膜杰作
Star Staining
描述（Description）
The CHO/Human CD32a Stable Cell Line was engineered to express full length human CD32a receptor (Gene ID: 2212), with different levels of CD32a expression (High, Medium, Low), which can be used to test agonist antibody whether in a CD32a-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 CD32a binding assay
• Useful for CD32a-mediated crosslinking
生长特性（Growth Properties）
Adherent
筛选标记（Selection Marker）
Hygromycin (20 μg/mL)
培养基（Culture 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.
Receptor Assay
Expression analysis of human CD32a on CHO/Human CD32a Stable Cell Line by FACS.
Cell surface staining using PE-labeled anti-human CD32a antibody was performed on CHO/Human CD32a Stable Cell Line with different expression levels: CHO/Human CD32a Stable Cell Line (Low Expression); CHO/Human CD32a Stable Cell Line (Medium Expression); CHO/Human CD32a Stable Cell Line (High Expression).
Protocol
Application
Bioactivity analysis of anti-human 4-1BB antibody through CHO/Human CD32a Stable Cell Line (Medium Expression) crosslinking to test whether in a CD32a-dependent manner to strengthen the agonistic activity.
The EC50 of anti-human 4-1BB antibody is approximately 0.05 μg/mL through CHO/Human CD32a Stable Cell Line (Medium Expression) crosslinking.
Protocol
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背景（Background）
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. The activating isoform, CD32A, is expressed on monocytes, neutrophils, platelets and dendritic cells. CD32A is expressed on many immune cell types (macrophage, neutrophil, eosinophils, platelets, dendritic cells and Langerhan cells), where inhibitory ITIMbearing receptors may also be coexpressed and coengaged by specific ligands. CD32A delivers an activating signal upon ligand binding, and results in the initiation of inflammatory responses including cytolysis, phagocytosis, degranulation and cytokine production. The responses can be modulated by signals from the coexpressed inhibitory receptors such as CD32B, and the strength of the signal is dependent on the ratio of expression of the activating and inhibitory receptors.
Permits & Restrictions
This cell line is provided for research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use. You are not allowed to share, distribute, sell, modify, sublicense, or otherwise make this cell line available for use to other laboratories, departments, research institutions, hospitals, universities, or biotech companies. AcroBiosystems does not warrant the suitability of this cell line for any particular use, and does not accept any liability in connection with the handling or use of this cell line.
