CN114853888A - 抗tslp纳米抗体及其应用 - Google Patents
抗tslp纳米抗体及其应用 Download PDFInfo
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- CN114853888A CN114853888A CN202210111727.1A CN202210111727A CN114853888A CN 114853888 A CN114853888 A CN 114853888A CN 202210111727 A CN202210111727 A CN 202210111727A CN 114853888 A CN114853888 A CN 114853888A
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Abstract
本发明提供了抗TSLP纳米抗体及其应用体。本发明提供了一种抗TSLP的纳米抗体,本发明还提供了编码上述纳米抗体的编码序列、相应的表达载体和能够表达该纳米抗体的宿主细胞,以及本发明纳米抗体的生产方法。本发明纳米抗体具有良好的TSLP/TSLPR阻断活性;本发明纳米抗体利用毕赤酵母表达,其发酵罐表达产量可达17‑23g/L。
Description
技术领域
本发明涉及生物医学或生物制药技术领域,更具体地涉及抗TSLP纳米抗体及其应用。
背景技术
近年来,中重度哮喘治疗途径都聚焦于试图控制Th2细胞的响应。用于重度哮喘治疗的抗体药物多为靶向Th2通路中的IgE(奥马珠单抗)、IL5(美泊利单抗、瑞利珠单抗)、IL5R(贝那利珠单抗)、IL4R(杜匹鲁单抗)等。以上药物均对高嗜酸性粒细胞性哮喘具有良好控制效果,均以皮下或是静脉注射方式进行治疗。大约三分之一的严重哮喘患者没有Th2炎症通路激活的特征,目前对于这些非Th2驱动的疾病在既定标准的护理治疗中不能控制的患者没有生物治疗选择,因此亟待开发新的治疗途径。
胸腺基质淋巴生成素(thymic stromal lymphopoietin,TSLP)是具有四螺旋束折叠结构的短链型细胞因子,属于IL-2细胞因子家族成员。TSLP是一种针对促炎性刺激(例如肺内过敏原、病毒及其他病原体)产生的上皮细胞因子,在气道炎症的发生和持续中起着关键作用。TSLP驱动下游Th2细胞因子的释放,包括IL-4、IL-5和IL-13,导致炎症和哮喘症状。TSLP也能激活参与非Th2驱动炎症的多种类型细胞。因此,TSLP在炎症级联反应的早期上游活动已被确定为在广泛哮喘患者群体中的一个潜在靶点。阻断TSLP可阻止免疫细胞释放促炎细胞因子,从而预防哮喘恶化、改善哮喘控制,以及慢阻肺等相关疾病。
纳米抗体(nanobody,Nb),即重链纳米抗体VHH(variable domain of heavychain of heavy-chain antibody)—骆驼体内存在着天然缺失轻链的重链抗体(heavy-chain antibody,HCAb),克隆其可变区而得到的只由一个重链可变区组成的纳米抗体,是目前可以得到的具有完整功能的稳定的可结合抗原的最小单位。纳米抗体具有稳定性高、水溶性好、人源化简单、靶向性高、穿透性强等特点,在免疫实验、诊断与治疗中,发挥着超乎想象的巨大功能。纳米抗体正逐渐成为新一代抗体治疗的新兴力量。
截至目前,尚未有针对TSLP靶点的纳米抗体公开。
因此,本领域迫切需要开发一种具有较好阻断活性,较好的临床药效,并且生产简便的抗TSLP纳米抗体。
发明内容
本发明的目的就是提供一种具有较好阻断活性,较好的临床药效,并且生产简便的抗TSLP纳米抗体。
在本发明的第一方面,提供了一种抗TSLP纳米抗体所述纳米抗体中的VHH链的互补决定区CDR区为选自下组的一种或多种:
(1)SEQ ID NO:1所示的CDR1、SEQ ID NO:2所示的CDR2、和SEQ ID NO:3所示的CDR3;
(2)SEQ ID NO:14所示的CDR1、SEQ ID NO:15所示的CDR2、和SEQ ID NO:16所示的CDR3;和
(3)SEQ ID NO:27所示的CDR1、SEQ ID NO:28所示的CDR2、和SEQ ID NO:29所示的CDR3。
在另一优选例中,所述的CDR1、CDR2和CDR3由VHH链的框架区FR1、FR2、FR3和FR4所隔开。
在另一优选例中,所述VHH链还包括框架区FR,所述的框架区FR为选自下组的一种或多种:
(1)SEQ ID NO:4所示的FR1、SEQ ID NO:5所示的FR2、SEQ ID NO:6所示的FR3、和SEQ ID NO:7所示的FR4;
(2)SEQ ID NO:10所示的FR1、SEQ ID NO:5所示的FR2、SEQ ID NO:6所示的FR3、和SEQ ID NO:11所示的FR4;
(3)SEQ ID NO:17所示的FR1、SEQ ID NO:18所示的FR2、SEQ ID NO:19所示的FR3、和SEQ ID NO:20所示的FR4;
(4)SEQ ID NO:23所示的FR1、SEQ ID NO:18所示的FR2、SEQ ID NO:19所示的FR3、和SEQ ID NO:24所示的FR4;
(5)SEQ ID NO:30所示的FR1、SEQ ID NO:31所示的FR2、SEQ ID NO:32所示的FR3、和SEQ ID NO:33所示的FR4;和
(6)SEQ ID NO:36所示的FR1、SEQ ID NO:31所示的FR2、SEQ ID NO:32所示的FR3、和SEQ ID NO:37所示的FR4。
在另一优选例中,所述的纳米抗体VHH链的CDR区包含与SEQ ID NO:1-3、SEQ IDNO:14-16、SEQ ID NO:27-29中任一具有至少80%、优选地至少90%、更优选地至少95%、甚至更优选地至少99%的序列相似性的氨基酸序列。
在另一优选例中,所述的纳米抗体VHH链CDR区的氨基酸序列与SEQ ID NO:1-3、SEQ ID NO:14-16、SEQ ID NO:27-29中任一相比包含一个或多个氨基酸取代,优选保守氨基酸取代。
在另一优选例中,上述氨基酸序列中任意一种氨基酸序列还包括任选地经过添加、缺失、修饰和/或取代至少一个(如1-3个,较佳地1-2个,更佳地1个)氨基酸并能保留与TSLP特异性结合能力的衍生序列。
在另一优选例中,所述纳米抗体能够特异性结合TSLP。
在另一优选例中,所述纳米抗体能够有效阻断TSLP与TSLPR的相互作用。
在另一优选例中,所述TSLP为人或非人哺乳动物的TSLP。
在另一优选例中,所述TSLP为人、小鼠、大鼠、或非人灵长类动物(如猴)的TSLP。
在另一优选例中,所述的纳米抗体包括人源化抗体、骆驼源抗体、嵌合抗体。
在另一优选例中,所述纳米抗体的VHH链的氨基酸序列选自下组:SEQ ID NO:8、SEQ ID NO:12、SEQ ID NO:21、SEQ ID NO:25、SEQ ID NO:34、SEQ ID NO:38、或其组合。
在另一优选例中,所述抗TSLP纳米抗体包括单体、二价体(二价抗体)、四价体(四价抗体)、和/或多价体(多价抗体)。
在另一优选例中,所述抗TSLP纳米抗体包括一条或多条具有如SEQ ID NO:8、SEQID NO:12、SEQ ID NO:21、SEQ ID NO:25、SEQ ID NO:34或SEQ ID NO:38所示的氨基酸序列的VHH链。
在另一优选例中,所述抗TSLP纳米抗体包括两个具有如SEQ ID NO:8、SEQ ID NO:12、SEQ ID NO:21、SEQ ID NO:25、SEQ ID NO:34、SEQ ID NO:38所示的氨基酸序列的VHH链。
在另一优选例中,所述VHH链之间通过连接肽进行连接。
在另一优选例中,所述连接肽选自以下序列:(GaSb)x,其中a,b,x=0或1或2或3或4或5或6或7或8或9或10(较佳地,a=4而b=1,x=4)。
在另一优选例中,所述连接肽的序列为:GGGGSGGGGSGGGGSGGGGS。
本发明第二方面提供了一种抗TSLP抗体,它是针对TSLP表位的抗体,并且具有本发明第一方面所述的抗TSLP纳米抗体。
在另一优选例中,所述抗TSLP抗体包括一个或多个抗TSLP纳米抗体。
在另一优选例中,所述抗TSLP抗体包括单体、二价体(二价抗体)、四价体(四价抗体)、和/或多价体(多价抗体)。
在另一优选例中,所述抗TSLP抗体包括一条或多条具有如SEQ ID NO:8、SEQ IDNO:12、SEQ ID NO:21、SEQ ID NO:25、SEQ ID NO:34或SEQ ID NO:38所示的氨基酸序列的VHH链。
在另一优选例中,所述抗TSLP抗体包括两条具有如SEQ ID NO:8、SEQ ID NO:12、SEQ ID NO:21、SEQ ID NO:25、SEQ ID NO:34或SEQ ID NO:38所示的氨基酸序列的VHH链。
在另一优选例中,所述的抗体能够特异性结合TSLP。
在另一优选例中,所述的抗体能够特异性针对具有正确空间结构的TSLP蛋白。
在另一优选例中,所述抗体能够有效阻断TSLP与TSLPR的相互作用。
在另一优选例中,所述的抗体对TSLP的亲和力(KD值)小于3.77nM。
在另一优选例中,所述的抗体具有良好的TSLP/TSLPR阻断活性,且阻断活性显著优于对照抗体Tezepelumab,其中,对照抗体Tezepelumab获自阿斯利康(AstraZeneca)或安进(Amgen)公司。
在另一优选例中,所述的抗体能够有效抑制BaF3/TSLPR-IL7R细胞的增殖,其抑制活性优于对照抗体Tezepelumab。
在另一优选例中,所述抗体为纳米抗体。
本发明第三方面提供了一种多核苷酸,所述多核苷酸编码选自下组的蛋白质:本发明第一方面所述的抗TSLP纳米抗体或本发明第二方面所述的抗TSLP抗体。
在另一优选例中,所述多核苷酸为组合形式。
在另一优选例中,所述多核苷酸序列包含SEQ ID NO:9、13、22、26、35或39所示序列中的一种或多种。
在另一优选例中,所述多核苷酸包括RNA、DNA或cDNA。
本发明第四方面提供了一种表达载体,所述表达载体含有本发明第三方面所述的多核苷酸。
在另一优选例中,所述的表达载体选自下组:DNA、RNA、病毒载体、质粒、转座子、其他基因转移系统、或其组合。
在另一优选例中,所述表达载体包括病毒载体,如慢病毒、腺病毒、AAV病毒、逆转录病毒。
本发明第五方面提供了一种宿主细胞,所述宿主细胞含有本发明第四方面所述的表达载体,或其基因组中整合有本发明第三方面所述的多核苷酸。
在另一优选例中,所述的宿主细胞包括原核细胞或真核细胞。
在另一优选例中,所述的宿主细胞选自下组:大肠杆菌、酵母细胞、哺乳动物细胞、噬菌体、或其组合。
在另一优选例中,所述原核细胞选自下组:大肠杆菌、枯草杆菌、乳酸菌、链霉菌、奇异变形菌、或其组合。
在另一优选例中,所述真核细胞选自下组:毕赤酵母、酿酒酵母、裂殖酵母、木霉、或其组合。
在另一优选例中,所述的宿主细胞为毕赤酵母。
本发明第六方面提供了一种产生抗TSLP纳米抗体的方法,包括步骤:
(a)在适合产生纳米抗体的条件下,培养本发明第五方面所述的宿主细胞,从而获得含所述抗TSLP纳米抗体的培养物;
(b)从所述培养物中分离或回收所述的抗TSLP纳米抗体;以及
(c)任选地,纯化和/或修饰得步骤(b)中获得的抗TSLP纳米抗体。
本发明第七方面提供了一种免疫偶联物,该免疫偶联物含有:
(a)本发明第一方面所述的抗TSLP纳米抗体、或本发明第二方面所述的抗TSLP抗体;和
(b)选自下组的偶联部分:可检测标记物、药物、毒素、细胞因子、放射性核素、酶、金纳米颗粒/纳米棒、纳米磁粒、病毒外壳蛋白或VLP、或其组合。
在另一优选例中,所述的放射性核素包括:
(i)诊断用同位素,所述的诊断用同位素选自下组:Tc-99m、Ga-68、F-18、I-123、I-125、I-131、In-111、Ga-67、Cu-64、Zr-89、C-11、Lu-177、Re-188、或其组合;和/或
(ii)治疗用同位素,所述的治疗用同位素选自下组:Lu-177、Y-90、Ac-225、As-211、Bi-212、Bi-213、Cs-137、Cr-51、Co-60、Dy-165、Er-169、Fm-255、Au-198、Ho-166、I-125、I-131、Ir-192、Fe-59、Pb-212、Mo-99、Pd-103、P-32、K-42、Re-186、Re-188、Sm-153、Ra223、Ru-106、Na24、Sr89、Tb-149、Th-227、Xe-133、Yb-169、Yb-177、或其组合。
在另一优选例中,所述偶联部分为药物或毒素。
在另一优选例中,所述的药物为细胞毒性药物。
在另一优选例中,所述的细胞毒性药物选自下组:抗微管蛋白药物、DNA小沟结合试剂、DNA复制抑制剂、烷化试剂、抗生素、叶酸拮抗物、抗代谢药物、化疗增敏剂、拓扑异构酶抑制剂、长春花生物碱、或其组合。
