喜讯!默沙东PD-1免疫疗法Keytruda获日本批准一线治疗PD-L1阳性非小细胞肺癌(NSCLC)

2016-12-23 佚名 生物谷

  上周,美国制药巨头默沙东(Merck & Co)PD-1免疫疗法Keytruda在欧盟监管方面获得了欧洲药品管理局(EMA)人用医药产品委员会(CHMP)的积极意见,CHMP支持批准Keytruda一线治疗PD-L1阳性晚期非小细胞肺癌(NSCLC)患者,具体为肿瘤高水平表达PD-L1(肿瘤比例得分≥50%)、无表皮生长因子受体(EGFR)及间变性淋巴

 

上周,美国制药巨头默沙东(Merck & Co)PD-1免疫疗法Keytruda在欧盟监管方面获得了欧洲药品管理局(EMA)人用医药产品委员会(CHMP)的积极意见,CHMP支持批准Keytruda一线治疗PD-L1阳性晚期非小细胞肺癌(NSCLC)患者,具体为肿瘤高水平表达PD-L1(肿瘤比例得分≥50%)、无表皮生长因子受体(EGFR)及间变性淋巴瘤激酶(ALK)阳性肿瘤突变的晚期非小细胞肺癌(NSCLC)成人患者。

就在最近,Keytruda治疗非小细胞肺癌(NSCLC)在亚洲监管方面也传来了喜讯。日本劳动卫生福利部(MHLW)已批准Keytruda(200mg,每3周一次):(1)作为一种一线治疗药物,用于肿瘤PD-L1呈高水平表达(肿瘤比例得分≥50%)、无表皮生长因子受体(EGFR)及间变性淋巴瘤激酶(ALK)阳性肿瘤突变的晚期非小细胞肺癌(NSCLC)患者。(2)作为一种二线治疗药物,用于肿瘤PD-L1呈任意表达水平(肿瘤比例得分≥1%)的晚期非小细胞肺癌(NSCLC)患者。

此次批准,使Keytruda成为日本市场获批一线治疗肿瘤PD-L1呈高水平表达的晚期非小细胞肺癌(NSCLC)的首个PD-1免疫疗法,标志着该类型非小细胞肺癌在临床治疗上的一个重大里程碑。

MHLW批准Keytruda一二线治疗,是基于2项临床研究(KEYNOTE-024,KEYNOTE-010)的数据:

(1)KEYNOTE-024研究是一项开放标签、随机、关键性III期临床研究,在鳞状和非鳞状转移性非小细胞肺癌(NSCLC)患者中开展,这些患者之前未接受系统化疗控制其晚期病情,并且肿瘤高水平表达PD-L1(肿瘤比例得分≥50%),同时不存在表皮生长因子受体(EGFR)及间变性淋巴瘤激酶(ALK)阳性肿瘤突变。该研究评估了Keytruda单药疗法(每3周一次,200mg)相对于含铂标准化疗方案的疗效和安全性。数据显示,与含铂标准化疗相比,Keytruda(每3周200mg)作为单药疗法用于一线治疗在主要终点(无进展生存期,PFS)和次要终点(总生存期,OS)均表现出优越性。基于这些数据,该项研究已提前终止,使化疗组患者机会转向Keytruda治疗。

(2)KEYNOTE-010是一项开放标签、随机、关键性II/III期临床研究,在接受含铂化疗和相应的靶向疗法(若存在EGFR或ALK异常突变)治疗后病情进展的PD-L1阳性(肿瘤比例得分TPS≥1%)晚期非小细胞肺癌(NSCLC)患者中开展,评估了2种剂量Keytruda(2mg/kg和10mg/kg,每3周一次)相对于标准化疗多西他赛(75mg/kg,每3周一次)的疗效和安全性。该研究首次采用基于PD-L1表达状态的前瞻性测定方法,评估了Keytruda相对标准化疗的潜力。研究数据显示,在任意PD-L1表达水平(肿瘤比例得分TPS≥1%)的NSCLC患者中,与多西他赛化疗相比,Keytruda显著延长了总生存期(OS)。

这2项研究中,PD-L1表达水平采用安捷伦旗下Dako北美公司开发的免疫组织化学伴随诊断试剂盒PD-L1 IHC 22C3 PharmDX进行评估,这款伴随诊断试剂盒已于2016年11月25日获日本监管部门批准,用于帮助确定适合Keytruda治疗的患者,包括既往接受治疗且肿瘤PD-L1呈任意表达水平的晚期非小细胞肺癌(NSCLC)患者,以及既往未接受治疗且PD-L1呈高水平表达的晚期非小细胞肺癌(NSCLC)患者。需要指出的是,关于肿瘤PD-L1表达水平,若肿瘤比例得分(TPS)<1%,则被认为不表达PD-L1。

数十年来,化疗一直被作为一线治疗非小细胞肺癌(NSCLC)的中流砥柱疗法。Keytruda在肿瘤高水平表达PD-L1蛋白的非小细胞肺癌(NSCLC)群体中所取得的激动人心的数据,使其成为非小细胞肺癌群体中一种重要的一线治疗选择,将变革临床上非小细胞肺癌的一线治疗模式。

PD-1/PD-L1免疫疗法是当前备受瞩目的新一类抗癌免疫疗法,旨在利用人体自身的免疫系统抵御癌症,通过阻断PD-1/PD-L1信号通路使癌细胞死亡,具有治疗多种类型肿瘤的潜力,有望实质性改善患者总生存期(OS)。该领域的佼佼者——默沙东、百时美施贵宝、阿斯利康、罗氏均在火速推进各自的临床项目,调查单药疗法和组合疗法用于多种癌症的治疗,以彻底发掘该类药物的最大临床潜力。

原始出处:

KEYTRUDA® (pembrolizumab) Approved as First Anti-PD-1 Therapy in Japan for First-Line Treatment of Patients with Advanced Non-Small Cell Lung Cancer (NSCLC) Whose Tumors Express High Levels of PD-L1

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    2016-12-25 smartjoy
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    2016-12-25 yese
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