CN113321734A - 抗cd47/抗pd-l1抗体及其应用 - Google Patents
抗cd47/抗pd-l1抗体及其应用 Download PDFInfo
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- CN113321734A CN113321734A CN202110221785.5A CN202110221785A CN113321734A CN 113321734 A CN113321734 A CN 113321734A CN 202110221785 A CN202110221785 A CN 202110221785A CN 113321734 A CN113321734 A CN 113321734A
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Abstract
本发明涉及抗体药物技术领域,尤其涉及抗CD47/抗PD‑L1抗体,包含抗CD47/抗PD‑L1抗体的药物组合物及其应用。本发明的抗CD47/抗PD‑L1抗体具有显著的抗肿瘤活性,且不具有明显的红细胞毒性,可在制备抗肿瘤的药物中应用。
Description
技术领域
本发明涉及抗体药物技术领域,尤其涉及抗CD47/抗PD-L1抗体,包含抗CD47/抗PD-L1抗体的药物组合物及其应用。
背景技术
CD47蛋白又称整合素相关蛋白(IAP),属于IgG超家族的一个五次跨膜糖蛋白,广泛表达于不同组织细胞。CD47可与配体TSP-1或SIRPα结合,调控不同的细胞功能,包括细胞迁移、粘附、凋亡,轴突延伸,细胞因子产生及T细胞激活。SIRPα是一个含有典型免疫受体酪氨酸抑制基序(ITIM)跨膜蛋白,主要表达于髓系造血细胞膜表面,如巨噬细胞,树突状细胞等。CD47与SIRPα结合后,导致ITIMs的磷酸化,从而招募SHP-1/SHP-2,进而抑制肌球蛋白IIA在吞噬突触的积累,最终抑制吞噬细胞的吞噬功能。
肿瘤细胞的“免疫逃逸”被认为是肿瘤发生、发展和抗药的主要机制。肿瘤细胞通过高表达CD47分子,与巨噬细胞表面的SIRPα相互作用,可显著抑制巨噬细胞的吞噬活性,避免被巨噬细胞吞噬掉。当阻断CD47与SIRPα的结合时,可消除因肿瘤导致的免疫抑制或免疫耐受,有效杀伤肿瘤细胞。这为CD47的肿瘤免疫靶向治疗提供了极为有力的理论依据。
近年来,国内外针对CD47/SIRPα信号通路的各种治疗方式进行了大量研究,其中CD47阻断性抗体被认为是其中最有希望的肿瘤治疗方案。人CD47阻断型单抗的有效性已经在多种临床前模型中证实。不过,由于红细胞、血小板也表达CD47分子,当抗体阻断CD47与SIRPα的相互作用时,可能导致这些细胞失去“别吃我”信号的保护,进而被巨噬细胞吞噬。因此要避免抗CD47抗体的副作用,比如血小板降解,红细胞凝集,红细胞耗竭,贫血等也是应用抗CD47抗体需要考虑的一个重点。
程序性死亡配体1(PD-L1),也称为分化簇274(CD274)或B7同系物1(B7-H1),是一种40kDa的1型跨膜蛋白,其在特定事件(例如妊娠、组织同种异体移植、自身免疫疾病和其他疾病状态如肝炎)期间在抑制免疫系统的过程中起主要作用。PD-L1与PD-1或B7.1的结合传递抑制性信号,该抑制性信号减少CD8+T细胞在淋巴结处的增殖,并且对该PD-1的补充也能够通过进一步由基因Bcl-2的更低调节介导的细胞凋亡来控制外来抗原特异性T细胞在淋巴结中的积累。
已经显示PD-L1的上调可以允许癌症逃避宿主免疫系统。对来自肾细胞癌患者的肿瘤样本的分析发现,PD-L1的高肿瘤表达与增加的肿瘤侵袭性和增加的死亡风险相关。许多PD-L1抑制剂作为免疫肿瘤学疗法正在开发中,并且在临床试验中正在展现出良好的结果。
CD47-SIRPα信号通路不但激活固有免疫,巨噬细胞还将肿瘤抗原呈递给CD8+T、CD4+T细胞,通过促进T细胞激活,进一步杀伤肿瘤。因此,可以开发一种靶向CD47与PD-L1的双功能融合蛋白,该融合蛋白包含CD47结合部分和PD-L1结合部分,既能阻断PD-L1与PD-1的结合,又能阻断CD47与SIRPα的结合,把先天免疫和获得性免疫信号通路桥联在一起,从而具有更好的抗肿瘤活性、肿瘤靶向性和更低的红细胞毒性。
发明内容
本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中所述抗CD47抗体或其抗原结合片段包含第一重链可变区和/或第一轻链可变区,其中所述第一重链可变区包含第一重链可变区的互补决定区1(H1CDR1)、第一重链可变区的互补决定区2(H1CDR2)和/或第一重链可变区的互补决定区3(H1CDR3),所述第一轻链可变区包含第一轻链可变区的互补决定区1(L1CDR1)、第一轻链可变区的互补决定区2(L1CDR2)和/或第一轻链可变区的互补决定区3(L1CDR3);和所述抗PD-L1抗体或其抗原结合片段为特异性结合PD-L1的抗体或其抗原结合片段。
在一些实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中所述抗CD47抗体或其抗原结合片段包含第一重链可变区和第一轻链可变区,其中:
(1)所述第一重链可变区包含选自如下组的H1CDR1、H1CDR2和H1CDR3:
(a1)如SEQ ID NO:1、2和3所示的氨基酸序列;
(a2)如SEQ ID NO:10、2和11所示的氨基酸序列;
(a3)如SEQ ID NO:4、5和6所示的氨基酸序列;和
(a4)如SEQ ID NO:7、8和9所示的氨基酸序列;
(a5)与(a1)、(a2)、(a3)或(a4)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;和
(2)所述第一轻链可变区包含选自如下组的L1CDR1、L1CDR2和L1CDR3:
(a6)如SEQ ID NO:12、13和14所示的氨基酸序列;
(a7)如SEQ ID NO:15、16和17所示的氨基酸序列;和
(a8)如SEQ ID NO:18、19和20所示的氨基酸序列;
(a9)与(a6)、(a7)或(a8)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列。
在一些实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗CD47抗体或其抗原结合片段具有:
所述H1CDR1、H1CDR2和H1CDR3分别为SEQ ID NO:1、2和3或与SEQ ID NO:1、2和3所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一重链可变区,和所述L1CDR1、L1CDR2和L1CDR3分别为SEQ ID NO:12、13和14或与SEQ ID NO:12、13和14所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一轻链可变区;
所述H1CDR1、H1CDR2和H1CDR3分别为SEQ ID NO:10、2和11或与SEQ ID NO:10、2和11所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一重链可变区,和所述L1CDR1、L1CDR2和L1CDR3分别为SEQ ID NO:12、13和14或与SEQ ID NO:12、13和14所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一轻链可变区;
所述H1CDR1、H1CDR2和H1CDR3分别为SEQ ID NO:4、5和6或与SEQ ID NO:4、5和6所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一重链可变区,和所述L1CDR1、L1CDR2和L1CDR3分别为SEQ ID NO:15、16和17或与SEQ ID NO:15、16和17所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一轻链可变区;或
所述H1CDR1、H1CDR2和H1CDR3分别为SEQ ID NO:7、8和9或与SEQ ID NO:7、8和9所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一重链可变区,和所述L1CDR1、L1CDR2和L1CDR3分别为SEQ ID NO:18、19和20或与SEQ ID NO:18、19和20所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一轻链可变区。
在一些实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗CD47抗体或其抗原结合片段包含第一重链可变区和第一轻链可变区,其中:
(1)所述第一重链可变区的氨基酸序列选自:
(b1)如SEQ ID NO:21、SEQ ID NO:22、SEQ ID NO:23、SEQ ID NO:27所示的氨基酸序列;
(b2)(b1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(b1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(b3)与(b1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第一轻链可变区的氨基酸序列选自:
(b4)如SEQ ID NO:24、SEQ ID NO:25、SEQ ID NO:26、SEQ ID NO:28所示的氨基酸序列;
(b5)(b4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(b4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(b6)与(b4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列。
在一些实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗CD47抗体或其抗原结合片段包含第一重链可变区和第一轻链可变区,其中:
所述第一重链可变区的氨基酸序列为SEQ ID NO:21,SEQ ID NO:21经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:21功能相同的氨基酸序列或与SEQ IDNO:21具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQID NO:24,SEQ ID NO:24经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:24功能相同的氨基酸序列或与SEQ ID NO:24具有至少85%序列同一性的氨基酸序列;
所述第一重链可变区的氨基酸序列为SEQ ID NO:22,SEQ ID NO:22经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:22功能相同的氨基酸序列或与SEQ IDNO:22具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQID NO:25,SEQ ID NO:25经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:25功能相同的氨基酸序列或与SEQ ID NO:25具有至少85%序列同一性的氨基酸序列;
所述第一重链可变区的氨基酸序列为SEQ ID NO:23,SEQ ID NO:23经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:23功能相同的氨基酸序列或与SEQ IDNO:23具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQID NO:26,SEQ ID NO:26经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:26功能相同的氨基酸序列或与SEQ ID NO:26具有至少85%序列同一性的氨基酸序列;
所述第一重链可变区的氨基酸序列为SEQ ID NO:27,SEQ ID NO:27经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:27功能相同的氨基酸序列或与SEQ IDNO:27具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQID NO:24,SEQ ID NO:24经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:24功能相同的氨基酸序列或与SEQ ID NO:24具有至少85%序列同一性的氨基酸序列;或
所述第一重链可变区的氨基酸序列为SEQ ID NO:23,SEQ ID NO:23经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:23功能相同的氨基酸序列或与SEQ IDNO:23具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQID NO:28,SEQ ID NO:28经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:28功能相同的氨基酸序列或与SEQ ID NO:28具有至少85%序列同一性的氨基酸序列。
在一些实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗CD47抗体或其抗原结合片段为人源化抗体或其抗原结合片段,其包含第一重链可变区和第一轻链可变区,其中:
(1)所述第一重链可变区的氨基酸序列选自:
(c1)如SEQ ID NO:29、SEQ ID NO:30、SEQ ID NO:31所示的氨基酸序列;
(c2)(c1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(c1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(c3)与(c1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第一轻链可变区的氨基酸序列选自:
(c4)如SEQ ID NO:32、SEQ ID NO:33、SEQ ID NO:34所示的氨基酸序列;
(c5)(c4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(c4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(c6)与(c4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列。
在一些实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗CD47抗体或其抗原结合片段为人源化抗体或其抗原结合片段,其包含第一重链可变区和第一轻链可变区,其中
所述第一重链可变区的氨基酸序列为SEQ ID NO:29,SEQ ID NO:29经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:29功能相同的氨基酸序列或与SEQ IDNO:29具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQID NO:32,SEQ ID NO:32经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:32功能相同的氨基酸序列或与SEQ ID NO:32具有至少85%序列同一性的氨基酸序列;
所述第一重链可变区的氨基酸序列为SEQ ID NO:30,SEQ ID NO:30经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:30功能相同的氨基酸序列或与SEQ IDNO:30具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQID NO:33,SEQ ID NO:33经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:33功能相同的氨基酸序列或与SEQ ID NO:33具有至少85%序列同一性的氨基酸序列;或
所述第一重链可变区的氨基酸序列为SEQ ID NO:31,SEQ ID NO:31经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:31功能相同的氨基酸序列或与SEQ IDNO:31具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQID NO:34,SEQ ID NO:34经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:34功能相同的氨基酸序列或与SEQ ID NO:34具有至少85%序列同一性的氨基酸序列。
在一些实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中:
所述抗CD47抗体或其抗原结合片段包含第一重链可变区和第一轻链可变区,其中:
(1)所述第一重链可变区包含H1CDR1、H1CDR2和H1CDR3,其氨基酸序列分别为SEQID NO:4、5和6或与SEQ ID NO:4、5和6所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;和
(2)所述第一轻链可变区包含L1CDR1、L1CDR2和L1CDR3,其氨基酸序列分别为SEQID NO:15、16和17或与SEQ ID NO:15、16和17所示的氨基酸序列具有至少85%序列同一性的氨基酸序列。
在一些优选的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中所述抗CD47抗体或其抗原结合片段如以上实施方案中所限定;和所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和/或第二轻链可变区,其中所述第二重链可变区包含第二重链可变区的互补决定区1(H2CDR1)、第二重链可变区的互补决定区2(H2CDR2)和/或第二重链可变区的互补决定区3(H2CDR3),所述第二轻链可变区包含第二轻链可变区的互补决定区1(L2CDR1)、第二轻链可变区的互补决定区2(L2CDR2)和/或第二轻链可变区的互补决定区3(L2CDR3)区。
进一步优选地,在一些实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中所述抗CD47抗体或其抗原结合片段如以上实施方案中所限定,和所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和第二轻链可变区,其中:
(1)所述第二重链可变区包含选自如下组的H2CDR1、H2CDR2和H2CDR3:
(A1)如SEQ ID NO:75、76和77所示的氨基酸序列;
(A2)如SEQ ID NO:81、82和83所示的氨基酸序列;
(A3)如SEQ ID NO:87、88和89所示的氨基酸序列;和
(A4)如SEQ ID NO:93、94和95所示的氨基酸序列;
(A5)与(A1)、(A2)、(A3)或(A4)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;和
(2)所述第二轻链可变区包含选自如下组的L2CDR1、L2CDR2和L2CDR3:
(A6)如SEQ ID NO:78、79和80所示的氨基酸序列;
(A7)如SEQ ID NO:84、85和86所示的氨基酸序列;
(A8)如SEQ ID NO:90、91和92所示的氨基酸序列;
(A9)如SEQ ID NO:96、97和98所示的氨基酸序列;
(A10)与(A6)、(A7)、(A8)或(A9)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列。
在一些具体的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中:
所述抗CD47抗体或其抗原结合片段包含第一重链可变区和第一轻链可变区,其中:
(1)所述第一重链可变区包含H1CDR1、H1CDR2和H1CDR3,其氨基酸序列分别为SEQID NO:4、5和6或与SEQ ID NO:4、5和6所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;
(2)所述第一轻链可变区包含L1CDR1、L1CDR2和L1CDR3,其氨基酸序列分别为SEQID NO:15、16和17或与SEQ ID NO:15、16和17所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;和
所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和第二轻链可变区,其中:
(1)所述第二重链可变区包含选自如下组的H2CDR1、H2CDR2和H2CDR3:
(A1)如SEQ ID NO:75、76和77所示的氨基酸序列;
(A2)如SEQ ID NO:81、82和83所示的氨基酸序列;
(A3)如SEQ ID NO:87、88和89所示的氨基酸序列;和
(A4)如SEQ ID NO:93、94和95所示的氨基酸序列;
(A5)与(A1)、(A2)、(A3)或(A4)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;和
(2)所述第二轻链可变区包含选自如下组的L2CDR1、L2CDR2和L2CDR3:
(A6)如SEQ ID NO:78、79和80所示的氨基酸序列;
(A7)如SEQ ID NO:84、85和86所示的氨基酸序列;
(A8)如SEQ ID NO:90、91和92所示的氨基酸序列;
(A9)如SEQ ID NO:96、97和98所示的氨基酸序列;
(A10)与(A6)、(A7)、(A8)或(A9)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列。
在一个具体的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中所述抗CD47抗体或其抗原结合片段包含所述H1CDR1、H1CDR2和H1CDR3分别为SEQ ID NO:4、5和6或与SEQ ID NO:4、5和6所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一重链可变区,和所述L1CDR1、L1CDR2和L1CDR3分别为SEQ ID NO:15、16和17或与SEQ ID NO:15、16和17所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一轻链可变区;和所述抗PD-L1抗体或其抗原结合片段包含所述H2CDR1、H2CDR2和H2CDR3分别为SEQ ID NO:75、76和77或与SEQID NO:75、76和77所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二重链可变区,和所述L2CDR1、L2CDR2和L2CDR3分别为SEQ ID NO:78、79和80或与SEQ ID NO:78、79和80所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二轻链可变区。
在一个具体的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中所述抗CD47抗体或其抗原结合片段包含所述H1CDR1、H1CDR2和H1CDR3分别为SEQ ID NO:4、5和6或与SEQ ID NO:4、5和6所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一重链可变区,和所述L1CDR1、L1CDR2和L1CDR3分别为SEQ ID NO:15、16和17或与SEQ ID NO:15、16和17所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一轻链可变区;和所述抗PD-L1抗体或其抗原结合片段包含所述H2CDR1、H2CDR2和H2CDR3分别为SEQ ID NO:81、82和83或与SEQID NO:81、82和83所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二重链可变区,和所述L2CDR1、L2CDR2和L2CDR3分别为SEQ ID NO:84、85和86或与SEQ ID NO:84、85和86所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二轻链可变区。
在一个具体的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中所述抗CD47抗体或其抗原结合片段包含所述H1CDR1、H1CDR2和H1CDR3分别为SEQ ID NO:4、5和6或与SEQ ID NO:4、5和6所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一重链可变区,和所述L1CDR1、L1CDR2和L1CDR3分别为SEQ ID NO:15、16和17或与SEQ ID NO:15、16和17所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一轻链可变区;和所述抗PD-L1抗体或其抗原结合片段包含所述H2CDR1、H2CDR2和H2CDR3分别为SEQ ID NO:87、88和89或与SEQID NO:87、88和89所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二重链可变区,和所述L2CDR1、L2CDR2和L2CDR3分别为SEQ ID NO:90、91和92或与SEQ ID NO:90、91和92所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二轻链可变区。
在一个具体的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中所述抗CD47抗体或其抗原结合片段包含所述H1CDR1、H1CDR2和H1CDR3分别为SEQ ID NO:4、5和6或与SEQ ID NO:4、5和6所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一重链可变区,和所述L1CDR1、L1CDR2和L1CDR3分别为SEQ ID NO:15、16和17或与SEQ ID NO:15、16和17所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第一轻链可变区;和所述抗PD-L1抗体或其抗原结合片段包含所述H2CDR1、H2CDR2和H2CDR3分别为SEQ ID NO:93、94和95或与SEQID NO:93、94和95所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二重链可变区,和所述L2CDR1、L2CDR2和L2CDR3分别为SEQ ID NO:96、97和98或与SEQ ID NO:96、97和98所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二轻链可变区。
在一些具体的实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗CD47抗体或其抗原结合片段以及抗PD-L1抗体或其抗原结合片段各自独立地为鼠源抗体、嵌合抗体、人源化抗体或完全人抗体。
在一些具体的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其中所述抗CD47抗体或其抗原结合片段包含第一重链可变区和第一轻链可变区,其中:
(1)所述第一重链可变区的氨基酸序列选自:
(b1)如SEQ ID NO:22和SEQ ID NO:30所示的氨基酸序列;
(b2)(b1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的且与(b1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(b3)与(b1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第一轻链可变区的氨基酸序列选自:
(b4)如SEQ ID NO:25和SEQ ID NO:33所示的氨基酸序列;
(b5)(b4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的且与(b4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(b6)与(b4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和第二轻链可变区,其中:
(1)所述第二重链可变区的氨基酸序列选自:
(B1)如SEQ ID NO:99、100、101、102、110、111、112、113、114、119、120、121、122和123所示的氨基酸序列;
(B2)(B1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(B1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(B3)与(B1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第二轻链可变区的氨基酸序列选自:
(B4)如SEQ ID NO:103、104、105、106、115、116、117、118、124、125、126所示的氨基酸序列;
(B5)(B4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(B4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(B6)与(B4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列。
在一些具体的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其中所述第一重链可变区的氨基酸序列为SEQ ID NO:22,SEQ ID NO:22经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:22功能相同的氨基酸序列或与SEQ ID NO:22具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQ ID NO:25,SEQ IDNO:25经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:25功能相同的氨基酸序列或与SEQ ID NO:25具有至少85%序列同一性的氨基酸序列。
在一些具体的实施方案中,本发明提供一种抗CD47/抗PD-L1抗体,其中所述第一重链可变区的氨基酸序列为SEQ ID NO:22,SEQ ID NO:22经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:22功能相同的氨基酸序列或与SEQ ID NO:22具有至少85%序列同一性且所述H1CDR1、H1CDR2和H1CDR3如SEQ ID NO:4、5和6所示的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQ ID NO:25,SEQ ID NO:25经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:25功能相同的氨基酸序列或与SEQ ID NO:25具有至少85%序列同一性且所述L1CDR1、L1CDR2和L1CDR3如SEQ ID NO:15、16和17所示的氨基酸序列。
在一些具体的实施方案中,根据本发明的抗CD47/抗PD-L1抗体,其中所述抗CD47抗体或抗PD-L1抗体可以为鼠源抗体,其还含有鼠源的IgG1、IgG2、IgG3或IgG4或其变体的重链恒定区,和鼠源的κ链或其变体的轻链恒定区。
在一些优选的实施方案中,根据本发明的抗CD47/抗PD-L1抗体,其中所述抗CD47鼠源抗体还含有鼠源的IgG1或IgG2或其变体的重链恒定区,和鼠源κ链或其变体的轻链恒定区。
在一些具体的实施方案中,本发明提供抗CD47/抗PD-L1抗体,其中所述抗CD47抗体或其抗原结合片段包含第一重链可变区和第一轻链可变区,其中:
(1)所述第一重链可变区的氨基酸序列选自:
(c1)如SEQ ID NO:30所示的氨基酸序列;
(c2)(c1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的且与(c1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(c3)与(c1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第一轻链可变区的氨基酸序列选自:
(c4)如SEQ ID NO:33所示的氨基酸序列;
(c5)(c4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的且与(c4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(c6)与(c4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和第二轻链可变区,其中:
(1)所述第二重链可变区的氨基酸序列选自:
(C1)如SEQ ID NO:110、111、112、113、114、119、120、121、122和123所示的氨基酸序列;
(C2)(C1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(C1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(C3)与(C1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第二轻链可变区的氨基酸序列选自:
(C4)如SEQ ID NO:115、116、117、118、124、125、126所示的氨基酸序列;
(C5)(C4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(C4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(C6)与(C4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列。
在一些具体的实施方案中,本发明提供抗CD47/抗PD-L1抗体,其中所述第一重链可变区的氨基酸序列为SEQ ID NO:30,SEQ ID NO:30经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:30功能相同的氨基酸序列或与SEQ ID NO:30具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQ ID NO:33,SEQ ID NO:33经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:33功能相同的氨基酸序列或与SEQ ID NO:33具有至少85%序列同一性的氨基酸序列;和所述第二重链可变区的氨基酸序列为SEQ ID NO:110、111、112、113或114所示的氨基酸序列,SEQ ID NO:110、111、112、113或114经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:110、111、112、113或114功能相同的氨基酸序列或与SEQ ID NO:110、111、112、113或114具有至少85%序列同一性的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:115、116、117或118,SEQ ID NO:115、116、117或118经取代、缺失或添加一个或多个氨基酸获得的且与SEQID NO:115、116、117或118功能相同的氨基酸序列或与SEQ ID NO:115、116、117或118具有至少85%序列同一性的氨基酸序列。
