杂交瘤细胞技术、噬菌体展示技术、单个B细胞技术是抗体开发的三大类技术。与杂交瘤细胞技术相比,单个浆细胞(Plasma B Cell)抗体开发技术不仅在开发周期上更有优势,同时能够保证抗体的轻重链天然配对,是近几年比较受欢迎的抗体开发技术。
百英拥有先进的AbDrop™基于微液滴的单B细胞抗体开发平台,为您节省至少2个月的抗体开发周期,同时保证性价比。
杂交瘤细胞技术、噬菌体展示技术、单个B细胞技术是抗体开发的三大类技术。与杂交瘤细胞技术相比,单个浆细胞(Plasma B Cell)抗体开发技术不仅在开发周期上更有优势,同时能够保证抗体的轻重链天然配对,是近几年比较受欢迎的抗体开发技术。
百英拥有先进的AbDrop™基于微液滴的单B细胞抗体开发平台,为您节省至少2个月的抗体开发周期,同时保证性价比。
(2x10E6个浆细胞)
(至少节省2-3个月)
阶段 | 服务详情 | 交付内容 | 周期 |
---|---|---|---|
免疫方案设计抗原准备(可选) | ▸抗原表达(可选) ▸抗原检测 | / | 2-3个月 |
动物免疫 | 小鼠(BALB/c) 10只 | / | |
单个B细胞分选 | 1轮抗原结合筛选 | / | |
单个B细胞测序 | 反转录和PCR | 保证交付20个Unique序列 | |
高通量哺乳动物表达 | ▸上清ELISA检测 ▸其他功能ELISA(可选) | 上清的结合检测数据结果 | |
抗体纯化与鉴定 | 抗体纯化 ▸Biacore亲和力检测(可选) ▸功能细胞株开发(可选) ▸FACS检测(可选) | 交付0.5-1mg抗体 ▸SDS-PAGE>95% ▸SEC-HPLC ▸内毒素<1EU/mg ▸ELISA Binding检测 |
Of 62 mAbs expressed, 59 showed good target-binding activity (tested by ELISA).
Of the 59 mAbs, 53 Abs have affinity superior to benchmark antibody (positive control).
Ligand | 1:1 binding ka (1/Ms) | kd (1/s) | KD (M) |
---|---|---|---|
Ab1 | 4.26E+05 | 1.78E-04 | 4.18E-10 |
Ab2 | 4.37E+05 | 1.86E-04 | 4.25E-10 |
Ab3 | 3.67E+05 | 1.76E-04 | 4.80E-10 |
Ab4 | 2.27E+05 | 1.12E-04 | 4.92E-10 |
…… | …… | …… | …… |
Positive control | 2.46E+05 | 1.48E-03 | 6.01E-09 |
Ab54 | 1.90E+05 | 1.59E-03 | 8.38E-09 |
…… | …… | …… | …… |
Ab59 | 1.00E+05 | 2.14E-03 | 2.14E-08 |
Diversity analysis indicated excellent CDR protection.
We analyzed the diversity of CDR sequences of the light and heavy chains of 59 Antibodies and showed good diversity. | Epitope binning of all antibodies and found these hits can mainly be divided into 4 epitope groups. B6924 (Nivolumab biosimilar) and B2014 (Pembrolizumab biosimilar) are positive controls. The result showed that we have identified many antibodies binding to distinct epitopes on PD-1 compared to controls. |
Of 70 mAbs expressed, 45 showed good target-binding activity (tested by ELISA).
Six molecules (samples) evaluated in cell-based blocking assay showed better blocking activity than positive control antibody.
No. | IC50 | maximum inhibition rate | |
---|---|---|---|
Sample1 | 6.62 | 90.96% | |
Sample2 | 5.91 | 90.14% | |
Sample3 | 84.88 | 87.33% | |
Sample4 | 11.18 | 85.69% | |
Sample5 | 32.21 | 87.77% | |
Sample6 | 52.85 | 80.63% | |
Positive Control | 329.2 | / |
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