NCH690

The NCH640 cell line is a glioblastoma stem-like cell model used in research to explore the mechanisms of tumor resistance, cellular survival under stress, and therapeutic responses. Glioblastoma, one of the most aggressive forms of brain tumors, is difficult to treat due to its resistance to therapy and adaptation to a hostile microenvironment. NCH640 is cultured in specialized media such as Neurobasal A with supplements like B27, and its growth is supported by essential growth factors like EGF and FGF-2. It is often used alongside other glioma stem cell models, such as NCH690 and NCH644, to investigate these biological phenomena.

The research on NCH640 focuses heavily on its resistance mechanisms, particularly under hypoxic conditions. Glioma cells like NCH640 show significant reliance on metabolic adaptations, including altered reactive oxygen species (ROS) regulation. Studies have demonstrated that targeting pathways such as the integrated stress response (ISR) in NCH640 and related cell lines may improve their sensitivity to therapies like temozolomide, which is commonly used in glioblastoma treatment. These findings are important for devising new strategies to overcome the inherent resistance of glioma stem-like cells to standard therapeutic interventions.

37°C, 5% CO₂, humidified atmosphere.

1. Confirm that the vial remains deeply frozen upon delivery, as cells are shipped on dry ice to maintain optimal temperatures during transit.

2. Upon receipt, either store the cryovial immediately at temperatures below -150°C to ensure the preservation of cellular integrity, or proceed to step 3 if immediate culturing is required.

3. For immediate culturing, swiftly thaw the vial by immersing it in a 37°C water bath with clean water and an antimicrobial agent, agitating gently for 40-60 seconds until a small ice clump remains.

4. Perform all subsequent steps under sterile conditions in a flow hood, disinfecting the cryovial with 70% ethanol before opening.

5. Carefully open the disinfected vial and transfer the cell suspension into a 15 ml centrifuge tube containing 8 ml of room-temperature culture medium, mixing gently.

6. Centrifuge the mixture at 300 x g for 3 minutes to separate the cells and carefully discard the supernatant containing residual freezing medium.

7. Gently resuspend the cell pellet in 10 ml of fresh culture medium. For adherent cells, divide the suspension between two T25 culture flasks; for suspension cultures, transfer all the medium into one T25 flask to promote effective cell interaction and growth.

8. Adhere to established subculture protocols for continued growth and maintenance of the cell line, ensuring reliable experimental outcomes.

Mycoplasma contamination is excluded using both PCR-based assays and luminescence-based mycoplasma detection methods.

To ensure there is no bacterial, fungal, or yeast contamination, cell cultures are subjected to daily visual inspections.

For long-term preservation, place vials in vapor-phase liquid nitrogen at about −150 to −196 °C. Storage at −80 °C is acceptable only as a short interim step before transfer to liquid nitrogen.

Cryopreserved cell lines are shipped on dry ice in validated, insulated packaging with sufficient refrigerant to maintain approximately −78 °C throughout transit. On receipt, inspect the container immediately and transfer vials without delay to appropriate storage.

At Cytion, we stand behind the quality and viability of our products. We guarantee that our cells will be viable at the start of culture for 60 days after shipment from our facilities. We assure that all materials conform to the specifications described in the Certificate of Analysis and/or Product Sheet.

For full details, please refer to our Warranty Statement.