在一些具体的实施方案中,本发明提供抗CD47/抗PD-L1抗体,其中所述第一重链可变区的氨基酸序列为SEQ ID NO:30,SEQ ID NO:30经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:30功能相同的氨基酸序列或与SEQ ID NO:30具有至少85%序列同一性的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQ ID NO:33,SEQ ID NO:33经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:33功能相同的氨基酸序列或与SEQ ID NO:33具有至少85%序列同一性的氨基酸序列;和所述第二重链可变区的氨基酸序列为SEQ ID NO:119、120、121、122或123所示的氨基酸序列,SEQ ID NO:119、120、121、122或123经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:119、120、121、122或123功能相同的氨基酸序列或与SEQ ID NO:119、120、121、122或123具有至少85%序列同一性的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:124、125或126,SEQID NO:124、125或126经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:124、125或126功能相同的氨基酸序列或与SEQ ID NO:124、125或126具有至少85%序列同一性的氨基酸序列。
在一些具体的实施方案中,本发明提供抗CD47/抗PD-L1抗体,其中所述第一重链可变区的氨基酸序列为SEQ ID NO:30,SEQ ID NO:30经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:30功能相同的氨基酸序列或与SEQ ID NO:30具有至少85%序列同一性且所述H1CDR1、H1CDR2和H1CDR3如SEQ ID NO:4、5和6所示的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQ ID NO:33,SEQ ID NO:33经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:33功能相同的氨基酸序列或与SEQ ID NO:33具有至少85%序列同一性且所述L1CDR1、L1CDR2和L1CDR3如SEQ ID NO:15、16和17所示的氨基酸序列;和所述第二重链可变区的氨基酸序列为SEQ ID NO:110、111、112、113或114所示的氨基酸序列,SEQ ID NO:110、111、112、113或114经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:110、111、112、113或114功能相同的氨基酸序列或与SEQ ID NO:110、111、112、113或114具有至少85%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:75、76和77所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:115、116、117或118,SEQ ID NO:115、116、117或118经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:115、116、117或118功能相同的氨基酸序列或与SEQ ID NO:115、116、117或118具有至少85%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ ID NO:78、79和80所示的氨基酸序列。
在一些具体的实施方案中,本发明提供抗CD47/抗PD-L1抗体,其中所述第一重链可变区的氨基酸序列为SEQ ID NO:30,SEQ ID NO:30经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:30功能相同的氨基酸序列或与SEQ ID NO:30具有至少85%序列同一性且所述H1CDR1、H1CDR2和H1CDR3如SEQ ID NO:4、5和6所示的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQ ID NO:33,SEQ ID NO:33经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:33功能相同的氨基酸序列或与SEQ ID NO:33具有至少85%序列同一性且所述L1CDR1、L1CDR2和L1CDR3如SEQ ID NO:15、16和17所示的氨基酸序列;和所述第二重链可变区的氨基酸序列为SEQ ID NO:110、111、112、113或114所示的氨基酸序列,SEQ ID NO:110、111、112、113或114经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:110、111、112、113或114功能相同的氨基酸序列或与SEQ ID NO:110、111、112、113或114具有至少85%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:87、88和89所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:115、116、117或118,SEQ ID NO:115、116、117或118经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:115、116、117或118功能相同的氨基酸序列或与SEQ ID NO:115、116、117或118具有至少85%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ ID NO:90、91和92所示的氨基酸序列。
在一些优选的实施方案中,本发明提供抗CD47/抗PD-L1抗体,其中所述第一重链可变区的氨基酸序列为SEQ ID NO:30,SEQ ID NO:30经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:30功能相同的氨基酸序列或与SEQ ID NO:30具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H1CDR1、H1CDR2和H1CDR3如SEQ ID NO:4、5和6所示的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQ ID NO:33,SEQ IDNO:33经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:33功能相同的氨基酸序列或与SEQ ID NO:33具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L1CDR1、L1CDR2和L1CDR3如SEQ ID NO:15、16和17所示的氨基酸序列;和所述第二重链可变区的氨基酸序列为SEQ ID NO:112所示的氨基酸序列,SEQ ID NO:112经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:112功能相同的氨基酸序列或与SEQ ID NO:112具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:75、76和77所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:116,SEQ ID NO:116经取代、缺失或添加一个或多个氨基酸获得的且与SEQID NO:116功能相同的氨基酸序列或与SEQ ID NO:116具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ ID NO:78、79和80所示的氨基酸序列。
在另一些优选的实施方案中,本发明提供抗CD47/抗PD-L1抗体,其中所述第一重链可变区的氨基酸序列为SEQ ID NO:30,SEQ ID NO:30经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:30功能相同的氨基酸序列或与SEQ ID NO:30具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H1CDR1、H1CDR2和H1CDR3如SEQ IDNO:4、5和6所示的氨基酸序列,且所述第一轻链可变区的氨基酸序列为SEQ ID NO:33,SEQID NO:33经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:33功能相同的氨基酸序列或与SEQ ID NO:33具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L1CDR1、L1CDR2和L1CDR3如SEQ ID NO:15、16和17所示的氨基酸序列;和所述第二重链可变区的氨基酸序列为SEQ ID NO:123所示的氨基酸序列,SEQ ID NO:123经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:123功能相同的氨基酸序列或与SEQ IDNO:123具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:87、88和89所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:126,SEQ ID NO:126经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:126功能相同的氨基酸序列或与SEQ ID NO:126具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ ID NO:90、91和92所示的氨基酸序列。
在一些实施方案中,本发明提供一种抗CD47/抗PD-L1人源化抗体,其中所述重链包含人源的IgG1、IgG2、IgG3、IgG4或其变体的重链恒定区,所述轻链包含人源的κ、λ链或其变体的轻链恒定区。
在本发明一个优选的实施方案中,所述的鼠源抗CD47/抗PD-L1抗体,可进一步包含鼠源κ、λ链或其变体的轻链恒定区,和/或进一步包含鼠源IgG1,IgG2,IgG3或IgG4或其变体的重链恒定区。
在本发明一个优选的实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗CD47抗体或其抗原结合片段的抗体轻链进一步包含鼠源κ、λ链或其突变序列的轻链恒定区。所述的抗CD47抗体或其抗原结合片段的抗体重链进一步包含鼠源IgG1、IgG2、IgG3、IgG4或其突变序列的重链恒定区,优选包含人源IgG1、IgG2、IgG4重链恒定区。
在一些具体的实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗CD47人源化抗体或其抗原结合片段还包含人源IgG1、IgG2、IgG3或IgG4或其变体的重链恒定区,和人源κ、λ链或其变体的轻链恒定区。在一些优选的实施方案中,本发明的抗CD47人源化抗体或其抗原结合片段还包含人源IgG1、IgG2、IgG4或其变体的重链恒定区,和人源κ链或其变体的轻链恒定区。
在本发明一个优选的实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗PD-L1抗体或其抗原结合片段的抗体重链进一步包含鼠源IgG1、IgG2、IgG3、IgG4或其突变序列的重链恒定区,优选包含人源IgG或其突变序列的重链恒定区;所述抗PD-L1抗体或其抗原结合片段的抗体轻链进一步包含鼠源κ、λ链或其突变序列的轻链恒定区。
在一些具体的实施方案中,根据本发明的抗CD47/抗PD-L1抗体,所述抗PD-L1人源化抗体或其抗原结合片段还包含人源IgG1、IgG2、IgG3或IgG4或其变体的重链恒定区,和人源κ、λ链或其变体的轻链恒定区。在一些优选的实施方案中,本发明的抗CD47人源化抗体或其抗原结合片段还包含人源IgG4或其变体的重链恒定区,和人源κ链或其变体的轻链恒定区。
在一些实施方案中,本发明提供抗CD47/抗PD-L1抗体,其中所述的抗CD47抗体或其抗原结合片段以及抗PD-L1抗体或其抗原结合片段分别为Fab、Fv、sFv或F(ab)2。在一个具体的实施方案中,本发明提供的抗CD47/抗PD-L1抗体为scF(ab)2。
优选地,本发明以上实施方案中的抗CD47/抗PD-L1抗体是抗CD47/抗PD-L1双特异性抗体。在一些实施方案中,所述双特异性抗体是人抗体或人源化抗体。在一些实施方案中,所述结合特异性之一是针对CD47,而另一个结合特异性是针对任何其它抗原。在一些实施方案中,所述结合特异性之一是针对CD47,而另一个结合特异性是针对PD-L1。在一些实施方案中,所述双特异性抗体可结合CD47的两种不同表位。所述双特异性抗体还可用于将细胞毒剂定位于表达CD47的细胞。这些抗体拥有CD47结合臂和细胞毒剂结合臂,所述细胞毒剂例如肥皂草毒蛋白、抗干扰素-α、长春花生物碱类、蓖麻毒蛋白A链、甲氨蝶呤或放射性同位素半抗原。可将本发明的双特异性抗体制备成全长抗体或抗体片段(例如F(ab')2双特异性抗体)。
制备双特异性抗体的方法是本领域已知的。传统上,双特异性抗体的重组制备基于两个免疫球蛋白重链-轻链对的共表达,其中两个重链具有不同的特异性(Millsteinand Cuello,Nature 305:537(1983))。由于免疫球蛋白重链和轻链的随机分配,这些杂交瘤(quadroma))可能产生10种不同抗体分子的混合物,其中只有一种分子具有正确的双特异性结构。该正确分子的纯化通常通过亲和层析步骤进行,相当麻烦且产物产量低。类似的方法在WO93/08829及Trauneckeretal.,EMBOJ.10:3655(1991)中有公开。
根据一种不同的方法,具有期望结合特异性(抗体-抗原结合位点)的抗体可变区与免疫球蛋白恒定区序列融合。在一些实施方案中,与包含至少部分铰链、CH2和CH3区的免疫球蛋白重链恒定区进行融合。在一些实施方案中,包含与轻链结合所必需位点的第一重链恒定区(CH1)存在于该融合的至少一部分中。将编码免疫球蛋白重链融合片段以及免疫球蛋白轻链(如果需要)的DNA插入不同的表达载体中并共转染入合适的宿主生物体。在用于构建的三种多肽链比例不等时提供最佳产量的实施方案中,这为调整三种多肽片段的相互比例提供极大的灵活性。不过,在至少两种多肽链以相同比例表达产生高产量时或比例没有特别意义时,有可能将两种或所有三种多肽链的编码序列插入一个表达载体中。
在该方法的一个实施方案中,所述双特异性抗体由一个臂中具有第一结合特异性的杂合免疫球蛋白重链和另一个臂中的杂合免疫球蛋白重链-轻链对(提供第二结合特异性)组成。由于免疫球蛋白轻链仅在该双特异性分子的一半中存在提供了便利的分离途径,因此发现该不对称性结构便于将期望的双特异性物质与不想要的免疫球蛋白链组合物分开。该方法在WO 94/04690中公开。关于产生双特异性抗体的进一步信息参见例如Sureshetal.,Methods in Enzymology 121:210(1986)。
根据另一种方法,可改造一对抗体分子间的界面以使从重组细胞培养物回收的异二聚体的百分比最大化。该界面包含抗体恒定区CH3结构域的至少一部分。在该方法中,将第一抗体分子界面的一个或多个小氨基酸侧链用较大侧链(例如酪氨酸或色氨酸)替换。通过将大氨基酸侧链用较小氨基酸侧链(例如丙氨酸或苏氨酸)替换,在第二抗体分子的界面上产生与大侧链相同或相似大小的补偿性“空腔”。这提供了提高异二聚体相比于其它不想要的终产物诸如同二聚体的产量的机制。
双特异性抗体包括交联或“异源缀合”抗体。例如,一种异源缀合抗体可以与亲合素偶联,另一种异源缀合抗体可以与生物素偶联。可使用任何便利的交联方法来制备异源缀合抗体。合适的交联剂是本领域众所周知的,连同许多交联技术一起在美国专利No.4,676,980中公开。
本发明的双特异性抗体可以由抗体片段生成。例如,可使用化学连接技术来制备双特异性抗体。Brennanetal.,Science 229:81(1985)描述了通过蛋白水解切割完整抗体以生成F(ab')2片段的方法。将这些片段在存在二硫醇络合剂亚砷酸钠的情况下(用以稳定邻近的二硫醇和防止分子间二硫键的形成)分解。然后将产生的Fab'片段转变为硫代硝基苯甲酸酯(TNB)衍生物。然后将Fab'-TNB衍生物之一通过巯基乙胺的还原重新恢复成Fab'-硫醇,并与等摩尔量的另一种Fab'-TNB衍生物混合,以形成双特异性抗体。
可以从大肠杆菌直接回收Fab'-SH片段,这些片段可化学偶联以形成双特异性抗体。Shalaby et al.,J.Exp.Med.175:217-225(1992)描述了完全人源化的双特异性抗体F(ab')2分子的生成。每个Fab'片段由大肠杆菌单独分泌,并在体外进行定向化学偶联以形成双特异性抗体。
在一些实施方案中,本发明的双特异性抗体片段可以直接从重组细胞培养物生成和分离。例如,可以使用亮氨酸拉链生成双特异性抗体(Kostelnyetal.,J.Immunol.148(5):1547-1553(1992))。将来自Fos和Jun蛋白的亮氨酸拉链肽通过基因融合与两种不同抗体的Fab'部分连接。抗体同二聚体在铰链区分解以形成单体,然后重新氧化以形成抗体异二聚体。该方法也可用于生成抗体同二聚体。双抗体技术提供了制备双特异性抗体片段的其他机制。所述双特异性抗体片段包含通过接头相连的重链可变区(VH)和轻链可变区(VL),所述接头太短以使得同一条链上的两个结构域之间不能配对。因此,迫使一个片段上的VH和VL结构域与另一个片段上的互补VL和VH结构域配对,由此形成两个抗原结合位点。在另一实施方案中,可以通过使用单链Fv(sFv)二聚体构建双特异性抗体片段。
本发明涵盖具有超过两价的多价抗体,例如,可制备三特异性抗体。多价抗体可以比二价抗体更快的受到表达该抗体结合的抗原的细胞的内在化(和/或异化)。本发明的抗体可以是可容易地通过编码抗体多肽链的核酸的重组表达而生成的、具有三个或更多抗原结合位点(例如四价抗体)的多价抗体。多价抗体可包含二聚化结构域和三个或更多抗原结合位点。在一些实施方案中,二聚化结构域包含(或由其组成)Fc区或铰链区。在这种情况中,抗体会包含Fc区及Fc区氨基末端的三个或更多抗原结合位点。在一些实施方案中,多价抗体包含(或由其组成)三个至大约八个抗原结合位点。在一些实施方案中,多价抗体包含四个抗原结合位点。多价抗体包含至少一条多肽链(例如两条多肽链),其中所述多肽链包含两个或更多可变区。本发明的多价抗体可进一步包含至少两条(例如四条)轻链可变区多肽。本发明的多价抗体可包含例如约两条至约八条轻链可变区多肽。本发明的轻链可变区多肽包含轻链可变区,且任选进一步包含CL结构域。
在包含CD47靶向部分和PD-L1靶向部分的双特异性抗体中,CD47靶向部分和PD-L1靶向部分之一可以是全长抗体,并且另一个可以是包含重链CDR、轻链CDR或其组合的抗原结合片段(例如scFv)。靶向CD47和PD-L1蛋白之一的全长抗体和靶向另一蛋白的抗原结合片段可以直接或通过肽接头以化学方式连接(例如共价连接)。抗原结合片段(例如scFv)可以直接或通过肽接头与全长抗体的N-末端(例如全长抗体的轻链或重链的N-末端)、全长抗体的C-末端(例如全长抗体的重链(或Fc或CH3结构域)的C-末端)或两者连接。
在一个实施方案中,双特异性抗体可以包含全长抗CD47抗体、抗PD-L1抗体的抗原结合片段(例如scFab、scFv)以及它们之间的肽接头。在其他实施方案中,双特异性抗体可以包含全长抗CD47抗体、抗PD-L1抗体的抗原结合片段(例如scFab、scFv)以及它们之间的肽接头。
在一个实施方案中,双特异性抗体中包含的scFv可以按任何顺序包含重链可变区和轻链可变区。例如,双特异性抗体中包含的scFv可以在从N-末端到C-末端的方向上包含重链可变区和轻链可变区以及任选地在它们之间的肽接头,或者可替代地,双特异性抗体中包含的scFv可以在从N-末端到C-末端的方向上包含轻链可变区和重链可变区以及任选地在它们之间的肽接头。
在一些实施方案中,所述肽接头可包括例如Gly、Asn和/或Ser残基,并且还可以包括中性氨基酸,例如Thr和/或Ala。适用于肽接头的氨基酸序列可以是相关领域中已知的那些。同时,可以在使得融合蛋白功能不受影响的这样的限度内不同地确定肽接头的长度。例如,肽接头可以通过包括总共约1至约100、约2至约50、或约5至约25个选自由Gly、Asn、Ser、Thr、和Ala组成的组的一种或多种来形成。在一个实施方案中,肽接头可以表示为(GmSl)n(m、l和n独立地是约1至约10的整数,特别是约2至约5的整数)。
在另一个实施方案中,PD-L1靶向部分和CD47靶向部分可以均是全长抗体或包含重链CDR、轻链CDR或其组合的抗原结合片段。
在另一个实施方案中,双特异性抗体可以是异二聚体形式,其包含第一臂和第二臂,该第一臂包括靶向CD47和PD-L1之一的一对第一重链和第一轻链,该第二臂包括靶向另一者的一对第二重链和第二轻链。
在一个实施方案中,全长抗体可以是全长免疫球蛋白形式(例如IgG、IgM、IgA、IgE或IgD,例如人IgG、人IgM、人IgA、人IgE或人IgD),并且抗原结合片段可以选自由Fab、Fab’、F(ab’)2、Fd、Fv、scFv、scFab、单链抗体、sdFv等组成的组。例如,全长抗体可以是全长人IgG(人IgG1、人IgG2、人IgG3或人IgG4)形式,并且抗原结合片段可以是scFv。
例如,本文描述的抗体可以包含柔性接头序列,或者可以被修饰以添加功能部分(例如PEG、药物、毒素或标记)。
在一些具体的实施方案中,根据本发明的抗CD47/抗PD-L1双特异性抗体,所述抗CD47抗体或其抗原结合片段的结构为(VL-CL)-肽接头-(VH)-IgG4CH,所述抗PD-L1抗体或其抗原结合片段的结构为(VL-CL)-肽接头-(VH)-IgG4CH。在一些具体的实施方案中,所述肽接头为(GGGGS)n形式,其中n为1-12,优选为3-10,更优选为6-8,例如6、7、8个GGGGS重复序列。在另一些具体的实施方案中,靶向CD47部分的(VL-CL)-肽接头-(VH)-IgG4CH中的IgG4CH为含有S228P、L235E、Y349C、T366S、L368A、Y407V突变形成“Hole”结构的IgG4CH段,靶向PD-L1部分的(VL-CL)-肽接头-(VH)-IgG4CH中的IgG4CH为含有S228P、L235E、T366W、S354C突变形成“Knob”结构的IgG4 CH段。在一些具体的实施方案中,靶向CD47部分的(VL-CL)-肽接头-(VH)-IgG4CH中的VL的氨基酸序列为SEQ ID NO:33,CL的氨基酸序列为SEQ IDNO:131,VH的氨基酸序列为SEQ ID NO:30,IgG4 CH的氨基酸序列为SEQ ID NO:133;和/或靶向PD-L1部分的(VL-CL)-肽接头-(VH)-IgG4CH中的VL的氨基酸序列为SEQ ID NO:116,CL的氨基酸序列为SEQ ID NO:131,VH的氨基酸序列为SEQ ID NO:112,IgG4 CH的氨基酸序列为SEQ ID NO:132。在另一些具体的实施方案中,靶向CD47部分的(VL-CL)-肽接头-(VH)-IgG4CH中的VL的氨基酸序列为SEQ ID NO:33,CL的氨基酸序列为SEQ ID NO:131,VH的氨基酸序列为SEQ ID NO:30,IgG4 CH的氨基酸序列为SEQ ID NO:133;和/或靶向PD-L1部分的(VL-CL)-肽接头-(VH)-IgG4CH中的VL的氨基酸序列为SEQ ID NO:126,CL的氨基酸序列为SEQ ID NO:131,VH的氨基酸序列为SEQ ID NO:123,IgG4 CH的氨基酸序列为SEQ ID NO:132。
本发明的另一方面提供抗PD-L1抗体或其抗原结合片段,其包含重链可变区和轻链可变区,其中:
(1)所述重链可变区包含选自如下组的CDR1、CDR2和CDR3:
(A1)如SEQ ID NO:75、76和77所示的氨基酸序列;
(A2)如SEQ ID NO:81、82和83所示的氨基酸序列;
(A3)如SEQ ID NO:87、88和89所示的氨基酸序列;和
(A4)如SEQ ID NO:93、94和95所示的氨基酸序列;
(A5)与(A1)、(A2)、(A3)或(A4)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;和
(2)所述轻链可变区包含选自如下组的CDR1、CDR2和CDR3:
(A6)如SEQ ID NO:78、79和80所示的氨基酸序列;
(A7)如SEQ ID NO:84、85和86所示的氨基酸序列;
(A8)如SEQ ID NO:90、91和92所示的氨基酸序列;
(A9)如SEQ ID NO:96、97和98所示的氨基酸序列;
(A10)与(A6)、(A7)、(A8)或(A9)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列。
在一些实施方案中,根据本发明的抗PD-L1抗体或其抗原结合片段,其中所述抗PD-L1抗体或其抗原结合片段包含:
所述CDR1、CDR2和CDR3分别为SEQ ID NO:75、76和77或与SEQ ID NO:75、76和77所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的重链可变区,和所述CDR1、CDR2和CDR3分别为SEQ ID NO:78、79和80或与SEQ ID NO:78、79和80所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的轻链可变区;
所述CDR1、CDR2和CDR3分别为SEQ ID NO:87、88和89或与SEQ ID NO:87、88和89所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的重链可变区,和所述CDR1、CDR2和CDR3分别为SEQ ID NO:90、91和92或与SEQ ID NO:90、91和92所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的轻链可变区;或者
所述CDR1、CDR2和CDR3分别为SEQ ID NO:93、94和95或与SEQ ID NO:93、94和95所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的重链可变区,和所述CDR1、CDR2和CDR3分别为SEQ ID NO:96、97和98或与SEQ ID NO:96、97和98所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的轻链可变区。
在一些实施方案中,根据本发明的抗PD-L1抗体或其抗原结合片段,其中:
(1)所述重链可变区的氨基酸序列选自:
(B1)如SEQ ID NO:99、100、101、102、110、111、112、113、114、119、120、121、122和123所示的氨基酸序列;
(B2)(B1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(B1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(B3)与(B1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述轻链可变区的氨基酸序列选自:
(B4)如SEQ ID NO:103、104、105、106、115、116、117、118、124、125、126所示的氨基酸序列;
(B5)(B4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(B4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(B6)与(B4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列。
在一些实施方案中,根据本发明的抗PD-L1抗体或其抗原结合片段,其中:
所述重链可变区的氨基酸序列为SEQ ID NO:110、111、112、113或114所示的氨基酸序列,SEQ ID NO:110、111、112、113或114经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:110、111、112、113或114功能相同的氨基酸序列或与SEQ ID NO:110、111、112、113或114具有至少85%序列同一性的氨基酸序列,且所述轻链可变区的氨基酸序列为SEQ ID NO:115、116、117或118,SEQ ID NO:115、116、117或118经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:115、116、117或118功能相同的氨基酸序列或与SEQ IDNO:115、116、117或118具有至少85%序列同一性的氨基酸序列。
在一些实施方案中,根据本发明的抗PD-L1抗体或其抗原结合片段,其中:
所述重链可变区的氨基酸序列为SEQ ID NO:119、120、121、122或123所示的氨基酸序列,SEQ ID NO:119、120、121、122或123经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:119、120、121、122或123功能相同的氨基酸序列或与SEQ ID NO:119、120、121、122或123具有至少85%序列同一性的氨基酸序列,且所述轻链可变区的氨基酸序列为SEQ ID NO:124、125或126,SEQ ID NO:124、125或126经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:124、125或126功能相同的氨基酸序列或与SEQ ID NO:124、125或126具有至少85%序列同一性的氨基酸序列。
在一些实施方案中,根据本发明的抗PD-L1抗体或其抗原结合片段,其中所述重链可变区的氨基酸序列为SEQ ID NO:112所示的氨基酸序列,SEQ ID NO:112经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:112功能相同的氨基酸序列或与SEQ ID NO:112具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:75、76和77所示的氨基酸序列,且所述轻链可变区的氨基酸序列为SEQ ID NO:116,SEQ ID NO:116经取代、缺失或添加一个或多个氨基酸获得的且与SEQ IDNO:116功能相同的氨基酸序列或与SEQ ID NO:116具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ ID NO:78、79和80所示的氨基酸序列。
在一些实施方案中,根据本发明的抗PD-L1抗体或其抗原结合片段,其中所述重链可变区的氨基酸序列为SEQ ID NO:123所示的氨基酸序列,SEQ ID NO:123经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:123功能相同的氨基酸序列或与SEQ ID NO:123具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:87、88和89所示的氨基酸序列,且所述轻链可变区的氨基酸序列为SEQ ID NO:126,SEQ ID NO:126经取代、缺失或添加一个或多个氨基酸获得的且与SEQ IDNO:126功能相同的氨基酸序列或与SEQ ID NO:126具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ ID NO:90、91和92所示的氨基酸序列。
在一些实施方案中,根据本发明的抗PD-L1抗体或其抗原结合片段,其中所述抗体是人源化抗体或完全人抗体。
本发明的另一方面提供分离的核酸。在一些实施方案中,根据本发明的分离的核酸编码本发明的抗CD47/抗PD-L1抗体或抗PD-L1抗体。在一些实施方案中,根据本发明的分离的核酸编码本发明的抗CD47抗体或其抗原结合片段。在另一些实施方案中,根据本发明的分离的核酸编码本发明的抗PD-L1抗体或其抗原结合片段。
在一个具体的实施方案中,根据本发明的分离的核酸,编码第一重链可变区SEQID NO:30的核苷酸序列如SEQ ID NO:36所示,且编码第一轻链可变区SEQ ID NO:33的核苷酸序列如SEQ ID NO:39所示。在另一个具体的实施方案中,根据本发明的分离的核酸,编码第二重链可变区SEQ ID NO:112的核苷酸序列如SEQ ID NO:127所示,且编码第二轻链可变区SEQ ID NO:116的核苷酸序列如SEQ ID NO:129所示。在再一个具体的实施方案中,根据本发明的分离的核酸,编码第二重链可变区SEQ ID NO:123的核苷酸序列如SEQ ID NO:128所示,且编码第二轻链可变区SEQ ID NO:126的核苷酸序列如SEQ ID NO:130所示。
本发明的另一方面提供表达载体。在一些实施方案中,本发明的表达载体表达本发明的抗CD47/抗PD-L1双特异性抗体或抗PD-L1抗体。在一些实施方案中,本发明的表达载体表达本发明的抗CD47抗体或其抗原结合片段。在另一些实施方案中,本发明的表达载体表达本发明的抗PD-L1抗体或其抗原结合片段。在一些实施方案中,根据本发明的表达载体,表达本发明的抗CD47抗体或其抗原结合片段的载体和表达本发明的抗PD-L1抗体或其抗原结合片段的载体是同种表达载体。根据本发明的表达载体其包含本发明的分离的核酸分子。
本发明的另一方面提供一种如上所述的表达载体转化的宿主细胞。
在一些实施方案中,根据本发明的宿主细胞选自原核细胞和真核细胞。在一些实施方案中,所述的宿主细胞为细菌,优选为大肠杆菌。在另一个优选的实施方案中,所述的宿主细胞为哺乳动物细胞。
本发明的另一方面提供制备本发明的抗CD47/抗PD-L1双特异性抗体或抗PD-L1抗体的方法,包括在所述宿主细胞中表达抗体以及从宿主细胞中分离所述抗体的步骤。
本发明的另一方面提供一种药物组合物,其包含本发明的抗CD47/抗PD-L1双特异性抗体和药学可接受的载体。在一些实施方案中,本发明提供药物组合物,其包含本发明的抗CD47/抗PD-L1双特异性抗体,还包含其他活性组分,如其他抗体、靶向药物等。在一些实施方案中,所述药学可接受的载体选自抗氧化剂、多肽、蛋白质、亲水性聚合物、氨基酸、糖、螯合剂、糖醇、离子和表面活性剂。在一个具体的实施方案中,所述药学可接受的载体为缓冲水溶液。在另一个具体的实施方案中,所述药学可接受的载体为脂质体的形式。
本发明的另一方面提供一种嵌合抗原受体(CAR)融合蛋白,其包含本发明的抗CD47抗体或其抗原结合片段和/或抗PD-L1抗体或其抗原结合片段。在一些实施方案中,所述嵌合抗原受体融合蛋白包含本发明的抗CD47抗体或其抗原结合片段,其为针对CD47抗原的VH和VL的单链可变片段(scFv)。在另一些实施方案中,所述嵌合抗原受体融合蛋白包含本发明的抗PD-L1抗体或其抗原结合片段,其为针对PD-L1抗原的VH和VL的单链可变片段(scFv)。在另一些实施方案中,所述嵌合抗原受体融合蛋白包含针对CD47抗原的VH和VL的第一单链可变片段(scFv)和针对PD-L1抗原的VH和VL的第二单链可变片段(scFv)。所述针对CD47抗原的VH和VL的第一scFv具有以上实施方案中描述的第一重链可变区的H1CDR1、H1CDR2和H1CDR3和第一轻链可变区的L1CDR1、L1CDR2和L1CDR3。所述针对PD-L1抗原的VH和VL的第二scFv具有以上实施方案中描述的第二重链可变区的H2CDR1、H2CDR2和H2CDR3和第二轻链可变区的L2CDR1、L2CDR2和L2CDR3。