在另一优选例中,特别有用的细胞毒性药物的例子包括,例如,DNA小沟结合试剂、DNA烷基化试剂、和微管蛋白抑制剂、典型的细胞毒性药物包括、例如奥瑞他汀(auristatins)、喜树碱(camptothecins)、多卡霉素/倍癌霉素(duocarmycins)、依托泊甙(etoposides)、美登木素(maytansines)和美登素类化合物(maytansinoids)(例如DM1和DM4)、紫杉烷(taxanes)、苯二氮卓类(benzodiazepines)或者含有苯二氮卓的药物(benzodiazepine containing drugs)(例如吡咯并[1,4]苯二氮卓类(PBDs),吲哚啉苯并二氮卓类(indolinobenzodiazepines)和噁唑烷并苯并二氮卓类(oxazolidinobenzodiazepines))、长春花生物碱(vinca alkaloids)、或其组合。
在另一优选例中,所述的毒素选自下组:耳他汀类(例如,耳他汀E、耳他汀F、MMAE和MMAF)、金霉素、类美坦西醇、篦麻毒素、篦麻毒素A-链、考布他汀、多卡米星、多拉司他汀、阿霉素、柔红霉素、紫杉醇、顺铂、cc1065、溴化乙锭、丝裂霉素、依托泊甙、替诺泊甙(tenoposide)、长春新碱、长春碱、秋水仙素、二羟基炭疽菌素二酮、放线菌素、白喉毒素、假单胞菌外毒素(PE)A、PE40、相思豆毒素、相思豆毒素A链、蒴莲根毒素A链、α-八叠球菌、白树毒素、迈托毒素(mitogellin)、局限曲菌素(retstrictocin)、酚霉素、依诺霉素、麻疯树毒蛋白(curicin)、巴豆毒素、卡奇霉素、肥皂草(Sapaonaria officinalis)抑制剂、糖皮质激素、或其组合。
在另一优选例中,所述偶联部分为可检测标记物。
在另一优选例中,所述偶联部分选自下组:荧光或发光标记物、放射性标记物、MRI(磁共振成像)或CT(电子计算机X射线断层扫描技术)造影剂、或能够产生可检测产物的酶、放射性核素、生物毒素、细胞因子(如IL-2等)、抗体、抗体Fc片段、抗体scFv片段、金纳米颗粒/纳米棒、病毒颗粒、脂质体、纳米磁粒、前药激活酶(例如,DT-心肌黄酶(DTD)或联苯基水解酶-样蛋白质(BPHL))或任何形式的纳米颗粒。
本发明第八方面提供了一种多特异性抗体,所述的多特异性抗体包含:本发明第一方面所述的抗TSLP纳米抗体,或本发明第二方面所述的抗TSLP抗体。
在另一优选例中,所述多特异性抗体还包含抗体的Fc段。
本发明第九方面提供了一种重组蛋白,所述的重组蛋白具有:
(i)如本发明第一方面所述的抗TSLP纳米抗体、或如本发明第二方面所述的抗TSLP抗体;以及
(ii)任选的协助表达和/或纯化的标签序列。
在另一优选例中,所述的标签序列包括Fc标签、HA标签和6His标签。
在另一优选例中,所述的重组蛋白特异性结合于TSLP蛋白。
本发明第十方面提供了一种药物组合物,所述药物组合物含有:
(i)本发明第一方面所述的抗TSLP纳米抗体、或本发明第二方面所述的抗TSLP抗体、或本发明第七方面所述的免疫偶联物或本发明第八方面所述的多特异性抗体或本发明第九方面所述的重组蛋白;以及
(ii)药学上可接受的载体。
在另一优选例中,所述的免疫偶联物的偶联部分为药物、毒素、和/或治疗用同位素。
在另一优选例中,所述的药物组合物中还含有其他的治疗免疫系统疾病或肿瘤疾病的药物。
在另一优选例中,所述其他的治疗免疫系统疾病或肿瘤疾病的药物选自下组:布地奈德、氟替卡松、倍氯米松、糠酸莫米松、沙丁胺醇、茶碱、福莫特罗、噻托溴铵、柳氮磺胺吡啶、甲氨蝶呤、环磷酰胺、氟尿嘧啶、博来霉素、阿那曲唑、或其组合。
在另一优选例中,所述的药物组合物用于制备预防和/或治疗与TSLP相关的疾病或病症的药物。
在另一优选例中,所述与TSLP相关的疾病或病症包括免疫系统疾病或肿瘤疾病。
在另一优选例中,所述免疫系统疾病选自下组:哮喘、特应性皮炎、慢性阻塞性肺疾病(COPD)、过敏性结膜炎、食物过敏、溃疡性结肠炎、克罗恩病、鼻炎、强直性脊柱炎、系统性红斑狼疮、类风湿性关节炎、过敏性肺炎、变应性肉芽肿性血管炎、鼻息肉病、或其组合。
在另一优选例中,所述肿瘤疾病选自下组:乳腺癌、胰腺癌、宫颈癌、多发性骨髓瘤、结直肠癌、肺癌、甲状腺癌、卵巢癌、肝癌、或其组合。
本发明第十一方面提供了本发明第一方面所述的抗TSLP纳米抗体、本发明第二方面所述的抗TSLP抗体、如本发明第七方面所述的免疫偶联物或本发明第八方面所述的多特异性抗体或本发明第九方面所述的重组蛋白或本发明第十方面所述的药物组合物的用途,(a)用于制备预防和/或治疗与TSLP相关的疾病的药物;和/或(b)用于制备检测TSLP的试剂、检测板或试剂盒。
在另一优选例中,所述与TSLP相关的疾病或病症包括免疫系统疾病或肿瘤疾病。
在另一优选例中,所述免疫系统疾病选自下组:哮喘、特应性皮炎、慢性阻塞性肺疾病(COPD)、过敏性结膜炎、食物过敏、溃疡性结肠炎、克罗恩病、鼻炎、强直性脊柱炎、系统性红斑狼疮、类风湿性关节炎、过敏性肺炎、变应性肉芽肿性血管炎、鼻息肉病、或其组合。
在另一优选例中,所述肿瘤疾病选自下组:乳腺癌、胰腺癌、宫颈癌、多发性骨髓瘤、结直肠癌、肺癌、甲状腺癌、卵巢癌、肝癌、或其组合。
在另一优选例中,所述TSLP为人TSLP。
在另一优选例中,所示试剂为诊断试剂。
在另一优选例中,所示诊断试剂为造影剂
在另一优选例中,所述试剂用于检测样品中的TSLP蛋白或其片段。
在另一优选例中,所述的检测包括流式检测、细胞免疫荧光检测。
在另一优选例中,所述用途为诊断性和/或非诊断性的,和/或治疗性和/或非治疗性的。
本发明第十二方面提供了一种检测样品中TSLP蛋白的方法,所述方法包括步骤:
(1)将样品与本发明第一方面所述的抗TSLP纳米抗体、或如本发明第二方面所述的抗TSLP抗体、或本发明第七方面所述的免疫偶联物或本发明第八方面所述的多特异性抗体或本发明第九方面所述的重组蛋白接触;
(2)检测是否形成抗原-抗体复合物,其中形成复合物就表示样品中存在TSLP蛋白。
在另一优选例中,所述方法为非诊断和非治疗性的方法。
本发明第十三方面提供了一种TSLP蛋白检测试剂,所述的检测试剂包含:
(i)本发明第一方面所述的抗TSLP纳米抗体、或如本发明第二方面所述的抗TSLP抗体、或本发明第七方面所述的免疫偶联物或本发明第八方面所述的多特异性抗体或本发明第九方面所述的重组蛋白;以及
(ii)检测学上可接受的载体。
在另一优选例中,所述的免疫偶联物的偶联部分为诊断用同位素。
在另一优选例中,所述的检测学上可接受的载体为无毒的、惰性的水性载体介质。
在另一优选例中,所述的检测试剂为选自下组的一种或多种试剂:同位素示踪剂、造影剂、流式检测试剂、细胞免疫荧光检测试剂、纳米磁粒和显像剂。
在另一优选例中,所述的检测试剂用于体内检测。
在另一优选例中,所述的检测试剂的剂型为液态或粉状(如水剂,针剂,冻干粉,片剂,含服剂,吸雾剂)。
本发明第十四方面提供了一种检测TSLP蛋白的试剂盒,所述试剂盒含有本发明第七方面所述的免疫偶联物或本发明第十三方面所述的检测试剂,以及说明书。
在另一优选例中,所述的说明书记载,所述的试剂盒用于非侵入性地检测待测对象的TSLP表达。
本发明第十五方面提供了一种本发明第七方面所述的免疫偶联物的用途,用于制备体内检测TSLP蛋白的造影剂。
在另一优选例中,所述检测用于与TSLP相关的疾病或病症的诊断或预后。
本发明第十六方面提供了一种治疗疾病的方法,所述方法包括,给需要的对象施用本发明第一方面所述的抗TSLP纳米抗体、本发明第二方面所述的抗TSLP抗体、如本发明第七方面所述的免疫偶联物或本发明第八方面所述的多特异性抗体或本发明第九方面所述的重组蛋白或本发明第十方面所述的药物组合物。
在另一优选例中,所述的对象包括人或非人哺乳动物。
在另一优选例中,所述非人哺乳动物包括啮齿动物(如鼠、兔)、非人灵长类动物(如猴)。
应理解,在本发明范围内中,本发明的上述各技术特征和在下文(如实施例)中具体描述的各技术特征之间都可以互相组合,从而构成新的或优选的技术方案。限于篇幅,在此不再一一累述。
附图说明
图1A和图1B是31株候选抗体进行流式细胞术阻断活性检测的结果。结果表明:31株候选抗体中的14株抗体的阻断活性显著优于对照抗体Tezepelumab。
图2是14株阻断型TSLP纳米抗体的结合动力学检测结果。
图3是二价单域抗体Bi-HuNb5-31、Bi-HuNb7-54、Bi-HuNb10-63在毕赤酵母中的摇瓶表达上清SDS-PAGE结果,其产量分别为475ug/mL、310ug/mL、510ug/mL。
图4是ELISA检测人源化二价抗体阻断活性的结果。结果表明,三株人源化二价抗体的阻断活性显著优于对照抗体Tezepelumab。
图5是人源化二价抗体对BaF3/TSLPR-IL7R细胞的增殖抑制作用的结果。结果表明,其中两株人源化抗体对BaF3/TSLPR-IL7R细胞中pSTAT5信号通路的抑制作用优于对照抗体Tezepelumab。
具体实施方式
首次意外地发现一类抗TSLP纳米抗体,实验结果表明,本发明的纳米抗体能够有效阻断TSLP与TSLPR的相互作用,且阻断活性显著优于对照抗体Tezepelumab;本发明的纳米抗体能够有效抑制Baf3/TSLPR-IL7R细胞的增殖,其抑制活性优于对照抗体Tezepelumab;本发明纳米抗体在毕赤酵母中的发酵罐表达产量可达17-23g/L,显著高于行业水平。在此基础上,本发明人完成了本发明。
术语
如本文所用,术语“本发明纳米抗体”、“本发明的纳米抗体”、“本发明的抗TSLP纳米抗体”、“本发明TSLP纳米抗体”、“抗TSLP纳米抗体”、“TSLP纳米抗体”具有相同的含义,可互换使用,均指特异性识别和结合于TSLP(包括人TSLP)的纳米抗体。
如本文所用,术语“抗体”或“免疫球蛋白”是有相同结构特征的约150000道尔顿的异四聚糖蛋白,其由两个相同的轻链(L)和两个相同的重链(H)组成。每条轻链通过一个共价二硫键与重链相连,而不同免疫球蛋白同种型的重链间的二硫键数目不同。每条重链和轻链也有规则间隔的链内二硫键。每条重链的一端有可变区(VH),其后是多个恒定区。每条轻链的一端有可变区(VL),另一端有恒定区;轻链的恒定区与重链的第一个恒定区相对,轻链的可变区与重链的可变区相对。特殊的氨基酸残基在轻链和重链的可变区之间形成界面。
如本文所用,术语“单域”、“VHH”、“纳米抗体(nanobody)”、“重链抗体”(singledomain antibody,sdAb,或纳米抗体nanobody)具有相同的含义并可互换使用,指克隆抗体重链的可变区,构建仅由一个重链可变区组成的纳米抗体(VHH),它是具有完整功能的最小的抗原结合片段。通常先获得天然缺失轻链和重链恒定区1(CH1)的抗体后,再克隆抗体重链的可变区,构建仅由一个重链可变区组成的纳米抗体(VHH)。
如本文所用,术语“可变”表示抗体中可变区的某些部分在序列上有所不同,它形成了各种特定抗体对其特定抗原的结合和特异性。然而,可变性并不均匀地分布在整个抗体可变区中。它集中于轻链和重链可变区中称为互补决定区(CDR)或超变区中的三个片段中。可变区中较保守的部分称为构架区(FR)。天然重链和轻链的可变区中各自包含四个FR区,它们大致上呈b-折叠构型,由形成连接环的三个CDR相连,在某些情况下可形成部分b折叠结构。每条链中的CDR通过FR区紧密地靠在一起并与另一链的CDR一起形成了抗体的抗原结合部位(参见Kabat等,NIH Publ.No.91-3242,卷I,647-669页(1991))。恒定区不直接参与抗体与抗原的结合,但是它们表现出不同的效应功能,例如参与抗体的依赖于抗体的细胞毒性。
如本领域技术人员所知,免疫偶联物及融合表达产物包括:药物、毒素、细胞因子(cytokine)、放射性核素、酶和其他诊断或治疗分子与本发明的抗体或其片段结合而形成的偶联物。本发明还包括与所述的抗TSLP抗体或其片段结合的细胞表面标记物或抗原。
如本文所用,术语“重链可变区”与“VH”可互换使用。
如本文所用,术语“可变区”与“互补决定区(complementarity determiningregion,CDR)”可互换使用。
在本发明的一个优选的实施方式中,所述抗体的重链可变区包括包括三个互补决定区CDR1、CDR2、和CDR3。
在本发明的一个优选的实施方式中,所述抗体的重链包括上述重链可变区和重链恒定区。
在本发明中,术语“本发明抗体”、“本发明蛋白”、或“本发明多肽”可互换使用,都指特异性结合TSLP蛋白的多肽,例如具有重链可变区的蛋白或多肽。它们可含有或不含起始甲硫氨酸。
本发明还提供了具有本发明抗体的其他蛋白质或融合表达产物。具体地,本发明包括具有含可变区的重链的任何蛋白质或蛋白质偶联物及融合表达产物(即免疫偶联物及融合表达产物),只要该可变区与本发明抗体的重链可变区相同或至少90%同源性,较佳地至少95%同源性。
