COS-1

COS-1 cells, a fibroblast-like cell line derived from African green monkey kidney tissue, have revolutionized the field of biological science since their development in 1981 by J.W.F. Cowell and colleagues. These cells offer an excellent platform for studying various aspects of cellular biology, including protein expression and protein-protein interactions.

One of the critical advantages of COS-1 cells is their remarkable ability to express exogenous proteins, making them an invaluable tool for producing recombinant proteins and investigating protein-related phenomena. The constitutively active c-src gene and the presence of SV40's large T-antigen enhance translation efficiency, resulting in elevated levels of protein expression within these cells.

Researchers have extensively utilized COS-1 cells to study the cytopathic effects of viruses and host cell responses to viral infections. COS-1 cells are susceptible to various viruses, including herpes simplex, vesicular stomatitis, and influenza A. This characteristic makes COS-1 cells an excellent model system for exploring viral pathogenesis, host cell responses, and the development of antiviral drugs.

Furthermore, the COS-1 cell line has significantly contributed to our understanding of various biological mechanisms. Its popularity in molecular and cell biology research arises from its proficiency in expressing exogenous proteins and its permissiveness to different viral strains. These attributes allow scientists to delve into the intricate workings of cellular processes with precision and reliability.

The COS cell lines are derived from the CV-1 cells, which originated from the kidney of the African green monkey. Through immortalization with a modified SV40 virus capable of producing large T antigen, the COS cells maintain their fibroblast-like morphology and inherit the beneficial properties of the SV40 genetic material.

COS-1 and COS-7 are the most commonly used variants among the COS cell lines. Researchers frequently employ these cell lines when investigating the monkey virus SV40 and conducting molecular biology, biochemistry, and cell biology experiments.

The COS-1 cells, in particular, exhibit remarkable potential for protein expression through transfection with an SV40 origin of replication. The large T antigen these genetically modified COS-1 cells produce allows for substantial images of introduced vectors, facilitating efficient recombinant protein production.

COS-1 cells are pivotal in advancing our understanding of complex biological processes. With their origin in African green monkey kidney tissue and their fibroblast morphology, these cells provide a reliable and versatile platform for many scientific applications.

Their extensive usage, as evidenced by over 1,400 product citations, underscores their significance in various research areas. As for practical considerations, COS-1 cells have a doubling time of approximately 48 hours, enabling efficient cell culture and experimental procedures. Additionally, these cells are categorized as animal cells and belong to the Cercopithecus aethiops organism, with the kidney as the origin tissue.

COS-1 cells stand at the forefront of cutting-edge biological research, facilitating breakthroughs in our understanding of molecular and cellular processes. With their exceptional capacity for protein expression, susceptibility to viral infections, and significance in diverse fields of study, COS-1 cells remain a cornerstone of scientific inquiry.

Researchers continue to leverage the remarkable properties of COS-1 cells to unravel the intricacies of biological mechanisms and pave the way for new advancements in physical science.

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.