A673

The A673 cell line is a valuable resource in biological science. Derived from the muscle tissue of a 15-year-old female patient diagnosed with Ewings Sarcoma, this cell line exhibits a distinct polygonal morphology. Originally the cell line was thought to be derived from a rhabdomyosarcoma (RMS).

One of the remarkable characteristics of A673 cells is their ability to produce several growth factors that possess oncogenic potential. These cells also secrete growth-inhibitory factors, providing a balanced environment for cellular growth regulation. Such properties make A673 cells an excellent model for investigating the interplay between tumour-promoting and tumour-suppressing factors. A673 cells have demonstrated tumorigenic potential, as they can induce tumour formation in immunosuppressed mice.

Moreover, studies have identified hypermethylated promoters in cancer-related genes within the A673 cell line. These genetic alterations further contribute to its relevance in cancer research, offering a platform to explore epigenetic modifications and their impact on tumour development and progression.

While A673 cells are often referred to as Ewing tumour (ET) or sarcoma (ES), they are also associated with rhabdomyosarcoma (RMS). Notably, the A673 cell line harbours a complex karyotype with a specific translocation involving chromosomes 11 and 22. This translocation leads to the fusion of the EWS and FLI1 genes, which is a characteristic genetic event in Ewing Tumor.

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.