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Advances in cell biology depend, partly, on the development of new cell lines and culture methods. Our research focused on a fibroblast-like cell line, "KSG," which is derived from scorpionfish fin tissue (Sebastiscus marmoratus). Cells were grown in Leibovitz's L-15 medium with 10% fetal bovine serum following standard procedures. The optimum growth temperatures for these lines ranged from 15°C to 25°C. All cells survived storage for at least 3 yr at -80°C. Subsequently, they were continuously cultured until the 78th generation without evident changes in their morphology. Moreover, we were able to culture KSG cells in the absence of fetal bovine serum in a culture medium containing the fish serum "SeaGrow." Optimum SeaGrow concentrations for these cells ranged from 5% to 20%. The growth rate of KSG cells decreased when the concentration of SeaGrow was reduced to 1%. However, this decrease could be partially reversed by adding 0.5% "Hy-Fish." In addition, the inclusion of Hy-Fish improved cell adhesion. KSG cells that were cultured in serum-free culture media containing 0.5% and 1% Hy-Fish had been added and were able to survive at low densities. Furthermore, we successfully transfected this cell line with a commercial plasmid vector coding a fluorescent protein using the cationic lipid. Finally, the analyses of cell behavior under hydrostatic pressure showed that some pressures (10 MPa) helped the cells to proliferate more.

in vitro cellular and developmental biology. animal

Characteristics of established KSG cells derived from the scorpionfish Sebastiscus marmoratus: what happens under the hydrostatic pressure like the deep sea?