可以将本发明的抗CD47/抗PD-L1双特异性抗体与药学上可接受的载体、稀释剂或赋形剂混合制备成药物制剂,以适合于经口或胃肠外给药。给药方法包括,但不限于经口、皮内、肌内、腹膜内、静脉内、脑内、眼内、气管内、皮下、鼻内途径。所述制剂可以通过任何途径施用,例如通过输注或推注,通过经上皮或皮肤粘膜(例如口腔粘膜或直肠等)吸收的途径施用。给药可以是全身的或局部的。所述制剂可通过本领域已知的方法制备,且包含药物制剂领域常规使用的载体、稀释剂或赋形剂。
本发明的另一方面提供治疗和/或预防与CD47、PD-L1或两者相关的疾病的方法,所述方法包括向有此需要的个体施用本发明的抗CD47/抗PD-L1双特异性抗体或本发明的药物组合物。
本发明的另一方面提供本发明的抗CD47/抗PD-L1双特异性抗体或抗PD-L1抗体或本发明的药物组合物在制备治疗和/或预防与CD47、PD-L1或两者相关的疾病的药物中的应用。在一些实施方案中,所述与CD47、PD-L1或两者相关的疾病包括血液肿瘤、淋巴瘤、乳腺癌、肺癌、胃癌、肠癌、食管癌、卵巢癌、宫颈癌、肾癌、膀胱癌、胰腺癌、神经胶质瘤和/或黑素瘤。所述肿瘤可以是任何表达PD-L1蛋白的肿瘤,例如膀胱癌、肝癌、结肠癌、直肠癌、子宫内膜癌、白血病、淋巴瘤、胰腺癌、肺癌(例如小细胞肺癌、非小细胞肺癌等)、乳腺癌、尿道癌、头颈癌、胃肠癌、胃癌、食道癌、卵巢癌、肾癌、黑素瘤、前列腺癌、甲状腺癌等。所述肿瘤可以是原发性或转移性肿瘤。在一些实施方案中,本发明提供上述抗CD47/抗PD-L1双特异性抗体或本发明的药物组合物在制备抗肿瘤的药物中的应用,例如所述肿瘤选自血液肿瘤、淋巴瘤、乳腺癌、肺癌、胃癌、肠癌、食管癌、卵巢癌、宫颈癌、肾癌、膀胱癌、胰腺癌、神经胶质瘤和黑素瘤。
本发明提供的抗CD47/抗PD-L1双特异性抗体具有显著的抗肿瘤作用,可明显抑制肿瘤生长,且不具有明显的红细胞毒性,人源化后的抗体免疫原性大大降低,有效消除人体免疫系统对外源性单抗的排异反应,可在制备用于治疗各类肿瘤疾病的药物中应用,具有广阔的市场前景。
定义
除非另有定义,本文中使用的科学和技术术语的含义是本领域技术人员所通常理解的含义。本文中所述的细胞和组织培养、分子生物学以及蛋白质和寡或多核苷酸化学及杂交中使用的命名和技术是本领域公知且普遍使用的。对于重组DNA、寡核苷酸合成和组织培养与转化(如电穿孔、脂质转染),使用了标准技术。酶促反应和纯化技术根据生产商的说明书或本领域普遍使用或本文所述的方法进行。前述技术和方法通常根据本领域公知且本说明书中引用和讨论的多部综合和较具体的文献中描述的那样使用。参见例如Sambrook等,Molecular Cloning:A Laboratory Manual)(第2版,Cold Spring Harbor LaboratoryPress,纽约冷泉港(1989))。本文所述的分析化学、合成有机化学以及医学和药学化学中使用的命名以及实验室方法和技术是本领域公知且普遍使用的。
在本发明中,术语“至少80%序列同一性”是指至少80%,81%,82%,83%,84%,85%,86%,87%,88%,89%,90%,91%,92%,93%,94%,95%,96%,97%,98%,99%,100%的序列同一性。在本发明中,术语“至少85%序列同一性”是指至少85%,86%,87%,88%,89%,90%,91%,92%,93%,94%,95%,96%,97%,98%,99%,100%的序列同一性。在一些优选的实施方案中,本发明所述的序列同一性可以至少为90%,91%,92%,93%,94%,95%,96%,97%,98%,99%,100%。两个序列之间的序列比较和同一性百分比测定可以通过National Center For Biotechnology Instutute网站上的BLASTN/BLASTP算法来进行。
在抗体分子中,轻链的三个高变区和重链的三个高变区在三维空间中以相对彼此的位置排列以形成抗原结合表面。抗原结合表面与所结合抗原的三维表面互补,且每条重链和轻链的三个高变区均被称作“互补决定区”或“CDR”。氨基酸向每个结构域的分配是根据Kabat《免疫学感兴趣的蛋白质的序列》(国立卫生研究院,马里兰州贝塞斯达(1987和1991))或Chothia和Lesk,J.Mol.Biol.196:901-917(1987),Chothia等,Nature 342:878-883(1989)定义。
本发明的“抗体”是指特异性地识别并结合抗原的多肽或多肽复合物。抗体可以是完整抗体和其任何抗原结合片段或单链。本发明的“抗体”包括含有Ig分子的具有结合抗原的生物活性的至少一部分的任何蛋白质或肽。本发明“抗体”的实例包括但不限于重链或轻链的CDR或其配体结合部分、重链或轻链可变区、重链或轻链恒定区、框架区或其任何部分。
本发明所述的“抗原结合片段”包括具有抗原结合活性的Fab片段、Fab’片段、F(ab’)2片段及与人CD47或PD-L1结合的Fv片段、scFv片段。Fv片段含有抗体第一重链可变区和第一轻链可变区,但没有恒定区,并具有全部抗原结合位点的最小抗体片段。一般地,Fv抗体还包含在VH和VL结构域之间的多肽接头,且能够形成抗原结合所需的结构。也可以用不同的连接物将两个抗体可变区连接成一条多肽链,称为单链抗体或单链Fv(scFv)。本发明的抗CD47或抗PD-L1抗体可以是单链可变区片段(scFv),其源自抗体的单链多肽,保留了结合抗原的能力。scFv的实例包括通过重组DNA技术形成的抗体多肽,其中免疫球蛋白重链(H链)和轻链(L链)片段的Fv区经由间隔序列连接。制备scFv的各种方法是本领域技术人员所熟知的。
本发明所述的抗体指免疫球蛋白分子或其免疫活性部分,即包含特异性结合抗原(与其免疫反应)的抗原结合位点的分子。“特异性结合”指抗体与抗原的一种或多种抗原决定簇反应而不与其他多肽反应或以很低的亲和性(Kd>10-6)结合其他多肽。抗体包括但不限于多克隆、单克隆、嵌合、dAb(结构域抗体)、单链、Fab、Fab’和F(ab’)2片段、Fv、scFv及Fab表达文库。单克隆抗体(mAb)是由单一的克隆细胞株得到的抗体,所述的细胞株不限于真核的、原核的或噬菌体的克隆细胞株。单克隆抗体或抗原结合片段可以用如杂交瘤技术、重组技术、噬菌体展示技术及合成技术如CDR grafting或其它现有技术进行重组得到。
本发明所述的“鼠源抗体”为根据本领域知识和技能制备的对人CD47的单克隆抗体。制备时用CD47抗原注射试验对象,然后分离表达具有所需序列或功能特性的抗体的杂交瘤。
本发明所述的“嵌合抗体”是将鼠源性抗体的可变区与人抗体的恒定区融合而成的抗体,可以减轻鼠源性抗体诱发的免疫应答反应。建立嵌合抗体,要先建立分泌鼠源性特异性单抗的杂交瘤,然后从小鼠杂交瘤细胞中克隆可变区基因,再根据需要克隆人抗体的恒定区基因,将小鼠可变区基因与人恒定区基因连接成嵌合基因后插入人载体中,最后在真核工业系统或原核工业系统中表达嵌合抗体分子。
本发明所述的“人源化抗体”也称为CDR移植抗体,是将小鼠的CDR序列移植到人的抗体可变区框架(FR)中产生的抗体。此类可变区框架序列可以从公共的DNA数据库或公开的参考文献获得,例如从ImMunoGeneTics(IMGT)网站http://imgt.cines.fr得到或从免疫球蛋白杂志,2001ISBN012441351上获得。
本发明所述的“双特异性抗体”指对至少两种不同抗原具有结合特异性的单克隆抗体。
本发明所述的“肽接头”可以是包括1至10,特别是2至50个任何氨基酸的那些,并且可以包括任何种类的氨基酸而没有任何限制。
附图说明
图1是抗CD47人源化抗体与猴CD47结合活性测定(ELISA)结果。
图2是抗CD47人源化抗体与人CD47结合活性测定(ELISA)结果。
图3是抗CD47人源化抗体与细胞表面CD47结合活性测定(ELISA)结果。
图4是红细胞凝集实验结果,其中RBC:阳性对照;PBS:空白对照。
图5是FACS检测抗CD47人源化抗体阻断活性实验结果。
图6是抗CD47人源化抗体Hu34-39-PE人胃癌NUGC-4移植瘤模型抗肿瘤试验结果。
图7是抗CD47人源化抗体Hu26T-31-PE人胃癌NUGC-4移植瘤模型抗肿瘤试验结果。
图8是双抗ScFab(HuPL7-21Ks/Hu34-39Hs)的结构示意图。
图9是ScFabHuPL7-21Ks序列示意图。
图10是ScFabHu34-39Hs序列示意图。
图11是双抗ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)与PD-L1结合(A)、与PD-1竞争(B)、与CD47结合(C)、与SIRPα竞争(D)以及与CD80竞争(E)实验结果。
图12是在细胞水平双抗ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)与细胞表面PD-L1结合(A)、与细胞表面CD47结合(B)以及阻断PD-1与PD-L1结合(C)、阻断SIRPα与CD47结合(D)的实验结果。
图13是双抗ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)在Raji-hPD-L1细胞上的CD47/PD-L1双结合(A、B)及CD47/PD-L1双阻断(B)实验结果。
图14是双抗ScFab(HuPL7-21Ks/Hu34-39Hs)对小鼠体内移植瘤生长抑制实验结果。
具体实施方式
下面代表性的实施例是为了更好地说明本发明,而非用于限制本发明的保护范围。以下实施例中未注明条件的实验方法通常按照常规条件,如冷泉港的抗体技术实验手册、分子克隆手册等,或按照原料或商品制造厂商所建议的条件进行。实施例中使用的材料、试剂如无特殊说明均为商购获得。
实施例1 CD47抗原蛋白及抗CD47阳性对照抗体的制备
1、抗原蛋白及阳性对照抗体的表达载体构建
(1)抗原蛋白的表达载体构建
合成编码CD47蛋白全长的基因片段,氨基酸序列设计如SEQ ID NO:41所示,然后克隆到真核表达质粒pTargeT上,获得其表达质粒pTargeT-CD47。
融合人源CD47蛋白胞外区氨基酸序列与hIgG1-Fc或his标签氨基酸序列,氨基酸序列设计分别如SEQ ID NO:42和SEQ ID NO:43所示。对上述氨基酸序列进行密码子优化后合成带有标签的CD47蛋白胞外区基因片段CD47-hFc、CD47-his,并将其分别克隆至真核表达质粒pHR中,获得其表达质粒pHR-CD47-hFc、pHR-CD47-his。
融合人源CD47蛋白胞外区氨基酸序列与mIgG1-Fc氨基酸序列,氨基酸序列设计如SEQ ID NO:44所示。对该氨基酸序列进行密码子优化后合成完整的表达质粒pcDNA3.1(+)-TPA-CD47-mIgG1-Fc。
SIRPα的序列如SEQ ID NO:45所示,对所述序列进行密码子优化后合成完整的表达质粒pcDNA3.1(+)-SIRPα-myc-His。
(2)阳性对照抗体的表达载体构建
使用专利申请WO2013/119714中公开的抗体AB6.12-IgG4P(本文简称AB06.12-4P)作为阳性对照抗体,AB06.12-4P的氨基酸序列如下所示:
AB06.12-4P重链氨基酸序列:SEQ ID NO:46;
AB06.12-4P轻链氨基酸序列:SEQ ID NO:47。
对上述抗体序列所对应的氨基酸序列进行密码子人工优化,获得阳性对照抗体AB06.12-4P的重链及轻链表达质粒pcDNA3.1(+)-SHC025-hG4、pcDNA3.1(+)-SHC025-hk。并将其重链基因片段克隆到含有IgG4轻链恒定区的真核表达质粒pHR上,获得AB06.12-4P的重链真核表达质粒pHR-SHC025-hG4-4PE,其轻链表达质粒为pcDNA3.1(+)-SHC025-hk。
2、抗原蛋白及阳性对照抗体的表达与纯化
(1)抗原蛋白的稳转细胞株的构建
将真核表达质粒pTargeT-CD47在160V电压,15msec的方形脉冲下以电转的方式转染到CHO-K1细胞(中国科学院上海细胞生物学研究所),置37℃,5%CO2的培养箱中培养。24h后采用含500ug/ml G418的培养基加压培养。16天后采用FACS检测pool阳性率,将电转质粒后的细胞铺板(1x106个/ml的细胞密度,100ul/孔),采用PE mouse anti-human CD47抗体(BD,556046)与细胞孵育,以流式细胞仪(BD,FACSJazz)读取585nm波长下mean值,使用GraphPad进行数据分析。将阳性细胞株进行亚克隆,挑选出克隆化的CHO-K1细胞株,该细胞株高水平表达CD47分子,命名为CHO-K1-E5。
(2)标签抗原蛋白及阳性对照抗体的表达
在1L细胞培养瓶中接种密度为0.5x 106个细胞/ml的293F细胞,加入新鲜的预热的FreeStyle 293表达培养基,使接种后总体积达到250mL,置37℃,8%CO2,加湿的CO2培养箱中培养过夜。取8.5mL FreeStyle 293表达培养基,加入1mg/ml的PEI溶液500ul,混合均匀,取250ug待转染质粒加入8.5ml FreeStyle293表达培养基中,混合均匀,其中标签抗原蛋白质粒pHR-CD47-hFc、pHR-CD47-his、pcDNA3.1(+)-TPA-CD47-mIgG1-Fc、pcDNA3.1(+)-SIRPα-myc-His分别转染;阳性对照抗体AB06.12-4P重链质粒pHR-SHC025-hG4-4PE和轻链质粒pcDNA3.1(+)-SHC025-hk共同转染。将PEI与FreeStyle 293表达培养基的混合溶液加入到质粒中,混合均匀,然后加入细胞培养物中,置37℃,8%CO2,加湿的CO2培养箱中培养。在细胞转染后第1天和第3天对细胞进行补料,每瓶加入2.5ml的谷氨酰胺(母液浓度为200mM)和5ml的葡萄糖(母液浓度为180g/L)。当细胞细胞活力降至65%~75%时,收集细胞上清。将细胞培养物1500rpm离心5min,收集上清,再8000rpm离心20min,收集上清。
(3)亲和层析柱纯化
利用AKTA(GE,AKTA pure-150)根据蛋白性质采用不同的亲和层析柱进行纯化(不同蛋白适配的亲和层析柱见表1),具体纯化步骤如下:
表1不同蛋白适配的亲和层析柱
清洗:超纯水清洗设备及管路2min,流速10mL/min,后用0.1M NaOH清洗层析系统;
接柱:将层析柱接入层析设备,并用超纯水冲洗5min;后0.1M NaOH冲洗30min,保留时间5min;
平衡:20mM PB+0.15M NaCl,pH 7.2平衡5个CV(柱体积);
上样:将细胞表达上清上样,保留时间5min;
后平衡:20mM PB+0.15M NaCl,pH 7.2平衡5个CV;
洗脱:50mM醋酸,pH=3.4洗脱,保留时间5min。UV280至50mAu左右时开始收集,降至50mAu左右时停止收集。用1M Tris-HCl,pH 9.0将样品pH调节至7.0;
再平衡:20mM PB+0.15M NaCl,pH 7.2平衡3个CV,保留时间5min;
在线清洗:0.1M NaOH清洗30min,保留时间5min;
清洗保存:纯化水清洗10min,后20%乙醇2个CV。
实施例2抗CD47单克隆抗体的制备
1、杂交瘤单克隆的制备
(1)动物免疫
采用不同标签的抗CD47抗原蛋白与佐剂共同免疫的方法免疫SJL品系的实验小鼠,首次抗原使用50ug抗原,后期使用25ug抗原免疫。
免疫佐剂可以是Quick Antibody-Mouse5W(北京博奥龙免疫技术有限公司)或Titer Max(Sigma)与CpG(金斯瑞生物科技有限合成)/Alum(thermo)佐剂间隔。将不同标签的CD47抗原蛋白样品逐滴加入到佐剂溶液中,边滴加边涡旋以充分混合,佐剂使用剂量参考说明书进行。混合均匀形成油包水的乳状后免疫SJL小鼠。
高水平表达CD47分子的细胞系如CCRF-CEM和CHO-K1-E5也用来免疫小鼠,使之产生抗体。用胰蛋白酶消化处理正在培养的人急性淋巴白血病细胞(CCRF-CEM)和实施例1中获得的CHO-K1-E5阳性单细胞,1000rpm离心5min,弃上清,用PBS重悬细胞沉淀,取样用细胞计数仪计数,剩余样品1000rpm离心5min,弃上清,用PBS重悬细胞沉淀,计入适量的PBS以获得1x108个细胞/ml的细胞悬液。实验组小鼠每只免疫1x107个细胞。
免疫方案如表2所示:
表2小鼠免疫方案
*i.m.肌内注射;s.c.皮下注射;i.p.腹腔注射。
(2)杂交瘤融合
脾细胞的获取和制备:将加强免疫后的小鼠处死后浸泡75%的酒精中。解剖取出脾脏,用研磨棒研磨后,经细胞筛网过滤后制备成单细胞悬液。将脾细胞悬液2000rpm离心5min,弃上清。加入2mL红细胞裂解液,室温裂解红细胞2min,加入PBS至20mL,1500rpm离心7min,弃上清,重悬后进行活细胞计数。收集培养瓶中的Sp2/0细胞,1000rpm离心5min后弃上清,重悬后进行活细胞计数。按脾细胞:Sp2/0细胞=1:1的比例混合细胞,1500rpm离心7min后弃上清。用20mL电转缓冲液重悬细胞,1500rpm离心7min。弃上清,重复一次。分别用适量电转缓冲液重悬细胞,保证细胞浓度2×107个细胞/mL左右。把细胞悬液加入9mL电转融合槽中融合。融合后将细胞悬液转入到含有20%FBS的15mL RPMI 1640完全培养基中,室温放置20min。用含1×HAT、1×BIOMYC3、20%FBS的RPMI 1640培养基重悬融合细胞。按100μl/孔将细胞悬液加到若干块96孔细胞培养板中,保证每孔细胞量约为4×104个细胞/孔,置于37℃细胞培养箱中培养。5天后补加100μL/孔RPMI 1640完全培养基(含20%FBS,1×HAT,1×BIOMYC-3)。
(3)杂交瘤及亚克隆上清的筛选
融合一周后,取细胞上清,通过ELISA筛选出能结合CD47-his蛋白或细胞表面CD47的杂交瘤上清,利用CD47-his筛选针对CD47而非hFc、mFc的抗体。然后利用ELISA分析杂交瘤上清阻断CD47-SIRPα相互作用的能力。包被SIRPα-myc-his于酶标板上,加入重组人源蛋白CD47-hFc与杂交瘤上清的混合物孵育2h,加入HRP标记的anti human IgG Fc特异性抗体(Jackson Immuno Research)孵育1h,利用酶标仪检测450nm处的吸光值。将筛选获得的具有结合能力及阻断能力的杂交瘤母克隆扩大培养,进行结合活性及阻断活性的复测,再次筛选获得具有结合及阻断能力的杂交瘤阳性克隆。
利用有限稀释法将阳性细胞株进行亚克隆,培养一周后利用ELISA检测亚克隆上清与CD47分子的结合活性以及阻断CD47-SIRPα相互作用的活性,获得3种双阳性细胞株,分别标记为SHC025-26、SHC025-34、SHC025-58。
2、亚型的鉴定
参照鼠抗体亚型鉴定试剂盒SBA Clonotyping Systerm-C57BL/6-HRP(SouthernBiotech,货号:5300-05B)说明书对抗体进行亚型鉴定,结果如表3所示:
表3抗体亚型鉴定结果
命名 | 抗体亚型 |
SHC025-26 | IgG1/k |
SHC025-34 | IgG2c/k |
SHC025-58 | IgG2b/k |
3、单克隆抗体的制备
根据亚克隆上清活性分析结果确定单克隆抗体母克隆株SHC025-26、SHC025-34、SHC025-58,将其扩大培养。培养条件是含有10%胎牛血清、1x NAEE、1x丙酮酸钠、1%青链霉素双抗的1640培养基,待细胞汇合度大于>80%时,进将细胞传代扩培,待培养至约50ml时收集上清,纯化抗体。获得抗体经SDS-PAGE凝胶电泳确定纯度良好。
4、单克隆抗体测序
将经亚克隆操作的阳性杂交瘤细胞进行扩大培养,取适量细胞按RNeasy PlusMini Kit(Qiagen,74134)试剂盒说明书提取总RNA,利用Prime Script 1st strand cDNASynthesis Kit(Takara,6110A)反转录试剂盒合成cDNA第一条链。
根据小鼠抗体亚型可变区设计特异性引物(5’端含有用于与真核表达载体发生同源重组的同源臂序列),以cDNA为模板进行抗体可变区基因的PCR扩增,从而分别获得小鼠抗体轻链与重链可变区的基因片段;设计引物(参考文献:1.Anke Krebber,SusanneBornhauser,Jorg Burmester etal.Reliable cloning of functional antibodyvariable domains from hybridomas and spleen cell repertoires employing areengineered phage display system.Journal of Immunological Methods,1997,201:35–55;2.Simon KorenMihaColja Venturini etal.Antibody variable-region sequencing as a method for hybridoma cell-line authentication,2008,78:1071–1078),进行DNA测序获得序列,测序结果见表4。
表4抗CD47鼠源单克隆抗体序列表
抗体 | 重链可变区氨基酸序列 | 轻链可变区氨基酸序列 |
SHC025-26 | SEQ ID NO:21 | SEQ ID NO:24 |
SHC025-34 | SEQ ID NO:22 | SEQ ID NO:25 |
SHC025-58 | SEQ ID NO:23 | SEQ ID NO:26 |
抗体SHC025-34的VH的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:4、5、6,VL的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:15、16、17。实施例3抗CD47嵌合抗体的构建
将纯化后(纯化步骤见实施例1)的小鼠抗体轻链与重链可变区基因片段分别与线性化的含有人抗体轻链或重链恒定区的真核表达质粒共转化大肠杆菌DH5α感受态细胞,将混合液均匀涂布于含有相应抗生素的琼脂平板表面,于37℃恒温培养箱过夜培养后分别挑取若干单菌落进行DNA测序;将测序正确的嵌合抗体分别标记为SHC025-26CHI、SHC025-34CHI、SHC025-58CHI。
将测序正确的阳性克隆接种于含有相应抗生素的2×YT液体培养基中,于37℃振荡培养12小时以上,然后收集菌体进行质粒提取,从而获得嵌合抗体轻链与重链表达质粒,使用核酸定量分析仪检测质粒的浓度与纯度。
将嵌合抗体转染HEK293E细胞,表达纯化获得大量抗体,进行纯度检测、活性分析及亲和力的检测。
测序发现,在SHC025-26的重链CDR第118位,以及SHC025-58的轻链CDR第56位各自含有一个半胱氨酸,CDR区域的半胱氨酸在表达时会与抗体分子上的其他半胱氨酸随机配对氧化形成二硫桥,从而极大的影响抗体纯度。为解决之一问题,对SHC025-26CHI、SHC025-58CHI氨基酸序列进行如下改造:将SHC025-26CHI重链之C118突变为T,标记为SHC025-26CHI-T;将SHC025-58CHI轻链之C56突变为A,标记为SHC025-58CHI-A,利用定点突变的方法构建突变基因。嵌合抗体测序结果见表5。
表5抗CD47嵌合抗体序列表
抗体SHC025-34CHI的VH的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:4、5、6,VL的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:15、16、17。
实施例4抗CD47人源化抗体的构建及生产
根据嵌合抗体的活性分析、亲和力KD值等结果选择SHC025-34CHI、SHC025-58CHI-A、SHC025-26CHI-T进行人源化抗体改造。
抗体的人源化改造,首先是通过与免疫基因数据库(IMGT)中的小鼠抗体序列进行比对,确认SHC025-34CHI、SHC025-58CHI-A、SHC025-26CHI-T抗体可变区的鼠源种系,经过同源比对,SHC025-34CHI、SHC025-58CHI-A、SHC025-26CHI-T抗体的重链可变区序列的FR区分别与人抗体胚系基因IGHV1-8*01、IGHV3-21*04以及IGHV1-2*02最为相似;抗体轻链可变区的FR序列则分别与人抗体胚系基因IGKV3-11*01、IGKV1-5*01以及IGKV4-1*01最为相似。以SHC025-34CHI/SHC025-58CHI-A抗体框架区序列FR1-FR3作为模板,在人框架区库中寻找3D结构相似但是免疫原性较低的全人框架替代SHC025-34CHI/SHC025-58CHI-A的FR1-FR3序列,重链/轻链全长序列进行3D建模并和原抗体重链/轻链序列进行结构比对分析,综合考虑抗原性和3D结构相似度,最终选择SHC025-34CHI的6条人源化重链可变区(参见SEQ IDNO:48、49、50、51、52、53)和4条人源化轻链可变区(参见SEQ ID NO:54、55、56、57)及SHC025-58CHI-A的6条人源化重链可变区(参见SEQ ID NO:58、59、60、61、62、63)和5条人源化轻链可变区(参见SEQ ID NO:64、65、66、67、68)进行下一步优化。SHC025-34CHI/SHC025-58CHI-A人源化抗体非CDR区序列均达到95%以上人源化。用SHC025-26CHI-T重轻链的可变区序列,在Protein Data Bank中进行结构比对分析,选择最相近的FR1-FR3序列替换掉鼠源序列,并将在结构模拟中显示对抗体结构稳定起到关键作用的的氨基酸位点回突变为鼠源性氨基酸残基。最终获得SHC025-26CHI-T的4条人源化重链可变区(参见SEQ ID NO:69、70、71、72)和2条人源化轻链可变区(参见SEQ ID NO:73、74)。
将以上设计好的人源化抗体轻链与重链可变区氨基酸序列反转录成相对应的核苷酸序列,并生成相邻片段之间含有互补序列的寡核苷酸片段,通过Overlap PCR将寡核苷酸片段退火后连接起来,再利用特异性引物(5’端含有用于与真核表达载体发生同源重组的同源臂序列)扩增出完整的轻链与重链可变区核苷酸片段;将纯化后的轻链可变区核苷酸片段与线性化的含有IgG4轻链恒定区的真核表达质粒共转化大肠杆菌DH5α感受态细胞,将纯化后的重链可变区核苷酸片段与含S228P/L235E突变的IgG4重链恒定区的真核表达质粒共转化大肠杆菌DH5α感受态细胞,分别将转化质粒的感受态细胞均匀涂布于含有相应抗生素的琼脂平板表面,于37℃恒温培养箱过夜培养后分别挑取若干单菌落进行DNA测序。
将测序正确的阳性克隆接种于含有相应抗生素的2×YT液体培养基中,于37℃振荡培养12小时以上,然后收集菌体进行质粒提取,从而获得人源化抗体轻链与重链表达质粒,使用核酸定量分析仪检测质粒的浓度与纯度。
将质粒转染HEK293E细胞,表达纯化获得大量抗体,进行纯度检测、活性分析及亲和力的检测。
挑选纯度、活性和亲和力均较好的人源化抗体,标记为Hu26T-31-PE、Hu34-39-PE、Hu58A-14-PE,序列见表6。人源化抗体来源见表7。
表6抗CD47人源化抗体序列表
抗体Hu34-39-PE的VH的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:4、5、6,VL的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:15、16、17。
表7人源化序列设计信息
实施例5抗CD47抗体与猴CD47结合活性测定(ELISA)
采用protein based Elisa分析抗体的结合活性。食蟹猴CD47-His(0.1μg/孔,ACRO Biosystems,Cat.No.CD7-C52H1-50ug)包被96孔酶标板。本发明提供的抗CD47抗体作为一抗从2μg/mL开始,5倍梯度稀释加入酶标板,共8个浓度,浓度分别为2000ng/mL、400ng/mL、80ng/mL、16ng/mL、3.2ng/mL、0.64ng/mL、0.128ng/mL、0ng/mL,37℃孵育1.5h,阳性对照抗体为AB06.12-4P。二抗使用Anti-Human IgG HRP(Jackson,109-035-003,1:10000),加入显色液TMB(3,3',5,5'-四甲基联苯胺),终止后利用酶标仪(thermo,Multiskan FC)读取OD450值。使用GraphPad生成EC50,结果如图1所示。
实验结果显示本发明提供的人源化抗CD47抗体Hu26T-31-PE、Hu34-39-PE、Hu58A-14-PE均具有与食蟹猴CD47结合的能力,且结合能力与阳性对照抗体AB06.12-4P相当。
实施例6抗CD47抗体与人CD47结合活性测定(ELISA)
采用ELISA分析抗体的结合活性。将人CD47-His蛋白(0.1ug/孔,实施例1、2中制得)包被到96孔酶标板,37℃孵育2h。用1xPBST清洗3次后用5%的脱脂牛奶4℃封闭过夜。用1xPBST清洗3次后,本发明提供的抗CD47抗体作为一抗从2μg/mL开始,5倍梯度稀释加入酶标板,共8个浓度,浓度分别为2000ng/mL、400ng/mL、80ng/mL、16ng/mL、3.2ng/mL、0.64ng/mL、0.128ng/mL、0ng/mL,37℃孵育1.5h,阳性对照抗体为AB06.12-4P;用1xPBST清洗5次后,二抗使用Anti-Human IgG HRP(Jackson,109-035-003,1:10000),37℃孵育40min。用1xPBST清洗5次后,加入显色液TMB,终止后利用酶标仪(thermo,Multiskan FC)读取OD450值。使用GraphPad生成EC50,结果如图2所示。
实验结果显示本发明提供的人源化抗CD47抗体Hu26T-31-PE、Hu34-39-PE、Hu58A-14-PE均具有与人CD47结合的能力,且结合能力与阳性对照抗体AB06.12-4P相当。
实施例7抗CD47抗体与细胞表面CD47结合的测定(ELISA)
采用Cell based Elisa分析抗体的结合活性。CHO-K1-E5细胞以每孔1x105个细胞的方式铺细胞板,置于37℃,5%CO2的条件下过夜培养;第二天用4%的多聚甲醛固定后用脱脂牛奶封闭1h;用1xPBS轻柔清洗细胞板;本发明提供的抗CD47抗体作为一抗从2μg/mL开始,5倍梯度稀释加入细胞板,共8个浓度,浓度分别为2000ng/mL、400ng/mL、80ng/mL、16ng/mL、3.2ng/mL、0.64ng/mL、0.128ng/mL、0ng/mL,37℃孵育1.5h,阳性对照抗体为AB06.12-4P;二抗使用Anti-Human IgG HRP(Jackson,109-035-003,1:10000),加入显色液TMB,终止后利用酶标仪(thermo,Multiskan FC)读取OD450值。使用GraphPad生成EC50,结果如图3所示。
实验结果显示,本发明提供的人源化抗CD47抗体Hu26T-31-PE、Hu34-39-PE、Hu58A-14-PE均可与细胞表面CD47结合,且结合能力与阳性对照抗体AB06.12-4P相当。
实施例8抗CD47抗体与人CD47蛋白的亲和力测定
利用Fortebio Octet对实施例1、2中制得的人源化抗CD47抗体结合抗原CD47(19-136)-hFC的亲和力进行测定。先将抗原CD47(19-136)-hFc生物素化标记,然后用10kD的超滤管,PBS离心超滤脱盐3-4次,Nanodrop测定生物素标记后抗原CD47-hFc-Biotin的实际浓度。将CD47-hFc-Biotin用SD缓冲液(0.02%Tween20+0.1%BSA溶液)稀释到浓度5ug/ml,所述人源化抗CD47抗体用SD缓冲液4倍浓度梯度稀释,使其浓度为10ug/ml、2.5ug/ml、0.625ug/ml、0ug/ml,选用SA传感器固化该抗原,按fortebio Octet RED96的操作规程进行亲和力测定,具体参数及实验结果如表8所示。
表8与人CD47蛋白的亲和力测定
实验结果显示,与阳性对照抗体相比,人源化抗CD47抗体Hu26T-31-PE与人CD47蛋白结合具有更高的亲和力。
实施例9抗CD47抗体的红细胞凝集实验
取5mL血液加入40mL PBS,2000rpm轻柔离心5min,弃上清,用PBS洗涤三次,然后用PBS重悬红细胞,按红细胞积压,配制2%的红细胞悬液。待分析抗体起始浓度为1-20uM之间,2倍梯度稀释,共24个浓度梯度。圆底96孔板中加入上述50μL不同浓度抗体,然后加入50ul上述2%的红细胞悬液,混匀,室温放置。2h后观察是否有凝集现象。兔多克隆抗体RBC抗体(Rockland,109-4139)作为红细胞凝集发生的阳性对照,结果如图4所示。如图4所示,96孔板从左至右加入的抗体(兔多克隆抗体RBC抗体、AB06.12-4P抗体及本发明待测抗体)浓度从20uM起始2倍梯度依次稀释,其中RBC表示阳性对照组(使用兔多克隆抗体RBC抗体,显著引起红细胞凝集),PBS表示空白对照组。孔中红细胞小圆点状,边缘整齐表示不引起细胞凝集;边缘略不整齐表示少量红细胞凝集;片状,布满孔底表示大部分红细胞凝集。
经测定,专利申请WO2011/143624中公开的抗CD47抗体Hu5F9-G4在相同浓度范围内能引起显著的大部分红细胞凝集,此为抗CD47抗体的普遍不良现象。而在相同的条件下,如实验结果显示,本发明的Hu26T-31-PE、Hu34-39-PE、Hu58A-14-PE均不会引起红细胞凝集现象,本发明的抗体在此方面明显优于抗体Hu5F9-G4。
实施例10抗CD47抗体对CD47阻断活性的测定
采用FACS检测本发明提供的抗CD47抗体阻断SIRPa结合到细胞表面CD47的能力。
CHO-K1-E5阳性细胞株作为CD47提供者,在梯度稀释的抗CD47抗体存在的情况下,观察CD47与SIRPa的结合能力。二抗使用PE Streptavidin(Biolegend,405203,1:200)来监测SIRPa-Biotin的变化。AB06.12-4P作为阻断SIRPa结合到细胞表面CD47的阳性对照。流式细胞仪(BD,FACSJazz)读取585nm波长下mean值,使用GraphPad生成IC50,结果如图5所示。
实验结果显示,阻断活性依次排序为Hu26T-31-PE≧Hu34-39-PE≧AB06.12-P﹥Hu58A-14-PE。
实施例11抗CD47抗体在人胃癌NUGC-4移植瘤模型中抗肿瘤试验
1、实验材料
(1)实验细胞及动物
NUGC-4人胃癌细胞购自美国典型培养物保藏中心(ATCC);
NOD-Scid小鼠,雌性,5-8周龄,体重18-20克,购自上海灵畅生物科技有限公司;
(2)供试品及对照品
对照品Isotype IgG4(货号AB170091)购自中美冠科生物技术有限公司,用作阴性对照品;
试验前,将本发明的人源化抗CD47抗体用PBS配制为0.6mg/mL和0.3mg/mL两个浓度,Isotype IgG4和AB 06.12-4P配制为0.6mg/mL。
(3)实验方法
用含有10%胎牛血清,100U/mL的青霉素和100μg/mL的链霉素的RMPI1640培养基在37℃、5%CO2的培养箱中培养NUGC-4人胃癌细胞。一周一次用2mL 1×EDTA溶液消化处理传代。当细胞饱和度为80%-90%时,收取细胞,计数,接种。将含有5×106细胞PBS同100uL的Matrigel混合(终体积200μL)接种于小鼠的右后边,接种细胞数目为5×106/只。待肿瘤生长至体积达150-200mm3时开始分组,腹腔给药每周3次,每周三次用游标卡尺测量肿瘤直径,计算肿瘤体积,肿瘤体积的计算公式为:V=0.5a×b2,a和b分别表示肿瘤的长径和短径。抗体的抑瘤疗效用相对肿瘤增殖率T/C(%)评价。相对肿瘤增殖率T/C(%):计算公式如下:T/C%=TRTV/CRTV×100%(TRTV:治疗组RTV;CRTV:阴性对照组RTV)。RTV=V21/V0,其中V0是分组给药时(即d0)测量所得肿瘤体积,V21为给药21天测量时的肿瘤体积。将给药组与溶媒组最后一天(day21)瘤体积用T-test进行分析,用GraphPad Prism进行。结果如表9所示。
表9人胃癌NUGC-4移植瘤模型抗肿瘤试验结果
