朱军教授:新一代BTK抑制剂Zanubrutinib具有多重优势

2018-11-29 佚名 肿瘤资讯

2018年12月1-4日,美国血液学年会(ASH)即将在美国·圣地亚哥召开。北京大学肿瘤医院宋玉琴教授将以口头报告的形式公布百济神州研发的新一代BTK抑制剂Zanubrutinib治疗复发/难治套细胞淋巴瘤的疗效及安全性II期临床试验研究结果。

2018年12月1-4日,美国血液学年会(ASH)即将在美国·圣地亚哥召开。北京大学肿瘤医院宋玉琴教授将以口头报告的形式公布百济神州研发的新一代BTK抑制剂Zanubrutinib治疗复发/难治套细胞淋巴瘤的疗效及安全性II期临床试验研究结果。

新一代BTK抑制剂Zanubrutinib单药治疗R/R MCL的II期临床试验数据即将公布

在12月1号即将召开的ASH会议期间,我们团队将汇报百济神州自主研发的BTK抑制剂Zanubrutinib单药治疗复发/难治套细胞淋巴瘤(R/R MCL)的II期临床研究结果。在过去,MCL疗效差、复发率高,缺乏有效的治疗药物。国外BTK抑制剂已获得MCL治疗批准,在中国患者人群中也开展了相应的临床试验,并获中国食品药品监督管理局批准治疗R/R MCL。与此同时,我国自主研发的同类药物包括百济神州Zanubrutinib同样开展了临床试验。目前,我们团队跟国内同行共同完成了Zanubrutinib治疗R/R MCL的II期临床试验,结果显示:总反应率(ORR)为80%-85%,59%的患者获得完全缓解率。相比之下,国内同类药物罕有在R/R MCL中获得如此优秀的疗效。因此,我们特别期待Zanubrutinib在B细胞淋巴瘤中能获得很好的疗效。

BTK激酶信号通路是B细胞中重要的信号传导路径,因此BTK抑制剂不仅对MCL有效,对其他B细胞淋巴瘤也可能都有效。目前,有研究已经证实其在慢性淋巴细胞白血病和其他惰性B细胞淋巴瘤具有疗效,另有临床数据证实其对某些特定亚型弥漫大B细胞淋巴瘤具有疗效。因此,Zanubrutinib的未来值得期待。希望此临床试验数据上报后,中国国家药品监督管理局(NMPA)能够尽快批准Zanubrutinib上市。除了第一代BTK抑制剂外,我国自主研发新药陆续获批可为中国患者带来新的选择。

Zanubrutinib较第一代BTK抑制剂更具优势:ORR 84%,CR率高达59%,安全性更好

在开展II期临床试验之前,临床前研究和I期临床试验发现,Zanubrutinib与第一代BTK抑制剂并不完全一致,分子结构的差异性导致其作用机制、对肿瘤细胞的影响以及有效率等方面与已上市的BTKi均存在差异。正因如此,Zanubrutinib才可发挥自己独特的作用,甚至在联合用药中发挥增敏作用。

目前已完成的II期临床试验结果显示,中位随访36周,在85例可评估的患者中,IRC评估的ORR为84%,高达59%的患者评估为CR。在获得治疗反应的患者中,估计24周无事件反应率为90%。随访24周时,患者无进展生存率(PFS率)约为82%;安全性方面,≥3级不良反应发生率低,出血事件发生率也较低,没有患者出现房颤/房扑或肿瘤溶解综合征。总体而言,Zanubrutinib有效率较高,安全可控,在某些方面未出现重大安全性事件。

Zanubrutinib获批将为包括MCL在内的多种B细胞淋巴瘤患者带来新选择

首先,我们很期待Zanubrutinib能够顺利获批上市。其次,我们认为Zanubrutinib的上市定会为中国淋巴瘤患者,特别是B细胞淋巴瘤患者,带来更多的治疗选择。未来将在更多的B细胞淋巴瘤患者中进一步探索Zanubrutinib相关问题,如不同类型、不同给药方式(单药或联合)、不同阶段和治疗时机(一线联合治疗或治疗后维持治疗)等。我们相信,Zanubrutinib的适应证将会在临床观察和尝试中愈加广泛。作为中国自主研发的1类新药,Zanubrutinib一旦获批将为我国淋巴瘤患者提供更好、更方便的药物选择。

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百济神州创始人、首席执行官兼董事长欧雷强先生评论道:“我们对我们的团队感到自豪,同时也感谢中国的临床研究者及患者,是他们让zanubrutinib的首次监管申请成为可能。这是百济神州的第一个NDA,也是公司的一个重大里程碑。我们期待提交更多zanubrutinib以及在研抗PD-1抗体替雷利珠单抗的监管申请。” BCR/BTK信号通路 百济神州中国区总经理兼公司总裁吴晓滨博士表示:“基于z