3 33/34%)。 After a median follow up of 41 months (March 2015), 350 events (80%) occurred. Median treatment duration was 22 weeks in both groups. Grade 3/4 toxicities were (GemErlo%/Gem%): rash 7/0.4, diarrhea 5/1, nausea 2/2, fatigue 5/2, hypertension 3/1,GGT 9/9, neutropenia 27/28, thrombopenia 5/2. There was no difference in DFS (median: GemErlo 11.6 months, Gem 11.6 months; HR 0.89, 95%CI 0.72-1.10) or OS (median: GemErlo 24.6 months, Gem 26.5 months; HR 0.90, 95%CI 0.71-1.15)。 There was no correlation between the grade of rash and an improved DFS in the GemErlo group (median: rash grade 0-1 vs > = grade 2 12.2 vs 11.0 months; HR 0.91, 95%CI 0.66-1.25)。 OS curves show a late divergence in favour of GemErlo (estimated survival after 2/3/4/5-years: 54/36/31/28% vs 53/33/22/19%)。
Conclusion:The combination therapy of GemErlo for 24 weeks did not improve DFS or OS. There is a trend in favour of long-term survival in pts treated with GemErlo. Clinical trial ***rmation: DRKS00000247.
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