***p<0.001 vs.Isotype IgG4;**p<0.005 vs.Isotype IgG4
实验结果显示,本发明提供的抗体在人胃癌NUGC-4细胞接种NOD-SCID小鼠移植瘤模型中具有较显著的抗肿瘤作用。3mg/kg剂量的Hu26T-31-PE和Hu34-39-PE与6mg/kg的参照抗体AB06.12-4P抑瘤作用相当,而6mg/kg剂量Hu26T-31-PE和Hu34-39-PE抑瘤作用优于6mg/kg参照抗体AB06.12-4P。停药一周后,6mg/kg的参照抗体组出现肿瘤复发现象,而Hu26T-31-PE和Hu34-39-PE组无复发现象(图6、图7)。提示本发明提供的抗CD47抗体出乎意料的具有更加显著抑制肿瘤生长的作用。
实施例12抗人PD-L1抗体的获得
1.动物免疫
采用mFc标签的PD-L1抗原蛋白(购于北京百普赛斯生物科技有限公司)与佐剂共同免疫的方法免疫BALB/c、SJL品系的实验小鼠和SD品系的实验大鼠。
免疫佐剂首次是Freund’s Adjuvant,Complete(SIGMA,F5881-10ML),后期用Freund’s Adjuvant,Incomplete(SIGMA,F5506-10ML)。将不同标签的PD-L1抗原蛋白样品逐滴加入到佐剂溶液中,边滴加边涡旋以充分混合,佐剂使用剂量参考说明书进行。混合均匀形成油包水的乳状后免疫小鼠或大鼠。免疫方案如表10所示:
表10免疫方案
*i.m.肌内注射
2.细胞融合
无菌取小鼠脾脏并制成细胞悬液,按脾细胞:Sp2/0细胞=1:1的比例进行细胞融合。将融合后的细胞悬液转入到含有20%FBS的15mL RPMI 1640完全培养基中,室温放置20min。用含1×HAT、1×BIOMYC3、20%FBS的RPMI 1640培养基重悬融合细胞。按100μl/孔将细胞悬液加到若干块96孔细胞培养板中,保证每孔细胞量约为4×104个细胞/孔,置于37℃细胞培养箱中培养。5天后补加100μL/孔RPMI 1640完全培养基(含20%FBS,1×HAT,1×BIOMYC-3)。
3.阳性克隆筛选
融合一周后,取细胞上清,通过ELISA筛选出具有结合及阻断能力的杂交瘤母克隆细胞并进行扩大培养,复测结合活性及阻断活性,再次筛选获得具有结合及阻断能力的杂交瘤阳性细胞株。利用有限稀释法将阳性细胞株进行亚克隆,培养一周后用ELISA检测亚克隆上清与PD-L1分子的结合活性以及阻断PD-L1/PD-1相互作用的活性,获得PL-7、PL-15、PL-16、PL-18四株优选双阳性细胞株。
4.抗PD-L1抗体可变区序列的获得
将经亚克隆操作的阳性杂交瘤细胞进行扩大培养,取适量细胞按RNeasy PlusMini Kit(Qiagen,74134)试剂盒说明书提取总RNA,利用Prime Script 1st strand cDNASynthesis Kit(Takara,6110A)反转录试剂盒合成cDNA第一条链。
根据小鼠抗体亚型可变区设计特异性引物(5’端含有用于与真核表达载体发生同源重组的同源臂序列),以cDNA为模板进行抗体可变区基因的PCR扩增,从而分别获得小鼠抗体轻链与重链可变区的基因片段,命名为SHS009PL-7、SHS009PL-15、SHS009PL-16、SHS009PL-18;设计引物(参考文献:1.Anke Krebber,Susanne Bornhauser,JorgBurmester etal.Reliable cloning of functional antibody variable domains fromhybridomas and spleen cell repertoires employing a reengineered phage displaysystem.Journal of Immunological Methods,1997,201:35–55;2.Simon KorenMihaColja Venturini etal.Antibody variable-region sequencing as amethod for hybridoma cell-line authentication,2008,78:1071–1078),进行DNA测序获得序列,测序结果见表11。
表11抗PD-L1鼠源单克隆抗体序列表
5.嵌合抗体的构建
将纯化后的小鼠抗体轻链与重链可变区基因片段分别与线性化的含有人抗体轻链或重链恒定区基因片段的真核表达质粒共转化大肠杆菌DH5α感受态细胞,挑取测序正确的嵌合抗体分别标记为PL-7CHI、PL-15CHI、PL-16CHI、PL-18CHI,嵌合抗体测序结果见表12。
PL-7CHI、PL-15CHI、PL-16CHI、PL-18CHI轻重链可变区氨基酸序列,分别同鼠源性抗体SHS009PL-7、SHS009PL-15、SHS009PL-16、SHS009PL-18轻重链可变区氨基酸序列一致。
提取嵌合抗体轻链质粒与重链质粒转染HEK 293F细胞,表达纯化获得大量抗体,进行纯度检测、活性分析及亲和力的检测。
表12抗PD-L1嵌合抗体序列表
嵌合抗体 | 重链可变区氨基酸序列 | 轻链可变区氨基酸序列 |
PL-7CHI | SEQ ID NO:99 | SEQ ID NO:103 |
PL-15CHI | SEQ ID NO:100 | SEQ ID NO:104 |
PL-16CHI | SEQ ID NO:101 | SEQ ID NO:105 |
PL-18CHI | SEQ ID NO:102 | SEQ ID NO:106 |
6.抗PD-L1抗体人源化改造
根据嵌合抗体的活性分析、亲和力KD值等结果选择PL-7CHI、PL-16CHI进行人源化抗体改造。
鼠源单克隆嵌合抗体PL-7CHI、PL-16CHI的人源化参照经典的CDR移植策略进行,以PL-7CHI、PL-16CHI抗体框架区序列FR1-FR3作为模板,在人框架区库中寻找3D结构相似但是免疫原性较低的全人框架替代PL-7CHI/PL-16CHI的FR1-FR3序列。经同源比对分析,PL-7CHI、PL-16CHI抗体重链可变区FR区分别与人抗体种系基因M99683|IGHV4-31*02(SEQID NO:107)、X62109|IGHV1-3*01(SEQ ID NO:108)最为相似,PL-7CHI、PL-16CHI抗体轻链可变区FR区与人抗体种系基因Z00023|IGKV4-1*01(SEQ ID NO:109)最为相似。人源化后的重链/轻链全长序列进行3D建模并和原抗体重链/轻链序列进行结构比对分析,综合考虑抗原性和3D结构相似度,并将在结构模拟中显示对抗体结构稳定起到关键作用的的氨基酸位点回突变为鼠源性氨基酸残基。最后得到PL-7CHI人源化重链5条(PL-7CHI人源化重链可变区序列:VH1-0(SEQ ID NO:110)、VH1-1(SEQ ID NO:111)、VH1-2(SEQ ID NO:112)、VH1-3(SEQ ID NO:113)或VH1-4(SEQ ID NO:114))、人源化轻链4条(PL-7CHI人源化轻链可变区序列:VL1-0(SEQ ID NO:115)、VL1-1(SEQ ID NO:116)、VL1-2(SEQ ID NO:117)或VL1-3(SEQ ID NO:118));PL-16CHI人源化重链5条(PL-16CHI人源化重链可变区序列:VH1-0(SEQID NO:119)、VH1-1(SEQ ID NO:120)、VH1-2(SEQ ID NO:121)、VH1-3(SEQ ID NO:122)或VH1-4(SEQ ID NO:123))、人源化轻链3条(PL-16CHI人源化轻链可变区序列:VL1-0(SEQ IDNO:124)、VL1-1(SEQ ID NO:125)或VL1-2(SEQ ID NO:126))。在此基础上,通过不同的轻重链组合,我们得到了多个人源化抗体。经活性检测后,确定其中评分最高的抗PD-L1人源化抗体序列分别为HuPL7-21、HuPL16-42。
实施例13人源化抗PD-L1抗体生产
将以上设计好的人源化抗体轻链与重链可变区氨基酸序列合成相对应的核苷酸编码序列,并生成相邻片段之间含有互补序列的寡核苷酸片段,通过Overlap PCR将寡核苷酸片段退火后连接起来,再利用特异性引物(5’端含有用于与真核表达载体发生同源重组的同源臂序列)扩增出完整的轻链与重链可变区核苷酸片段;将纯化后的轻链可变区核苷酸片段与线性化的含有IgG4轻链恒定区的真核表达质粒共转化大肠杆菌DH5α感受态细胞,将纯化后的重链可变区核苷酸片段与含S228P/L235E突变的IgG4重链恒定区的真核表达质粒共转化大肠杆菌DH5α感受态细胞,分别将转化质粒的感受态细胞均匀涂布于含有相应抗生素的琼脂平板表面,于37℃恒温培养箱过夜培养后分别挑取若干单菌落进行DNA测序。
将测序正确的阳性克隆进行质粒提取,从而获得人源化抗体轻链与重链表达质粒,使用核酸定量分析仪检测质粒的浓度与纯度。
将质粒转染HEK293 F细胞,表达纯化获得大量抗体,进行纯度检测、活性分析及亲和力的检测。序列见表13。
表13抗PD-L1人源化抗体序列表
抗体HuPL7-21的VH的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:75、76和77,VL的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:78、79和80。抗体HuPL16-42的VH的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:87、88和89,VL的CDR序列:CDR1、CDR2、CDR3的序列分别为SEQ ID NO:90、91和92。
实施例14抗CD47/PD-L1双特异性抗体的构建、表达及纯化
1.双特异性抗CD47/抗PD-L1抗体表达载体的构建
运用基因工程手段构建抗CD47/抗PD-L1的双特异性抗体,其结构形式如图8所示:该双特异性抗体是由两条分别抗PD-L1和抗CD47的抗体单链通过异源二聚化而形成;区别于天然IgG抗体,该双特异性抗体中抗PD-L1和抗CD47抗体的轻链都通过额外添加的柔性连接肽连接至抗体重链N端,该连接肽是含甘氨酸(G)和丝氨酸(S)残基的GGGGS重复序列,优选包含8个GGGGS的重复序列;此外,为促进异源二聚体的形成,在上述S228P/L235E突变的基础上,在抗PD-L1抗体单链的CH3 domain再增加S354C/T366W突变,在抗CD47抗体单链的CH3 domain再增加Y349C/T366S/L368A/Y407V突变。根据该结构形式,利用上述抗PD-L1抗体HuPL7-21(轻链可变区SEQ ID NO:116和恒定区CL SEQ ID NO:131)或HuPL16-42(轻链可变区SEQ ID NO:126和恒定区CL SEQ ID NO:131)序列,通过基因合成获得抗PD-L1的抗体单链的核苷酸片段,即ScFabHuPL7-21Ks或ScFabHuPL16-42Ks;利用将上述抗CD47抗体Hu34-39(轻链可变区SEQ ID NO:33和和恒定区CL SEQ ID NO:131)序列,通过基因合成获得抗CD47的抗体单链的核苷酸片段,即ScFabHu34-39Hs。将该ScFabHuPL7-21Ks(或ScFabHuPL16-42Ks)、ScFabHu34-39Hs核苷酸片段(上下游均含有适当长度的同源臂)分别与线性化的真核表达质粒pHR共转化大肠杆菌DH5α感受态细胞,分别将转化质粒的感受态细胞均匀涂布于含有相应抗生素的琼脂平板表面,于37℃恒温培养箱过夜培养后分别挑取若干单菌落进行DNA测序。将测序正确的阳性克隆进行质粒提取,从而获得ScFabHuPL7-21Ks(或ScFabHuPL16-42Ks)、ScFabHu34-39Hs表达载体。
ScFabHuPL7-21Ks序列示意图如图9所示,
其中:HuPL7-21VL-CL:人源化PD-L1单抗HuPL7-21轻链;
(GGGGS)8:8个GGGGS重复序列的柔性连接肽;
HuPL7-21VH:人源化PD-L1单抗HuPL7-21重链可变区;
IgG4CH/Ks:含有S228P/L235E/S354C/T366W突变形成“Knobs”结构的IgG4重链恒定区(具体序列例如SEQ ID NO:132);
ScFabHu34-39Hs序列示意图如图10所示,
其中:Hu34-39VL-CL:人源化CD47单抗Hu34-39轻链;
(GGGGS)6:6个GGGGS重复序列的柔性连接肽;
Hu34-39VH:人源化CD47单抗Hu34-39重链可变区;
IgG4CH/Hs:含有S228P/L235E/Y349C/T366S/L368A/Y407V突变形成“Hole”结构的IgG4重链恒定区(具体序列如SEQ ID NO:133)。
以上结构中的CL序列如SEQ ID NO:131所示。
2.抗CD47/抗PD-L1双特异性抗体在Expi-CHO细胞中的瞬时表达
利用Expi-Fectamine CHO Transfection Kit质粒转染试剂盒将上述的ScFabHuPL7-21Ks(或ScFabHuPL16-42Ks)和ScFabHu34-39Hs两个表达载体共重组质粒转染Expi-CHO细胞,在无血清培养基中培养14天后收集Expi-CHO细胞上清液,免疫印迹检测双特异性抗体的表达情况。其中,将由ScFabHuPL7-21Ks和ScFabHu34-39Hs两个单链二聚化而形成的双特异性抗体命名为ScFab(HuPL7-21Ks/Hu34-39Hs),将由ScFabHuPL16-42Ks和ScFabHu34-39Hs两个单链二聚化而形成的双特异性抗体命名为ScFab(HuPL16-42Ks/Hu34-39Hs)。
3.双特异性抗CD47/抗PD-L1抗体的纯化
本发明的双特异性抗体在Expi-CHO细胞中表达并分泌后,采用Protein A亲和层析的方法对其进行纯化,具体方法如下:Protein A亲和层析柱用缓冲液平衡后,将超滤器浓缩过的Expi-CHO细胞培养液上清液进行进样,并以A280(nm)进行监测,用清洗液洗至未结合的蛋白全部被洗脱,然后用洗脱液进行洗脱,以获得相应的双特异性抗体。纯化后的双特异性抗体SEC-HPLC检测纯度,LC-MS检测分子量,进行质量鉴定后用于后续的药学研究。SEC-HPLC、LC-MS鉴定结果表明,双抗ScFab(HuPL7-21Ks/Hu34-39Hs)和ScFab(HuPL16-42Ks/Hu34-39Hs)的纯度均达到95%以上,分子量测定值与理论值匹配。
实施例15高表达hPD-L1稳转细胞株的构建
1.高表达hPD-L1稳转细胞株CHO-K1-hPD-L1、Raji-hPD-L1的构建:
将含hPD-L1(人PD-L1)胞外区序列(UniProtKB-Q9NZQ7(PD-L1Human)>sp|Q9NZQ7|19-238,SEQ ID NO:134)的真核表达质粒pTargeT-hPD-L1以电转的方式转染到CHO-K1细胞(来自中国科学院上海细胞生物学研究所)及Raji细胞(来自宜明昂科生物医药技术有限公司)中,置37℃,5%CO2的培养箱中培养。24h后采用含500ug/ml G418的培养基加压培养。12天后采用FACS检测pool阳性率,将电转质粒后的细胞铺板(1x106个/ml的细胞密度,100ul/孔),将FITC anti-human PD-L1抗体(SINO BIOLOGICAL,10084-MMB6-F)与细胞在4℃孵育60min,以流式细胞仪读取FITC通道下mean值,对结果进行数据分析后,挑出阳性细胞株进行亚克隆,挑选出克隆化的CHO-K1/Raji细胞株,该细胞株高水平表达PD-L1分子,命名为CHO-K1-hPD-L1和Raji-hPD-L1。
实施例16抗CD47/抗PD-L1双特异性抗体ELISA体外结合与阻断实验
1.抗CD47/抗PD-L1双特异性抗体PD-L1结合ELISA实验
将人PD-L1-His蛋白(0.5ug/ml,100ul/孔)包被到96孔酶标板,37℃孵育2h。用1xPBST清洗3次后用5%的脱脂牛奶4℃封闭过夜,用1xPBST清洗3次。双抗浓度从10μg/mL开始,5倍梯度稀释加入酶标板,37℃孵1.5h,对照抗体为Atezolizumab(Sino Biological,Cat:68049-H001,简写Ate);用1xPBST清洗5次后,加入HRP-Anti-Human IgG二抗(Jackson,109-035-003,1:10000),37℃孵育40min。用1xPBST清洗5次,加入显色液TMB,终止后利用酶标仪(thermo,Multiskan FC)读取OD450值,EC50结果如图11所示。
实验结果显示,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)均具有与人PD-L1结合的能力。与人PD-L1结合能力与Atezolizumab相当。
2.抗CD47/抗PD-L1双特异性抗体与PD-1竞争ELISA实验
采用ELISA分析抗体阻断PD1与PD-L1结合的活性。将人PD-L1-hFC蛋白(2ug/ml,100ul/孔)包被到96孔酶标板,37℃孵育2h。用1xPBST清洗3次后用5%的脱脂牛奶4℃封闭过夜。用1xPBST清洗3次后,用双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)或ScFab(HuPL16-42Ks/Hu34-39Hs)作为一抗从10μg/mL开始,3倍梯度稀释,共8个浓度,在梯度稀释的抗PD-L1抗体存在的情况下,与1μg/mL的PD-1-mFc共同加入酶标板37℃孵1.5h,对照抗体为Atezolizumab;用1xPBST清洗5次后,二抗使用Anti-Mouse IgG HRP(Jackson,109-035-003,1:10000),37℃孵育1h。用1xPBST清洗5次后,加入显色液TMB,终止后利用酶标仪读取OD450值。结果如图11所示。
实验结果显示,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)均具有阻断PD-L1与PD-1结合的能力,且阻断能力与Atezolizumab相当。
3.抗CD47/抗PD-L1双特异性抗体CD47结合ELISA实验
采用ELISA分析抗体与CD47结合活性。将人CD47-His蛋白(0.5ug/ml,100ul/孔)包被到96孔酶标板,37℃孵育2h。用1xPBST清洗3次后用5%的脱脂牛奶4℃封闭过夜。用1xPBST清洗3次后,本发明提供的抗CD47/抗PD-L1双抗浓度从50μg/mL开始,5倍梯度稀释加入酶标板,共8个浓度,37℃孵育1.5h,对照抗体为Hu34-39-PE;用1xPBST清洗5次后,二抗使用HRP-Anti-Human IgG(1:10000),37℃孵育40min。用1xPBST清洗5次后,加入显色液TMB,终止后利用酶标仪(thermo,Multiskan FC)读取OD450值。EC50结果如图11所示。
实验结果显示,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)均具有与人CD47结合的能力,结合活性均有不同程度的降低,ScFab(HuPL7-21Ks/Hu34-39Hs)结合EC50值较Hu34-39-PE的EC50值高40倍。
4.抗CD47/抗PD-L1双特异性抗体与SIRPα竞争ELISA实验
采用ELISA分析抗体的阻断活性。将人CD47-His蛋白(0.4ug/ml,100ul/孔)包被到96孔酶标板,37℃孵育2h。用1xPBST清洗3次后用5%的脱脂牛奶4℃封闭过夜。用1xPBST清洗3次后,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)或ScFab(HuPL16-42Ks/Hu34-39Hs)作为一抗从10μg/mL开始,3倍梯度稀释,共8个浓度,在梯度稀释的抗CD47抗体存在的情况下,与2μg/mL的SIRPα-biotin共同加入酶标板37℃孵1.5h,对照抗体为Hu34-39-PE;用1xPBST清洗5次后,二抗使用SA-HRP(Jackson,109-035-003,1:10000),37℃孵育1h。用1xPBST清洗5次后,加入显色液TMB,终止后利用酶标仪读取OD450值,结果如图11所示。
实验结果显示,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)均具有阻断CD47与SIRPα结合的能力,且阻断能力较Hu34-39-PE有所下降,IC50值升高约40倍。
5.抗CD47/抗PD-L1双特异性抗体与CD80竞争ELISA实验
采用ELISA分析抗体阻断PD-L1与CD80结合的活性。将CD80-hFc蛋白(8ug/ml,100ul/孔)包被到96孔酶标板,4℃过夜孵育。用1xPBST清洗3次后用5%的脱脂牛奶37℃封闭2h。用1xPBST清洗3次后,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)或ScFab(HuPL16-42Ks/Hu34-39Hs)作为一抗从30μg/mL开始,3倍梯度稀释,共8个浓度,在梯度稀释的抗PD-L1抗体存在的情况下,与PD-L1-mFc共同加入酶标板37℃孵1.5h,对照抗体为Atezolizumab;用1xPBST清洗5次后,二抗使用Anti-Mouse IgG HRP,37℃孵育1h。用1xPBST清洗5次后,加入显色液TMB,终止后利用酶标仪读取OD450值。结果如图11所示。
实验结果显示,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)均具有阻断PD-L1与CD80结合的能力,且阻断能力与Atezolizumab相当。
以上实验结果表明,本发明的双抗可以差异性结合PD-L1/CD47,从而在保证抗肿瘤活性的同时,可能降低抗体的毒性反应,如血液方面的毒性等。
实施例17抗CD47/抗PD-L1双特异性抗体细胞水平的结合/阻断实验
1.采用FACS检测双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)结合细胞表面PD-L1/CD47的能力。
CHO-K1-hPD-L1/CHO-K1-hCD47稳转细胞株作为PD-L1/CD47提供者,将梯度稀释的抗PD-L1/抗CD47双抗作为一抗加入细胞板,4℃孵育1.5h。二抗使用PE Anti-Human IgG,4℃孵育1h。Atezolizumab、Hu34-39-PE作为阳性对照。流式细胞仪读取585nm波长下mean值和Parent值的乘积,结果如图12所示。
实验结果显示,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)均具有与细胞表面的人PD-L1结合能力,且结合能力与Atezolizumab相当。双抗ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)与细胞表面CD47结合活性较Hu34-39-PE单抗结合活性降低,EC50升高约4倍,Emax降低约2倍。
2.采用FACS检测双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)阻断PD-1/SIRPα结合到细胞表面的能力。
CHO-K1-hPD-L1/CHO-K1-hCD47稳转细胞株作为PD-L1/CD47提供者,在梯度稀释的抗PD-L1抗体/抗CD47抗体存在的情况下,观察PD-L1与PD-1结合、CD47与SIRPα结合的能力情况。双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)或ScFab(HuPL16-42Ks/Hu34-39Hs)作为一抗,梯度稀释后,分别与1μg/mL的PD-1-mFc、SIRPα-biotin共同加入细胞板中37℃孵1.5h,二抗使用PE-Anti-Mouse IgG/PE-SA。Atezolizumab作为阻断PD-1-mFc结合到细胞表面PD-L1的阳性对照,Hu34-39-PE作为阻断SIRPα结合到细胞表面CD47的阳性参照,结果如图12所示。
实验结果显示,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)均具有阻断人PD-1与CHO-K1-PD-L1、SIRPα与CHO-K1-CD47结合的能力,且阻断PD-1与CHO-K1-PD-L1结合的能力与Atezolizumab相当。双抗阻断SIRPα与CHO-K1-CD47结合的能力较Hu34-39-PE有所降低,IC50值增加3倍。
根据ELISA及FACS检测的结果,双抗分子ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)与PD-L1结合与阻断能力与Atezolizumab一致。而双抗分子同CD47的结合能力有所下降。ELISA检测EC50升高约40倍,FACS检测EC50升高约4倍,Emax降低2倍。即双抗分子ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)差异性结合PD-L1/CD47,这有助于增强双抗的肿瘤靶向性和降低双抗的不良反应,特别是针对红细胞的不良反应。
实施例18 FACS检测抗CD47/抗PD-L1双特异性抗体与Raji-hPD-L1细胞双结合及双阻断实验
Raji-hPD-L1肿瘤细胞购自宜明昂科生物医药技术有限公司,Raji-hPD-L1细胞表面除了hPD-L1高表达之外,hCD47也同样高表达,双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)、ScFab(HuPL16-42Ks/Hu34-39Hs)与Raji-hPD-L1细胞表面的hPD-L1和hCD47都结合,而且也能同时阻断CD47/SIRPα的结合和PD-1/PD-L1的结合,表现出双臂结合及双臂阻断的活性。双臂阻断:U型板底每孔铺2.4×105个Raji-hPD-L1细胞,加入一抗,抗体工作浓度从2.5μg/mL开始,2倍梯度稀释,共9个梯度,抗原终浓度1μg/mL的SIRPα-mFc与终浓度1μg/mL的PD-1-mFc均匀混合,抗体50μl与抗原50μl每孔预混,共100μl加入细胞孔中,于4℃孵育1.5h,加入二抗,200μl cell stain buffer洗涤三遍后,加每孔0.8μl PE-anti-mouse-IgG-Fc,于4℃孵育1h,200μl cell stain buffer洗涤三次,100μl cell stain buffer重悬,使用流式细胞仪检测;双臂结合:U型板底每孔铺1.5x106个Raji-hPD-L1细胞,加入一抗,抗体工作浓度从10μg/mL开始,5倍梯度稀释,共8个梯度,于4℃孵育1.5h,加入二抗,200μl cell stain buffer洗涤三遍后,加每孔0.8μl PE-anti-human-IgG-Fc,于4℃孵育1h,200μl cell stain buffer洗涤三次,100μl cell stain buffer重悬,使用流式细胞仪检测。
实验结果如图13所示。表明,本发明的双特异性抗体与双靶点细胞均结合,且能同时阻断双靶点细胞表面CD47/SIRPα结合及PD-1/PD-L1结合。
实施例19抗CD47/抗PD-L1双特异性抗体对小鼠体内移植瘤生长抑制的检测NSG小鼠具有NOD、Prkdcscid、IL2rgnull缺失/变异特征,是目前免疫缺陷程度最高、最适合人源细胞移植的工具小鼠,对人源细胞和组织几乎没有排斥反应。本发明利用NSG小鼠(购自北京百奥赛图基因生物技术有限公司)、Raji-hPD-L1肿瘤细胞建立肿瘤移植模型——Raji-PBMC-NSG模型,研究抗CD47/抗PD-L1双抗分子ScFab(HuPL7-21Ks/Hu34-39Hs)在Raji-hPD-L1淋巴瘤皮下移植模型中的抗肿瘤作用。CD47单抗5F9购自Sino Biological Inc.(Cat:68063-H001)。表14为测试药物在Raji-PBMC-NSG肿瘤模型中的抗肿瘤作用实验设计方案。
表14 Raji-PBMC-NSG模型测试药物实验设计方案
组别 | N | 抗体 | 小鼠品系 | 剂量(mg/kg) | 给药容积(ul/g) | 给药途径 | 给药频次 |
1 | 6 | PBS | NSG | --- | 10 | i.v. | q.w×3 |
2 | 6 | Atezolizumab | NSG | 10 | 10 | i.v. | q.w×3 |
3 | 6 | Atezolizumab+5F9 | NSG | 10+10 | 10 | i.v. | q.w×3 |
4 | 6 | BiAb | NSG | 10 | 10 | i.v. | q.w×3 |
5 | 6 | BiAb | NSG | 20 | 10 | i.v. | q.w×3 |
a:N是指每组小鼠的数量;b:BiAb指双抗ScFab(HuPL7-21Ks/Hu34-39Hs)
各组的肿瘤体积随时间的变化情况如图14所示。本发明的双抗体内抑瘤效果显著优于Atezolizumab,优于单抗联用(Atezolizumab+5F9)。
实施例20抗CD47/抗PD-L1双特异性抗体食蟹猴急性毒性实验
本实施例为本发明的抗CD47/抗PD-L1双特异性抗体ScFab(HuPL7-21Ks/Hu34-39Hs)(简称BiAb)单次静脉输注给予食蟹猴的毒性试验。双抗的给药剂量为10、30、100mg/kg,食蟹猴每组雌雄各1只。抗CD47单抗Hu34-39-PE的给药剂量为30mg/kg,Hu5F9的给药剂量为20mg/kg,每组2只食蟹猴。
单次静脉输注,观察周期为21天。不同时间点经股静脉采血用于血细胞计数、凝血功能指标、血液生化指标等的检测。
药物安全性评价结果显示,截止第21天,所有组无猴死亡,一般状态观察、摄食量、体重等各组均无异常。
给予双抗ScFab(HuPL7-21Ks/Hu34-39Hs)的动物,RBC计数、HGB含量、RET%无变化。双抗ScFab(HuPL7-21Ks/Hu34-39Hs)在10、30、100mg/kg给药剂量下,未显示红细胞毒性及其它血液性毒性。
给予单抗Hu5F9(20mg/kg)的动物,RBC计数和HGB含量明显下降,RET%明显增加。给予单抗Hu34-39-PE(30mg/kg)的动物,RBC计数和HGB含量有一定程度的下降,RET%也有增加,但弱于单抗Hu5F9。Hu5F9显示出明显的红细胞毒性,Hu34-39-PE红细胞毒性弱于Hu5F9。双抗ScFab(HuPL7-21Ks/Hu34-39Hs)的红细胞安全性显著优于单抗Hu34-39-PE和Hu5F9。
上述实施例表明,本发明的抗CD47/抗PD-L1双特异性抗体分子ScFab(HuPL7-21Ks/Hu34-39Hs)差异性结合CD47和PD-L1,较好地保留了与PD-L1的结合和阻断活性,同时没有红细胞毒性及其它血液性毒性,安全性优异。
实施例21抗PD-L1抗体对小鼠体内移植瘤生长抑制的检测
本发明利用NSG小鼠(购自北京百奥赛图基因生物技术有限公司,中国)、Raji-PD-L1肿瘤细胞(购自宜明昂科生物医药技术有限公司,中国)建立肿瘤移植模型——Raji-PBMC-NSG模型,研究本发明的抗体在Raji-hPD-L1淋巴瘤皮下移植模型中的抗肿瘤作用。抗PD-L1阳性对照抗体为Atezolizumab(Sino Biological,Cat:68049-H001)。每组6只小鼠。阴性对照组给予生理盐水(PBS)。本发明的抗PD-L1抗体HuPL7-21和Atezolizumab的给药剂量分别为10mg/kg。给药途径腹腔注射,给药频次为每周2次,连续给药3周。
实验结束,计算各组的肿瘤抑制率(TGITV)%,如表15所示。
表15各抗体对Raji-PBMC-NSG模型小鼠肿瘤体积的影响
本发明的抗PD-L1抗体HuPL7-21体内抑瘤效果显著优于Atezolizumab。
尽管以上已经对本发明作了详细描述,但是本领域技术人员理解,在不偏离本发明的精神和范围的前提下可以对本发明进行各种修改和改变。本发明的权利范围并不限于上文所作的详细描述,而应归属于权利要求书。
序列表
<110> 南京圣和药业股份有限公司
<120> 抗CD47/抗PD-L1抗体及其应用
<150> 202010128900X
<151> 2020-02-28
<160> 134
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50 55 60
Lys Gly Arg Ala Thr Val Thr Ala Asp Lys Ser Thr Ser Thr Val Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Thr Ser Tyr Gly Ser Ser Phe Pro His Val Trp Gly Gln Gly
100 105 110
Thr Thr Val Thr Val Ser Ser
115
<210> 30
<211> 117
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 30
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asn Tyr
20 25 30
Trp Ile Thr Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Asp Ile Thr Pro Gly Arg Gly Glu Thr Asn Tyr Asn Gln Lys Phe
50 55 60
Lys Gly Arg Val Thr Leu Thr Val Asp Ile Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ser Arg Trp Gly Leu Arg Arg Gly Asp Tyr Trp Gly Gln Gly Thr Ser
100 105 110
Val Thr Val Ser Ser
115
<210> 31
<211> 121
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 31
Glu Val Gln Leu Leu Glu Ser Gly Gly Gly Leu Val Gln Pro Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Ile Phe Ser Arg Phe
20 25 30
Gly Met Ala Trp Val Arg Gln Thr Pro Asp Lys Arg Leu Glu Trp Val
35 40 45
Ala Thr Ile Ser Ser Gly Gly Ser Tyr Thr Tyr Tyr Pro Asp Ser Val
50 55 60
Lys Gly Arg Leu Thr Ile Ser Arg Asp Asn Ala Lys Thr Thr Leu Tyr
65 70 75 80
Leu Gln Met Arg Ser Leu Lys Ser Glu Asp Thr Ala Met Tyr Tyr Cys
85 90 95
Ala Arg Gln Gly Leu Leu Asp Tyr Leu Tyr Ala Leu Asp Tyr Trp Gly
100 105 110
Gln Gly Thr Ala Val Thr Val Ser Ser
115 120
<210> 32
<211> 113
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 32
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Lys Ser Ser Gln Ser Leu Leu Asn Val
20 25 30
Asn Asp Gln Lys Asn Tyr Leu Ala Trp Tyr Gln Gln Lys Pro Gly Lys
35 40 45
Ala Pro Lys Leu Leu Ile Tyr Phe Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Ser Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Leu Gln Pro Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln
85 90 95
His Tyr Ser Thr Pro Leu Thr Phe Gly Gln Gly Thr Lys Leu Glu Ile
100 105 110
Lys
<210> 33
<211> 108
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 33
Glu Ile Val Leu Thr Gln Ser Pro Gly Thr Leu Ser Leu Ser Pro Gly
1 5 10 15
