抗体药物筛选
肿瘤细胞表面表达的靶抗原是ADC识别肿瘤细胞并引导细胞毒性有效载荷进入癌细胞的关键因素。因此,选择适当的靶抗原是设计ADC药物的首要考量。理想的抗原应当具备特异性表达、非分泌性以及良好的内化特性。
ACROBiosystems百普赛斯开发了90+高质量ADC药物靶点蛋白,覆盖Human、Mouse、Cynomolgus、Rat等多个种属及多种标签,具有高纯度及高生物活性,可用于免疫、抗体筛选、种属交叉验证、质控放行、药代动力学研究等多种应用场景。
ADC的偶联方式一般分为随机偶联和定点偶联,其中定点偶联因其能够获得高均一性、高安全性的偶联药物,已获得越来越多的青睐。作为定点偶联的其中一种方式,糖基偶联技术利用抗体Fc端保守的N297糖基化位点实现偶联,位点远离抗原抗体结合域的特性使得利用该位点进行的偶联不会对抗体的结合功能造成影响。而且此方法无需对抗体进行工程化改造,提高了便捷性和普适性,极大地加速了早期研发的效率。
ACROBiosystems百普赛斯与岩唐生物科技(杭州)有限责任公司合作推出了AGLink®新型DAR2&4定点偶联试剂盒,该试剂盒基于岩唐生物的YTConju™糖基偶联技术平台开发,包含毒素(MMAE)、反应官能团(Tz/DBCO)、检测标签(Biotin)三大模块,采用“One-Pot”&“One-Step”的方法,产生高度均一的偶联产物,为偶联药物的早期研究及相关生物学实验提供强大支持。
分子 | 货号 | 产品描述 | 订购/预购 |
---|---|---|---|
MMAE | ADC-P005 | AGLink® ADC Conjugation Kit (MMAE, DAR2&4, 1mg) | |
Tetrazine | ADC-P006 | AGLink® ADC Conjugation Kit (Tetrazine, DAR2&4, 1mg) | |
DBCO | ADC-P007 | AGLink® ADC Conjugation Kit (DBCO, DAR2&4, 1mg) | |
Biotin | ADC-P008 | AGLink® ADC Conjugation Kit (Biotin, DAR2&4, 1mg) | |
MMAE | ADC-P009 | AGLink® ADC Conjugation Kit (MMAE, DAR2&4, 5mg) | |
Tetrazine | ADC-P010 | AGLink® ADC Conjugation Kit (Tetrazine, DAR2&4, 5mg) | |
DBCO | ADC-P011 | AGLink® ADC Conjugation Kit (DBCO, DAR2&4, 5mg) | |
Biotin | ADC-P012 | AGLink® ADC Conjugation Kit (Biotin, DAR2&4, 5mg) |
在ADC药物的研发过程中,过表达细胞株发挥着关键作用。它们可用于ADC药物的靶点结合能力、内化效率等功能验证,帮助筛选出优质候选药物;还能为药物设计提供参考,如靶点蛋白的表达水平、内化机制等特性,助力选择合适的连接子和有效载荷。
为了深入研究ADC药物的作用机制并全面评价其功能,ACROBiosystems百普赛斯推出了ADC靶点蛋白过表达细胞系(Overexpression Stable Cell Lines)产品,基于成熟的细胞构建平台开发,在宿主细胞膜表面长期稳定地表达特定抗原,为ADC靶点特异性及抗体亲和力筛选验证、作用机制研究、CMC质控、ADC药物靶细胞杀伤验证等提供了强有力的工具。
分子 | 货号 | 产品描述 |
---|---|---|
B7-H3 (4Ig) | SCCHO-ATP169 | CHO/Human B7-H3 (4Ig) Stable Cell Line Development Service |
B7-H4 | CHEK-ATP126 | HEK293/Human B7-H4 Stable Cell Line |
Cadherin-17 | CHEK-ATP173 | HEK293/Human Cadherin-17 Stable Cell Line |
Cadherin-6 | CHEK-ATP127 | HEK293/Human Cadherin-6 Stable Cell Line |
CCR8 | CHEK-ATP140 | HEK293/Human CCR8 Stable Cell Line |
CD20 | CHEK-ATP034 | HEK293/Human CD20 Stable Cell Line |
CD79A & CD79B | SCCHO-ATP170 | CHO/Human CD79A&CD79B Stable Cell Line Development Service |
CD79B | SCCHO-ATP171 | CHO/Human CD79B Stable Cell Line Development Service |
