OAK是一个大型的全球多中心三期临床试验,主要评估使用PD-L1抗体Tecentriq的患者是不是比使用多西他赛活的更长(OS),同时还会评估PD-L1的表达情况对Tecentriq效果的影响。PD-L1检测所使用的抗体是SP142,同时检测肿瘤细胞和肿瘤组织中的免疫细胞的PD-L1表达。看来,Tecentriq成功了,多西他赛又被甩在了后面,之前BMS的PD-1抗体Opdivo和默沙东的PD-1抗体Keytruda就在肺癌中战胜了多西他赛。
值得注意的是:这个临床结果发现无论PD-L1表达状态如何,使用Tecentriq都会比使用多西他赛的患者OS更长。之前就有Tecentriq针对非小肺癌的二期临床POPLAR。
罗氏表示,Tecentriq将由旗下基因泰克(Genentech)推向市场,售价一个月12.5万美元,与百时美的PD-1免疫疗法Opdivo和默沙东的PD-1免疫疗法Keytruda售价相当,后2者均靶向PD-1蛋白,而罗氏Tecentriq靶向的是PD-1/PD-L1信号通路中与之互补的PD-L1蛋白,该蛋白广泛表达于机体多种免疫细胞和多种癌细胞表面。罗氏认为,PD-L1靶标将成为癌症免疫治疗领域一个更重要的引擎,将赋予Tecentriq更大的优势。商业前景方面,业界所达成的共识是,Tecentriq在2020年的销售额将达到25亿美元。
参考资料:
[1]http://www.roche.com/investors/updates/inv-update-2016-09-01.htm?from=timeline&isappinstalled
[2]http://www.fiercebiotech.com/roche-bags-a-quick-approval-for-pd-l1-blockbuster-contender-atezo
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