Glu Arg Ala Thr Leu Ser Cys Arg Ala Ser Ser Ser Val Ser Ser Ser
20 25 30
Tyr Leu Asn Trp Tyr Gln Gln Lys Ser Gly Ala Ser Pro Lys Leu Trp
35 40 45
Ile Tyr Ser Thr Ser Asn Leu Ala Ser Gly Val Pro Gly Arg Phe Ser
50 55 60
Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Ser Val Glu
65 70 75 80
Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Tyr Ser Gly Tyr Pro
85 90 95
Leu Thr Phe Gly Ala Gly Thr Lys Leu Glu Val Lys
100 105
<210> 34
<211> 107
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 34
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Val Ser Ala Ser Ile Gly
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Lys Ala Ser Gln Asp Ile Asn Ser Phe
20 25 30
Leu Ala Trp Phe Gln Gln Lys Pro Gly Lys Ser Pro Arg Pro Leu Ile
35 40 45
Tyr Arg Ala Tyr Arg Leu Val Asp Gly Val Pro Ser Arg Phe Ser Gly
50 55 60
Val Gly Ser Gly Gln Asp Tyr Ser Leu Thr Ile Ser Ser Leu Asp Tyr
65 70 75 80
Glu Asp Leu Gly Ile Tyr Tyr Cys Gln Gln Tyr Val Glu Phe Pro Pro
85 90 95
Thr Phe Gly Ala Gly Thr Met Leu Glu Leu Lys
100 105
<210> 35
<211> 357
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 35
caggtgcagc tggtgcagag cggagccgaa gtgaagaagc ccggtgccag cgtgaaagta 60
agctgcaagg ccagcggcta caccttcacc gactactaca tgaactgggt gaggcaggcc 120
cctggacaag gcctggagtg gatcggcagg atctaccccg gcagcggcct gacctactat 180
aacgccaagt tcaagggcag ggccaccgtg accgccgaca agtccaccag caccgtgtac 240
atggagctga gcagcctgag gagcgaggac accgccgtgt attactgcgc caggaccagc 300
tacggcagca gcttccccca cgtgtggggc cagggcacca ccgtgaccgt gagctct 357
<210> 36
<211> 351
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 36
caggttcagc tgcaagagag cggtcccggc ctggtgaaac ccagccagac cctgagcctg 60
acctgcaagg ccagcggcta cactttcact aactactgga tcacctgggt gaagcagcga 120
cccggccagg gcctggagtg gatcggcgac atcacccctg ggaggggaga gaccaactac 180
aaccagaagt tcaagggcag ggtgaccctg accgtggaca tcagcgcctc cactgcctat 240
atggagctga gcagcctgag gagcgaggac accgccgtgt actactgcag caggtggggc 300
ctgaggaggg gcgattactg gggccaaggg accagcgtga ccgtgagctc t 351
<210> 37
<211> 363
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 37
gaggtccagc tgctggagag cggcggtggc ctcgtgcagc ccggaggcag cctgaggctg 60
agctgcgcgg caagcggctt catcttcagc aggttcggca tggcctgggt gaggcagacc 120
ccagacaaga ggctggagtg ggtggcaact atcagcagcg gaggaagtta cacctactac 180
cccgacagcg tgaagggcag gctgaccatc agtagggaca acgccaagac caccctgtac 240
ctgcagatga ggagcctgaa gagcgaggac accgccatgt actactgcgc caggcagggc 300
ctgctcgact atctgtacgc cctggactat tggggccagg gcactgccgt gaccgtgagc 360
agc 363
<210> 38
<211> 339
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 38
gacatccaga tgacccagag cccaagcagc ctgagcgcca gcgtgggcga cagggtgacc 60
atcacctgca agagcagcca aagcctgctg aacgtgaacg accagaagaa ctacctggcc 120
tggtatcagc agaagccggg caaggccccc aagctgctca tctactttgc cagcaccagg 180
gagagcggcg tgcccagcag gttcagcggc agcggaagtg gcaccgactt caccctcacc 240
atcagctccc tgcaacccga ggacttcgcc acctactact gtcaacagca ctacagcaca 300
cccctgacct tcggccaggg caccaagttg gagatcaag 339
<210> 39
<211> 324
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 39
gagatcgtgc tgacccagag ccctggcacc ttgagcctga gtcccggaga gagggccacc 60
ctgagctgca gggcctcaag ctccgtgagc agcagctatc tgaattggta tcagcagaag 120
agcggagcca gccccaagct gtggatctac agcaccagca acctggcaag cggcgtgccc 180
ggcaggttca gcggcagtgg cagcgggacc agctacagcc tgaccatcag tagcgtggag 240
gccgaggacg ccgccaccta ctactgccag cagtacagcg gataccctct gaccttcgga 300
gccggaacca agttggaggt gaag 324
<210> 40
<211> 321
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 40
gacatccaga tgacccagag cccaagcagc gtgagcgcca gcatcggcga cagggtgacc 60
ataacctgca aggccagcca agacatcaac agcttcctgg catggttcca gcagaagccc 120
ggcaagagcc ccaggcccct gatctacagg gcctacaggc tggtagacgg ggtgcccagc 180
aggttcagcg gcgtgggcag cggccaggac tacagcctga ccatcagcag cctggactac 240
gaggacctgg gcatctacta ctgccagcag tacgtggagt tccccccgac cttcggtgca 300
gggaccatgc tggagctgaa g 321
<210> 41
<211> 323
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 41
Met Trp Pro Leu Val Ala Ala Leu Leu Leu Gly Ser Ala Cys Cys Gly
1 5 10 15
Ser Ala Gln Leu Leu Phe Asn Lys Thr Lys Ser Val Glu Phe Thr Phe
20 25 30
Cys Asn Asp Thr Val Val Ile Pro Cys Phe Val Thr Asn Met Glu Ala
35 40 45
Gln Asn Thr Thr Glu Val Tyr Val Lys Trp Lys Phe Lys Gly Arg Asp
50 55 60
Ile Tyr Thr Phe Asp Gly Ala Leu Asn Lys Ser Thr Val Pro Thr Asp
65 70 75 80
Phe Ser Ser Ala Lys Ile Glu Val Ser Gln Leu Leu Lys Gly Asp Ala
85 90 95
Ser Leu Lys Met Asp Lys Ser Asp Ala Val Ser His Thr Gly Asn Tyr
100 105 110
Thr Cys Glu Val Thr Glu Leu Thr Arg Glu Gly Glu Thr Ile Ile Glu
115 120 125
Leu Lys Tyr Arg Val Val Ser Trp Phe Ser Pro Asn Glu Asn Ile Leu
130 135 140
Ile Val Ile Phe Pro Ile Phe Ala Ile Leu Leu Phe Trp Gly Gln Phe
145 150 155 160
Gly Ile Lys Thr Leu Lys Tyr Arg Ser Gly Gly Met Asp Glu Lys Thr
165 170 175
Ile Ala Leu Leu Val Ala Gly Leu Val Ile Thr Val Ile Val Ile Val
180 185 190
Gly Ala Ile Leu Phe Val Pro Gly Glu Tyr Ser Leu Lys Asn Ala Thr
195 200 205
Gly Leu Gly Leu Ile Val Thr Ser Thr Gly Ile Leu Ile Leu Leu His
210 215 220
Tyr Tyr Val Phe Ser Thr Ala Ile Gly Leu Thr Ser Phe Val Ile Ala
225 230 235 240
Ile Leu Val Ile Gln Val Ile Ala Tyr Ile Leu Ala Val Val Gly Leu
245 250 255
Ser Leu Cys Ile Ala Ala Cys Ile Pro Met His Gly Pro Leu Leu Ile
260 265 270
Ser Gly Leu Ser Ile Leu Ala Leu Ala Gln Leu Leu Gly Leu Val Tyr
275 280 285
Met Lys Phe Val Ala Ser Asn Gln Lys Thr Ile Gln Pro Pro Arg Lys
290 295 300
Ala Val Glu Glu Pro Leu Asn Ala Phe Lys Glu Ser Lys Gly Met Met
305 310 315 320
Asn Asp Glu
<210> 42
<211> 350
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 42
Gln Leu Leu Phe Asn Lys Thr Lys Ser Val Glu Phe Thr Phe Cys Asn
1 5 10 15
Asp Thr Val Val Ile Pro Cys Phe Val Thr Asn Met Glu Ala Gln Asn
20 25 30
Thr Thr Glu Val Tyr Val Lys Trp Lys Phe Lys Gly Arg Asp Ile Tyr
35 40 45
Thr Phe Asp Gly Ala Leu Asn Lys Ser Thr Val Pro Thr Asp Phe Ser
50 55 60
Ser Ala Lys Ile Glu Val Ser Gln Leu Leu Lys Gly Asp Ala Ser Leu
65 70 75 80
Lys Met Asp Lys Ser Asp Ala Val Ser His Thr Gly Asn Tyr Thr Cys
85 90 95
Glu Val Thr Glu Leu Thr Arg Glu Gly Glu Thr Ile Ile Glu Leu Lys
100 105 110
Tyr Arg Val Val Ser Trp Glu Pro Lys Ser Cys Asp Lys Thr His Thr
115 120 125
Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe
130 135 140
Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro
145 150 155 160
Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu Val
165 170 175
Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr
180 185 190
Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val
195 200 205
Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys
210 215 220
Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser
225 230 235 240
Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro
245 250 255
Ser Arg Asp Glu Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val
260 265 270
Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly
275 280 285
Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp
290 295 300
Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp
305 310 315 320
Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His
325 330 335
Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys
340 345 350
<210> 43
<211> 124
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 43
Gln Leu Leu Phe Asn Lys Thr Lys Ser Val Glu Phe Thr Phe Cys Asn
1 5 10 15
Asp Thr Val Val Ile Pro Cys Phe Val Thr Asn Met Glu Ala Gln Asn
20 25 30
Thr Thr Glu Val Tyr Val Lys Trp Lys Phe Lys Gly Arg Asp Ile Tyr
35 40 45
Thr Phe Asp Gly Ala Leu Asn Lys Ser Thr Val Pro Thr Asp Phe Ser
50 55 60
Ser Ala Lys Ile Glu Val Ser Gln Leu Leu Lys Gly Asp Ala Ser Leu
65 70 75 80
Lys Met Asp Lys Ser Asp Ala Val Ser His Thr Gly Asn Tyr Thr Cys
85 90 95
Glu Val Thr Glu Leu Thr Arg Glu Gly Glu Thr Ile Ile Glu Leu Lys
100 105 110
Tyr Arg Val Val Ser Trp His His His His His His
115 120
<210> 44
<211> 354
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 44
Gln Leu Leu Phe Asn Lys Thr Lys Ser Val Glu Phe Thr Phe Cys Asn
1 5 10 15
Asp Thr Val Val Ile Pro Cys Phe Val Thr Asn Met Glu Ala Gln Asn
20 25 30
Thr Thr Glu Val Tyr Val Lys Trp Lys Phe Lys Gly Arg Asp Ile Tyr
35 40 45
Thr Phe Asp Gly Ala Leu Asn Lys Ser Thr Val Pro Thr Asp Phe Ser
50 55 60
Ser Ala Lys Ile Glu Val Ser Gln Leu Leu Lys Gly Asp Ala Ser Leu
65 70 75 80
Lys Met Asp Lys Ser Asp Ala Val Ser His Thr Gly Asn Tyr Thr Cys
85 90 95
Glu Val Thr Glu Leu Thr Arg Glu Gly Glu Thr Ile Ile Glu Leu Lys
100 105 110
Tyr Arg Val Val Ser Trp Phe Ser Pro Glu Pro Arg Gly Pro Thr Ile
115 120 125
Lys Pro Cys Pro Pro Cys Lys Cys Pro Ala Pro Asn Leu Leu Gly Gly
130 135 140
Pro Ser Val Phe Ile Phe Pro Pro Lys Ile Lys Asp Val Leu Met Ile
145 150 155 160
Ser Leu Ser Pro Ile Val Thr Cys Val Val Val Asp Val Ser Glu Asp
165 170 175
Asp Pro Asp Val Gln Ile Ser Trp Phe Val Asn Asn Val Glu Val His
180 185 190
Thr Ala Gln Thr Gln Thr His Arg Glu Asp Tyr Asn Ser Thr Leu Arg
195 200 205
Val Val Ser Ala Leu Pro Ile Gln His Gln Asp Trp Met Ser Gly Lys
210 215 220
Glu Phe Lys Cys Lys Val Asn Asn Lys Asp Leu Pro Ala Pro Ile Glu
225 230 235 240
Arg Thr Ile Ser Lys Pro Lys Gly Ser Val Arg Ala Pro Gln Val Tyr
245 250 255
Val Leu Pro Pro Pro Glu Glu Glu Met Thr Lys Lys Gln Val Thr Leu
260 265 270
Thr Cys Met Val Thr Asp Phe Met Pro Glu Asp Ile Tyr Val Glu Trp
275 280 285
Thr Asn Asn Gly Lys Thr Glu Leu Asn Tyr Lys Asn Thr Glu Pro Val
290 295 300
Leu Asp Ser Asp Gly Ser Tyr Phe Met Tyr Ser Lys Leu Arg Val Glu
305 310 315 320
Lys Lys Asn Trp Val Glu Arg Asn Ser Tyr Ser Cys Ser Val Val His
325 330 335
Glu Gly Leu His Asn His His Thr Thr Lys Ser Phe Ser Arg Thr Pro
340 345 350
Gly Lys
<210> 45
<211> 338
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 45
Glu Leu Gln Val Ile Gln Pro Asp Lys Ser Val Leu Val Ala Ala Gly
1 5 10 15
Glu Thr Ala Thr Leu Arg Cys Thr Ala Thr Ser Leu Ile Pro Val Gly
20 25 30
Pro Ile Gln Trp Phe Arg Gly Ala Gly Pro Gly Arg Glu Leu Ile Tyr
35 40 45
Asn Gln Lys Glu Gly His Phe Pro Arg Val Thr Thr Val Ser Asp Leu
50 55 60
Thr Lys Arg Asn Asn Met Asp Phe Ser Ile Arg Ile Gly Asn Ile Thr
65 70 75 80
Pro Ala Asp Ala Gly Thr Tyr Tyr Cys Val Lys Phe Arg Lys Gly Ser
85 90 95
Pro Asp Asp Val Glu Phe Lys Ser Gly Ala Gly Thr Glu Leu Ser Val
100 105 110
Arg Ala Lys Pro Ser Ala Pro Val Val Ser Gly Pro Ala Ala Arg Ala
115 120 125
Thr Pro Gln His Thr Val Ser Phe Thr Cys Glu Ser His Gly Phe Ser
130 135 140
Pro Arg Asp Ile Thr Leu Lys Trp Phe Lys Asn Gly Asn Glu Leu Ser
145 150 155 160
Asp Phe Gln Thr Asn Val Asp Pro Val Gly Glu Ser Val Ser Tyr Ser
165 170 175
Ile His Ser Thr Ala Lys Val Val Leu Thr Arg Glu Asp Val His Ser
180 185 190
Gln Val Ile Cys Glu Val Ala His Val Thr Leu Gln Gly Asp Pro Leu
195 200 205
Arg Gly Thr Ala Asn Leu Ser Glu Thr Ile Arg Val Pro Pro Thr Leu
210 215 220
Glu Val Thr Gln Gln Pro Val Arg Ala Glu Asn Gln Val Asn Val Thr
225 230 235 240
Cys Gln Val Arg Lys Phe Tyr Pro Gln Arg Leu Gln Leu Thr Trp Leu
245 250 255
Glu Asn Gly Asn Val Ser Arg Thr Glu Thr Ala Ser Thr Val Thr Glu
260 265 270
Asn Lys Asp Gly Thr Tyr Asn Trp Met Ser Trp Leu Leu Val Asn Val
275 280 285
Ser Ala His Arg Asp Asp Val Lys Leu Thr Cys Gln Val Glu His Asp
290 295 300
Gly Gln Pro Ala Val Ser Lys Ser His Asp Leu Lys Val Ser Ala His
305 310 315 320
Pro Lys Glu Gln Gly Ser Asn Thr Ala Ala Glu Asn Thr Gly Ser Asn
325 330 335
Glu Arg
<210> 46
<211> 466
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 46
Met Glu Phe Gly Leu Ser Trp Leu Phe Leu Val Ala Ile Leu Lys Gly
1 5 10 15
Val Gln Cys Gln Met Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys
20 25 30
Thr Gly Ser Ser Val Lys Val Ser Cys Lys Ala Ser Gly Phe Asn Ile
35 40 45
Lys Asp Tyr Tyr Leu His Trp Val Arg Gln Ala Pro Gly Gln Ala Leu
50 55 60
Glu Trp Met Gly Trp Ile Asp Pro Asp Gln Gly Asp Thr Glu Tyr Ala
65 70 75 80
Gln Lys Phe Gln Asp Arg Val Thr Ile Thr Arg Asp Arg Ser Met Ser
85 90 95
Thr Ala Tyr Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Met
100 105 110
Tyr Tyr Cys Asn Ala Ala Tyr Gly Ser Ser Ser Tyr Pro Met Asp Tyr
115 120 125
Trp Gly Gln Gly Thr Thr Val Thr Val Ser Ser Ala Ser Thr Lys Gly
130 135 140
Pro Ser Val Phe Pro Leu Ala Pro Cys Ser Arg Ser Thr Ser Glu Ser
145 150 155 160
Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val
165 170 175
Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe
180 185 190
Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val
195 200 205
Thr Val Pro Ser Ser Ser Leu Gly Thr Lys Thr Tyr Thr Cys Asn Val
210 215 220
Asp His Lys Pro Ser Asn Thr Lys Val Asp Lys Arg Val Glu Ser Lys
225 230 235 240
Tyr Gly Pro Pro Cys Pro Pro Cys Pro Ala Pro Glu Phe Leu Gly Gly
245 250 255
Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile
260 265 270
Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser Gln Glu
275 280 285
Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly Val Glu Val His
290 295 300
Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe Asn Ser Thr Tyr Arg
305 310 315 320
Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys
325 330 335
Glu Tyr Lys Cys Lys Val Ser Asn Lys Gly Leu Pro Ser Ser Ile Glu
340 345 350
Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr
355 360 365
Thr Leu Pro Pro Ser Gln Glu Glu Met Thr Lys Asn Gln Val Ser Leu
370 375 380
Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp
385 390 395 400
Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val
405 410 415
Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Arg Leu Thr Val Asp
420 425 430
Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser Cys Ser Val Met His
435 440 445
Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Leu
450 455 460
Gly Lys
465
<210> 47
<211> 236
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 47
Met Asp Met Arg Val Pro Ala Gln Leu Leu Gly Leu Leu Leu Leu Trp
1 5 10 15
Phe Pro Gly Ser Arg Cys Asn Ile Gln Met Thr Gln Ser Pro Ser Ala
20 25 30
Met Ser Ala Ser Val Gly Asp Arg Val Thr Ile Thr Cys Lys Ala Ser
35 40 45
Gln Asp Ile His Arg Tyr Leu Ser Trp Phe Gln Gln Lys Pro Gly Lys
50 55 60
Val Pro Lys His Leu Ile Tyr Arg Ala Asn Arg Leu Val Ser Gly Val
65 70 75 80
Pro Ser Arg Phe Ser Gly Ser Gly Ser Gly Thr Glu Phe Thr Leu Thr
85 90 95
Ile Ser Ser Leu Gln Pro Glu Asp Phe Ala Thr Tyr Tyr Cys Leu Gln
100 105 110
Tyr Asp Glu Phe Pro Tyr Thr Phe Gly Gly Gly Thr Lys Val Glu Ile
115 120 125
Lys Arg Thr Val Ala Ala Pro Ser Val Phe Ile Phe Pro Pro Ser Asp
130 135 140
Glu Gln Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu Leu Asn Asn
145 150 155 160
Phe Tyr Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp Asn Ala Leu
165 170 175
Gln Ser Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp Ser Lys Asp
180 185 190
Ser Thr Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser Lys Ala Asp Tyr
195 200 205
Glu Lys His Lys Val Tyr Ala Cys Glu Val Thr His Gln Gly Leu Ser
210 215 220
Ser Pro Val Thr Lys Ser Phe Asn Arg Gly Glu Cys
225 230 235
<210> 48
<211> 117
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 48
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Val Val Gln Pro Gly Arg
1 5 10 15
Ser Leu Arg Leu Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asn Tyr
20 25 30
Trp Ile Thr Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Asp Ile Thr Pro Gly Arg Gly Glu Thr Asn Tyr Asn Pro Ser Leu
50 55 60
Lys Ser Arg Leu Thr Ile Ser Ile Asp Thr Ser Lys Thr Gln Phe Ser
65 70 75 80
Leu Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Ile Tyr Tyr Cys
85 90 95
Ser Arg Trp Gly Leu Arg Arg Gly Asp Tyr Trp Gly Gln Gly Thr Ser
100 105 110
Val Thr Val Ser Ser
115
<210> 49
<211> 117
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 49
Gln Val Gln Leu Gln Gln Pro Gly Ala Glu Leu Val Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asn Tyr
20 25 30
Trp Ile Thr Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Asp Ile Thr Pro Gly Arg Gly Glu Thr Asn Tyr Asn Pro Ser Leu
50 55 60
Lys Ser Arg Leu Thr Ile Ser Ile Asp Thr Ser Lys Thr Gln Phe Ser
65 70 75 80
Leu Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Ile Tyr Tyr Cys
85 90 95
Ser Arg Trp Gly Leu Arg Arg Gly Asp Tyr Trp Gly Gln Gly Thr Ser
100 105 110
Val Thr Val Ser Ser
115
<210> 50
<211> 117