一般,抗体的抗原结合特性可由位于重链可变区的3个特定的区域来描述,称为可变区域(CDR),将该段间隔成4个框架区域(FR),4个FR的氨基酸序列相对比较保守,不直接参与结合反应。这些CDR形成环状结构,通过其间的FR形成的β折叠在空间结构上相互靠近,重链上的CDR和相应轻链上的CDR构成了抗体的抗原结合位点。可以通过比较同类型的抗体的氨基酸序列来确定是哪些氨基酸构成了FR或CDR区域。
本发明抗体的重链的可变区特别令人感兴趣,因为它们中至少部分涉及结合抗原。因此,本发明包括那些具有带CDR的抗体重链可变区的分子,只要其CDR与此处鉴定的CDR具有90%以上(较佳地95%以上,最佳地98%以上)的同源性。
本发明不仅包括完整的抗体,还包括具有免疫活性的抗体的片段或抗体与其他序列形成的融合蛋白。因此,本发明还包括所述抗体的片段、衍生物和类似物。
如本文所用,术语“片段”、“衍生物”和“类似物”是指基本上保持本发明抗体相同的生物学功能或活性的多肽。本发明的多肽片段、衍生物或类似物可以是(i)有一个或多个保守或非保守性氨基酸残基(优选保守性氨基酸残基)被取代的多肽,而这样的取代的氨基酸残基可以是也可以不是由遗传密码编码的,或(ii)在一个或多个氨基酸残基中具有取代基团的多肽,或(iii)成熟多肽与另一个化合物(比如延长多肽半衰期的化合物,例如聚乙二醇)融合所形成的多肽,或(iv)附加的氨基酸序列融合到此多肽序列而形成的多肽(如前导序列或分泌序列或用来纯化此多肽的序列或蛋白原序列,或与6His标签形成的融合蛋白)。根据本文的教导,这些片段、衍生物和类似物属于本领域熟练技术人员公知的范围。
本发明抗体指具有TSLP结合活性的、包括上述CDR区的多肽。该术语还包括具有与本发明抗体相同功能的、包含上述CDR区的多肽的变异形式。这些变异形式包括(但并不限于):一个或多个(通常为1-50个,较佳地1-30个,更佳地1-20个,最佳地1-10个)氨基酸的缺失、插入和/或取代,以及在C末端和/或N末端添加一个或数个(通常为20个以内,较佳地为10个以内,更佳地为5个以内)氨基酸。例如,在本领域中,用性能相近或相似的氨基酸进行取代时,通常不会改变蛋白质的功能。又比如,在C末端和/或N末端添加一个或数个氨基酸通常也不会改变蛋白质的功能。该术语还包括本发明抗体的活性片段和活性衍生物。
该多肽的变异形式包括:同源序列、保守性变异体、等位变异体、天然突变体、诱导突变体、在高或低的严紧度条件下能与本发明抗体的编码DNA杂交的DNA所编码的蛋白、以及利用抗本发明抗体的抗血清获得的多肽或蛋白。
本发明还提供了其他多肽,如包含纳米抗体或其片段的融合蛋白。除了几乎全长的多肽外,本发明还包括了本发明纳米抗体的片段。通常,该片段具有本发明抗体的至少约50个连续氨基酸,较佳地至少约50个连续氨基酸,更佳地至少约80个连续氨基酸,最佳地至少约100个连续氨基酸。
在本发明中,“本发明抗体的保守性变异体”指与本发明抗体的氨基酸序列相比,有至多10个,较佳地至多8个,更佳地至多5个,最佳地至多3个氨基酸被性质相似或相近的氨基酸所替换而形成多肽。这些保守性变异多肽最好根据表A进行氨基酸替换而产生。
表A
最初的残基 | 代表性的取代 | 优选的取代 |
Ala(A) | Val;Leu;Ile | Val |
Arg(R) | Lys;Gln;Asn | Lys |
Asn(N) | Gln;His;Lys;Arg | Gln |
Asp(D) | Glu | Glu |
Cys(C) | Ser | Ser |
Gln(Q) | Asn | Asn |
Glu(E) | Asp | Asp |
Gly(G) | Pro;Ala | Ala |
His(H) | Asn;Gln;Lys;Arg | Arg |
Ile(I) | Leu;Val;Met;Ala;Phe | Leu |
Leu(L) | Ile;Val;Met;Ala;Phe | Ile |
Lys(K) | Arg;Gln;Asn | Arg |
Met(M) | Leu;Phe;Ile | Leu |
Phe(F) | Leu;Val;Ile;Ala;Tyr | Leu |
Pro(P) | Ala | Ala |
Ser(S) | Thr | Thr |
Thr(T) | Ser | Ser |
Trp(W) | Tyr;Phe | Tyr |
Tyr(Y) | Trp;Phe;Thr;Ser | Phe |
Val(V) | Ile;Leu;Met;Phe;Ala | Leu |
本发明还提供了编码上述抗体或其片段或其融合蛋白的多核苷酸分子。本发明的多核苷酸可以是DNA形式或RNA形式。DNA形式包括cDNA、基因组DNA或人工合成的DNA。DNA可以是单链的或是双链的。DNA可以是编码链或非编码链。
编码本发明的成熟多肽的多核苷酸包括:只编码成熟多肽的编码序列;成熟多肽的编码序列和各种附加编码序列;成熟多肽的编码序列(和任选的附加编码序列)以及非编码序列。
术语“编码多肽的多核苷酸”可以是包括编码此多肽的多核苷酸,也可以是还包括附加编码和/或非编码序列的多核苷酸。
本发明还涉及与上述的序列杂交且两个序列之间具有至少50%,较佳地至少70%,更佳地至少80%相同性的多核苷酸。本发明特别涉及在严格条件下与本发明所述多核苷酸可杂交的多核苷酸。在本发明中,“严格条件”是指:(1)在较低离子强度和较高温度下的杂交和洗脱,如0.2×SSC,0.1%SDS,60℃;或(2)杂交时加有变性剂,如50%(v/v)甲酰胺,0.1%小牛血清/0.1%Ficoll,42℃等;或(3)仅在两条序列之间的相同性至少在90%以上,更好是95%以上时才发生杂交。并且,可杂交的多核苷酸编码的多肽与成熟多肽有相同的生物学功能和活性。
本发明的抗体的核苷酸全长序列或其片段通常可以用PCR扩增法、重组法或人工合成的方法获得。一种可行的方法是用人工合成的方法来合成有关序列,尤其是片段长度较短时。通常,通过先合成多个小片段,然后再进行连接可获得序列很长的片段。此外,还可将重链的编码序列和表达标签(如6His)融合在一起,形成融合蛋白。
一旦获得了有关的序列,就可以用重组法来大批量地获得有关序列。这通常是将其克隆入载体,再转入细胞,然后通过常规方法从增殖后的宿主细胞中分离得到有关序列。本发明所涉及的生物分子(核酸、蛋白等)包括以分离的形式存在的生物分子。
目前,已经可以完全通过化学合成来得到编码本发明蛋白(或其片段,或其衍生物)的DNA序列。然后可将该DNA序列引入本领域中已知的各种现有的DNA分子(或如载体)和细胞中。此外,还可通过化学合成将突变引入本发明蛋白序列中。
本发明还涉及包含上述的适当DNA序列以及适当启动子或者控制序列的载体。这些载体可以用于转化适当的宿主细胞,以使其能够表达蛋白质。
宿主细胞可以是原核细胞,如细菌细胞;或是低等真核细胞,如酵母细胞;或是高等真核细胞,如哺乳动物细胞。代表性例子有:大肠杆菌,链霉菌属;鼠伤寒沙门氏菌的细菌细胞;真菌细胞如酵母;果蝇S2或Sf9的昆虫细胞;CHO、COS7、293细胞的动物细胞等。
用重组DNA转化宿主细胞可用本领域技术人员熟知的常规技术进行。当宿主为原核生物如大肠杆菌时,能吸收DNA的感受态细胞可在指数生长期后收获,用CaCl2法处理,所用的步骤在本领域众所周知。另一种方法是使用MgCl2。如果需要,转化也可用电穿孔的方法进行。当宿主是真核生物,可选用如下的DNA转染方法:磷酸钙共沉淀法,常规机械方法如显微注射、电穿孔,脂质体包装等。
获得的转化子可以用常规方法培养,表达本发明的基因所编码的多肽。根据所用的宿主细胞,培养中所用的培养基可选自各种常规培养基。在适于宿主细胞生长的条件下进行培养。当宿主细胞生长到适当的细胞密度后,用合适的方法(如温度转换或化学诱导)诱导选择的启动子,将细胞再培养一段时间。
在上面的方法中的重组多肽可在细胞内、或在细胞膜上表达、或分泌到细胞外。如果需要,可利用其物理的、化学的和其它特性通过各种分离方法分离和纯化重组的蛋白。这些方法是本领域技术人员所熟知的。这些方法的例子包括但并不限于:常规的复性处理、用蛋白沉淀剂处理(盐析方法)、离心、渗透破菌、超处理、超离心、分子筛层析(凝胶过滤)、吸附层析、离子交换层析、高效液相层析(HPLC)和其它各种液相层析技术及这些方法的结合。
本发明的抗体可以单独使用,也可与可检测标记物(为诊断目的)、治疗剂、PK(蛋白激酶)修饰部分或任何以上这些物质的组合结合或偶联。
用于诊断目的可检测标记物包括但不限于:荧光或发光标记物、放射性标记物、MRI(磁共振成像)或CT(电子计算机X射线断层扫描技术)造影剂、或能够产生可检测产物的酶。
可与本发明抗体结合或偶联的治疗剂包括但不限于:1.放射性核素;2.生物毒;3.细胞因子如IL-2等;4.金纳米颗粒/纳米棒;5.病毒颗粒;6.脂质体;7.纳米磁粒;8.前药激活酶(例如,DT-心肌黄酶(DTD)或联苯基水解酶-样蛋白质(BPHL))等。
胸腺基质淋巴生成素(thymic stromal lymphopoietin,TSLP)
胸腺基质淋巴生成素是具有四螺旋束折叠结构的短链型细胞因子,属于IL-2细胞因子家族成员。作为一种新型细胞因子,TSLP通常在肺、皮肤和肠道屏障表面的上皮细胞中表达。动物实验表明TSLP在过敏原诱导的哮喘模型小鼠肺中高表达,而TSLP受体缺陷小鼠哮喘表现明显减轻,肺脏特异性TSLP转基因小鼠表现出以Th2型炎症以及IgE增高的气道炎症和高反应性。进一步研究提示,TSLP激活骨髓来源的树突状细胞并上调共刺激分子,产生Th2型细胞趋化因子CCL17。因此,TSLP是启动气道过敏性炎症的重要因子和必要条件。它是包括哮喘在内的各种疾病中多种炎症途径的上游调节子,对气道炎症的发生和持续进行至关重要。另外,研究表明,TSLP也是一种与特应性皮炎(AD)发病机理有关的细胞因子。更重要的是,已有研究人员发现在许可不同类型肿瘤中,TSLP水平会升高,TSLP又能够诱导肿瘤细胞表达另一种称为BCL-2的蛋白质,这种蛋白质可以保护肿瘤免受死亡。因此TSLP对于肿瘤的存活也是至关重要的。
胸腺基质淋巴生成素受体(thymic stromal lymphopoietin receptor,TSLPR)
TSLPR受体为I型跨膜蛋白质,属于造血细胞因子受体家族成员。功能性TSLPR复合物是由TSLPR和IL-7Ra组成。TSLPR也称为细胞因子受体样分子2或I型细胞因子受体σ1。TSLP通过结合其高亲和力异二聚体受体复合物启动细胞内2型信号传导,异二聚体受体复合物由其特异性受体TSLPR组成,其与IL-2、IL-4、IL-9和IL-15中的共同受体γ链具有24%的同源性,并且不包含δ-共同链IL-2家族,以及共同表达TSLPR和IL-7Rα的细胞中的IL-7Rα亚单位(CD127)。TSLP最初与TSLPR结合,随后招募IL-7Rα链。
药物组合物
本发明还提供了一种组合物。优选地,所述的组合物是药物组合物,它含有上述的抗体或其活性片段或其融合蛋白,以及药学上可接受的载体。通常,可将这些物质配制于无毒的、惰性的和药学上可接受的水性载体介质中,其中pH通常约为5-8,较佳地pH约为6-8,尽管pH值可随被配制物质的性质以及待治疗的病症而有所变化。配制好的药物组合物可以通过常规途径进行给药,其中包括(但并不限于):腹膜内、静脉内、或局部给药。
本发明的药物组合物可直接用于结合TSLP蛋白分子,因而可用于治疗与TSLP相关的疾病或病症(包括免疫系统疾病或肿瘤疾病)。此外,还可同时使用其他治疗剂。
本发明的药物组合物含有安全有效量(如0.001-99wt%,较佳地0.01-90wt%,更佳地0.1-80wt%)的本发明上述的纳米抗体(或其偶联物)以及药学上可接受的载体或赋形剂。这类载体包括(但并不限于):盐水、缓冲液、葡萄糖、水、甘油、乙醇、及其组合。药物制剂应与给药方式相匹配。本发明的药物组合物可以被制成针剂形式,例如用生理盐水或含有葡萄糖和其他辅剂的水溶液通过常规方法进行制备。药物组合物如针剂、溶液宜在无菌条件下制造。活性成分的给药量是治疗有效量,例如每天约10微克/千克体重-约50毫克/千克体重。此外,本发明的多肽还可与其他治疗剂一起使用。
使用药物组合物时,是将安全有效量的免疫偶联物施用于哺乳动物,其中该安全有效量通常至少约10微克/千克体重,而且在大多数情况下不超过约50毫克/千克体重,较佳地该剂量是约10微克/千克体重-约10毫克/千克体重。当然,具体剂量还应考虑给药途径、病人健康状况等因素,这些都是熟练医师技能范围之内的。
抗TSLP纳米抗体
本发明中,所述抗TSLP纳米抗体的VHH链的氨基酸序列选自SEQ ID NO:8、SEQ IDNO:12、SEQ ID NO:21、SEQ ID NO:25、SEQ ID NO:34或SEQ ID NO:38中的一种或多种。
在本发明的一个优选例中,所述抗TSLP纳米抗体包括单体、二价体(二价抗体)、四价体(四价抗体)、和/或多价体(多价抗体)。
