KC

KC (Kc167) is a Drosophila melanogaster embryonic cell line derived from a dorsal closure stage female embryo. The line was originally established and has been widely used in Drosophila cell biology, genetic screens, and functional genomics. Kc167 cells have been immortalized with SV40 and grow semi-adherently, forming a mixed population of attached and loosely floating cells. They are among the best-characterized Drosophila cell lines and are fully amenable to RNAi-mediated gene silencing, making them a cornerstone model for genome-wide RNAi screens in invertebrate biology.

KC cells are applicable in Drosophila cell biology, genome-wide RNAi and CRISPR screens, signal transduction pathway studies (Wnt/Wingless, Hedgehog, Notch, JAK/STAT, Toll/NF-κB), innate immunity research, and comparative studies of evolutionarily conserved pathways. The fully sequenced and annotated Drosophila genome, combined with extensive public databases of RNAi reagents (e.g., DRSC/TRiP), makes KC cells particularly powerful for unbiased functional genomic discovery. BSL-2 classification applies due to the SV40 immortalization.

25°C, ambient air (no CO₂ required).

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.

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.