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 50
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Val Val Gln Pro Gly Arg
1 5 10 15
Ser Leu Arg Leu Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asn Tyr
20 25 30
Trp Ile Thr Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Asp Ile Thr Pro Gly Arg Gly Glu Thr Asn Tyr Asn Glu Lys Phe
50 55 60
Lys Ser Lys Ala Thr Leu Thr Val Asp Thr Ser Ser Ser Thr Ala Tyr
65 70 75 80
Met Gln Leu Thr Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys
85 90 95
Ser Arg Trp Gly Leu Arg Arg Gly Asp Tyr Trp Gly Gln Gly Thr Ser
100 105 110
Val Thr Val Ser Ser
115
<210> 51
<211> 118
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 51
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Arg Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asn Tyr
20 25 30
Trp Ile Thr Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Asp Ile Thr Pro Gly Arg Gly Glu Thr Asn Tyr Asn Pro Ser Leu
50 55 60
Lys Ser Arg Leu Thr Ile Ser Ile Asp Thr Ser Lys Thr Gln Phe Ser
65 70 75 80
Leu Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Ile Tyr Tyr Cys
85 90 95
Ser Arg Trp Gly Leu Arg Arg Gly Asp Tyr Trp Gly Gln Gly Thr Ser
100 105 110
Val Thr Val Ser Ser His
115
<210> 52
<211> 117
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 52
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asn Tyr
20 25 30
Trp Ile Thr Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Asp Ile Thr Pro Gly Arg Gly Glu Thr Asn Tyr Asn Gln Lys Phe
50 55 60
Lys Gly Arg Val Thr Leu Thr Val Asp Ile Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ser Arg Trp Gly Leu Arg Arg Gly Asp Tyr Trp Gly Gln Gly Thr Ser
100 105 110
Val Thr Val Ser Ser
115
<210> 53
<211> 117
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 53
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Val Val Gln Pro Gly Arg
1 5 10 15
Ser Leu Arg Leu Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asn Tyr
20 25 30
Trp Ile Thr Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Asp Ile Thr Pro Gly Arg Gly Glu Thr Asn Tyr Asn Gln Lys Phe
50 55 60
Lys Gly Arg Val Thr Leu Thr Val Asp Ile Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ser Arg Trp Gly Leu Arg Arg Gly Asp Tyr Trp Gly Gln Gly Thr Ser
100 105 110
Val Thr Val Ser Ser
115
<210> 54
<211> 108
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 54
Glu Ile Val Leu Thr Gln Ser Pro Ala Thr Leu Ser Leu Ser Pro Gly
1 5 10 15
Glu Arg Ala Thr Leu Ser Cys Arg Ala Ser Ser Ser Val Ser Ser Ser
20 25 30
Tyr Leu Asn Trp Tyr Gln Gln Lys Ser Gly Ala Ser Pro Lys Leu Trp
35 40 45
Ile Tyr Ser Thr Ser Asn Leu Ala Ser Gly Val Pro Gly Arg Phe Ser
50 55 60
Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Ser Val Glu
65 70 75 80
Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Tyr Ser Gly Tyr Pro
85 90 95
Leu Thr Phe Gly Ala Gly Thr Lys Leu Glu Val Lys
100 105
<210> 55
<211> 108
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 55
Glu Ile Val Leu Thr Gln Ser Pro Ala Thr Leu Ser Leu Ser Pro Gly
1 5 10 15
Glu Arg Ala Thr Leu Ser Cys Arg Ala Ser Ser Ser Val Ser Ser Ser
20 25 30
Tyr Leu Asn Trp Tyr Gln Gln Lys Ser Gly Ala Ser Pro Lys Leu Trp
35 40 45
Ile Tyr Ser Thr Ser Asn Leu Ala Ser Gly Val Pro Ser Arg Phe Ser
50 55 60
Gly Ser Gly Ser Gly Thr Ser Phe Thr Leu Thr Ile Ser Ser Leu Gln
65 70 75 80
Pro Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Tyr Ser Gly Tyr Pro
85 90 95
Leu Thr Phe Gly Ala Gly Thr Lys Leu Glu Val Lys
100 105
<210> 56
<211> 108
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 56
Glu Ile Val Leu Thr Gln Ser Pro Gly Thr Leu Ser Leu Ser Pro Gly
1 5 10 15
Glu Arg Ala Thr Leu Ser Cys Arg Ala Ser Ser Ser Val Ser Ser Ser
20 25 30
Tyr Leu Asn Trp Tyr Gln Gln Lys Ser Gly Ala Ser Pro Lys Leu Trp
35 40 45
Ile Tyr Ser Thr Ser Asn Leu Ala Ser Gly Val Pro Gly Arg Phe Ser
50 55 60
Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Ser Val Glu
65 70 75 80
Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Tyr Ser Gly Tyr Pro
85 90 95
Leu Thr Phe Gly Ala Gly Thr Lys Leu Glu Val Lys
100 105
<210> 57
<211> 108
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 57
Glu Ile Val Met Thr Gln Ser Pro Ala Thr Leu Ser Leu Ser Pro Gly
1 5 10 15
Glu Arg Ala Thr Leu Ser Cys Arg Ala Ser Ser Ser Val Ser Ser Ser
20 25 30
Tyr Leu Asn Trp Tyr Gln Gln Lys Ser Gly Ala Ser Pro Lys Leu Trp
35 40 45
Ile Tyr Ser Thr Ser Asn Leu Ala Ser Gly Val Pro Gly Arg Phe Ser
50 55 60
Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Ser Val Glu
65 70 75 80
Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Tyr Ser Gly Tyr Pro
85 90 95
Leu Thr Phe Gly Ala Gly Thr Lys Leu Glu Val Lys
100 105
<210> 58
<211> 121
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 58
Glu Val Gln Leu Val Glu Ser Gly Gly Asp Leu Val Glu Pro Gly Gly
1 5 10 15
Ser Leu Lys Leu Ser Cys Ala Ala Ser Gly Phe Ile Phe Ser Arg Phe
20 25 30
Gly Met Ala Trp Val Arg Gln Thr Pro Asp Lys Arg Leu Glu Trp Val
35 40 45
Ala Thr Ile Ser Ser Gly Gly Ser Tyr Thr Arg Tyr Ser Pro Ser Phe
50 55 60
Gln Gly Gln Val Thr Met Ser Val Asp Lys Ser Ile Thr Thr Ala Tyr
65 70 75 80
Leu Gln Trp Asn Ser Leu Lys Ala Ser Asp Thr Ala Met Tyr Tyr Cys
85 90 95
Ala Arg Gln Gly Leu Leu Asp Tyr Leu Tyr Ala Leu Asp Tyr Trp Gly
100 105 110
Gln Gly Thr Ala Val Thr Val Ser Ser
115 120
<210> 59
<211> 121
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 59
Gln Val Gln Leu Val Glu Ser Gly Gly Gly Val Val Gln Pro Gly Arg
1 5 10 15
Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Ile Phe Ser Arg Phe
20 25 30
Gly Met Ala Trp Val Arg Gln Thr Pro Asp Lys Arg Leu Glu Trp Val
35 40 45
Ala Thr Ile Ser Ser Gly Gly Ser Tyr Thr Tyr Tyr Pro Asp Ser Val
50 55 60
Lys Gly Arg Leu Thr Ile Ser Arg Asp Asn Ala Lys Thr Thr Leu Tyr
65 70 75 80
Leu Gln Met Arg Ser Leu Lys Ser Glu Asp Thr Ala Met Tyr Tyr Cys
85 90 95
Ala Arg Gln Gly Leu Leu Asp Tyr Leu Tyr Ala Leu Asp Tyr Trp Gly
100 105 110
Gln Gly Thr Ala Val Thr Val Ser Ser
115 120
<210> 60
<211> 121
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 60
Leu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Ile Gln Pro Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Ile Phe Ser Arg Phe
20 25 30
Gly Met Ala Trp Val Arg Gln Thr Pro Asp Lys Arg Leu Glu Trp Val
35 40 45
Ala Thr Ile Ser Ser Gly Gly Ser Tyr Thr Asn Tyr Asn Gln Lys Phe
50 55 60
Lys Gly Arg Val Thr Leu Thr Val Asp Ile Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Gln Gly Leu Leu Asp Tyr Leu Tyr Ala Leu Asp Tyr Trp Gly
100 105 110
Gln Gly Thr Ala Val Thr Val Ser Ser
115 120
<210> 61
<211> 121
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 61
Glu Val Gln Leu Leu Glu Ser Gly Gly Gly Leu Val Gln Pro Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Ile Phe Ser Arg Phe
20 25 30
Gly Met Ala Trp Val Arg Gln Thr Pro Asp Lys Arg Leu Glu Trp Val
35 40 45
Ala Thr Ile Ser Ser Gly Gly Ser Tyr Thr Tyr Tyr Pro Asp Ser Val
50 55 60
Lys Gly Arg Leu Thr Ile Ser Arg Asp Asn Ala Lys Thr Thr Leu Tyr
65 70 75 80
Leu Gln Met Arg Ser Leu Lys Ser Glu Asp Thr Ala Met Tyr Tyr Cys
85 90 95
Ala Arg Gln Gly Leu Leu Asp Tyr Leu Tyr Ala Leu Asp Tyr Trp Gly
100 105 110
Gln Gly Thr Ala Val Thr Val Ser Ser
115 120
<210> 62
<211> 121
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 62
Leu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Ile Gln Pro Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Ile Phe Ser Arg Phe
20 25 30
Gly Met Ala Trp Val Arg Gln Thr Pro Asp Lys Arg Leu Glu Trp Val
35 40 45
Ala Thr Ile Ser Ser Gly Gly Ser Tyr Thr Arg Tyr Ser Pro Ser Phe
50 55 60
Gln Gly Gln Val Thr Met Ser Val Asp Lys Ser Ile Thr Thr Ala Tyr
65 70 75 80
Leu Gln Trp Asn Ser Leu Lys Ala Ser Asp Thr Ala Met Tyr Tyr Cys
85 90 95
Ala Arg Gln Gly Leu Leu Asp Tyr Leu Tyr Ala Leu Asp Tyr Trp Gly
100 105 110
Gln Gly Thr Ala Val Thr Val Ser Ser
115 120
<210> 63
<211> 121
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 63
Glu Val Gln Leu Leu Glu Ser Gly Gly Gly Leu Val Gln Pro Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Ile Phe Ser Arg Phe
20 25 30
Gly Met Ala Trp Val Arg Gln Thr Pro Asp Lys Arg Leu Glu Trp Val
35 40 45
Ala Thr Ile Ser Ser Gly Gly Ser Tyr Thr Arg Tyr Ser Pro Ser Phe
50 55 60
Gln Gly Gln Val Thr Met Ser Val Asp Lys Ser Ile Thr Thr Ala Tyr
65 70 75 80
Leu Gln Trp Asn Ser Leu Lys Ala Ser Asp Thr Ala Met Tyr Tyr Cys
85 90 95
Ala Arg Gln Gly Leu Leu Asp Tyr Leu Tyr Ala Leu Asp Tyr Trp Gly
100 105 110
Gln Gly Thr Ala Val Thr Val Ser Ser
115 120
<210> 64
<211> 107
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 64
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Val Ser Ala Ser Ile Gly
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Lys Ala Ser Gln Asp Ile Asn Ser Phe
20 25 30
Leu Thr Trp Phe Gln Gln Lys Pro Gly Lys Ser Pro Arg Pro Leu Ile
35 40 45
Tyr Arg Ala Tyr Arg Leu Val Asp Gly Val Pro Ser Arg Phe Ser Gly
50 55 60
Val Gly Ser Gly Gln Asp Tyr Ser Leu Thr Ile Ser Ser Leu Asp Tyr
65 70 75 80
Glu Asp Leu Gly Ile Tyr Tyr Cys Gln Gln Tyr Val Glu Phe Pro Pro
85 90 95
Thr Phe Gly Ala Gly Thr Met Leu Glu Leu Lys
100 105
<210> 65
<211> 107
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 65
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Val Ser Ala Ser Ile Gly
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Lys Ala Ser Gln Asp Ile Asn Ser Phe
20 25 30
Leu Thr Trp Phe Gln Gln Lys Pro Gly Lys Ser Pro Arg Pro Leu Ile
35 40 45
Tyr Arg Ala Tyr Arg Leu Val Asp Gly Val Pro Ser Arg Phe Ser Gly
50 55 60
Ser Gly Ser Gly Thr Tyr Phe Thr Leu Thr Ile Ser Ser Leu Gln Ala
65 70 75 80
Glu Asp Phe Ala Val Tyr Tyr Cys Gln Gln Tyr Val Glu Phe Pro Pro
85 90 95
Thr Phe Gly Ala Gly Thr Met Leu Glu Leu Lys
100 105
<210> 66
<211> 107
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 66
Asp Ile Lys Met Ile Gln Ser Pro Ser Ser Met Tyr Ala Gly Leu Gly
1 5 10 15
Glu Arg Val Thr Phe Asn Cys Lys Ala Ser Gln Asp Ile Asn Ser Phe
20 25 30
Leu Thr Trp Phe Gln Gln Lys Pro Gly Lys Ser Pro Arg Pro Leu Ile
35 40 45
Tyr Arg Ala Tyr Arg Leu Val Asp Gly Val Pro Ser Arg Phe Ser Gly
50 55 60
Ser Gly Ser Gly Thr Tyr Phe Thr Leu Thr Ile Ser Ser Leu Gln Ala
65 70 75 80
Glu Asp Phe Ala Val Tyr Tyr Cys Gln Gln Tyr Val Glu Phe Pro Pro
85 90 95
Thr Phe Gly Ala Gly Thr Met Leu Glu Leu Lys
100 105
<210> 67
<211> 107
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 67
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Val Ser Ala Ser Ile Gly
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Lys Ala Ser Gln Asp Ile Asn Ser Phe
20 25 30
Leu Thr Trp Phe Gln Gln Lys Pro Gly Lys Ser Pro Arg Pro Leu Ile
35 40 45
Tyr Arg Ala Tyr Arg Leu Val Asp Gly Val Pro Asp Arg Phe Ser Gly
50 55 60
Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr Ile Ser Ser Leu Gln Ala
65 70 75 80
Glu Asp Val Ala Val Tyr Tyr Cys Gln Gln Tyr Val Glu Phe Pro Pro
85 90 95
Thr Phe Gly Ala Gly Thr Met Leu Glu Leu Lys
100 105
<210> 68
<211> 107
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 68
Asp Ile Lys Met Ile Gln Ser Pro Ser Ser Met Tyr Ala Gly Leu Gly
1 5 10 15
Glu Arg Val Thr Phe Asn Cys Lys Ala Ser Gln Asp Ile Asn Ser Phe
20 25 30
Leu Thr Trp Phe Gln Gln Lys Pro Gly Lys Ser Pro Arg Pro Leu Ile
35 40 45
Tyr Arg Ala Tyr Arg Leu Val Asp Gly Val Pro Ser Arg Phe Ser Gly
50 55 60
Val Gly Ser Gly Gln Asp Tyr Ser Leu Thr Ile Ser Ser Leu Asp Tyr
65 70 75 80
Glu Asp Leu Gly Ile Tyr Tyr Cys Gln Gln Tyr Val Glu Phe Pro Pro
85 90 95
Thr Phe Gly Ala Gly Thr Met Leu Glu Leu Lys
100 105
<210> 69
<211> 119
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 69
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asp Tyr
20 25 30
Tyr Met Asn Trp Val Arg Gln Ala Pro Gly Gln Gly Leu Glu Trp Met
35 40 45
Gly Arg Ile Tyr Pro Gly Ser Gly Leu Thr Tyr Tyr Asn Ala Lys Phe
50 55 60
Lys Gly Arg Val Thr Met Thr Arg Asp Thr Ser Thr Ser Thr Val Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Thr Ser Tyr Gly Ser Ser Phe Pro His Val Trp Gly Gln Gly
100 105 110
Thr Thr Val Thr Val Ser Ser
115
<210> 70
<211> 119
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 70
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asp Tyr
20 25 30
Tyr Met Asn Trp Val Arg Gln Ala Pro Gly Gln Gly Leu Glu Trp Met
35 40 45
Gly Arg Ile Tyr Pro Gly Ser Gly Leu Thr Tyr Tyr Asn Ala Lys Phe
50 55 60
Lys Gly Arg Val Thr Met Thr Ala Asp Lys Ser Thr Ser Thr Val Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Thr Ser Tyr Gly Ser Ser Phe Pro His Val Trp Gly Gln Gly
100 105 110
Thr Thr Val Thr Val Ser Ser
115
<210> 71
<211> 119
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 71
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asp Tyr
20 25 30
Tyr Met Asn Trp Val Arg Gln Ala Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Arg Ile Tyr Pro Gly Ser Gly Leu Thr Tyr Tyr Asn Ala Lys Phe
50 55 60
Lys Gly Arg Ala Thr Val Thr Ala Asp Lys Ser Thr Ser Thr Val Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Thr Ser Tyr Gly Ser Ser Phe Pro His Val Trp Gly Gln Gly
100 105 110
Thr Thr Val Thr Val Ser Ser
115
<210> 72
<211> 119
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 72
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Asp Tyr
20 25 30
Tyr Met Asn Trp Val Arg Gln Ala Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Arg Ile Tyr Pro Gly Ser Gly Leu Thr Tyr Tyr Asn Ala Lys Phe
50 55 60
Lys Gly Arg Ala Thr Val Thr Ala Asp Lys Ser Thr Ser Thr Val Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Phe Cys
85 90 95
Ala Arg Thr Ser Tyr Gly Ser Ser Phe Pro His Val Trp Gly Gln Gly
100 105 110
Thr Thr Val Thr Val Ser Ser
115
<210> 73
<211> 113
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 73
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Lys Ser Ser Gln Ser Leu Leu Asn Val
20 25 30
Asn Asp Gln Lys Asn Tyr Leu Ala Trp Tyr Gln Gln Lys Pro Gly Lys
35 40 45
Ala Pro Lys Leu Leu Ile Tyr Phe Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Ser Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Leu Gln Pro Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln
85 90 95
His Tyr Ser Thr Pro Leu Thr Phe Gly Gln Gly Thr Lys Leu Glu Ile
100 105 110
Lys
<210> 74
<211> 113
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 74
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Lys Ser Ser Gln Ser Leu Leu Asn Val
20 25 30
Asn Asp Gln Lys Asn Tyr Leu Ala Trp Tyr Gln Gln Lys Pro Gly Lys
35 40 45
Ala Pro Lys Leu Leu Val Tyr Phe Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Ser Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Leu Gln Pro Glu Asp Phe Ala Thr Tyr Phe Cys Gln Gln
85 90 95
His Tyr Ser Thr Pro Leu Thr Phe Gly Gln Gly Thr Lys Leu Glu Ile
100 105 110
Lys
<210> 75
<211> 10
<212> PRT
<213> 鼠源(Mus musculus)
<400> 75
Gly Asp Ser Ile Thr Ser Gly Tyr Trp Asn
1 5 10
<210> 76
<211> 16
<212> PRT
<213> 鼠源(Mus musculus)
<400> 76
Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Leu Ser Leu Lys Ser
1 5 10 15
<210> 77
<211> 10
<212> PRT
<213> 鼠源(Mus musculus)
<400> 77
Tyr Ile Leu Trp Leu Arg His Phe Asp Tyr
1 5 10
<210> 78
<211> 17
<212> PRT
<213> 鼠源(Mus musculus)
<400> 78
Lys Ser Ser Gln Ser Leu Leu Tyr Ser Ser Asn Gln Lys Asn Ser Leu
1 5 10 15
Ala
<210> 79
<211> 7
<212> PRT
<213> 鼠源(Mus musculus)
<400> 79
Trp Ala Ser Thr Arg Glu Ser
1 5
<210> 80
<211> 9
<212> PRT
<213> 鼠源(Mus musculus)
<400> 80
Gln Gln Tyr Tyr Gly Tyr Pro Leu Thr
1 5
<210> 81
<211> 5
<212> PRT
<213> 鼠源(Mus musculus)
<400> 81
Ser Asp Tyr Trp Asn
1 5
<210> 82
<211> 16
<212> PRT
<213> 鼠源(Mus musculus)
<400> 82
Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Pro Ser Leu Lys Arg
1 5 10 15
<210> 83
<211> 10
<212> PRT
<213> 鼠源(Mus musculus)
<400> 83
Tyr Arg Asp Trp Pro Gly Tyr Phe Asp Val
1 5 10
<210> 84
<211> 11
<212> PRT
<213> 鼠源(Mus musculus)
<400> 84
Arg Ala Ser Lys Ser Ile Arg Lys Phe Leu Ala
1 5 10
<210> 85
<211> 7
<212> PRT
<213> 鼠源(Mus musculus)
<400> 85
Ser Gly Ser Thr Leu Gln Ser
1 5
<210> 86
<211> 9
<212> PRT
<213> 鼠源(Mus musculus)
<400> 86
Gln His Tyr Asn Glu Tyr Pro Phe Thr
1 5
<210> 87
<211> 10
<212> PRT
<213> 鼠源(Mus musculus)
<400> 87
Gly Tyr Thr Phe Thr Arg Asn Thr Met His
1 5 10
<210> 88
<211> 17
<212> PRT
<213> 鼠源(Mus musculus)
<400> 88
Phe Ile Asp Pro His Asn Thr Tyr Thr Arg Tyr Asn Gln Lys Phe Lys
1 5 10 15
Asp
<210> 89
<211> 5
<212> PRT