典型的,所述抗TSLP纳米抗体包括两条具有如SEQ ID NO:8、SEQ ID NO:12、SEQID NO:21、SEQ ID NO:25、SEQ ID NO:34或SEQ ID NO:38中所示的氨基酸序列的VHH链。
在另一优选例中,所述VHH链之间通过连接肽进行连接。
在另一优选例中,所述连接肽选自以下序列:(GaSb)x,其中a,b,x=0或1或2或3或4或5或6或7或8或9或10(较佳地,a=4而b=1,x=4)。
在另一优选例中,所述连接肽的序列为GGGGSGGGGSGGGGSGGGGS。
标记的纳米抗体
在本发明的一个优选例中,所述纳米抗体带有可检测标记物。更佳地,所述的标记物选自下组:同位素、胶体金标记物、有色标记物或荧光标记物。
胶体金标记可采用本领域技术人员已知的方法进行。在本发明的一个优选的方案中,TSLP的纳米抗体用胶体金标记,得到胶体金标记的纳米抗体。
检测方法
本发明还涉及检测TSLP蛋白的方法。该方法步骤大致如下:获得细胞和/或组织样本;将样本溶解在介质中;检测在所述溶解的样本中TSLP蛋白的水平。
在本发明的检测方法中,所使用的样本没有特别限制,代表性的例子是存在于细胞保存液中的含细胞的样本。
试剂盒
本发明还提供了一种含有本发明的抗体(或其片段)或检测板的试剂盒,在本发明的一个优选例中,所述的试剂盒还包括容器、使用说明书、缓冲剂等。
本发明还提供了用于检测TSLP水平的检测试剂盒,该试剂盒包括识别TSLP蛋白的抗体,用于溶解样本的裂解介质,检测所需的通用试剂和缓冲液,如各种缓冲液、检测标记、检测底物等。该检测试剂盒可以是体外诊断装置。
应用
如上所述,本发明的纳米抗体有广泛生物应用价值和临床应用价值,其应用涉及到与TSLP相关的疾病或病症的诊断和治疗、基础医学研究、生物学研究等多个领域。一个优选的应用是用于针对TSLP的临床诊断和靶向治疗。
本发明的主要优点包括:
(a)本发明的纳米抗体能够有效阻断TSLP与TSLPR的相互作用。
(b)本发明的纳米抗体相较于对照抗体Tezepelumab具有更强的阻断活性。
(c)本发明的纳米抗体可在毕赤酵母中表达,摇瓶表达产量较高,且发酵罐产量可达17-23g/L。
(d)本发明的纳米抗体对BaF3/TSLPR-IL7R细胞中pSTAT5信号通路的抑制作用显著优于对照抗体Tezepelumab。
下面结合具体实施例,进一步阐述本发明。应理解,这些实施例仅用于说明本发明而不用于限制本发明的范围。下列实施例中未注明具体条件的实验方法,通常按照常规条件,例如Sambrook等人,分子克隆:实验室手册(New York:Cold Spring HarborLaboratory Press,1989)中所述的条件,或按照制造厂商所建议的条件。除非另外说明,否则百分比和份数是重量百分比和重量份数。
除非特别说明,否则本发明实施例中所用材料和试剂均为市售产品。
实施例1TSLP特异性纳米抗体筛选
将弗林位点突变的人TSLP氨基酸序列按照人密码子优化后,将其碱基序列克隆至pFUSE载体上,转染HEK293F细胞后纯化出人TSLP蛋白。将高纯度的蛋白与免疫佐剂混合后分别免疫四只新疆双峰驼,每周一次,七次免疫后取骆驼外周血,分离RNA并扩增VHH基因片段,随后将其克隆至pMECS载体,电转化至TG1感受态细胞中建立高质量噬菌体展示纳米抗体文库。经检测,四个文库的库容均达到1x109CFU以上,片段插入率在80%以上。
利用噬菌体展示技术筛选TSLP特异性纳米抗体。经过三轮“吸附-洗涤-富集”的过程,各文库均出现特异性纳米抗体噬菌体富集。从中随机挑选1200个克隆进行ELISA检测及测序分析,最终获得312株差异序列抗体。
实施例2流式细胞术筛选阻断型TSLP纳米抗体
将以上序列不同的纳米抗体克隆接种于TB培养基中培养并用IPTG诱导过夜,裂解细胞收集上清用于阻断活性检测。将培养好的CHOZEN/TSLPR稳转细胞分装至96孔板中,每孔3E5个细胞,3000rpm离心3min去掉上清液,加入各抗体的裂解液及TSLP-Biotin蛋白孵育20min。离心弃上清,加入稀释的SA-PE抗体,4℃孵育20min。再次离心弃上清,每孔加入200uL PBS重悬细胞,流式细胞仪检测样本PE信号。结果表明:共有64株候选抗体具有阻断TSLP与TSLPR相互作用的功能。结合序列分析,挑选出31株不同家族的抗体进行表达纯化。纯化方法参见专利CN110144011A中实施例4。
将以上31株纯化的抗体再次进行流式细胞术阻断活性检测。将培养好的HEK293F/TSLPR瞬转细胞分装至96孔板中,每孔3E5个细胞,3000rpm离心3min去掉上清液,加入梯度稀释好的各抗体(从20ug/mL开始2倍梯度稀释)及TSLP-Biotin蛋白孵育20min。本次实验以Tezepelumab为对照抗体。随后离心弃上清,加入稀释的SA-PE抗体,4℃孵育20min。再次离心弃上清,每孔加入200uL PBS重悬细胞,流式细胞仪检测样本PE信号。结果如图1A和1B所示,其中14株抗体的阻断活性显著优于对照抗体Tezepelumab,14株抗体的编号分别为Nb1-41、Nb1-51、Nb1-59、Nb3-18、Nb3-43、Nb5-31、Nb6-29、Nb7-54、Nb10-55、Nb10-63、Nb10-87、Nb11-6、Nb11-72、Nb11-75。
实施例3抗体亲和力测定
通过生物膜层干涉技术(Bio-layer interferometry BLI)对14株阻断型TSLP纳米抗体的结合动力学进行检测。对于动力学测量,将候选抗体用PBST缓冲液稀释至5ug/mL,TSLP-Fc抗原用PBST缓冲液2倍梯度稀释六个浓度梯度(从20nM开始2倍梯度稀释),设置仪器运行条件:温度30℃,Shake speed 1000rpm。使用已包被Protein A的探针捕获抗体,捕获时间60s;结合梯度稀释的抗原,结合时间240s;解离时间300s;10mM甘氨酸(pH1.7)再生2次,每次5s。使用Fortebio Analysis 9.0版本进行分析,Global模式进行拟合,计算结合速率(Kon),解离速率(Kdis)和解离常数KD。结果如图2所示。
实施例4毕赤酵母表达人源化二价抗体
对候选抗体进行人源化改造,保持可变区不变,针对四个骨架区序列进行人源化设计,改造方法参见专利CN2018101517526中实施例4的方法。人源化后抗体的氨基酸序列如表1所示。
将以上人源化的抗体构建成二价形式,利用连接子(G4S)4连接,连接后的序列如SEQ ID NO.:40、SEQ ID NO.:41和SEQ ID NO.:42所示,随后利用毕赤酵母进行表达。简要地,表达方法如下:(1)将以上TSLP纳米抗体二价体序列构建至pPICZaA载体;(2)用Sac I限制性内切酶线性化后电转化至X-33感受态细胞中;(3)将电转的样品分别涂布在含有不同浓度博来霉素抗性的YPD平板培养基上,置于30℃培养箱中培养3-4天;(4)待平板培养基上长出单克隆后,挑取不同浓度平板上的单克隆置于BMGY培养基中,当BMGY培养液OD值达到20左右,收集菌体后更换至BMMY培养基中,28℃250rpm培养;(5)之后每24h取样,并补加终体积为1%的甲醇并取样;样品12000rpm离心5min,取上清,-20℃保存;连续诱导5天,结束培养;(6)将取到的上清样品进行SDS-PAGE检测。二价单域抗体的摇瓶表达量如图3所示。
实施例5ELISA检测人源化二价抗体阻断活性
将以上纯化的二价人源化抗体进行ELISA检测阻断活性。将人TSLP抗原蛋白分装至96孔板中,4℃过夜孵育;用PBST洗涤5次后,加入300uL 1%BSA封闭液,37℃孵育2小时;用PBST洗涤5次后,加入50uL梯度稀释好的抗体样品,再每孔加入50uL 0.02ug/mL生物素化的TSLPR蛋白,37℃孵育1小时;用PBST洗涤5次后,加入SA-HRP(1:100000稀释)100uL,37℃孵育1小时;用PBST洗涤5次后,加入TMB显色液100uL,37℃显色10min,加入2M H2SO4 50uL/孔终止反应,酶标仪450nm波长下测定吸收值。结果如图4所示:三株人源化二价抗体的阻断活性显著优于对照抗体Tezepelumab。
实施例6人源化二价抗体对BaF3/TSLPR-IL7R细胞中pSTAT5信号通路的抑制作用
将生长良好的BaF3/TSLPR-IL7R细胞于1000rpm离心5min,PBS重悬细胞,以每孔1x105个细胞孔分装到96孔板中。将25uL稀释好的人TSLP因子和梯度稀释的二价人源化抗体或者Tezepelumab混合,37度孵育30分钟后将混合物加入到细胞中37℃,5%CO2放置20分钟。PBS洗涤细胞后,加入甲醛固定,再加入预冷的甲醇孵育10分钟。最后加入抗磷酸化STAT5-PE标记抗体孵育30分钟,洗涤细胞后上流式细胞仪检测PE信号值。结果如图5所示,其中两株人源化抗体对BaF3/TSLPR-IL7R细胞中pSTAT5信号通路的抑制作用显著优于对照抗体Tezepelumab。
实施例7人源化二价抗体在7L发酵罐中的产量评估
将以上3个抗体的表达菌株甘油菌分别按1:100扩增培养一级种子,随后转入新鲜培养基中进行二级种子培养,待二级种子培养合格后接入7L发酵罐中进行发酵培养,自动流加氨水调节发酵培养pH为6.0。培养过程中,定时取样检测发酵液pH、菌体湿重、菌液OD值等,并根据溶氧变化调节搅拌转速、罐压和氧气通气量。根据发酵菌体湿重和溶氧变化,在发酵培养的不同阶段分别流加甘油补料培养基和甲醇补料培养基。甲醇诱导培养160h~200h,停止发酵。经检测上述三个人源化二价抗体的产量分别为17g/L,19g/L和23g/L。该抗体产量远远高于已报到的所有类型抗体发酵表达产量,达到行业领先水平。
序列信息:
SEQ ID NO.1:
GFTLDDSDMG
SEQ ID NO.2:
ISSLGGT
SEQ ID NO.3:
APGTDRYSDCPNEYSV
SEQ ID NO.4:
QVQLQESGGGSVQAGGSLRLSCTAS
SEQ ID NO.5:
WYRQAPGDECELVST
SEQ ID NO.6:
YYADSVKGRFTISHDNAKNTVYLQMNSLKPHDTAVYYC
SEQ ID NO.7:
WGQGTQVTVSS
SEQ ID NO.8:
QVQLQESGGGSVQAGGSLRLSCTASGFTLDDSDMGWYRQAPGDECELVSTISSLGGTYYADSVKGRFTISHDNAKNTVYLQMNSLKPHDTAVYYCAPGTDRYSDCPNEYSVWGQGTQVTVSS
SEQ ID NO.9:
CAGGTGCAGCTGCAGGAGTCTGGAGGAGGCTCGGTGCAGGCTGGAGGGTCTCTGAGACTCTCCTGTACAGCCTCTGGATTCACTTTGGATGATTCTGACATGGGCTGGTACCGCCAGGCTCCAGGGGATGAGTGCGAGTTGGTCTCAACTATTAGTAGTTTGGGTGGCACATACTATGCAGACTCCGTGAAGGGCCGATTCACCATCTCCCATGACAACGCCAAGAACACGGTGTATCTGCAAATGAACAGCCTGAAACCTCACGACACGGCCGTGTATTACTGTGCGCCGGGGACAGACCGTTATAGCGACTGCCCTAATGAGTATAGCGTCTGGGGCCAGGGGACCCAGGTCACCGTCTCCTCA
SEQ ID NO.10:
EVQLLESGGGLVQPGGSLRLSCTAS
SEQ ID NO.11:
WGQGTLVTVSS
SEQ ID NO.12:
EVQLLESGGGLVQPGGSLRLSCTASGFTLDDSDMGWYRQAPGDECELVSTISSLGGTYYADSVKGRFTISHDNAKNTVYLQMNSLKPHDTAVYYCAPGTDRYSDCPNEYSVWGQGTLVTVSS
SEQ ID NO.13:
GAGGTTCAATTGTTGGAATCTGGTGGTGGTTTGGTTCAACCAGGTGGTTCTTTGAGATTGTCTTGTACTGCTTCTGGTTTCACCTTGGACGATTCTGATATGGGATGGTACAGACAAGCTCCAGGAGATGAGTGTGAGTTGGTTTCTACTATCTCTTCCTTGGGTGGAACCTACTACGCTGATTCTGTCAAGGGTCGTTTCACTATTTCTCACGATAATGCTAAGAACACCGTTTACTTGCAAATGAACTCTTTAAAGCCACATGATACTGCCGTTTACTACTGTGCTCCTGGTACTGATAGATACTCTGACTGTCCAAACGAATACTCCGTTTGGGGTCAGGGTACTTTGGTTACTGTCTCTTCC
SEQ ID NO.14:
GFTFDDSDMG
SEQ ID NO.15:
ISSDGMT
SEQ ID NO.16:
AATKYSSDYDVAEDWRRGVCGDMDY
SEQ ID NO.17:
QVQLQESGGGSVQAGETLRLSCTAS
SEQ ID NO.18:
WYRQAPGNECELVSI
SEQ ID NO.19:
YYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYC
SEQ ID NO.20:
WGKGTQVTVSS
SEQ ID NO.21:
QVQLQESGGGSVQAGETLRLSCTASGFTFDDSDMGWYRQAPGNECELVSIISSDGMTYYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYCAATKYSSDYDVAEDWRRGVCGDMDYWGKGTQVTVSS
SEQ ID NO.22:
CAGGTGCAGCTGCAGGAGTCTGGAGGAGGCTCGGTGCAGGCTGGAGAGACTCTGAGACTCTCCTGTACAGCCTCTGGATTCACTTTTGATGATTCTGACATGGGCTGGTACCGCCAGGCTCCAGGGAATGAGTGCGAGTTGGTCTCAATTATTAGTAGTGATGGTATGACATACTATGCAGACTCCGTGAAGGGCCGATTCACCATCTCCCAAGACAACGCCAAGAACACGGTGTATCTGCAAATGAACAGCCTGAAACCTGAGGACACAGCCGTGTATTACTGTGCGGCGACGAAGTACTCCAGCGACTATGACGTAGCTGAGGATTGGAGACGCGGGGTCTGTGGAGACATGGACTACTGGGGCAAAGGAACCCAGGTCACCGTCTCCTCA
SEQ ID NO.23:
EVQLLESGGGLVQPGETLRLSCTAS
SEQ ID NO.24:
WGKGTLVTVSS
SEQ ID NO.25:
EVQLLESGGGLVQPGETLRLSCTASGFTFDDSDMGWYRQAPGNECELVSIISSDGMTYYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYCAATKYSSDYDVAEDWRRGVCGDMDYWGKGTLVTVSS
SEQ ID NO.26:
GAAGTCCAATTGCTTGAATCCGGTGGTGGATTAGTTCAACCAGGTGAGACCTTGAGACTGTCCTGTACCGCTTCCGGTTTCACTTTCGACGACTCCGACATGGGTTGGTACAGACAGGCTCCAGGTAATGAGTGTGAGTTGGTTTCTATTATTTCCTCTGATGGTATGACTTACTACGCTGATTCTGTTAAGGGTAGATTCACTATCTCTCAAGACAATGCTAAGAACACTGTTTACTTGCAAATGAACTCTTTGAAGCCTGAAGATACCGCCGTCTACTACTGTGCTGCCACCAAGTACTCCTCCGATTATGATGTCGCTGAAGATTGGAGAAGAGGAGTTTGTGGAGATATGGATTACTGGGGTAAAGGTACTTTGGTTACCGTTTCTTCT
SEQ ID NO.27:
GFTSGGSDMG
SEQ ID NO.28:
ISSDGST
SEQ ID NO.29:
AATDYGLGPPPSSTGQCYGMDY
SEQ ID NO.30:
QVQLQESGGGSVQAGGSLRLSCTAS
SEQ ID NO.31:
WYRQAPGNECDLVSY
SEQ ID NO.32:
YYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYC
SEQ ID NO.33:
WGKGTQVTVSS
SEQ ID NO.34:
QVQLQESGGGSVQAGGSLRLSCTASGFTSGGSDMGWYRQAPGNECDLVSYISSDGSTYYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYCAATDYGLGPPPSSTGQCYGMDYWGKGTQVTVSS
SEQ ID NO.35:
CAGGTGCAGCTGCAGGAGTCTGGGGGAGGCTCGGTGCAGGCTGGAGGGTCTCTGAGACTCTCCTGTACAGCCTCTGGATTCACTTCTGGCGGTTCTGACATGGGCTGGTACCGCCAGGCTCCAGGGAATGAGTGCGACTTGGTCTCATATATTAGTAGTGATGGTAGCACATACTATGCAGACTCCGTGAAGGGCCGATTCACCATCTCCCAAGACAACGCCAAGAACACGGTGTATCTGCAAATGAACAGCCTGAAACCTGAGGACACGGCCGTGTATTACTGTGCGGCCACCGACTATGGGTTGGGGCCGCCCCCTTCTTCGACGGGCCAATGTTACGGCATGGACTACTGGGGCAAAGGAACCCAGGTCACCGTCTCCTCA
SEQ ID NO.36:
EVQLLESGGGLVQPGGSLRLSCTAS
SEQ ID NO.37:
WGKGTLVTVSS
SEQ ID NO.38:
EVQLLESGGGLVQPGGSLRLSCTASGFTSGGSDMGWYRQAPGNECDLVSYISSDGSTYYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYCAATDYGLGPPPSSTGQCYGMDYWGKGTLVTVSS
SEQ ID NO.39:
GAAGTTCAGTTGTTGGAATCAGGTGGTGGTTTGGTTCAACCAGGAGGTTCTCTGAGATTGTCTTGTACTGCTTCCGGTTTCACTTCCGGAGGTTCTGACATGGGATGGTACCGTCAAGCTCCTGGTAACGAGTGCGACTTGGTTTCTTACATCTCTTCCGACGGTTCCACTTACTACGCTGATTCTGTTAAGGGTAGATTCACTATTTCTCAAGACAACGCTAAGAATACTGTTTACTTGCAGATGAACTCTTTGAAGCCAGAGGATACCGCTGTTTACTATTGTGCCGCCACTGATTACGGTTTGGGTCCTCCACCATCTTCTACTGGACAATGTTACGGTATGGATTACTGGGGTAAAGGTACCCTGGTCACCGTTTCCTCT
SEQ ID NO.40:
EVQLLESGGGLVQPGGSLRLSCTASGFTLDDSDMGWYRQAPGDECELVSTISSLGGTYYADSVKGRFTISHDNAKNTVYLQMNSLKPHDTAVYYCAPGTDRYSDCPNEYSVWGQGTLVTVSSGGGGSGGGGSGGGGSGGGGSEVQLLESGGGLVQPGGSLRLSCTASGFTLDDSDMGWYRQAPGDECELVSTISSLGGTYYADSVKGRFTISHDNAKNTVYLQMNSLKPHDTAVYYCAPGTDRYSDCPNEYSVWGQGTLVTVSS
SEQ ID NO.41:
EVQLLESGGGLVQPGETLRLSCTASGFTFDDSDMGWYRQAPGNECELVSIISSDGMTYYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYCAATKYSSDYDVAEDWRRGVCGDMDYWGKGTLVTVSSGGGGSGGGGSGGGGSGGGGSEVQLLESGGGLVQPGETLRLSCTASGFTFDDSDMGWYRQAPGNECELVSIISSDGMTYYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYCAATKYSSDYDVAEDWRRGVCGDMDYWGKGTLVTVSS
SEQ ID NO.42:
EVQLLESGGGLVQPGGSLRLSCTASGFTSGGSDMGWYRQAPGNECDLVSYISSDGSTYYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYCAATDYGLGPPPSSTGQCYGMDYWGKGTLVTVSSGGGGSGGGGSGGGGSGGGGSEVQLLESGGGLVQPGGSLRLSCTASGFTSGGSDMGWYRQAPGNECDLVSYISSDGSTYYADSVKGRFTISQDNAKNTVYLQMNSLKPEDTAVYYCAATDYGLGPPPSSTGQCYGMDYWGKGTLVTVSS
在本发明提及的所有文献都在本申请中引用作为参考,就如同每一篇文献被单独引用作为参考那样。此外应理解,在阅读了本发明的上述讲授内容之后,本领域技术人员可以对本发明作各种改动或修改,这些等价形式同样落于本申请所附权利要求书所限定的范围。
序列表
<110> 上海洛启生物医药技术有限公司
<120> 抗TSLP纳米抗体及其应用
<130> P2022-0037
<150> CN202110164376.6
<151> 2021-02-05
<160> 42
<170> PatentIn version 3.5
<210> 1
<211> 10
<212> PRT
<213> 人工序列(artificial sequence)
<400> 1
Gly Phe Thr Leu Asp Asp Ser Asp Met Gly
1 5 10
<210> 2
<211> 7
<212> PRT
<213> 人工序列(artificial sequence)
<400> 2
Ile Ser Ser Leu Gly Gly Thr
1 5
<210> 3
<211> 16
<212> PRT
<213> 人工序列(artificial sequence)
<400> 3
Ala Pro Gly Thr Asp Arg Tyr Ser Asp Cys Pro Asn Glu Tyr Ser Val
1 5 10 15
<210> 4
<211> 25
<212> PRT
<213> 人工序列(artificial sequence)
<400> 4
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Ser Val Gln Ala Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Thr Ala Ser
20 25
<210> 5
<211> 15
<212> PRT
<213> 人工序列(artificial sequence)
<400> 5
Trp Tyr Arg Gln Ala Pro Gly Asp Glu Cys Glu Leu Val Ser Thr
1 5 10 15
<210> 6
<211> 38
<212> PRT
<213> 人工序列(artificial sequence)
<400> 6
Tyr Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile Ser His Asp Asn
1 5 10 15
Ala Lys Asn Thr Val Tyr Leu Gln Met Asn Ser Leu Lys Pro His Asp
20 25 30
Thr Ala Val Tyr Tyr Cys
35
<210> 7
<211> 11
<212> PRT
<213> 人工序列(artificial sequence)
<400> 7
Trp Gly Gln Gly Thr Gln Val Thr Val Ser Ser
1 5 10
<210> 8
<211> 122
<212> PRT
<213> 人工序列(artificial sequence)
<400> 8
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Ser Val Gln Ala Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Phe Thr Leu Asp Asp Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asp Glu Cys Glu Leu Val
35 40 45
Ser Thr Ile Ser Ser Leu Gly Gly Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser His Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro His Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Pro Gly Thr Asp Arg Tyr Ser Asp Cys Pro Asn Glu Tyr Ser Val Trp
