KC-5713

293T-EGFR-cMET-KO-mouse-EGFR Cell Line

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Background of 293T-EGFR-cMET-KO-mouse-EGFR Cell Line

EGFR, the Epidermal growth factor receptor, is a cell-surface receptor tyrosine kinase, and activated by binding of its specific ligand, such as epidermal growth factor (EGF) and transforming growth factor alpha (TGF-alpha), EGFR overexpression or overactivity have associated with a number of cancers, including the lung cancer and colon cancer. The identification of EGFR as a driver gene has led to the development of anticancer therapeutics agents, including Gefitinib, Erlotinib, Afatinib, Osimertinib (AZD9291) and cetuximab.

Specifications

Catalog Number	KC-5713
Cell Line Name	293T-EGFR-cMET-KO-mouse-EGFR Cell Line
Clone Number	2#
Host Cell Line	293T-EGFR-cMET-KO
Description	Stable 293T EGFR cMET KO cell line expressing exogenous mouse EGFR genes
Quantity	Two vials of frozen cells (≥2-10⁶/vial)
Stability	Stable in culture over a minimum of 10 passages
Application	Drug screening and biological assays
Freezing Medium	70% DMEM + 20% FBS + 10% DMSO
Propagation Medium	DMEM + 10% FBS + 1ug/mL Puromycin
Selection Marker	Puromycin
Morphology	Epithelial
Subculture	Split saturated culture 1:4-1:5 every 2-3 days; seed out at about 1-3 × 10⁵ cells/mL
Incubation	37 °C with 5% CO₂
Storage	Liquid nitrogen immediately upon receiving
Doubling Time	Approximately 30 hours
Mycoplasma Status	Negative

Cell Line Generation

293T EGFR cMET KO mouse EGFR cell line was generated using a lentiviral vector expressing the mouse EGFR sequence.

Characterization

Figure 1: Characterization of mouse EGFR overexpression in the 293T EGFR cMET KO mouse EGFR stable clone using PCR sequence.

Figure 2: Characterization of mouse EGFR overexpression in the 293T EGFR cMET KO mouse EGFR stable clone using FACS.

Cell Resuscitation

1. Prewarm culture medium (DMEM + 10% FBS + 1ug/mL Puromycin)in a 37°C water bath.
2. Thaw the frozen vial in a 37°C water bath for 1-2 minutes.
3. Transfer the vial into biosafety cabinet, and wipe the surface with 70% ethanol.
4. Unscrew the top of the vial and transfer the cell suspension gently into a sterile centrifuge tube containing 9.0mL complete culture medium.
5. Spin at ~ 125 × g for 5-7 minutes at room temperature, and discard the supernatant without disturbing the pellet.
6. Resuspend cell pellet with the appropriate volume of complete medium and transfer the cell suspension into a T25 culture flask.
7. Incubate the flask at 37°C, 5% CO₂ incubator.
8. Split saturated culture 1:4-1:5 every 2-3 days; seed out at about 1-3 × 10⁵ cells/mL.

Cell Freezing

1. Prepare the freezing medium (70% DMEM + 20% FBS + 10% DMSO) fresh immediately before use.
2. Keep the freezing medium on ice and label cryovials.
3. Transfer cells to a sterile, conical centrifuge tube, and count the cells.
4. Centrifuge the cells at 250×g for 5 minutes at room temperature and carefully aspirate off the medium.
5. Resuspend the cells at a density of at least 3×10⁶ cells/mL in chilled freezing medium.
6. Aliquot 1 mL of the cell suspension into each cryovial.
7. Freeze cells in the CoolCell freezing container overnight in a -80°C freezer.
8. Transfer vials to liquid nitrogen for long-term storage.

References

1. Ji, H. et al. Epidermal growth factor receptor variant III mutations in lung tumorigenesis and sensitivity to tyrosine kinase inhibitors. Proc Natl Acad Sci USA 103, 7817–7822 (2006).
2.Pedersen, M. W., Meltorn, M., Damstrup, L. & Poulsen, H. S. The type III epidermal growth factor receptor mutation. Annals of Oncology 12, 745–760 (2001).