AbDrop™单B细胞抗体开发平台

AbDrop™单B细胞抗体开发平台

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。

我们的优势

高容量功能性筛选
高容量功能性筛选

(2x10E6个浆细胞)

周期快速
周期快速

(至少节省2-3个月)

天然配对
天然配对

AbDrop™单B细胞抗体开发平台流程


AbDrop™单B细胞抗体开发平台 Working Flowchart

AbDrop™单B细胞抗体开发平台

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


AbDrop™单B细胞抗体开发服务案例

Case 1: Anti-PD1 Antibody Discovery

Of 62 mAbs expressed, 59 showed good target-binding activity (tested by ELISA).


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Of the 59 mAbs, 53 Abs have affinity superior to benchmark antibody (positive control).


Ligand1:1 binding ka (1/Ms)kd (1/s)KD (M)
Ab14.26E+051.78E-044.18E-10
Ab24.37E+051.86E-044.25E-10
Ab33.67E+051.76E-044.80E-10
Ab42.27E+051.12E-044.92E-10
……………………
Positive control2.46E+051.48E-036.01E-09
Ab541.90E+051.59E-038.38E-09
……………………
Ab591.00E+052.14E-032.14E-08


Diversity analysis indicated excellent CDR protection.


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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.


Case 2: Anti-TAA Antibody Discovery

Of 70 mAbs expressed, 45 showed good target-binding activity (tested by ELISA).


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Six molecules (samples) evaluated in cell-based blocking assay showed better blocking activity than positive control antibody.


single-case2-4.pngNo.IC50maximum inhibition rate
Sample16.6290.96%
Sample25.9190.14%
Sample384.8887.33%
Sample411.1885.69%
Sample532.2187.77%
Sample652.8580.63%
Positive Control329.2/


PCR结果

PCR结果.png

仪器设备

单B细胞抗体开发仪器
单B细胞抗体开发仪器
单B细胞抗体开发仪器
单B细胞抗体开发仪器
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