100 105 110
Gly Gln Gly Thr Gln Val Thr Val Ser Ser
115 120
<210> 9
<211> 366
<212> DNA
<213> 人工序列(artificial sequence)
<400> 9
caggtgcagc tgcaggagtc tggaggaggc tcggtgcagg ctggagggtc tctgagactc 60
tcctgtacag cctctggatt cactttggat gattctgaca tgggctggta ccgccaggct 120
ccaggggatg agtgcgagtt ggtctcaact attagtagtt tgggtggcac atactatgca 180
gactccgtga agggccgatt caccatctcc catgacaacg ccaagaacac ggtgtatctg 240
caaatgaaca gcctgaaacc tcacgacacg gccgtgtatt actgtgcgcc ggggacagac 300
cgttatagcg actgccctaa tgagtatagc gtctggggcc aggggaccca ggtcaccgtc 360
tcctca 366
<210> 10
<211> 25
<212> PRT
<213> 人工序列(artificial sequence)
<400> 10
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 Thr Ala Ser
20 25
<210> 11
<211> 11
<212> PRT
<213> 人工序列(artificial sequence)
<400> 11
Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser
1 5 10
<210> 12
<211> 122
<212> PRT
<213> 人工序列(artificial sequence)
<400> 12
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 Thr Ala Ser Gly Phe Thr Leu Asp Asp Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asp Glu Cys Glu Leu Val
35 40 45
Ser Thr Ile Ser Ser Leu Gly Gly Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser His Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro His Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Pro Gly Thr Asp Arg Tyr Ser Asp Cys Pro Asn Glu Tyr Ser Val Trp
100 105 110
Gly Gln Gly Thr Leu Val Thr Val Ser Ser
115 120
<210> 13
<211> 366
<212> DNA
<213> 人工序列(artificial sequence)
<400> 13
gaggttcaat tgttggaatc tggtggtggt ttggttcaac caggtggttc tttgagattg 60
tcttgtactg cttctggttt caccttggac gattctgata tgggatggta cagacaagct 120
ccaggagatg agtgtgagtt ggtttctact atctcttcct tgggtggaac ctactacgct 180
gattctgtca agggtcgttt cactatttct cacgataatg ctaagaacac cgtttacttg 240
caaatgaact ctttaaagcc acatgatact gccgtttact actgtgctcc tggtactgat 300
agatactctg actgtccaaa cgaatactcc gtttggggtc agggtacttt ggttactgtc 360
tcttcc 366
<210> 14
<211> 10
<212> PRT
<213> 人工序列(artificial sequence)
<400> 14
Gly Phe Thr Phe Asp Asp Ser Asp Met Gly
1 5 10
<210> 15
<211> 7
<212> PRT
<213> 人工序列(artificial sequence)
<400> 15
Ile Ser Ser Asp Gly Met Thr
1 5
<210> 16
<211> 25
<212> PRT
<213> 人工序列(artificial sequence)
<400> 16
Ala Ala Thr Lys Tyr Ser Ser Asp Tyr Asp Val Ala Glu Asp Trp Arg
1 5 10 15
Arg Gly Val Cys Gly Asp Met Asp Tyr
20 25
<210> 17
<211> 25
<212> PRT
<213> 人工序列(artificial sequence)
<400> 17
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Ser Val Gln Ala Gly Glu
1 5 10 15
Thr Leu Arg Leu Ser Cys Thr Ala Ser
20 25
<210> 18
<211> 15
<212> PRT
<213> 人工序列(artificial sequence)
<400> 18
Trp Tyr Arg Gln Ala Pro Gly Asn Glu Cys Glu Leu Val Ser Ile
1 5 10 15
<210> 19
<211> 38
<212> PRT
<213> 人工序列(artificial sequence)
<400> 19
Tyr Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Gln Asp Asn
1 5 10 15
Ala Lys Asn Thr Val Tyr Leu Gln Met Asn Ser Leu Lys Pro Glu Asp
20 25 30
Thr Ala Val Tyr Tyr Cys
35
<210> 20
<211> 11
<212> PRT
<213> 人工序列(artificial sequence)
<400> 20
Trp Gly Lys Gly Thr Gln Val Thr Val Ser Ser
1 5 10
<210> 21
<211> 131
<212> PRT
<213> 人工序列(artificial sequence)
<400> 21
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Ser Val Gln Ala Gly Glu
1 5 10 15
Thr Leu Arg Leu Ser Cys Thr Ala Ser Gly Phe Thr Phe Asp Asp Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asn Glu Cys Glu Leu Val
35 40 45
Ser Ile Ile Ser Ser Asp Gly Met Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser Gln Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Ala Thr Lys Tyr Ser Ser Asp Tyr Asp Val Ala Glu Asp Trp Arg Arg
100 105 110
Gly Val Cys Gly Asp Met Asp Tyr Trp Gly Lys Gly Thr Gln Val Thr
115 120 125
Val Ser Ser
130
<210> 22
<211> 393
<212> DNA
<213> 人工序列(artificial sequence)
<400> 22
caggtgcagc tgcaggagtc tggaggaggc tcggtgcagg ctggagagac tctgagactc 60
tcctgtacag cctctggatt cacttttgat gattctgaca tgggctggta ccgccaggct 120
ccagggaatg agtgcgagtt ggtctcaatt attagtagtg atggtatgac atactatgca 180
gactccgtga agggccgatt caccatctcc caagacaacg ccaagaacac ggtgtatctg 240
caaatgaaca gcctgaaacc tgaggacaca gccgtgtatt actgtgcggc gacgaagtac 300
tccagcgact atgacgtagc tgaggattgg agacgcgggg tctgtggaga catggactac 360
tggggcaaag gaacccaggt caccgtctcc tca 393
<210> 23
<211> 25
<212> PRT
<213> 人工序列(artificial sequence)
<400> 23
Glu Val Gln Leu Leu Glu Ser Gly Gly Gly Leu Val Gln Pro Gly Glu
1 5 10 15
Thr Leu Arg Leu Ser Cys Thr Ala Ser
20 25
<210> 24
<211> 11
<212> PRT
<213> 人工序列(artificial sequence)
<400> 24
Trp Gly Lys Gly Thr Leu Val Thr Val Ser Ser
1 5 10
<210> 25
<211> 131
<212> PRT
<213> 人工序列(artificial sequence)
<400> 25
Glu Val Gln Leu Leu Glu Ser Gly Gly Gly Leu Val Gln Pro Gly Glu
1 5 10 15
Thr Leu Arg Leu Ser Cys Thr Ala Ser Gly Phe Thr Phe Asp Asp Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asn Glu Cys Glu Leu Val
35 40 45
Ser Ile Ile Ser Ser Asp Gly Met Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser Gln Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Ala Thr Lys Tyr Ser Ser Asp Tyr Asp Val Ala Glu Asp Trp Arg Arg
100 105 110
Gly Val Cys Gly Asp Met Asp Tyr Trp Gly Lys Gly Thr Leu Val Thr
115 120 125
Val Ser Ser
130
<210> 26
<211> 393
<212> DNA
<213> 人工序列(artificial sequence)
<400> 26
gaagtccaat tgcttgaatc cggtggtgga ttagttcaac caggtgagac cttgagactg 60
tcctgtaccg cttccggttt cactttcgac gactccgaca tgggttggta cagacaggct 120
ccaggtaatg agtgtgagtt ggtttctatt atttcctctg atggtatgac ttactacgct 180
gattctgtta agggtagatt cactatctct caagacaatg ctaagaacac tgtttacttg 240
