GC-1 spg

The GC-1 spg cell line was immortalized through transfection with the pSV3-neo plasmid, which harbors the coding sequences for the SV40 large T antigen and neomycin resistance. This genetic modification not only provides resistance to certain antibiotics but also promotes the continuous growth of the cells by altering their cell cycle regulation, thus bypassing the Hayflick limit typical of primary cells. This process of immortalization allows the cells to maintain proliferative capacity while retaining key phenotypic characteristics of spermatogonia.

Phenotypically, the GC-1 spg cell line exhibits characteristics that are indicative of a transitional stage between type B spermatogonia and primary spermatocytes, making it an especially relevant model for studying the early stages of spermatogenesis. The cells express two testis-specific isoproteins: cytochrome c and lactate dehydrogenase C4. These markers are crucial for studying cell metabolism and energy management during spermatogenesis, reflecting the unique metabolic pathways active in germ cells. The expression of these specific isoproteins underscores the cell line's utility in exploring the biochemical and physiological aspects of testicular cell function and development.

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.