CEACAM-5 | SCCHO-ATP081 | CHO/Human CEACAM5 Stable Cell Line Development Service |
CEACAM-5 | CHEK-ATP083 | HEK293/Human CEACAM5 Stable Cell Line |
Claudin-1 | CHEK-ATP124 | HEK293/Human Claudin-1 Stable Cell Line |
Claudin-18.2 | CHEK-ATP033 | HEK293/Human Claudin-18.2 Stable Cell Line |
DLL3 | CHEK-ATP090 | HEK293/Human DLL3 Stable Cell Line |
DLL3 | SCCHO-ATP111 | CHO/Human DLL3 Stable Cell Line Development Service |
EGF R | CHEK-ATP148 | HEK293/Human EGF R Stable Cell Line |
ENPP3 | CHEK-ATP122 | HEK293/Human ENPP3 Stable Cell Line |
EpCAM | CHEK-ATP175 | HEK293/Human EpCAM Stable Cell Line |
ErbB3 | CHEK-ATP149 | HEK293/Human ErbB3 Stable Cell Line |
FAP | CHEK-ATP184 | HEK293/Human FAP Stable Cell Line |
FOLR1 | CHEK-ATP091 | HEK293/Human FOLR1 Stable Cell Line |
Glypican 3 | CHEK-ATP092 | HEK293/Human Glypican-3 (GPC3) Stable Cell Line |
Glypican 3 | SCCHO-ATP112 | CHO/Human Glypican-3 (GPC3) Stable Cell Line |
Glypican-3 | SCCHO-ATP179 | CHO/Cynomolgus Glypican-3 (GPC3) Stable Cell Line Development Service |
GPRC5D | CHEK-STP042 | HEK293/Human GPRC5D Stable Cell Line |
GPRC5D | CCHO-STP078 | CHO/Human GPRC5D Stable Cell Line |
GUCY2C | CHEK-ATP182 | HEK293/Human GUCY2C Stable Cell Line |
Her2 | CHEK-ATP150 | HEK293/Human ErbB2 Stable Cell Line |
HGF R | SCCHO-ATP141 | CHO/Human c-MET Stable Cell Line Development Service |
Integrin alpha V beta 6 | CHEK-ATP125 | HEK293/Human Integrin alpha V beta 6 Stable Cell Line |
LRRC15 | CHEK-ATP123 | HEK293/Human LRRC15 Stable Cell Line |
LY6G6D | CHEK-ATP137 | HEK293/Human LY6G6D Stable Cell Line |
Mesothelin | CHEK-ATP119 | HEK293/Human Mesothelin Stable Cell Line |
Mesothelin | SCCHO-ATP120 | CHO/Human Mesothelin Stable Cell Line Development Service |
NAPI-IIb | CHEK-ATP116 | HEK293/Human NAPI-IIb Stable Cell Line |
Nectin-4 | CHEK-ATP035 | HEK293/Human Nectin-4 Stable Cell Line |
PD-L1 | SCRAJ-STT075 | Raji/Human PD-L1 Stable Cell Line Development Service |
PD-L1 | SCCHO-ATP077L | CHO/Human PD-L1 Stable Cell Line (Low Expression) Development Service |
PD-L1 | SCCHO-ATP077M | CHO/Human PD-L1 Stable Cell Line (Medium Expression) Development Service |
