2019年,百济神州两款重磅产品泽布替尼和替雷利珠单抗将迎来多个里程碑,其中,替雷利珠单抗预计2019年Q3获批用于复发/难治性霍奇金淋巴瘤,将成为第6款国内获批的PD-1单抗,正式跻身国内PD-(L)1单抗第一大研发梯队。

       本文关注替雷利珠单抗,简单介绍霍奇金淋巴瘤和尿路上皮癌两个适应症的注册临床试验数据,同时梳理药物值得关注的临床试验。

       一.第6款国内PD-1单抗:替雷利珠单抗

       2019年05月31日,恒瑞医药卡瑞利珠单抗(商品名艾立妥)正式获批,替雷利珠单抗为代表的国内PD-(L)1单抗的开发进展再次引起广泛关注。

       同日,百济神州宣布国家药品监督管理局受理替雷利珠单抗sNDA,此次申请适应症为局部晚期或转移性尿路上皮癌的二线治疗(受理号CXSS1900025)。替雷利珠单抗成为继卡瑞利珠单抗后第2个递交新适应症上市申请的国产PD-(L)1单抗。

       替雷利珠单抗r/r-经典型霍奇金淋巴瘤和局部晚期或转移性尿路上皮癌两个适应症关键数据见下表。

       替雷利珠单抗两项注册临床试验数据

       2019年,替雷利珠单抗值得关注的里程碑事件:

       ♦ 2019年ASCO中,公布替雷利珠单抗用于治疗中国鼻咽癌患者的初步结果;

       ♦ 2019年3季度,获批用于r/r-经典型霍奇金淋巴瘤;

       ♦ 公布替雷利珠单抗亚洲尿路上皮癌关键2期临床试验CTR20170071数据;

       ♦ 公布替雷利珠单抗二/三线治疗肝细胞癌全球2期临床试验NCT03419897数据,并开展行政注册沟通

       ♦ 更新r/r-经典型霍奇金淋巴瘤2期临床试验数据;

       ♦ 基本完成4项用于肺癌/肝细胞癌的3期临床试验的患者招募。

       2019年ASCO中,百济神州替雷利珠单抗发布了5个poster,涵盖3项3期临床,2项早期临床。详细见下表。

       2019年ASCO:替雷利珠单抗

       *局部晚期或转移性非鳞非小细胞肺癌、鳞非小细胞肺癌或广泛期小细胞肺癌

       二.布局广泛:聚焦替雷利珠单抗11项临床试验

       备注:以下信息均来自百济神州官网。

第6款国内将获批PD-1单抗:替雷利珠单抗

       替雷利珠单抗:布局亚洲高发癌症

       根据百济神州官方信息,截至目前,替雷利珠单抗有11项3期或是关键2期临床试验正在进行中,其中肺癌适应症4个,肝癌2个,食管鳞状细胞癌2个,胃癌1个,尿路上皮癌1个,霍奇金淋巴瘤1个,详见附表1。这其中,国家药品监督管理局已经受理r/r-经典型霍奇金淋巴瘤和局部晚期或转移性尿路上皮癌两个适应症上市申请,同时笔者预计2019年Q3替雷利珠单抗将获批用于r/r-经典型霍奇金淋巴瘤,成为国内第6款获批上市的PD1单抗。

       ♦ More than 2,200 patients2 enrolled over 3 years across tislelizumab program, including combination trials 

       ♦ Broad development global program in collaboration with Celgene with additional Ph3/potential registration-enabling trials planned in lung, gastric, liver, and esophageal cancers 2L non-small cell lung cancer 1L hepatocellular carcinoma 2L esophageal squamous cell carcinoma 2L+ urothelial carcinoma Relapsed / Refractory (R/R) Hodgkin's lymphoma (NDA accepted) Solid tumors 2L/3L hepatocellular carcinoma3 R/R NK/T-cell lymphomas 10

       *Some indications will not require a non-pivotal Ph2 clinical trial prior to beginning pivotal Ph2 or 3 clinical trials. **Confirmatory clinical trials post-approval are required for accelerated approvals. 1. Celgene has the right to develop and commercialize tislelizumab in solid tumors in the United States, European Union, Japan and the rest-of-world outside of Asia; BeiGene retains rights to hematologic malignancies and internal combinations. 2. as of January 25, 2019. 3. global study and potentially registration-enabling in certain countries

       *Tislelizumab dosage 200mg every three weeks, Q3W. Global Ph3 trial in Stage III NSCLC is run by Celgene; global Ph2 in R/R/ NK/T-cell lymphoma and Ph2 trial in MSI-H or dMMR solid tumors in China are potentially registrational-enabling trials. OS: Overall survival; ORR: Overall response rate; PFS: Progression-free survival; cCRT: concurrent chemoradiotherapy; IRC: Independent Review Committee; ITT: Intent-to-treat

       截止2019年06月01日,国内已有5款PD-1单抗获批,替雷利珠单抗将会紧挨恒瑞医药卡瑞利珠单抗在国内批准上市,替雷利珠单抗单药或是联合化疗具有良好的安全性、耐受性,能够给多种癌症患者带来明显的临床获益,药物凭借霍奇金淋巴瘤获批上市后,在多个亚洲高发癌症适应症均有布局,如肺癌、肝癌、胃癌,并且已经处于3期临床,同时百济神州仍在探索替雷利珠单抗与pamiparib或泽布替尼的联合用药策略,尤其是泽布替尼和替雷利珠单抗的联合用药备受关注,百济神州这两款药物均将具有良好的安全性、有效性和耐受性,目前初步临床数据[1]积极,但仍需长期关注,ibrutinib联合PD-(L)1单抗曾在多个早期临床中失败。希望替雷利珠单抗能够快速上市,进一步提高药物可及性,同时给中国高发癌症带来创新疗法!

       附表1:替雷利珠单抗值得关注的临床试验信息

       资料:

       1. A phase 1b study of the anti-PD-1 monoclonal antibody BGB-A317 (A317) in combination with the PARP inhibitor BGB-290 (290) in advanced solid tumors

       2. BeiGene Presents Initial Phase 1b Data for BTK Inhibitor Zanubrutinib (BGB-3111) Combined with PD-1 Antibody Tislelizumab (BGB-A317) at the 59th American Society of Hematology Annual Meeting

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