caaatgaact ctttgaagcc tgaagatacc gccgtctact actgtgctgc caccaagtac 300
tcctccgatt atgatgtcgc tgaagattgg agaagaggag tttgtggaga tatggattac 360
tggggtaaag gtactttggt taccgtttct tct 393
<210> 27
<211> 10
<212> PRT
<213> 人工序列(artificial sequence)
<400> 27
Gly Phe Thr Ser Gly Gly Ser Asp Met Gly
1 5 10
<210> 28
<211> 7
<212> PRT
<213> 人工序列(artificial sequence)
<400> 28
Ile Ser Ser Asp Gly Ser Thr
1 5
<210> 29
<211> 22
<212> PRT
<213> 人工序列(artificial sequence)
<400> 29
Ala Ala Thr Asp Tyr Gly Leu Gly Pro Pro Pro Ser Ser Thr Gly Gln
1 5 10 15
Cys Tyr Gly Met Asp Tyr
20
<210> 30
<211> 25
<212> PRT
<213> 人工序列(artificial sequence)
<400> 30
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Ser Val Gln Ala Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Thr Ala Ser
20 25
<210> 31
<211> 15
<212> PRT
<213> 人工序列(artificial sequence)
<400> 31
Trp Tyr Arg Gln Ala Pro Gly Asn Glu Cys Asp Leu Val Ser Tyr
1 5 10 15
<210> 32
<211> 38
<212> PRT
<213> 人工序列(artificial sequence)
<400> 32
Tyr Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Gln Asp Asn
1 5 10 15
Ala Lys Asn Thr Val Tyr Leu Gln Met Asn Ser Leu Lys Pro Glu Asp
20 25 30
Thr Ala Val Tyr Tyr Cys
35
<210> 33
<211> 11
<212> PRT
<213> 人工序列(artificial sequence)
<400> 33
Trp Gly Lys Gly Thr Gln Val Thr Val Ser Ser
1 5 10
<210> 34
<211> 128
<212> PRT
<213> 人工序列(artificial sequence)
<400> 34
Gln Val Gln Leu Gln Glu Ser Gly Gly Gly Ser Val Gln Ala Gly Gly
1 5 10 15
Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Phe Thr Ser Gly Gly Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asn Glu Cys Asp Leu Val
35 40 45
Ser Tyr Ile Ser Ser Asp Gly Ser Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser Gln Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Ala Thr Asp Tyr Gly Leu Gly Pro Pro Pro Ser Ser Thr Gly Gln Cys
100 105 110
Tyr Gly Met Asp Tyr Trp Gly Lys Gly Thr Gln Val Thr Val Ser Ser
115 120 125
<210> 35
<211> 384
<212> DNA
<213> 人工序列(artificial sequence)
<400> 35
caggtgcagc tgcaggagtc tgggggaggc tcggtgcagg ctggagggtc tctgagactc 60
tcctgtacag cctctggatt cacttctggc ggttctgaca tgggctggta ccgccaggct 120
ccagggaatg agtgcgactt ggtctcatat attagtagtg atggtagcac atactatgca 180
gactccgtga agggccgatt caccatctcc caagacaacg ccaagaacac ggtgtatctg 240
caaatgaaca gcctgaaacc tgaggacacg gccgtgtatt actgtgcggc caccgactat 300
gggttggggc cgcccccttc ttcgacgggc caatgttacg gcatggacta ctggggcaaa 360
ggaacccagg tcaccgtctc ctca 384
<210> 36
<211> 25
<212> PRT
<213> 人工序列(artificial sequence)
<400> 36
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 Thr Ala Ser
20 25
<210> 37
<211> 11
<212> PRT
<213> 人工序列(artificial sequence)
<400> 37
Trp Gly Lys Gly Thr Leu Val Thr Val Ser Ser
1 5 10
<210> 38
<211> 128
<212> PRT
<213> 人工序列(artificial sequence)
<400> 38
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 Thr Ala Ser Gly Phe Thr Ser Gly Gly Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asn Glu Cys Asp Leu Val
35 40 45
Ser Tyr Ile Ser Ser Asp Gly Ser Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser Gln Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Ala Thr Asp Tyr Gly Leu Gly Pro Pro Pro Ser Ser Thr Gly Gln Cys
100 105 110
Tyr Gly Met Asp Tyr Trp Gly Lys Gly Thr Leu Val Thr Val Ser Ser
115 120 125
<210> 39
<211> 384
<212> DNA
<213> 人工序列(artificial sequence)
<400> 39
gaagttcagt tgttggaatc aggtggtggt ttggttcaac caggaggttc tctgagattg 60
tcttgtactg cttccggttt cacttccgga ggttctgaca tgggatggta ccgtcaagct 120
cctggtaacg agtgcgactt ggtttcttac atctcttccg acggttccac ttactacgct 180
gattctgtta agggtagatt cactatttct caagacaacg ctaagaatac tgtttacttg 240
cagatgaact ctttgaagcc agaggatacc gctgtttact attgtgccgc cactgattac 300
ggtttgggtc ctccaccatc ttctactgga caatgttacg gtatggatta ctggggtaaa 360
ggtaccctgg tcaccgtttc ctct 384
<210> 40
<211> 264
<212> PRT
<213> 人工序列(artificial sequence)
<400> 40
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 Thr Ala Ser Gly Phe Thr Leu Asp Asp Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asp Glu Cys Glu Leu Val
35 40 45
Ser Thr Ile Ser Ser Leu Gly Gly Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser His Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro His Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Pro Gly Thr Asp Arg Tyr Ser Asp Cys Pro Asn Glu Tyr Ser Val Trp
100 105 110
Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly
115 120 125
Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Glu Val
130 135 140
Gln Leu Leu Glu Ser Gly Gly Gly Leu Val Gln Pro Gly Gly Ser Leu
145 150 155 160
Arg Leu Ser Cys Thr Ala Ser Gly Phe Thr Leu Asp Asp Ser Asp Met
165 170 175
Gly Trp Tyr Arg Gln Ala Pro Gly Asp Glu Cys Glu Leu Val Ser Thr
180 185 190
Ile Ser Ser Leu Gly Gly Thr Tyr Tyr Ala Asp Ser Val Lys Gly Arg
195 200 205
Phe Thr Ile Ser His Asp Asn Ala Lys Asn Thr Val Tyr Leu Gln Met
210 215 220
Asn Ser Leu Lys Pro His Asp Thr Ala Val Tyr Tyr Cys Ala Pro Gly
225 230 235 240
Thr Asp Arg Tyr Ser Asp Cys Pro Asn Glu Tyr Ser Val Trp Gly Gln
245 250 255
Gly Thr Leu Val Thr Val Ser Ser
260
<210> 41
<211> 282
<212> PRT
<213> 人工序列(artificial sequence)
<400> 41
Glu Val Gln Leu Leu Glu Ser Gly Gly Gly Leu Val Gln Pro Gly Glu
1 5 10 15
Thr Leu Arg Leu Ser Cys Thr Ala Ser Gly Phe Thr Phe Asp Asp Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asn Glu Cys Glu Leu Val
35 40 45
Ser Ile Ile Ser Ser Asp Gly Met Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser Gln Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Ala Thr Lys Tyr Ser Ser Asp Tyr Asp Val Ala Glu Asp Trp Arg Arg
100 105 110
Gly Val Cys Gly Asp Met Asp Tyr Trp Gly Lys Gly Thr Leu Val Thr