PD-L1 | SCCHO-ATP077H | CHO/Human PD-L1 Stable Cell Line (High Expression) Development Service |
PSMA | CHEK-ATP185 | HEK293/Human PSMA Stable Cell Line |
PTK7 | CHEK-ATP186 | HEK293/Human PTK7 Stable Cell Line |
ROR1 | CHEK-ATP084 | HEK293/Human ROR1 Stable Cell Line |
ROR1 | SCCHO-ATP083 | CHO/Human ROR1 Stable Cell Line Development Service |
SEZ6 | CHEK-ATP183 | HEK293/Human SEZ6 Stable Cell Line |
STEAP1 | CHEK-ATP100 | HEK293/Human STEAP1 Stable Cell Line |
STEAP1 | SCCHO-ATP121 | CHO/Human STEAP1 Stable Cell Line Development Service |
TPBG | CHEK-ATP176 | HEK293/Human TPBG Stable Cell Line |
Transferrin | CHEK-ATP115 | HEK293/Human Transferrin Stable Cell Line |
Transferrin R | CHEK-ATP089 | HEK293/Human Transferrin R Stable Cell Line |
TROP-2 | CHEK-ATP036 | HEK293/Human TROP-2 Stable Cell Line |
uPAR | SCCHO-ATP152 | CHO/Human uPAR Stable Cell Line Development Service |
uPAR | CHEK-ATP151 | HEK293/Human uPAR Stable Cell Line |
功能验证
ADC药物的功效不仅取决于其Fab片段结合靶抗原的活性,还取决于其Fc片段与Fc受体的相互作用。ADC药物还可利用Fc介导的效应功能实现对肿瘤细胞的杀伤和清除,例如抗体依赖性细胞介导的细胞毒作用(ADCC)、补体依赖性细胞毒作用(CDC) 和抗体依赖性细胞吞噬作用 (ADCP)。Fc片段与FcRn受体的亲和力可以预测抗体的半衰期。因此,优化抗体结构,筛选获得和Fc受体亲和力最理想的抗体,是发展治疗性抗体药物的一个重要途径。
ACROBiosystems公司提供一系列Fc受体产品,包括了FcRn、FcγR及其常见的突变体。 同时,基于我司丰富的蛋白产品资源和活性分析经验,您只需提供样品,我们即可为您提供优质SPR&BLI亲和力检测服务,且免费提供实验所需所有高质量Fc受体蛋白!
ACROBiosystems百普赛斯推出ADCC / ADCP功能验证报告基因细胞株。通过基因工程改造,在Jurkat细胞内转入一个受NFAT信号调控驱动的Luciferase报告基因,同时使其在细胞膜表面表达一种FcγR。当将该细胞与靶细胞和相关抗体共培养时,抗体同时结合靶细胞抗原和该细胞表面Fcγ受体,导致受体聚集、细胞内信号传导和NFAT介导的Luciferase 报告基因表达与发光。
应用 | 分子 | 货号 | 产品描述 |
---|---|---|---|
ADCP | Fc gamma RIIA / CD32a | SCJUR-STF069 | Human CD32a (131H) (Luc) Jurkat Reporter Cell Development Service |
Fc gamma RIIA / CD32a | SCJUR-STF070 | Human CD32a (131R) (Luc) Jurkat Reporter Cell Development Service | |
Fc gamma RIIB / CD32b | SCJUR-STF071 | Human CD32b (Luc) Jurkat Reporter Cell Development Service | |
Fc gamma RI / CD64 | SCJUR-STF072 | Human CD64 (Luc) Jurkat Reporter Cell Development Service | |
ADCC | Fc gamma RIIIA / CD16a | SCJUR-STF067 | Human CD16a (158V) (Luc) Jurkat Reporter Cell Development Service |
Fc gamma RIIIA / CD16a | SCJUR-STF068 | Human CD16a (158F) (Luc) Jurkat Reporter Cell Development Service |
