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- Genetically modified cell lines best reflect MOA (Mechanism of Action)
- Higher activity and larger assay window for robust and reproducible cell-based bioassay
- Comprehensive application data to support assay development and validation
- Full tracible record, stringent quality control and validated cell passage stability
- Parental cell line legally obtained from internationally recognized cell resource bank and commercially licensed
- Global commercial license assistance whenever regulatory filing is required
描述（Description）
The CHO/Human CD32b Stable Cell Line was engineered to express full length human CD32b receptor (Gene ID: 2213), with different levels of CD32b expression (High, Medium, Low), which can be used to test agonist antibody whether in a CD32b-dependent manner to strengthen the agonistic activity. When co-cultured with Human 4-1BB HEK293 Reporter Cell and anti-4-1BB agonist antibody, the anti-4-1BB antibody can be crosslinked, thereby strengthening 4-1BB pathway-activated luminescence.
应用说明（Application）
• Useful for cell-based CD32b binding assay
• Useful for CD32b-mediated crosslinking
生长特性（Growth Properties）
Adherent
筛选标记（Selection Marker）
Hygromycin B (20 μg/mL)
培养基（Complete Growth Medium）
F-12K+ 10% FBS
冻存液（Freeze Medium）
Serum-free cell cryopreservation medium
装量（Quantity）
1 vial contains at least 5×10^6 cells in 1 mL serum-free cryopreservation medium
存储（Storage）
Frozen in liquid nitrogen.
支原体检测（Mycoplasma Testing）
Negative
无菌检测（Sterility Testing）
Negative
使用说明（Instructions for Use）
See data sheet for detailed culturing and assay protocol.
产品数据图
Receptor Assay
Expression analysis of human CD32b on CHO/Human CD32b Stable Cell Line by FACS.
Cell surface staining using PE/Cy7-labeled anti-human CD32b antibody was performed on CHO/Human CD32b Stable Cell Line with different expression levels: CHO/Human CD32b Stable Cell Line (Low Expression); CHO/Human CD32b Stable Cell Line (Medium Expression); CHO/Human CD32b Stable Cell Line (High Expression).
Protocol
Application
Bioactivity analysis of anti-human 4-1BB antibody through CHO/Human CD32b Stable Cell Line (Medium Expression) crosslinking to test whether in a CD32b-dependent manner to strengthen the agonistic activity.
The EC50 of anti-human 4-1BB antibody is approximately 0.18 μg/mL through CHO/Human CD32b Stable Cell Line (Medium Expression) crosslinking.
Protocol
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背景
Receptors for the Fc region of IgG (Fc γ R) are members of the Ig superfamily that function in the activation or inhibition of immune responses. Three classes of human Fc γ Rs: RI (CD64), RII (CD32), and RIII (CD16), which generate multiple isoforms, are recognized. There are three genes for human Fcγ RII /CD32 (A, B, and C) and one for mouse Fcγ RII B (CD32B). CD32 is a low affinity receptor for IgG. Low affinity immunoglobulin gamma Fc region receptor II-b (FCGR2B) is also known as CD32b, FCG2, IGFR2. CD32B is expressed on B cells and myeloid dendritic cells. Ligation of CD32B on B cells downregulates antibody production and may, in some circumstances, promote apoptosis. Co-ligation of CD32B on dendritic cells inhibits maturation and blocks cell activation. CD32B may also be a target for monoclonal antibody therapy for malignancies.
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