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纳武利尤单抗食管癌首秀:无论PD-L1表达,患者总生存期获益均显著优于化疗

2019-10-04 佚名 医谷

2019年9月30日,百时美施贵宝(NYSE:BMY)和小野制药有限公司公布了一项名为ATTRACTION-3的III期临床研究结果。与化疗相比,纳武利尤单抗在主要终点总生存期(OS)上表现出具有统计学意义的显著获益优势,死亡风险降低23% [HR 0.77;95% CI:0.62-0.96;p=0.019] ,中位生存期(mOS)延长2.5个月[纳武利尤单抗和化疗组的mOS分别为10.9个月(9

2019年9月30日,百时美施贵宝(NYSE:BMY)和小野制药有限公司公布了一项名为ATTRACTION-3的III期临床研究结果。与化疗相比,纳武利尤单抗在主要终点总生存期(OS)上表现出具有统计学意义的显着获益优势,死亡风险降低23% [HR 0.77;95% CI:0.62-0.96;p=0.019] ,中位生存期(mOS)延长2.5个月[纳武利尤单抗和化疗组的mOS分别为10.9个月(95% CI:9.2-13.3)与8.4个月(95% CI:7.2-9.9)] 。该试验中纳武利尤单抗的安全性与既往食管鳞状细胞癌及其他实体瘤临床试验报道一致。该研究结果于2019年欧洲肿瘤内科学会(ESMO)年会的主席研讨会中公布,并同时在《柳叶刀肿瘤学》上发表

食管癌是全球第七大常见癌症,也是第六大癌症死亡原因。转移性食管癌患者的5年相对生存率一般低于8%。食管癌最常见的两种类型为鳞状细胞癌和腺癌,分别占所有食管癌的90%和10%。每年,约有57.2万例新确诊病例,约50万人死于食管癌。大多数患者诊断时候已是晚期,影响患者的日常生活,包括饮食。食管癌在亚洲的发病率最高,每年确诊病例超44.4万例,约占全球食管癌病例的80%。

ATTRACTION-3 是一项多中心、随机、开放标签的全球III期临床研究。该研究旨在评估纳武利尤单抗对比化疗(多西他赛或紫杉醇)治疗既往接受过氟嘧啶和含铂药物联合疗法难治或不可耐受的不可切除性晚期或复发性食管鳞状细胞癌(ESCC)患者的疗效与安全性。两组纳入的患者均主要来自亚洲,占96%,患者接受治疗直至疾病进展或观察到严重不良事件发生。主要研究终点是总生存期(OS)。次要研究终点包括研究者评估的客观缓解率(ORR)、无进展生存期(PFS)、疾病控制率、缓解持续时间(DoR)和安全性。

数据显示,接受纳武利尤单抗治疗的患者12个月和18个月总生存率分别达47%(95% CI:40-54)和31%(95% CI:24-37),对比化疗组分别为34%(95% CI:28-41)和21%(95% CI:15-27)。且无论肿瘤PD-L1表达水平如何,纳武利尤单抗组均可观察到生存获益。此外,一项关于患者报告结局(PRO)的探索性分析显示,与化疗相比,纳武利尤单抗可显着改善患者的生活质量。

韩国延世大学医学院、延世肿瘤中心教授Byoung Chul Cho博士表示,“在这项临床研究中观察到的显着生存获益、良好安全性和患者报告结果均表明,纳武利尤单抗有望成为晚期食管鳞状细胞癌患者重要的二线治疗新选择,为患者延长生存期、改善生活质量带来了可能。”

此外,纳武利尤单抗组和化疗组的客观缓解率(ORR)相当,分别为19%(95%CI: 14-26)和22%(95% CI:15-29)。然而,该研究显示,纳武利尤单抗大幅延长了患者的中位缓解持续时间(mDoR)达6.9个月(95% CI:5.4-11.1),而化疗组mDoR为3.9个月(95% CI:2.8-4.2)。在数据统计截止时,纳武利尤单抗组有7名患者仍有持续缓解,而化疗组有2名。纳武利尤单抗组和化疗组的无进展生存期(PFS)无显着差异,总风险比(HR)为1.08(95% CI:0.87-1.34)。

“这些结果对预后通常不佳的晚期食管鳞状细胞癌患者而言是振奋人心的。尤为重要的是,无论肿瘤PD-L1表达水平如何,纳武利尤单抗都能改善患者的生存期。”百时美施贵宝消化道肿瘤研发负责人Ian M. Waxman博士表示,“在食管癌研究中取得如此重大的进展令我们备受鼓舞,期待能拓展我们在消化道肿瘤的研究。”

不良反应方面,与化疗相比,纳武利尤单抗的治疗相关不良事件(TRAEs)较少,接受纳武利尤单抗患者的总TRAEs发生率为66%,而化疗组患者达95%。纳武利尤单抗组的3-4级TRAEs发生率较化疗组更低(18% vs 63%),两组因TRAEs导致停药的患者比例相同(9%)。

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    2019-10-06 smartjoy
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    2019-10-06 zhouqu_8
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