115 120 125
Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly
130 135 140
Gly Ser Gly Gly Gly Gly Ser Glu Val Gln Leu Leu Glu Ser Gly Gly
145 150 155 160
Gly Leu Val Gln Pro Gly Glu Thr Leu Arg Leu Ser Cys Thr Ala Ser
165 170 175
Gly Phe Thr Phe Asp Asp Ser Asp Met Gly Trp Tyr Arg Gln Ala Pro
180 185 190
Gly Asn Glu Cys Glu Leu Val Ser Ile Ile Ser Ser Asp Gly Met Thr
195 200 205
Tyr Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Gln Asp Asn
210 215 220
Ala Lys Asn Thr Val Tyr Leu Gln Met Asn Ser Leu Lys Pro Glu Asp
225 230 235 240
Thr Ala Val Tyr Tyr Cys Ala Ala Thr Lys Tyr Ser Ser Asp Tyr Asp
245 250 255
Val Ala Glu Asp Trp Arg Arg Gly Val Cys Gly Asp Met Asp Tyr Trp
260 265 270
Gly Lys Gly Thr Leu Val Thr Val Ser Ser
275 280
<210> 42
<211> 276
<212> PRT
<213> 人工序列(artificial sequence)
<400> 42
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 Thr Ala Ser Gly Phe Thr Ser Gly Gly Ser
20 25 30
Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asn Glu Cys Asp Leu Val
35 40 45
Ser Tyr Ile Ser Ser Asp Gly Ser Thr Tyr Tyr Ala Asp Ser Val Lys
50 55 60
Gly Arg Phe Thr Ile Ser Gln Asp Asn Ala Lys Asn Thr Val Tyr Leu
65 70 75 80
Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala
85 90 95
Ala Thr Asp Tyr Gly Leu Gly Pro Pro Pro Ser Ser Thr Gly Gln Cys
100 105 110
Tyr Gly Met Asp Tyr Trp Gly Lys Gly Thr Leu Val Thr Val Ser Ser
115 120 125
Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly
130 135 140
Gly Gly Gly Ser Glu Val Gln Leu Leu Glu Ser Gly Gly Gly Leu Val
145 150 155 160
Gln Pro Gly Gly Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Phe Thr
165 170 175
Ser Gly Gly Ser Asp Met Gly Trp Tyr Arg Gln Ala Pro Gly Asn Glu
180 185 190
Cys Asp Leu Val Ser Tyr Ile Ser Ser Asp Gly Ser Thr Tyr Tyr Ala
195 200 205
Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Gln Asp Asn Ala Lys Asn
210 215 220
Thr Val Tyr Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val
225 230 235 240
Tyr Tyr Cys Ala Ala Thr Asp Tyr Gly Leu Gly Pro Pro Pro Ser Ser
245 250 255
Thr Gly Gln Cys Tyr Gly Met Asp Tyr Trp Gly Lys Gly Thr Leu Val
260 265 270
Thr Val Ser Ser
275
Claims (19)
1.一种抗TSLP纳米抗体,其特征在于,所述纳米抗体中的VHH链的互补决定区CDR区为选自下组的一种或多种:
(1)SEQ ID NO:1所示的CDR1、SEQ ID NO:2所示的CDR2、和SEQ ID NO:3所示的CDR3;
(2)SEQ ID NO:14所示的CDR1、SEQ ID NO:15所示的CDR2、和SEQ ID NO:16所示的CDR3;和
(3)SEQ ID NO:27所示的CDR1、SEQ ID NO:28所示的CDR2、和SEQ ID NO:29所示的CDR3。
2.如权利要求1所述的抗TSLP纳米抗体,其特征在于,所述抗TSLP纳米抗体的VHH链还包括框架区FR,所述的框架区FR为选自下组的一种或多种:
(1)SEQ ID NO:4所示的FR1、SEQ ID NO:5所示的FR2、SEQ ID NO:6所示的FR3、和SEQID NO:7所示的FR4;
(2)SEQ ID NO:10所示的FR1、SEQ ID NO:5所示的FR2、SEQ ID NO:6所示的FR3、和SEQID NO:11所示的FR4;
(3)SEQ ID NO:17所示的FR1、SEQ ID NO:18所示的FR2、SEQ ID NO:19所示的FR3、和SEQ ID NO:20所示的FR4;
(4)SEQ ID NO:23所示的FR1、SEQ ID NO:18所示的FR2、SEQ ID NO:19所示的FR3、和SEQ ID NO:24所示的FR4;
(5)SEQ ID NO:30所示的FR1、SEQ ID NO:31所示的FR2、SEQ ID NO:32所示的FR3、和SEQ ID NO:33所示的FR4;和
(6)SEQ ID NO:36所示的FR1、SEQ ID NO:31所示的FR2、SEQ ID NO:32所示的FR3、和SEQ ID NO:37所示的FR4。
3.如权利要求1所述的抗TSLP纳米抗体,其特征在于,所述抗TSLP纳米抗体的VHH链的氨基酸序列选自下组:SEQ ID NO:8、SEQ ID NO:12、SEQ ID NO:21、SEQ ID NO:25、SEQ IDNO:34、SEQ ID NO:38、或其组合。
4.一种抗TSLP抗体,其特征在于,它是针对TSLP表位的抗体,并且具有权利要求1所述的抗TSLP纳米抗体。
5.一种抗TSLP抗体,其特征在于,所述抗体包括一个或多个如权利要求1所述的抗TSLP纳米抗体。
6.如权利要求4或5所述的抗体,其特征在于,所述抗体包括单体、二价抗体、和/或多价抗体。
7.一种多核苷酸,其特征在于,所述多核苷酸编码选自下组的蛋白质:权利要求1所述的抗TSLP纳米抗体、权利要求4所述的抗TSLP抗体或权利要求5所述的抗TSLP抗体。
8.一种表达载体,其特征在于,所述表达载体含有权利要求7所述的多核苷酸。
9.一种宿主细胞,其特征在于,所述宿主细胞含有权利要求8所述的表达载体,或其基因组中整合有权利要求7所述的多核苷酸。
10.一种产生抗TSLP纳米抗体的方法,其特征在于,包括步骤:
(a)在适合产生纳米抗体的条件下,培养权利要求9所述的宿主细胞,从而获得含所述抗TSLP纳米抗体的培养物;
(b)从所述培养物中分离或回收所述的抗TSLP纳米抗体;以及
(c)任选地,纯化和/或修饰得步骤(b)中获得的抗TSLP纳米抗体。
11.一种免疫偶联物,其特征在于,该免疫偶联物含有:
(a)权利要求1所述的抗TSLP纳米抗体、权利要求4所述的抗TSLP抗体或权利要求5所述的抗TSLP抗体;和
(b)选自下组的偶联部分:可检测标记物、药物、毒素、细胞因子、放射性核素、酶、金纳米颗粒/纳米棒、纳米磁粒、病毒外壳蛋白或VLP、或其组合。
12.一种多特异性抗体,其特征在于,所述的多特异性抗体包含:权利要求1所述的抗TSLP纳米抗体、权利要求4所述的抗TSLP抗体或权利要求5所述的抗TSLP抗体。
13.一种重组蛋白,其特征在于,所述的重组蛋白具有:
(i)如权利要求1所述的抗TSLP纳米抗体、权利要求4所述的抗TSLP抗体或权利要求5所述的抗TSLP抗体;以及
(ii)任选的协助表达和/或纯化的标签序列。
14.一种药物组合物,其特征在于,所述药物组合物含有:
(i)权利要求1所述的抗TSLP纳米抗体、权利要求4所述的抗TSLP抗体或权利要求5所述的抗TSLP抗体、或权利要求11所述的免疫偶联物或权利要求12所述的多特异性抗体或权利要求13所述的重组蛋白;以及
(ii)药学上可接受的载体。
15.权利要求1所述的抗TSLP纳米抗体、权利要求4所述的抗TSLP抗体或权利要求5所述的抗TSLP抗体、如权利要求11所述的免疫偶联物或权利要求12所述的多特异性抗体或权利要求13所述的重组蛋白或权利要求14所述的药物组合物的用途;其特征在于,(a)用于制备预防和/或治疗与TSLP相关的疾病的药物;和/或(b)用于制备检测TSLP的试剂、检测板或试剂盒。
16.一种检测样品中TSLP蛋白的方法,其特征在于,所述方法包括步骤:
(1)将样品与权利要求1所述的抗TSLP纳米抗体、权利要求4所述的抗TSLP抗体或权利要求5所述的抗TSLP抗体、或权利要求11所述的免疫偶联物或权利要求12所述的多特异性抗体或权利要求13所述的重组蛋白接触;
(2)检测是否形成抗原-抗体复合物,其中形成复合物就表示样品中存在TSLP蛋白。
17.一种TSLP蛋白检测试剂,其特征在于,所述的检测试剂包含:
(i)权利要求1所述的抗TSLP纳米抗体、权利要求4所述的抗TSLP抗体或权利要求5所述的抗TSLP抗体、或权利要求11所述的免疫偶联物或权利要求12所述的多特异性抗体或权利要求13所述的重组蛋白;以及
(ii)检测学上可接受的载体。
18.一种检测TSLP蛋白的试剂盒,其特征在于,所述试剂盒含有权利要求7所述的免疫偶联物或权利要求17所述的检测试剂,以及说明书。
19.一种权利要求11所述的免疫偶联物的用途,其特征在于,用于制备体内检测TSLP蛋白的造影剂。
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KR1020237025523A KR20230125042A (ko) | 2021-02-05 | 2022-05-16 | 항-tslp 나노항체 및 이의 응용 |
EP22912783.2A EP4257605A1 (en) | 2021-02-05 | 2022-05-16 | Anti-tslp nanobody and use thereof |
JP2023540115A JP2024512858A (ja) | 2021-02-05 | 2022-05-16 | 抗tslpナノ抗体およびその使用 |
CA3209675A CA3209675A1 (en) | 2021-02-05 | 2022-05-16 | Anti-tslp nanobodies and their applications |
PCT/CN2022/093166 WO2023142309A1 (zh) | 2021-02-05 | 2022-05-16 | 抗tslp纳米抗体及其应用 |
AU2022434181A AU2022434181A1 (en) | 2021-02-05 | 2022-05-16 | Anti-TSLP nanobodies and their applications |
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CN115850493A (zh) * | 2022-11-08 | 2023-03-28 | 江苏耀海生物制药有限公司 | 一种二价纳米抗体Cablivi的分离纯化方法 |
CN117551195A (zh) * | 2024-01-12 | 2024-02-13 | 杭州畅溪制药有限公司 | 靶向tslp的vhh纳米抗体及其应用 |
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