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百时美施贵宝公布CheckMate 227最终临床结果,数据喜人!

2019-09-29 MedSci MedSci

2019年9月28日,百时美施贵宝(纽约证券交易所代码:BMY)今日公布了III期临床研究CheckMate 227第一部分最终结果,这一研究评估了欧狄沃联合低剂量伊匹木单抗用于一线治疗晚期非小细胞肺癌(NSCLC)患者的疗效。欧狄沃联合低剂量伊匹木单抗达到了研究的独立共同主要终点,即PD-L1≥1%的患者中的总生存(OS)期。研究结果显示,与化疗相比,该联合治疗在PD-L1≥1%的患者中总生存获

2019年9月28日,百时美施贵宝(纽约证券交易所代码:BMY)今日公布了III期临床研究CheckMate 227第一部分最终结果,这一研究评估了欧狄沃联合低剂量伊匹木单抗用于一线治疗晚期非小细胞肺癌(NSCLC)患者的疗效。欧狄沃联合低剂量伊匹木单抗达到了研究的独立共同主要终点,即PD-L1≥1%的患者中的总生存(OS)期。研究结果显示,与化疗相比,该联合治疗在PD-L1≥1%的患者中总生存获益显著 [HR 0.79;  97.72%  (CI): 0.65 至 0.96)]。此外,探索性分析发现,对于PD-L1 <1%的患者,欧狄沃联合低剂量伊匹木单抗能改善患者的总生存 [HR 0.62; 95% CI: 0.48 至 0.78]。该联合治疗方案的2年生存率在PD-L1≥1%与PD-L1<1%的人群中均为40%,而在化疗组相对应的2年生存率分别为33%与23%。

这是首个,也是唯一显示与化疗相比,双免疫联合治疗用于非小细胞肺癌一线治疗能够为患者带来显著生存获益的临床研究。该研究结果将在西班牙巴塞罗那举行的2019年欧洲肿瘤内科学会(ESMO)大会的主席研讨会上发布 (简报编号:LBA4_PR,中欧夏令时间9月28日周六下午4:30-6:20)。

欧狄沃联合低剂量伊匹木单抗的安全性与既往报道的非小细胞肺癌(NSCLC)研究结果一致,未观察到新的安全性信号。

最少随访时间29.3个月时,无论PD-L1表达水平如何,接受欧狄沃联合低剂量伊匹木单抗治疗的患者持续缓解时间(DoR)是接受化疗患者的近4倍。PD-L1≥1%的患者接受欧狄沃联合低剂量伊匹木单抗治疗的客观缓解率(ORR)为35.9% (95% CI, 31.1 至 40.8)(完全缓解率为5.8%),而化疗组ORR为30.0% (95% CI, 25.5 至 34.7)(完全缓解率为1.8%)。其中联合治疗组的中位DoR为23.2个月,而化疗组仅为6.2个月。PD-L1<1%的患者接受欧狄沃联合低剂量伊匹木单抗治疗的ORR为27.3% (95% CI, 30.7 至 45.4)(完全缓解率2.1%),对比化疗组ORR 23.1% (95% CI, 17.3 至 29.8)(完全缓解率1.1%)。其中联合治疗组的中位持续缓解时间(mDoR)为18个月,而化疗组仅为4.8个月。

“这些阳性结果验证了双免疫检查点PD-1和CTLA-4阻滞在肺癌治疗中的免疫学原理,” CheckMate 227研究者,德国Grosshansdorf肺部研究中心医学及理学博士Martin Reck表示,“研究结果表明,双肿瘤免疫联合疗法用于治疗一线非小细胞肺癌可以带来深度且持久的缓解,以及明确的生存获益,为患者提供了一种‘无须化疗’的治疗方案。”

“CheckMate 227第1部分数据的公布,使得欧狄沃联合伊匹木单抗成为第一个,也是唯一的在一线非小细胞肺癌中显示总体生存优于化疗的双免疫联合治疗方案,” 百时美施贵宝肿瘤研发负责人、医学博士Fouad Namouni说,“这些研究结果在一线黑色素瘤和肾细胞癌的长期临床研究数据的基础上,证实了欧狄沃联合伊匹木单抗相较标准治疗所带来的获益。我们期待与监管部门分享这些数据,并通过持续的研究,拓展我们对该独特组合为肿瘤患者所带来价值的理解。”
(伊匹木单抗尚未在中国大陆上市)

关于CheckMate 227研究

CheckMate 227是一项多中心开放性III期临床研究,评估以欧狄沃®为基础的治疗方案对比含铂双药化疗用于晚期一线非小细胞肺癌(NSCLC)患者(包括鳞癌和非鳞癌组织学类型)。该研究共分为下列部分:

第1部分:

-1a部分:在PD-L1表达的患者中,评估与化疗相比,欧狄沃联合低剂量ipilimumab以及欧狄沃单药治疗的疗效
-1b部分:在不表达PD-L1的患者中,评估与化疗相比,欧狄沃联合低剂量ipilimumab以及欧狄沃联合化疗的疗效

第2部分:

不考虑PD-L1表达状态,评估欧狄沃联合化疗对比化疗的疗效

研究第一部分在评估欧狄沃联合伊匹木单抗(与化疗比较)时共有两个主要终点:一个是具有PD-L1表达的肿瘤患者的总生存期(OS, 在1a部分评估),另一个主要终点是高肿瘤突变负荷(TMB ≥ 10个突变/Mb,无论PD-L1表达状况如何)患者的无进展生存期(PFS,在1a和1b部分评估)。在第1部分中,在不考虑PD-L1表达状况的情况下,与化疗相比,将欧狄沃与伊匹木单抗联合用于高肿瘤突变负荷(TMB≥10个突变/Mb)患者,试验结果达到PFS共同主要终点。此外,相比化疗,欧狄沃与低剂量伊匹木单抗联合治疗用于PD-L1 ≥1%的一线非小细胞肺癌患者,可以带来更高的总生存期获益。在第2部分中,针对非鳞非小细胞肺癌患者,与化疗相比,欧狄沃与化疗联合治疗的研究结果未达到总生存期的主要终点。

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    2020-09-07 jktdtl
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