中国药学(英文版) ›› 2021, Vol. 30 ›› Issue (5): 393-408.DOI: 10.5246/jcps.2021.05.031
孙星1, 杨昌永1, 林侃1, 周彩红1, 廖成1, 张利敏2, 金薪盛2, 毛浪勇2, 应华2, 陶维康2, 张连山3,*()
收稿日期:
2021-03-14
修回日期:
2021-04-10
接受日期:
2021-04-23
出版日期:
2021-05-31
发布日期:
2021-05-29
通讯作者:
张连山
作者简介:
Xing Sun1, Changyong Yang1, Kan Lin1, Caihong Zhou1, Chen Liao1, Limin Zhang2, Xinsheng Jin2, Langyong Mao2, Hua Ying2, Weikang Tao2, Lianshan Zhang3,*()
Received:
2021-03-14
Revised:
2021-04-10
Accepted:
2021-04-23
Online:
2021-05-31
Published:
2021-05-29
Contact:
Lianshan Zhang
摘要:
卡瑞利珠单抗是一种人源化的抗PD-1单克隆抗体。在体外与人和食蟹猴PD-1蛋白具有纳摩尔级别的高亲和力, 但不结合鼠源PD-1蛋白。它在体外有效阻断PD-1/PD-L1信号通路的同时还可以激活T细胞。卡瑞利珠单抗与PD-1独特的结合表位同PD-1和PD-L1结合表位有部分的重叠, 证明了卡瑞利珠单抗对PD-1/PD-L1具有很强的结合阻断活性。在PD-1转基因小鼠皮下移植瘤模型中, 卡瑞利珠单抗可以显著抑制MC-38和B16F10两种细胞在小鼠体内的生长, 抑瘤作用优于已上市的其它PD-1单抗。此外, 卡瑞利珠单抗在食蟹猴中表现出良好的药代动力学和安全性特征。并且, 我们发现了卡瑞利珠单抗具有很弱的VEGFR2结合活性, 但即使在很高的剂量下也不会激活VEGFR2信号通路。综上所述, 我们证明了卡瑞利珠单抗是优秀的肿瘤治疗药物, 现有数据也支持其在临床实践中进一步探索其有效性和安全性。
Supporting:
孙星, 杨昌永, 林侃, 周彩红, 廖成, 张利敏, 金薪盛, 毛浪勇, 应华, 陶维康, 张连山. 卡瑞利珠单抗, 一种人源化抗PD-1 IgG4亚型单克隆抗体在临床前研究中表现出优异的抗肿瘤活性以及良好的安全性[J]. 中国药学(英文版), 2021, 30(5): 393-408.
Xing Sun, Changyong Yang, Kan Lin, Caihong Zhou, Chen Liao, Limin Zhang, Xinsheng Jin, Langyong Mao, Hua Ying, Weikang Tao, Lianshan Zhang. Camrelizumab (SHR-1210), a humanized anti-PD-1 IgG4 mAb, exhibits superior anti-tumor activity and a favorable safety profile in preclinical studies[J]. Journal of Chinese Pharmaceutical Sciences, 2021, 30(5): 393-408.
Figure 1. The competitive binding ELISA of camrelizumab, HRP00339, and HRP00340. Camrelizumab inhibited the binding of itself to human PD-1, but did not inhibit either HRP00339 or HRP00340 for binding to human PD-1 (n = 2). Data were presented as mean ± SD.
Figure 2. (A) Overlay of the binding epitope structure for camrelizumab, human PD-L1, and human PD-1; (B) Overlay of the binding epitope structure for nivolumab, pembrolizumab, and human PD-1. The binding epitope structure of camrelizumab, nivolumab, pembrolizumab, human PD-L1, and human PD-1 is in magenta, yellow, green, cyan, and grey, respectively.
Figure 3. Antigen binding epitope mapping of camrelizumab, nivolumab, and pembrolizumab. SHR1210 denotes camrelizumab, Nivo denotes nivolumab, and Pembro denotes pembrolizumab. Pink: camrelizumab binding epitope amino acid residues; Yellow: nivolumab binding epitope amino acid residues; Green: pembrolizumab binding epitope amino acid residues; Blue: human PD-L1 binding epitope amino acid residues; Purple boxes: N-glycosylated residues; Brown boxes: disulfide-bonded residues.
Figure 4. The ability of camrelizumab and other PD-1 antibodies to block the interaction between PD-1 and PD-L1. Results were shown as mean ± SD of two representative experiments out of three.
Figure 5. Blocking activity evaluation of camrelizumab in a cell-based reporter assay. Results were shown as mean ± SD of one representative experiment out of three.
Figure 8. Anti-tumor effect of camrelizumab in MC38 model in humanized PD-1 transgenic mice (n = 6). Data were presented as mean ± SEM. *Denoted P < 0.05, **denoted P < 0.01.
Figure 9. Anti-tumor effect of camrelizumab in B16F10 model in humanized PD-1 transgenic mice (n = 8). Data were presented as mean ± SEM. *Denoted P < 0.05.
Table 5. PK parameters of camrelizumab in cynomolgus monkey after a single intravenous infusion at 1, 3 and 10 mg/kg (n = 6, half/sex). Data were presented as mean ± SD.
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