重磅!第一个PD-L1抑制剂获得转移期NSCLC适应症

2016-10-20 王鑫 肿瘤资讯

今天,罗氏(Roche)集团旗下基因泰克(Genentech)公司宣布,美国FDA批准其免疫疗法药物atezolizumab用于治疗转移性非小细胞肺癌(NSCLC)。atezolizumab治疗转移期肺癌的III期临床实验结果于10月9日在ESMO大会上公布,让我们来看看这项研究的具体内容吧!2016年10月9日来自法国的马赛大学的Fabrice Barlesi教授在ESMO大会上口头报告PD-L

今天,罗氏(Roche)集团旗下基因泰克(Genentech)公司宣布,美国FDA批准其免疫疗法药物atezolizumab用于治疗转移性非小细胞肺癌(NSCLC)。atezolizumab治疗转移期肺癌的III期临床实验结果于10月9日在ESMO大会上公布,让我们来看看这项研究的具体内容吧!

2016年10月9日来自法国的马赛大学的Fabrice Barlesi教授在ESMO大会上口头报告PD-L1抑制剂atezolizumab(atezo)对比多西他赛二、三线治疗NSCLC的随机Ⅲ期的OAK研究。证实atezo可显著延长OS,且生存获益与PD-L1表达水平和组织学类型无关,另外atezo毒性更低。

背景:

Atezo是一种人源化抗PD-L1单克隆抗体 与受体PD-1和B7.1结合,恢复肿瘤特异性T细胞功能。Ⅱ期POPLAR研究证明Atezo较多西他赛((doc)可能延长生存。该Ⅲ期、随机OAK研究比较Atezo和doc治疗既往治疗过NSCLC的疗效。

方法:

纳入既往治疗过的NSCLC患者。分层因素为:PD-L1表达状态、既往化疗方案(1线对比2线)、组织学类型。1:1随机分入atezo组 (1200 mg IV q3w) 或者 doc租 (75 mg/m2  IV  q3w)。共同首要研究终点:ITT人群的OS,PD-L1表达肿瘤细胞(TC) 1/2/3亚组或肿瘤浸润免疫细胞(IC) 1/2/3亚组的OS。次要研究终点为PFS, ORR, DoR和安全性。

结果:

本次公布1225例患者中前期入组850例的数据。中位年龄64岁,61%男性,25%接受二线化疗,26%鳞癌,67%既往吸烟,37%PS评分为0。与doc组比较,Atezo组OS由9.6个月显著延长至13.8个月,死亡风险下降27%(HR 0.73; P = .0003)。在PD-L1表达TC1/2/3 或IC1/2/3亚组死亡风险下降26%(HR 0.74; P = .0102)。任何PD-L1表达水平OS均有获益,包括PD-L1表达TC0和IC0患者。PL-1高表达(TC3或 IC3)获益更加明显。鳞癌或非鳞癌均有生存获益。ITT人群,PFS的HR为0.95(2.8 个月对比 4.0个月),ORR13.6%对比13.4% ,DoR 16.3个月对比 6.2个月。atezo组3~4级治疗为15%,doc组为43%。atezo组无1例治疗相关死亡,而doc组1例。未发现新的AE。

结论:

这是第一个PD-L1抑制剂治疗NSCLC的Ⅲ期研究,证实较多西他赛,atezo二、三线治疗NSCLC显著延长OS,获益与组织学类型和PD-L1表达水平无关。Atezo较多西他赛安全性更高和耐受性更好。

专家点评:

主要研究者Barlesi教授指出,atezolizumab在不同瘤种中发挥作用。第一次报道OAK研究结果,初步分析1225例患者中850例生存和安全性数据,发现atezo显著降低死亡风险27%(p=0.0003),且与PD-L1表达水平无关,在PD-L1表达<1%患者仍然看到生存获益,但在PD-L1高表达患者死亡风险下降更明显为59%。这是第一个PD-L1药物的大型Ⅲ期研究,研究结果与Ⅱ期的POPLAR数据一致。Atezo为NSCLC提供新的二线治疗选择。

德国Gross hansdorf胸部肿瘤科Martin Reck教授评论说:PD-L1/PD-1抗体在NSCLC治疗中发挥越来越重要作用。OAK研究与POPLAR 和 CHECKMATE研究均显示出免疫治疗在延长生存方面的优势。值得注意是,该研究结果为OS的延长,甚至在PD-L1不表达患者中,说明PD-L1阴性不是免疫治疗排除的标准。PD-L1不是理想的疗效预测替代指标,只能作为有利因素,还需要新的标志物指导那类患者能从免疫治疗中真正获益。

Atezo是可与PD-L1蛋白相结合的单克隆抗体,当它结合肿瘤细胞和肿瘤浸润免疫细胞中表达的PD-L1时,可同时阻断该表面分子与PD-1受体以及B7.1受体之间的相互作用。通过抑制PD-L1的功能,Atezo可以活化T细胞的免疫应答来攻击癌细胞。目前,Atezo是FDA批准的第一个,也是唯一一个抗PD-L1的肿瘤免疫疗法。

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    2016-10-22 smartjoy
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  5. [GetPortalCommentsPageByObjectIdResponse(id=1656455, encodeId=57fa165645526, content=<a href='/topic/show?id=14001392e65' target=_blank style='color:#2F92EE;'>#PD-L1抑制剂#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13927, encryptionId=14001392e65, topicName=PD-L1抑制剂)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d5eb24855327, createdName=LSJ119, createdTime=Sat Sep 02 04:19:00 CST 2017, time=2017-09-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1851359, encodeId=49b8185135903, content=<a href='/topic/show?id=f0a254918f0' target=_blank style='color:#2F92EE;'>#抑制剂#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54918, encryptionId=f0a254918f0, topicName=抑制剂)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Fri Sep 15 05:19:00 CST 2017, time=2017-09-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1254898, encodeId=26f21254898f0, content=<a href='/topic/show?id=be71139214f' target=_blank style='color:#2F92EE;'>#PD-L1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13921, encryptionId=be71139214f, topicName=PD-L1)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e76f39, createdName=smartjoy, createdTime=Sat Oct 22 01:19:00 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1336733, encodeId=73391336e339a, content=<a href='/topic/show?id=554d94e13ae' target=_blank style='color:#2F92EE;'>#适应症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94713, encryptionId=554d94e13ae, topicName=适应症)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=3dd32500118, createdName=644982816_68283321, createdTime=Sat Oct 22 01:19:00 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1548916, encodeId=2a2c15489162e, content=<a href='/topic/show?id=f7879600061' target=_blank style='color:#2F92EE;'>#重磅#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96000, encryptionId=f7879600061, topicName=重磅)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3acc14121561, createdName=xxxx1054, createdTime=Sat Oct 22 01:19:00 CST 2016, time=2016-10-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=149960, encodeId=c8ed14996070, content=厉害,希望尽快进入临床,拯救更多人, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a7081934059, createdName=fenqiuse, createdTime=Thu Oct 20 16:07:22 CST 2016, time=2016-10-20, status=1, ipAttribution=)]
    2016-10-22 xxxx1054
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    2016-10-20 fenqiuse

    厉害,希望尽快进入临床,拯救更多人

    0