CHO Cells
These mammalian cells are derived from the ovary of the Chinese hamster and are known for their ability to efficiently express and secrete recombinant proteins.
CHO cells are a versatile tool for the development of therapeutic antibodies, vaccines, and other biopharmaceutical products.
Researchers utilize CHO cells to study cellular processes, optimize expression systems, and evaluate the safety and efficacy of potential drug candidates.
With their well-characterized growth characteristics and post-translational modification capabilities, CHO cells remain a pivotal model system for advanceing biopharmaceutical discovry and manufactoring.
Experiance the power of CHO cell research with PubCompare.ai, your AI-driven platform for optimizing protocols and identifying the most effective methods.
Most cited protocols related to «CHO Cells»
For consecutive targeting of the KRAS locus, K562 cells were subjected to fluorescence-activated cell sorting (FACS) 3 days after nucleofection for isolation of the 2% most highly GFP fluorescent cells that were then cultured for about 1 week. Thereafter, an aliquot of the cell pool was analysed by IDAA (first hit), whereas the rest of the cells were subjected to another two rounds of nucleofection and FACS to produce second and third hit pools, respectively, Furthermore, after the third hit, cells were also single-cell plated in 96-well plates and expanded to clonal cell lines.
We have compared 2D (epi-fluorescence microscopy) and 3D (confocal fluorescence microscopy) CHO micrographs, and found that CHO cells are flat and most of the mitochondria in 2D micrographs are in focus and clear enough for high content image analysis (see Section S2.1 in
Most recents protocols related to «CHO Cells»
Example 10
This example provides in vitro IC50 data for the blocking of the interaction between recombinant human PD-1 (PD-1-Fc Chimera; Sino Biologics) and human PD-L1 expressed CHO cells by anti-PD-L1 antibody G12. Here, CHO cells expressing PD-L1 were pre-incubated with G12 prior to the addition of rhPD-1-Fc chimeric protein. After incubation and washing, PD-1 binding to cell surface expressed PD-L1 was detected using an Alexa-Fluor 647 tagged anti-PD-1 antibody by flow cytometry (Intellicyt HTFC; FL-4H). This example shows that anti-PD-L1 monoclonal antibody G12 was able to inhibit efficiently the binding of PD-1 to PD-L1 expressed on the surface of CHO cells.
Results: As shown in
Example 6
Aim and Background
The aim of this study was to assess the binding of the CD40-CEA RUBY™ bispecific antibodies to CEACAM5 expressed on cells and evaluate potential cross-reactivity to CEACAM1. In this study both CEACAM5 transfected cells and human tumor cells with endogenous CEACAM5 expression were used.
Materials and Methods
The human CEACAM5 and CEACAM1 genes were cloned into pcDNA3.1, and the vector was subsequently stably transfected into CHO cells. The tumor cell line MKN45, expressing high levels of CEACAM5, LS174T expressing intermediate levels of CEACAM5, and HT29 and LOVO expressing low levels of CEACAM5 (Table 16), CHO-CEACAM5, CHO-CEACAM1 and to CHO wt cells were incubated with titrated concentrations of CD40-CEA bispecific antibodies. Binding of the antibodies was detected using fluorochrome-conjugated anti-human IgG and analyzed using flow cytometry.
Results and Conclusions
The data demonstrate that all tested CD40-CEACAM5 RUBYs bind to CEACAM5 expressed on CHO-CEACAM5 (
Example 7
The development of fully human monoclonal antibodies directed against human IL-17RA was carried out using Abgenix (now Amgen Fremont Inc.) XenoMouse® technology (U.S. Pat. Nos. 6,114,598; 6,162,963; 6,833,268; 7,049,426; 7,064,244, which are incorporated herein by reference in their entirety; Green et al, 1994, Nature Genetics 7:13-21; Mendez et al., 1997, Nature Genetics 15:146-156; Green and Jakobovitis, 1998, J. Ex. Med. 188:483-495)). TABLE 4 shows the portions of the IL-17RA protein used as an immunogen and cell lines used to generate and screen anti-IL-17RA antibodies.
IgG2 XenoMouse® mice were immunized/boosted with IL-17RA-Fc (group 1) and IL-17RA-FLAG-polyHis (group 2). Serum titers were monitored by ELISA and mice with the best titers were fused to generate hybridomas. The resulting polyclonal supernatants were screened for binding to IL-17RA by ELISA, and the positive supernatants were screened for binding to IL-17RA CHO cells by FMAT. Positive supernatants were subjected to additional screening. IgG2 XenoMouse® mice were immunized with the following immunogens: IL-17RA-Fc (group 3) and IL-17RA-FLAG-pHis (group 4) and were tested following additional immunizations.
Example 3
Example 3
The potency of 88D2C6 and 137D1H10, along with 370D2C10 (all fused to human IgG1 constant regions, with ADCC-activating mutations in Fc), in mediating ADCC was measured with CCR8-overexpressing CHO K1 and U2OS cells. All three antibodies exhibited high ADCC activities (
All three antibodies exhibited potent ADCC activities. Among them, however, 88D2C6 had considerably higher potency (EC50: 0.01743 nM with CHO cells and 0.1108 for U2OS cells).
Top products related to «CHO Cells»
More about "CHO Cells"
These cells, derived from the ovary of the Chinese hamster, are renowned for their ability to efficiently express and secrete recombinant proteins, making them a crucial tool for the development of therapeutic antibodies, vaccines, and other biopharmaceutical products.
Researchers leveraging CHO cells can study cellular processes, optimize expression systems, and evaluate the safety and efficacy of potential drug candidates.
The well-characterized growth characteristics and post-translational modification capabilities of CHO cells make them a pivotal model system for advancing biopharmaceutical discovery and manufacturing.
Fetal Bovine Serum (FBS) is commonly used as a growth supplement in CHO cell culture media, providing essential nutrients and growth factors.
Lipofectamine 2000, a transfection reagent, is often utilized to facilitate the introduction of genetic material into CHO cells.
Dulbecco's Modified Eagle Medium (DMEM) is a widely used basal medium for CHO cell culture, supplemented with penicillin, streptomycin, and L-glutamine to support cell growth and survival.
The CHO-K1 cell line is a commonly used subclone of the original CHO cell line, known for its robust growth characteristics and ease of genetic manipulation.
GlutaMAX, a stable L-glutamine alternative, is also frequently employed in CHO cell culture to provide a reliable source of this essential amino acid.
Experiance the power of CHO cell research with PubCompare.ai, your AI-driven platform for optimizing protocols and identifying the most effective methods.