胃癌一线免疫治疗III期研究中国亚组结果公布!

2021-04-10 medsci medsci

在中国人群中,与单独化疗相比,欧狄沃(纳武利尤单抗)联合化疗一线治疗不可切除的晚期或转移性胃癌、胃食管连接部癌,取得了具有临床意义的总生存期(OS)及无进展生存期(PFS)获益。

2021410日,百时美施贵宝今日公布了关键III期研究CheckMate -649中国亚组的主要结果。在中国人群中,与单独化疗相比,欧狄沃(纳武利尤单抗)联合化疗一线治疗不可切除的晚期或转移性胃癌、胃食管连接部癌,取得了具有临床意义的总生存期(OS)及无进展生存期(PFS)获益。无论PD-L1表达阳性且联合阳性评分(CPS≥5CPS≥1的患者,还是所有随机人群,均观察到OSPFS获益。以上亚组分析结果与CheckMate -649研究中的晚期胃癌、胃食管连接部癌及食管腺癌全球整体人群的结果一致

中国胃癌的发病率和致死率分别占全球的44%49%,,且80%的患者确诊时已是进展期。胃癌一线治疗是决定患者生存获益和后续治疗的关键因素,但以往一线标准化疗能为患者带来的生存获益非常有限,临床亟需创新的治疗选择。”CheckMate -649研究中国主要研究者、北京大学肿瘤医院副院长沈琳教授表示,中国患者迫切的临床需求是全球晚期胃癌治疗发展的最大推动力之一。CheckMate -649研究的中国亚组数据坚定了我们对推动胃癌及胃食管连接部癌免疫治疗不断发展的信心,并有望全面革新中国晚期胃癌及胃食管连接部癌的一线治疗的格局。

在涵盖中国大陆患者的胃癌及胃食管连接部癌免疫治疗临床研究中,CheckMate -649研究是首个且目前唯一取得阳性结果的一线治疗III期研究,共纳入208名先前未经治疗且不可手术的HER2阴性中国大陆晚期或转移性胃癌或胃食管连接部癌患者,随机分配至纳武利尤单抗联合化疗组或单独化疗组。无论PD-L1表达情况,均可入组。

研究结果显示,在PD-L1阳性且CPS≥5的患者中,主要研究终点方面,欧狄沃联合化疗组的中位OS15.5个月(95% CI: 11.9-25.5),对照的单独化疗组为9.6个月(95% CI: 8.0-12.1)(风险比[HR]: 0.54; 95%可信区间[CI]: 0.36-0.79)。欧狄沃联合化疗组的中位PFS8.5 个月(95% CI: 5.9-12.4),单独化疗组4.3个月(95% CI: 4.1-6.5)(HR: 0.52; 95% CI: 0.34-0.77)。此外,次要研究终点方面,欧狄沃联合化疗组的客观缓解率(ORR)为68%95% CI: 56-79),单独化疗组为 48%95% CI: 36-60)。

PD-L1阳性且CPS≥1患者和所有随机人群中,欧狄沃联合化疗也均显示出具有临床意义的OS获益。在PD-L1阳性且CPS≥1患者中,欧狄沃联合化疗组的中位OSHR: 0.62; 95% CI: 0.43-0.87)为14.3 个月(95% CI: 11.5–17.5),单独化疗组为9.9 个月(95% CI: 8.1–12.1)。在所有随机人群中,欧狄沃联合化疗组的中位OSHR: 0.61; 95% CI: 0.44-0.85)为14.3个月(95% CI: 11.5–17.5),单独化疗组为10.3 个月(95% CI: 8.1–12.1)。

在此项研究中,欧狄沃联合化疗的安全性特征与已知欧狄沃及化疗的安全性特征一致,未观察到新的安全性信号。且中国亚组患者的安全性总体与全球人群一致。

CheckMate -649中国研究者、中山大学肿瘤防治中心院长徐瑞华教授指出:胃癌是中国最重要的公共卫生议题之一。累积中国数据、反映中国声音、探索适合中国患者的创新治疗手段是开展临床研究的重要环节。CheckMate -649研究的中国亚组数据首次明确了免疫检查点抑制剂联合化疗能够为中国胃癌及胃食管连接部癌患者的一线治疗带来显著的生存获益,且这一结论建立在可观的中国人群规模之上,为中国胃癌的临床治疗和学术研究提供了丰富的循证医学证据,有望成为未来中国诊疗指南制定的重要参考,推进中国胃癌整体诊疗水平的发展。

在充分考虑中国胃癌高发的前提下,CheckMate -649研究纳入了大规模具备胃癌一线疾病代表性的中国患者,并采用了高度契合目前中国胃癌临床实践的策略,对中国胃癌临床研究与治疗具有里程碑意义。百时美施贵宝全球研发副总裁、中国研发负责人蔡学钧博士表示,HER2阴性的胃癌及胃食管连接部癌一线治疗中,欧狄沃联合化疗是十余年来首个且目前唯一经III期临床试验证实能够超越化疗为患者带来显著生存获益的治疗方案。我们希望能够尽快将这一具有突破性临床价值的治疗选择带给更多的中国患者,解决他们迫切且未被满足的治疗需求。

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    2022-03-06 juliusluan78
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    2021-04-15 科研科研科研

    胃癌

    0

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    2021-04-11 JZ Yang

    期待her2阳性胃癌的后线免疫治疗

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