Linker的筛选及验证
在ADC药物开发中,Linker的结构会影响ADC的稳定性、同质性、细胞毒性效力、耐受性和药代动力学 (PK)等。因此,选择合适的Linker对于优化ADC的治疗潜力和安全性至关重要。Linker一般分为可裂解Linker和不可裂解Linker。目前的ADC研究主要集中在可裂解Linker上。而在可裂解Linker中,组织蛋白酶可裂解Linker是目前应用最广泛以及研究最深入的,此外还有多种Linker裂解酶处于研究阶段。
为了对ADC的Linker进行筛选及验证等,ACROBiosystems百普赛斯开发了一系列用于Linker酶切的蛋白酶,包括Cathepsin B、Cathepsin L、Cathepsin S、MMP-2、MMP-7、MMP-9、β-glucuronidase、β-galactosidase蛋白产品。
分子 | 货号 | 产品描述 | 订购/预购 |
---|---|---|---|
Cathepsin B | CTB-H5222 | Human Cathepsin B / CTSB Protein, His Tag (MALS verified) | |
Plasma Kallikrein/KLKB1 | KL1-H52H9 | Human Plasma Kallikrein / KLKB1 Protein, His Tag (active enzyme, MALS verified) | |
MMP-1 | MM1-H52H3 | Human MMP-1 Protein, His Tag (active enzyme, MALS verified) | |
MMP-9 | MM9-H5221 | Human MMP-9 Protein, His Tag (active enzyme) | |
MMP-9 | MM9-H5229 | Human MMP-9 Protein, His Tag (active enzyme) (MALS verified) | |
MMP-9 | MM9-H52H9 | Human MMP-9 (20-707) Protein, His Tag (active enzyme, MALS verified) | |
PLAU | PLU-H5228 | Human PLAU / uPA Protein, His Tag (activated by trypsin) (active enzyme) | |
PLAU | PLU-H5229 | Human PLAU / uPA Protein, His Tag | |
Cathepsin L | CAL-M52H3 | Mouse Cathepsin L / CTSL1 Protein, His Tag (MALS verified) | |
Cathepsin B | CTB-M52H9 | Mouse Cathepsin B / CTSB Protein, His Tag (MALS verified) | |
Plasma Kallikrein/KLKB1 | KL1-M52H9 | Mouse Plasma Kallikrein / KLKB1 Protein, His Tag | |
MMP-2 | MM2-M52H9 | Mouse MMP-2 (30-460) Protein, His Tag (active enzyme) | |
MMP-9 | MM9-M52H1 | Mouse MMP-9 (20-471) Protein, His Tag (active enzyme, MALS verified) | |
MMP-9 | MM9-C52H3 | Cynomolgus MMP-9 Protein, His Tag (active enzyme) |
临床/临床前PK分析
ADC其结构较传统小分子药物和抗体药物更加复杂,药物异质性更高,因此其PK研究也更为复杂。ADC药物的分析物通常包括总抗体(偶联和未偶联小分子毒素的抗体)、药物偶联抗体(至少偶联一个小分子毒素的抗体) 、抗体偶联药物、游离药物及其类似物。总抗体和药物偶联抗体通常使用ELISA(酶联免疫吸附测定,Enzyme-linked Immunosorbent Assay) 测定,偶联药物、游离药物及其分解代谢物通常用LC-MS(液相色谱-质谱法,Liquid Chromatograph Mass Spectrometer)来分析。
为了解决ADC药物PK分析中的挑战和难点,ACROBiosystems百普赛斯发布多种高质量、高亲和力的抗Payload抗体、抗独特型抗体及开发服务,这一系列产品可用于ADC进行临床前及临床阶段的PK检测,为提高ADC药物PK分析的准确性和可靠性提供了有力的支持和保障。
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