<213> 鼠源(Mus musculus)
<400> 89
Trp Pro Met Asp Tyr
1 5
<210> 90
<211> 17
<212> PRT
<213> 鼠源(Mus musculus)
<400> 90
Lys Ser Ser Gln Ser Leu Ser Trp Ser Glu Asn Gln Asn Asn Tyr Leu
1 5 10 15
Ser
<210> 91
<211> 7
<212> PRT
<213> 鼠源(Mus musculus)
<400> 91
Gly Ala Ser Ile Arg Glu Ser
1 5
<210> 92
<211> 11
<212> PRT
<213> 鼠源(Mus musculus)
<400> 92
Gln His Asn His Gly Ser Phe Leu Pro Tyr Thr
1 5 10
<210> 93
<211> 5
<212> PRT
<213> 鼠源(Mus musculus)
<400> 93
Ser Asn Trp Met Asn
1 5
<210> 94
<211> 17
<212> PRT
<213> 鼠源(Mus musculus)
<400> 94
Met Ile His Leu Tyr Asp Ser Glu Thr Lys Leu Asn Pro Asn Phe Gln
1 5 10 15
Asp
<210> 95
<211> 9
<212> PRT
<213> 鼠源(Mus musculus)
<400> 95
Ser Ala Gly Asn Tyr Arg Phe Ala Tyr
1 5
<210> 96
<211> 11
<212> PRT
<213> 鼠源(Mus musculus)
<400> 96
Lys Ala Ser Gln Ser Val Ser Asn Glu Val Ala
1 5 10
<210> 97
<211> 7
<212> PRT
<213> 鼠源(Mus musculus)
<400> 97
Ser Ala Ser Ser Arg Tyr Thr
1 5
<210> 98
<211> 9
<212> PRT
<213> 鼠源(Mus musculus)
<400> 98
Gln Gln His Tyr Ser Ser Pro Leu Thr
1 5
<210> 99
<211> 118
<212> PRT
<213> 鼠源(Mus musculus)
<400> 99
Glu Val Gln Leu Gln Glu Ser Gly Pro Ser Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Ser Val Thr Gly Asp Ser Ile Thr Ser Gly
20 25 30
Tyr Trp Asn Trp Ile Arg Lys Phe Pro Gly Asn Lys Leu Glu Tyr Met
35 40 45
Gly Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Leu Ser Leu Lys
50 55 60
Ser Arg Ile Ser Ile Thr Arg Asp Thr Ser Lys Asn Gln Tyr Tyr Leu
65 70 75 80
Gln Leu Asn Ser Val Thr Thr Glu Asp Thr Ala Thr Tyr Tyr Cys Ala
85 90 95
Arg Tyr Ile Leu Trp Leu Arg His Phe Asp Tyr Trp Gly Gln Gly Thr
100 105 110
Thr Leu Thr Val Ser Ser
115
<210> 100
<211> 118
<212> PRT
<213> 鼠源(Mus musculus)
<400> 100
Glu Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Ala Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Ser Val Thr Gly Tyr Ser Ile Thr Ser Asp
20 25 30
Tyr Trp Asn Trp Ile Arg Lys Phe Pro Gly Asn Lys Leu Glu Tyr Met
35 40 45
Gly Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Pro Ser Leu Lys
50 55 60
Arg Arg Val Ser Ile Thr Arg Asp Thr Ser Lys Asn Asn Tyr Tyr Leu
65 70 75 80
Gln Leu Asn Ser Val Thr Thr Glu Asp Thr Ala Thr Tyr Tyr Cys Ala
85 90 95
Arg Tyr Arg Asp Trp Pro Gly Tyr Phe Asp Val Trp Gly Ala Gly Thr
100 105 110
Thr Val Thr Val Ser Ser
115
<210> 101
<211> 114
<212> PRT
<213> 鼠源(Mus musculus)
<400> 101
Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala
1 5 10 15
Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Arg Asn
20 25 30
Thr Met His Trp Ile Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Phe Ile Asp Pro His Asn Thr Tyr Thr Arg Tyr Asn Gln Lys Phe
50 55 60
Lys Asp Arg Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr
65 70 75 80
Met Gln Leu Ser Ser Leu Ser Ser Glu Asp Ser Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Trp Pro Met Asp Tyr Trp Gly Gln Gly Thr Ser Val Thr Val
100 105 110
Ser Ser
<210> 102
<211> 118
<212> PRT
<213> 鼠源(Mus musculus)
<400> 102
Gln Val Gln Leu Gln Gln Pro Gly Ala Glu Leu Val Arg Pro Gly Thr
1 5 10 15
Ser Val Asn Leu Ser Cys Lys Ala Ser Gly Tyr Ser Phe Thr Ser Asn
20 25 30
Trp Met Asn Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile
35 40 45
Gly Met Ile His Leu Tyr Asp Ser Glu Thr Lys Leu Asn Pro Asn Phe
50 55 60
Gln Asp Lys Ala Thr Leu Thr Val Asp Lys Ser Ser Ser Ile Ala Tyr
65 70 75 80
Met Gln Leu Ser Ser Pro Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Ser Ala Gly Asn Tyr Arg Phe Ala Tyr Trp Gly Gln Gly Thr
100 105 110
Leu Val Thr Val Ser Ala
115
<210> 103
<211> 113
<212> PRT
<213> 鼠源(Mus musculus)
<400> 103
Asp Ile Val Met Ser Gln Ser Pro Ser Ser Leu Ala Val Ser Val Gly
1 5 10 15
Glu Lys Val Thr Met Ser Cys Lys Ser Ser Gln Ser Leu Leu Tyr Ser
20 25 30
Ser Asn Gln Lys Asn Ser Leu Ala Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Ser Pro Lys Leu Leu Ile Tyr Trp Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Thr Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Val Lys Ala Glu Asp Leu Ala Val Tyr Tyr Cys Gln Gln
85 90 95
Tyr Tyr Gly Tyr Pro Leu Thr Phe Gly Ala Gly Thr Lys Leu Glu Leu
100 105 110
Lys
<210> 104
<211> 107
<212> PRT
<213> 鼠源(Mus musculus)
<400> 104
Asp Val Gln Ile Thr Gln Ser Pro Ser Tyr Leu Ala Ala Ser Pro Gly
1 5 10 15
Glu Thr Ile Thr Ile Asn Cys Arg Ala Ser Lys Ser Ile Arg Lys Phe
20 25 30
Leu Ala Trp Tyr Gln Glu Lys Pro Gly Lys Thr Asn Lys Leu Leu Ile
35 40 45
Tyr Ser Gly Ser Thr Leu Gln Ser Gly Ile Pro Ser Arg Phe Ser Gly
50 55 60
Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr Ile Ser Thr Leu Glu Pro
65 70 75 80
Glu Asp Phe Ala Val Tyr Tyr Cys Gln His Tyr Asn Glu Tyr Pro Phe
85 90 95
Thr Phe Gly Gly Gly Thr Lys Leu Glu Ile Lys
100 105
<210> 105
<211> 115
<212> PRT
<213> 鼠源(Mus musculus)
<400> 105
Asp Ile Val Met Thr Gln Phe Pro Ser Ser Leu Ala Val Thr Ala Gly
1 5 10 15
Glu Lys Val Thr Met Arg Cys Lys Ser Ser Gln Ser Leu Ser Trp Ser
20 25 30
Glu Asn Gln Asn Asn Tyr Leu Ser Trp Tyr Gln Gln Lys Gln Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Gly Ala Ser Ile Arg Glu Ser Trp Val
50 55 60
Pro Asp Arg Phe Thr Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Asn Val His Ala Glu Asp Leu Gly Val Tyr Phe Cys Gln His
85 90 95
Asn His Gly Ser Phe Leu Pro Tyr Thr Phe Gly Gly Gly Thr Lys Leu
100 105 110
Glu Ile Lys
115
<210> 106
<211> 107
<212> PRT
<213> 鼠源(Mus musculus)
<400> 106
Ser Ile Val Met Thr Gln Thr Pro Lys Phe Leu Pro Val Thr Ala Glu
1 5 10 15
Asp Arg Val Thr Ile Thr Cys Lys Ala Ser Gln Ser Val Ser Asn Glu
20 25 30
Val Ala Trp Tyr Gln Gln Lys Pro Gly Gln Ser Pro Lys Leu Leu Ile
35 40 45
Tyr Ser Ala Ser Ser Arg Tyr Thr Gly Val Pro Asp Arg Phe Ile Gly
50 55 60
Gly Gly Ser Ala Thr Asp Phe Thr Phe Thr Ile Ser Ser Val Gln Val
65 70 75 80
Glu Asp Leu Ala Val Tyr Phe Cys Gln Gln His Tyr Ser Ser Pro Leu
85 90 95
Thr Phe Gly Ala Gly Thr Lys Leu Glu Leu Lys
100 105
<210> 107
<211> 99
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 107
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Gly Ser Ile Ser Ser Gly
20 25 30
Gly Tyr Tyr Trp Ser Trp Ile Arg Gln His Pro Gly Lys Gly Leu Glu
35 40 45
Trp Ile Gly Tyr Ile Tyr Tyr Ser Gly Ser Thr Tyr Tyr Asn Pro Ser
50 55 60
Leu Lys Ser Arg Val Thr Ile Ser Val Asp Thr Ser Lys Asn Gln Phe
65 70 75 80
Ser Leu Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Val Tyr Tyr
85 90 95
Cys Ala Arg
<210> 108
<211> 98
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 108
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr
20 25 30
Ala Met His Trp Val Arg Gln Ala Pro Gly Gln Arg Leu Glu Trp Met
35 40 45
Gly Trp Ile Asn Ala Gly Asn Gly Asn Thr Lys Tyr Ser Gln Lys Phe
50 55 60
Gln Gly Arg Val Thr Ile Thr Arg Asp Thr Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg
<210> 109
<211> 101
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 109
Asp Ile Val Met Thr Gln Ser Pro Asp Ser Leu Ala Val Ser Leu Gly
1 5 10 15
Glu Arg Ala Thr Ile Asn Cys Lys Ser Ser Gln Ser Val Leu Tyr Ser
20 25 30
Ser Asn Asn Lys Asn Tyr Leu Ala Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Trp Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Leu Gln Ala Glu Asp Val Ala Val Tyr Tyr Cys Gln Gln
85 90 95
Tyr Tyr Ser Thr Pro
100
<210> 110
<211> 118
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 110
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Asp Ser Ile Thr Ser Gly
20 25 30
Tyr Trp Asn Trp Ile Arg Gln His Pro Gly Lys Gly Leu Glu Trp Ile
35 40 45
Gly Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Leu Ser Leu Lys
50 55 60
Ser Arg Val Thr Ile Ser Val Asp Thr Ser Lys Asn Gln Phe Ser Leu
65 70 75 80
Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Arg Tyr Ile Leu Trp Leu Arg His Phe Asp Tyr Trp Gly Gln Gly Thr
100 105 110
Leu Val Thr Val Ser Ser
115
<210> 111
<211> 118
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 111
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Asp Ser Ile Thr Ser Gly
20 25 30
Tyr Trp Asn Trp Ile Arg Gln His Pro Gly Lys Gly Leu Glu Tyr Ile
35 40 45
Gly Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Leu Ser Leu Lys
50 55 60
Ser Arg Val Thr Ile Ser Val Asp Thr Ser Lys Asn Gln Phe Ser Leu
65 70 75 80
Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Arg Tyr Ile Leu Trp Leu Arg His Phe Asp Tyr Trp Gly Gln Gly Thr
100 105 110
Leu Val Thr Val Ser Ser
115
<210> 112
<211> 118
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 112
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Asp Ser Ile Thr Ser Gly
20 25 30
Tyr Trp Asn Trp Ile Arg Gln His Pro Gly Lys Gly Leu Glu Tyr Ile
35 40 45
Gly Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Leu Ser Leu Lys
50 55 60
Ser Arg Val Thr Ile Ser Arg Asp Thr Ser Lys Asn Gln Phe Ser Leu
65 70 75 80
Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Arg Tyr Ile Leu Trp Leu Arg His Phe Asp Tyr Trp Gly Gln Gly Thr
100 105 110
Leu Val Thr Val Ser Ser
115
<210> 113
<211> 118
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 113
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Asp Ser Ile Thr Ser Gly
20 25 30
Tyr Trp Asn Trp Ile Arg Gln His Pro Gly Lys Gly Leu Glu Tyr Ile
35 40 45
Gly Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Leu Ser Leu Lys
50 55 60
Ser Arg Ile Thr Ile Ser Arg Asp Thr Ser Lys Asn Gln Tyr Ser Leu
65 70 75 80
Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Arg Tyr Ile Leu Trp Leu Arg His Phe Asp Tyr Trp Gly Gln Gly Thr
100 105 110
Leu Val Thr Val Ser Ser
115
<210> 114
<211> 118
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 114
Gln Val Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln
1 5 10 15
Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Asp Ser Ile Thr Ser Gly
20 25 30
Tyr Trp Asn Trp Ile Arg Gln His Pro Gly Lys Gly Leu Glu Tyr Met
35 40 45
Gly Tyr Ile Ser Tyr Thr Gly Ser Thr Tyr Tyr Asn Leu Ser Leu Lys
50 55 60
Ser Arg Ile Thr Ile Ser Arg Asp Thr Ser Lys Asn Gln Tyr Ser Leu
65 70 75 80
Lys Leu Ser Ser Val Thr Ala Ala Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Arg Tyr Ile Leu Trp Leu Arg His Phe Asp Tyr Trp Gly Gln Gly Thr
100 105 110
Leu Leu Thr Val Ser Ser
115
<210> 115
<211> 113
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 115
Asp Ile Val Met Thr Gln Ser Pro Asp Ser Leu Ala Val Ser Leu Gly
1 5 10 15
Glu Arg Ala Thr Ile Asn Cys Lys Ser Ser Gln Ser Leu Leu Tyr Ser
20 25 30
Ser Asn Gln Lys Asn Ser Leu Ala Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Trp Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Leu Gln Ala Glu Asp Val Ala Val Tyr Tyr Cys Gln Gln
85 90 95
Tyr Tyr Gly Tyr Pro Leu Thr Phe Gly Gly Gly Thr Lys Leu Glu Ile
100 105 110
Lys
<210> 116
<211> 113
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 116
Asp Ile Val Met Thr Gln Ser Pro Asp Ser Leu Ala Val Ser Leu Gly
1 5 10 15
Glu Arg Ala Thr Ile Ser Cys Lys Ser Ser Gln Ser Leu Leu Tyr Ser
20 25 30
Ser Asn Gln Lys Asn Ser Leu Ala Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Trp Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Leu Gln Ala Glu Asp Val Ala Val Tyr Tyr Cys Gln Gln
85 90 95
Tyr Tyr Gly Tyr Pro Leu Thr Phe Gly Gly Gly Thr Lys Leu Glu Ile
100 105 110
Lys
<210> 117
<211> 113
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 117
Asp Ile Val Met Thr Gln Ser Pro Asp Ser Leu Ala Val Ser Leu Gly
1 5 10 15
Glu Arg Val Thr Ile Ser Cys Lys Ser Ser Gln Ser Leu Leu Tyr Ser
20 25 30
Ser Asn Gln Lys Asn Ser Leu Ala Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Trp Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Val Gln Ala Glu Asp Val Ala Val Tyr Tyr Cys Gln Gln
85 90 95
Tyr Tyr Gly Tyr Pro Leu Thr Phe Gly Gly Gly Thr Lys Leu Glu Ile
100 105 110
Lys
<210> 118
<211> 113
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 118
Asp Ile Val Met Thr Gln Ser Pro Asp Ser Leu Ala Val Ser Leu Gly
1 5 10 15
Glu Arg Val Thr Met Ser Cys Lys Ser Ser Gln Ser Leu Leu Tyr Ser
20 25 30
Ser Asn Gln Lys Asn Ser Leu Ala Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Trp Ala Ser Thr Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Val Gln Ala Glu Asp Val Ala Val Tyr Tyr Cys Gln Gln
85 90 95
Tyr Tyr Gly Tyr Pro Leu Thr Phe Gly Gly Gly Thr Lys Leu Glu Ile
100 105 110
Lys
<210> 119
<211> 114
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 119
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Arg Asn
20 25 30
Thr Met His Trp Val Arg Gln Ala Pro Gly Gln Arg Leu Glu Trp Met
35 40 45
Gly Phe Ile Asp Pro His Asn Thr Tyr Thr Arg Tyr Asn Gln Lys Phe
50 55 60
Lys Asp Arg Val Thr Ile Thr Arg Asp Thr Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Trp Pro Met Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr Val
100 105 110
Ser Ser
<210> 120
<211> 114
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 120
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Arg Asn
20 25 30
Thr Met His Trp Val Arg Gln Ala Pro Gly Gln Arg Leu Glu Trp Met
35 40 45
Gly Phe Ile Asp Pro His Asn Thr Tyr Thr Arg Tyr Asn Gln Lys Phe
50 55 60
Lys Asp Arg Val Thr Ile Thr Ala Asp Thr Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Trp Pro Met Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr Val
100 105 110
Ser Ser
<210> 121
<211> 114
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 121
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Arg Asn
20 25 30
Thr Met His Trp Ile Arg Gln Ala Pro Gly Gln Arg Leu Glu Trp Met
35 40 45
Gly Phe Ile Asp Pro His Asn Thr Tyr Thr Arg Tyr Asn Gln Lys Phe
50 55 60
Lys Asp Arg Val Thr Ile Thr Ala Asp Thr Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Trp Pro Met Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr Val
100 105 110
Ser Ser
<210> 122
<211> 114
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 122
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Ala Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Val Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Arg Asn
20 25 30
Thr Met His Trp Ile Arg Gln Ala Pro Gly Gln Arg Leu Glu Trp Ile
35 40 45
Gly Phe Ile Asp Pro His Asn Thr Tyr Thr Arg Tyr Asn Gln Lys Phe
50 55 60
Lys Asp Arg Ala Thr Ile Thr Ala Asp Thr Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Trp Pro Met Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr Val
100 105 110
Ser Ser
<210> 123
<211> 114
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 123
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Ala Lys Pro Gly Ala
1 5 10 15
Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Arg Asn
20 25 30
Thr Met His Trp Ile Lys Gln Ala Pro Gly Gln Arg Leu Glu Trp Ile
35 40 45
Gly Phe Ile Asp Pro His Asn Thr Tyr Thr Arg Tyr Asn Gln Lys Phe
50 55 60
Lys Asp Arg Ala Thr Leu Thr Ala Asp Thr Ser Ala Ser Thr Ala Tyr
65 70 75 80
Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95
Ala Arg Trp Pro Met Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr Val
100 105 110
Ser Ser
<210> 124
<211> 115
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 124
Asp Ile Val Met Thr Gln Ser Pro Asp Ser Leu Ala Val Ser Leu Gly
1 5 10 15
Glu Arg Ala Thr Ile Asn Cys Lys Ser Ser Gln Ser Leu Ser Trp Ser
20 25 30
Glu Asn Gln Asn Asn Tyr Leu Ser Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Gly Ala Ser Ile Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Leu Gln Ala Glu Asp Val Ala Val Tyr Tyr Cys Gln His
85 90 95
Asn His Gly Ser Phe Leu Pro Tyr Thr Phe Gly Gln Gly Thr Lys Leu
100 105 110
Glu Ile Lys
115
<210> 125
<211> 115
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 125
Asp Ile Val Met Thr Gln Ser Pro Asp Ser Leu Ala Val Ser Leu Gly
1 5 10 15
Glu Arg Val Thr Ile Asn Cys Lys Ser Ser Gln Ser Leu Ser Trp Ser
20 25 30
Glu Asn Gln Asn Asn Tyr Leu Ser Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Gly Ala Ser Ile Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Val Gln Ala Glu Asp Val Gly Val Tyr Tyr Cys Gln His
85 90 95
Asn His Gly Ser Phe Leu Pro Tyr Thr Phe Gly Gln Gly Thr Lys Leu
100 105 110
Glu Ile Lys
115
<210> 126
<211> 115
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 126
Asp Ile Val Met Thr Gln Ser Pro Asp Ser Leu Ala Val Ser Leu Gly
1 5 10 15
Glu Arg Val Thr Met Arg Cys Lys Ser Ser Gln Ser Leu Ser Trp Ser
20 25 30
Glu Asn Gln Asn Asn Tyr Leu Ser Trp Tyr Gln Gln Lys Pro Gly Gln
35 40 45
Pro Pro Lys Leu Leu Ile Tyr Gly Ala Ser Ile Arg Glu Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr
65 70 75 80
Ile Ser Ser Val Gln Ala Glu Asp Val Gly Val Tyr Tyr Cys Gln His
85 90 95
Asn His Gly Ser Phe Leu Pro Tyr Thr Phe Gly Gln Gly Thr Lys Leu
100 105 110
Glu Ile Lys
115
<210> 127
<211> 354
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 127
caggttcagc tgcaggagtc cggccctggc ctggtgaagc ccagccagac cctgagcctg 60
acctgtaccg tgagcggcga cagcatcact agcggctact ggaactggat caggcaacac 120
cccggcaagg gcctggagta catcggctac atcagctaca ccggcagcac ctactacaac 180
ctgagtctga agagcagggt gaccatcagc cgggacacca gcaagaacca gttctctctg 240
aagctgagca gcgtgactgc ggcggatacc gccgtgtact actgcgccag gtacatcctg 300
tggttgaggc acttcgacta ctggggccag ggcaccctgg tgaccgttag ctct 354
<210> 128
<211> 342
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 128
caggtgcagc tggtgcagag cggagctgag gtggccaagc caggcgccag cgtgaagatg 60
tcctgcaagg ccagcggcta cacctttacc cggaacacaa tgcactggat taagcaggcc 120
cccggccagc ggctggagtg gatcggcttc atcgacccac acaataccta caccagatac 180
aaccagaagt ttaaggaccg ggccaccctg accgccgata catcagcatc aacagcttac 240
atggagctga gtagtctgag atctgaggat acagccgtgt actattgcgc tagatggcct 300
atggattact ggggccaggg aaccctggtg accgtgtcta gc 342
<210> 129
<211> 339
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 129
gacatcgtga tgacccagag ccccgactcc ctggccgtga gcctgggcga gagggccacc 60
atctcctgca agagcagtca gagccttctg tatagctcca accagaagaa cagcctggcc 120
tggtatcaac agaagcccgg tcaacccccc aagctgctga tctactgggc ctcaaccagg 180
gaaagcggcg tgcccgacag gttcagcggc agtggcagcg gcaccgactt caccctgacc 240
atcagctcct tgcaggccga ggacgtggca gtgtactact gccagcagta ctacggctac 300
cccctgacat tcggaggggg aaccaagttg gagatcaag 339
<210> 130
<211> 345
<212> DNA
<213> 人工序列(Artificial Sequence)
<400> 130
gatatcgtga tgacccagag cccagatagc ctggccgtga gcctgggaga gagagtgacc 60
atgagatgta agtctagtca gagtctgagt tggagcgaga atcagaacaa ttacctgagc 120
tggtatcagc agaagcctgg ccagcctcca aagctgctga tctacggcgc ctccatccgg 180
gagagcggag tgcccgaccg cttcagcggc agcggcagcg gcacagactt caccctgacc 240
atcagcagcg tgcaggccga ggatgtgggc gtgtactact gtcagcacaa ccacggcagc 300
ttcctgccct acaccttcgg gcagggcacc aagctggaga tcaag 345
<210> 131
<211> 107
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 131
Arg Thr Val Ala Ala Pro Ser Val Phe Ile Phe Pro Pro Ser Asp Glu
1 5 10 15
Gln Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu Leu Asn Asn Phe
20 25 30
Tyr Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp Asn Ala Leu Gln
35 40 45
Ser Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp Ser Lys Asp Ser
50 55 60
Thr Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu
65 70 75 80
Lys His Lys Val Tyr Ala Cys Glu Val Thr His Gln Gly Leu Ser Ser
85 90 95
Pro Val Thr Lys Ser Phe Asn Arg Gly Glu Cys
100 105
<210> 132
<211> 327
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 132
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Cys Ser Arg
1 5 10 15
Ser Thr Ser Glu Ser Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Lys Thr
65 70 75 80
Tyr Thr Cys Asn Val Asp His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Ser Lys Tyr Gly Pro Pro Cys Pro Pro Cys Pro Ala Pro
100 105 110
Glu Phe Glu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys
115 120 125
Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val
130 135 140
Asp Val Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp
145 150 155 160
Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe
165 170 175
Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp
180 185 190
Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Gly Leu
195 200 205
Pro Ser Ser Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg
210 215 220
Glu Pro Gln Val Tyr Thr Leu Pro Pro Cys Gln Glu Glu Met Thr Lys
225 230 235 240
Asn Gln Val Ser Leu Trp Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp
245 250 255
Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys
260 265 270
Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser
275 280 285
Arg Leu Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser
290 295 300
Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser
305 310 315 320
Leu Ser Leu Ser Leu Gly Lys
325
<210> 133
<211> 327
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 133
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Cys Ser Arg
1 5 10 15
Ser Thr Ser Glu Ser Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Lys Thr
65 70 75 80
Tyr Thr Cys Asn Val Asp His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Ser Lys Tyr Gly Pro Pro Cys Pro Pro Cys Pro Ala Pro
100 105 110
Glu Phe Glu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys
115 120 125
Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val
130 135 140
Asp Val Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp
145 150 155 160
Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe
165 170 175
Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp
180 185 190
Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Gly Leu
195 200 205
Pro Ser Ser Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg
210 215 220
Glu Pro Gln Val Cys Thr Leu Pro Pro Ser Gln Glu Glu Met Thr Lys
225 230 235 240
Asn Gln Val Ser Leu Ser Cys Ala Val Lys Gly Phe Tyr Pro Ser Asp
245 250 255
Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys
260 265 270
Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Val Ser
275 280 285
Arg Leu Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser
290 295 300
Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser
305 310 315 320
Leu Ser Leu Ser Leu Gly Lys
325
<210> 134
<211> 220
<212> PRT
<213> 人工序列(Artificial Sequence)
<400> 134
Phe Thr Val Thr Val Pro Lys Asp Leu Tyr Val Val Glu Tyr Gly Ser
1 5 10 15
Asn Met Thr Ile Glu Cys Lys Phe Pro Val Glu Lys Gln Leu Asp Leu
20 25 30
Ala Ala Leu Ile Val Tyr Trp Glu Met Glu Asp Lys Asn Ile Ile Gln
35 40 45
Phe Val His Gly Glu Glu Asp Leu Lys Val Gln His Ser Ser Tyr Arg
50 55 60
Gln Arg Ala Arg Leu Leu Lys Asp Gln Leu Ser Leu Gly Asn Ala Ala
65 70 75 80
Leu Gln Ile Thr Asp Val Lys Leu Gln Asp Ala Gly Val Tyr Arg Cys
85 90 95
Met Ile Ser Tyr Gly Gly Ala Asp Tyr Lys Arg Ile Thr Val Lys Val
100 105 110
Asn Ala Pro Tyr Asn Lys Ile Asn Gln Arg Ile Leu Val Val Asp Pro
115 120 125
Val Thr Ser Glu His Glu Leu Thr Cys Gln Ala Glu Gly Tyr Pro Lys
130 135 140
Ala Glu Val Ile Trp Thr Ser Ser Asp His Gln Val Leu Ser Gly Lys
145 150 155 160
Thr Thr Thr Thr Asn Ser Lys Arg Glu Glu Lys Leu Phe Asn Val Thr
165 170 175
Ser Thr Leu Arg Ile Asn Thr Thr Thr Asn Glu Ile Phe Tyr Cys Thr
180 185 190
Phe Arg Arg Leu Asp Pro Glu Glu Asn His Thr Ala Glu Leu Val Ile
195 200 205
Pro Glu Leu Pro Leu Ala His Pro Pro Asn Glu Arg
210 215 220
Claims (17)
1.一种抗CD47/抗PD-L1抗体,其包括抗CD47抗体或其抗原结合片段和抗PD-L1抗体或其抗原结合片段,其中:
所述抗CD47抗体或其抗原结合片段包含第一重链可变区和第一轻链可变区,其中:
(1)所述第一重链可变区包含H1CDR1、H1CDR2和H1CDR3,其氨基酸序列分别为SEQ IDNO:4、5和6或与SEQ ID NO:4、5和6所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;
(2)所述第一轻链可变区包含L1CDR1、L1CDR2和L1CDR3,其氨基酸序列分别为SEQ IDNO:15、16和17或与SEQ ID NO:15、16和17所示的氨基酸序列具有至少85%序列同一性的氨基酸序列。
2.如权利要求1所述的抗CD47/抗PD-L1抗体,其中所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和第二轻链可变区,其中:
(1)所述第二重链可变区包含选自如下组的H2CDR1、H2CDR2和H2CDR3:
(A1)如SEQ ID NO:75、76和77所示的氨基酸序列;
(A2)如SEQ ID NO:81、82和83所示的氨基酸序列;
(A3)如SEQ ID NO:87、88和89所示的氨基酸序列;和
(A4)如SEQ ID NO:93、94和95所示的氨基酸序列;
(A5)与(A1)、(A2)、(A3)或(A4)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列;和
(2)所述第二轻链可变区包含选自如下组的L2CDR1、L2CDR2和L2CDR3:
(A6)如SEQ ID NO:78、79和80所示的氨基酸序列;
(A7)如SEQ ID NO:84、85和86所示的氨基酸序列;
(A8)如SEQ ID NO:90、91和92所示的氨基酸序列;
(A9)如SEQ ID NO:96、97和98所示的氨基酸序列;
(A10)与(A6)、(A7)、(A8)或(A9)所示的氨基酸序列具有至少85%序列同一性的氨基酸序列。
3.如权利要求2所述的抗CD47/抗PD-L1抗体,其中所述抗PD-L1抗体或其抗原结合片段包含:
所述H2CDR1、H2CDR2和H2CDR3分别为SEQ ID NO:75、76和77或与SEQ ID NO:75、76和77所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二重链可变区,和所述L2CDR1、L2CDR2和L2CDR3分别为SEQ ID NO:78、79和80或与SEQ ID NO:78、79和80所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二轻链可变区;
所述H2CDR1、H2CDR2和H2CDR3分别为SEQ ID NO:87、88和89或与SEQ ID NO:87、88和89所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二重链可变区,和所述L2CDR1、L2CDR2和L2CDR3分别为SEQ ID NO:90、91和92或与SEQ ID NO:90、91和92所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二轻链可变区;
所述H2CDR1、H2CDR2和H2CDR3分别为SEQ ID NO:81、82和83或与SEQ ID NO:81、82和83所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二重链可变区,和所述L2CDR1、L2CDR2和L2CDR3分别为SEQ ID NO:84、85和86或与SEQ ID NO:84、85和86所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二轻链可变区;或者
所述H2CDR1、H2CDR2和H2CDR3分别为SEQ ID NO:93、94和95或与SEQ ID NO:93、94和95所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二重链可变区,和所述L2CDR1、L2CDR2和L2CDR3分别为SEQ ID NO:96、97和98或与SEQ ID NO:96、97和98所示的氨基酸序列具有至少85%序列同一性的氨基酸序列的第二轻链可变区。
4.如权利要求1-3之任一项所述的抗CD47/抗PD-L1抗体,其中:
(1)所述第一重链可变区的氨基酸序列选自:
(b1)如SEQ ID NO:22和SEQ ID NO:30所示的氨基酸序列;
(b2)(b1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的且与(b1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(b3)与(b1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第一轻链可变区的氨基酸序列选自:
(b4)如SEQ ID NO:25和SEQ ID NO:33所示的氨基酸序列;
(b5)(b4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的且与(b4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(b6)与(b4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列。
5.如权利要求1-4之任一项所述的抗CD47/抗PD-L1抗体,其包括抗PD-L1抗体或其抗原结合片段,其中:
所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和第二轻链可变区,其中:
(1)所述第二重链可变区的氨基酸序列选自:
(B1)如SEQ ID NO:99、100、101、102、110、111、112、113、114、119、120、121、122和123所示的氨基酸序列;
(B2)(B1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(B1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(B3)与(B1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第二轻链可变区的氨基酸序列选自:
(B4)如SEQ ID NO:103、104、105、106、115、116、117、118、124、125、126所示的氨基酸序列;
(B5)(B4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的、且与(B4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(B6)与(B4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列。
6.如权利要求1-5之任一项所述的抗CD47/抗PD-L1抗体,其中:
(1)所述第一重链可变区的氨基酸序列选自:
(c1)如SEQ ID NO:30所示的氨基酸序列;
(c2)(c1)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的且与(c1)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(c3)与(c1)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列;和
(2)所述第一轻链可变区的氨基酸序列选自:
(c4)如SEQ ID NO:33所示的氨基酸序列;
(c5)(c4)所示的氨基酸序列经取代、缺失或添加一个或多个氨基酸获得的且与(c4)所示的氨基酸序列功能相同或相似的氨基酸序列;和
(c6)与(c4)所示的氨基酸序列具有至少80%序列同一性的氨基酸序列。
7.如权利要求1-6之任一项所述的抗CD47/抗PD-L1抗体,其包括抗PD-L1抗体或其抗原结合片段,其中:
所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和第二轻链可变区,其中:
所述第二重链可变区的氨基酸序列为SEQ ID NO:110、111、112、113或114所示的氨基酸序列,SEQ ID NO:110、111、112、113或114经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:110、111、112、113或114功能相同的氨基酸序列或与SEQ ID NO:110、111、112、113或114具有至少85%序列同一性的氨基酸序列且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:75、76和77所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ IDNO:115、116、117或118,SEQ ID NO:115、116、117或118经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:115、116、117或118功能相同的氨基酸序列或与SEQ ID NO:115、116、117或118具有至少85%序列同一性的氨基酸序列且所述L2CDR1、L2CDR2和L2CDR3如SEQ ID NO:78、79和80所示的氨基酸序列;或者
所述第二重链可变区的氨基酸序列为SEQ ID NO:119、120、121、122或123所示的氨基酸序列,SEQ ID NO:119、120、121、122或123经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:119、120、121、122或123功能相同的氨基酸序列或与SEQ ID NO:119、120、121、122或123具有至少85%序列同一性的氨基酸序列且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:87、88和89所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ IDNO:124、125或126,SEQ ID NO:124、125或126经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:124、125或126功能相同的氨基酸序列或与SEQ ID NO:124、125或126具有至少85%序列同一性的氨基酸序列且所述L2CDR1、L2CDR2和L2CDR3如SEQ ID NO:90、91和92所示的氨基酸序列。
8.如权利要求1-6之任一项所述的抗CD47/抗PD-L1抗体,其包括抗PD-L1抗体或其抗原结合片段,其中:
所述抗PD-L1抗体或其抗原结合片段包含第二重链可变区和第二轻链可变区,其中:
所述第二重链可变区的氨基酸序列为SEQ ID NO:112所示的氨基酸序列,SEQ ID NO:112经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:112功能相同的氨基酸序列或与SEQ ID NO:112具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:75、76和77所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:116,SEQ ID NO:116经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:116功能相同的氨基酸序列或与SEQ ID NO:116具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ IDNO:78、79和80所示的氨基酸序列;
所述第二重链可变区的氨基酸序列为SEQ ID NO:123所示的氨基酸序列,SEQ ID NO:123经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:123功能相同的氨基酸序列或与SEQ ID NO:123具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:87、88和89所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:126,SEQ ID NO:126经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:126功能相同的氨基酸序列或与SEQ ID NO:126具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ IDNO:90、91和92所示的氨基酸序列;或者
所述第二重链可变区的氨基酸序列为SEQ ID NO:102所示的氨基酸序列,SEQ ID NO:102经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:102功能相同的氨基酸序列或与SEQ ID NO:102具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述H2CDR1、H2CDR2和H2CDR3如SEQ ID NO:93、94和95所示的氨基酸序列,且所述第二轻链可变区的氨基酸序列为SEQ ID NO:106,SEQ ID NO:106经取代、缺失或添加一个或多个氨基酸获得的且与SEQ ID NO:106功能相同的氨基酸序列或与SEQ ID NO:106具有至少85%,或至少90%,或至少95%,或至少98%序列同一性且所述L2CDR1、L2CDR2和L2CDR3如SEQ IDNO:96、97和98所示的氨基酸序列。
9.如权利要求1-8之任一项所述的抗CD47/抗PD-L1抗体,其中所述抗体是人源化抗体或完全人抗体。
10.如权利要求1-9之任一项所述的抗CD47/抗PD-L1抗体,其中所述抗体是双特异性抗体。
11.一种分离的核酸,其编码权利要求1-10之任一项所述的抗CD47/抗PD-L1抗体。
12.如权利要求10所述的核酸,其中:
(1)编码所述第一重链可变区氨基酸序列的核苷酸序列如SEQ ID NO:36所示;
(2)编码所述第一轻链可变区氨基酸序列的核苷酸序列如SEQ ID NO:39所示;
(3)编码所述第二重链可变区氨基酸序列的核苷酸序列如SEQ ID NO:127或SEQ IDNO:128所示;
(4)编码所述第二轻链可变区氨基酸序列的核苷酸序列如SEQ ID NO:129或SEQ IDNO:130所示。
13.一种表达载体,其包含如权利要求11或12所述的核酸。
14.一种宿主细胞,其转化如权利要求13所述的表达载体,所述宿主细胞选自原核细胞和真核细胞,优先为哺乳动物细胞。
15.制备权利要求1-10任一项所述的抗CD47/抗PD-L1抗体的方法,包括在如权利要求14所述的宿主细胞中表达抗体,以及从宿主细胞中分离所述抗体的步骤。
16.一种药物组合物,其包含权利要求1-10之任一项所述的抗CD47/抗PD-L1抗体和药学可接受的载体。
17.如权利要求1-10之任一项所述的抗CD47/抗PD-L1抗体或如权利要求16的药物组合物在制备用于抑制CD47和/或PD-L1活性的药物中的应用,优选所述药物用于治疗血液肿瘤、淋巴瘤、乳腺癌、肺癌、胃癌、肠癌、食管癌、卵巢癌、宫颈癌、肾癌、膀胱癌、胰腺癌、神经胶质瘤和/或黑素瘤。
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CN115785268A (zh) * | 2021-09-13 | 2023-03-14 | 三优生物医药(上海)有限公司 | 抗cd47抗体及其用途 |
WO2023051680A1 (zh) * | 2021-09-30 | 2023-04-06 | 正大天晴药业集团股份有限公司 | 针对免疫检查点的双特异性抗体 |
WO2024022384A1 (en) * | 2022-07-28 | 2024-02-01 | Shenzhen Enduring Biotech , Ltd. | Peg based anti-cd47/anit-pd-l1 bispecific antibody-drug conjugate |
WO2024140863A1 (zh) * | 2022-12-29 | 2024-07-04 | 南京圣和药业股份有限公司 | 靶向crtam和pd-l1的抗体及其应用 |
WO2024140919A1 (zh) * | 2022-12-29 | 2024-07-04 | 南京圣和药业股份有限公司 | 抗crtam/抗pd-l1抗体及其应用 |
WO2024146539A1 (en) * | 2023-01-04 | 2024-07-11 | Wuxi Biologics (Shanghai) Co., Ltd. | Bispecific antibodies against pd-l1 and cd47, method for preparing the same, and use thereof |
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WO1993008829A1 (en) | 1991-11-04 | 1993-05-13 | The Regents Of The University Of California | Compositions that mediate killing of hiv-infected cells |
EP0656064B1 (en) | 1992-08-17 | 1997-03-05 | Genentech, Inc. | Bispecific immunoadhesins |
PT3789038T (pt) | 2010-05-14 | 2023-01-16 | Univ Leland Stanford Junior | Anticorpos monoclonais humanizados e quiméricos para cd47 |
NZ628314A (en) | 2012-02-06 | 2017-01-27 | Inhibrx Lp | Cd47 antibodies and methods of use thereof |
CN107459578B (zh) * | 2016-05-31 | 2021-11-26 | 泰州迈博太科药业有限公司 | 一种靶向cd47与pd-l1的双功能融合蛋白 |
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PL3697819T3 (pl) * | 2017-10-18 | 2023-03-06 | Forty Seven, Inc. | Leczenie nowotworu złośliwego jajnika anty-cd47 i anty-pd-l1 |
CA3084626A1 (en) * | 2017-12-04 | 2019-06-13 | Beijing Hanmi Pharmaceutical Co., Ltd. | Anti-pd-l1/anti-cd47 bispecific antibody with structure like natural antibody and in form of heterodimer and preparation thereof |
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CN115785268A (zh) * | 2021-09-13 | 2023-03-14 | 三优生物医药(上海)有限公司 | 抗cd47抗体及其用途 |
WO2023051680A1 (zh) * | 2021-09-30 | 2023-04-06 | 正大天晴药业集团股份有限公司 | 针对免疫检查点的双特异性抗体 |
WO2024022384A1 (en) * | 2022-07-28 | 2024-02-01 | Shenzhen Enduring Biotech , Ltd. | Peg based anti-cd47/anit-pd-l1 bispecific antibody-drug conjugate |
WO2024140863A1 (zh) * | 2022-12-29 | 2024-07-04 | 南京圣和药业股份有限公司 | 靶向crtam和pd-l1的抗体及其应用 |
WO2024140919A1 (zh) * | 2022-12-29 | 2024-07-04 | 南京圣和药业股份有限公司 | 抗crtam/抗pd-l1抗体及其应用 |
WO2024146539A1 (en) * | 2023-01-04 | 2024-07-11 | Wuxi Biologics (Shanghai) Co., Ltd. | Bispecific antibodies against pd-l1 and cd47, method for preparing the same, and use thereof |
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