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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Establishment of human oral-cancer cell lines (KOSC-2 and -3) carrying p53 and c-myc abnormalities by geneticin treatment.

Two cultured cell lines derived from human squamous-cell carcinomas were established through xenografted tumors in nude mice by "Geneticin" treatment, which allows to eliminate contaminated mouse fibroblasts and obtain enriched tumor cells at the early stage of cultivation. Line KOSC-2 and KOSC-3 were each derived from a squamous-cell carcinoma of the oral floor and of the lower gingiva, respectively. Both lines grew in a cobblestone pattern, demonstrating their epithelial heritage. Giemsa-banding patterns by chromosome analysis confirmed that both lines are of human origin. Molecular analysis of cancer-related genes, including the Ha-ras, c-myc and p53 genes, was performed. KOSC-3 cells showed co-over-expression of p53 and c-myc mRNA, in addition to p53 point mutation at codon 248 with transition from CGG to TGG. However, loss of heterozygosity (LOH) on chromosome 17 was detected in both lines by Southern blotting. These cell lines provide a model for elucidating the mechanism involving p53 inactivation and c-myc-gene over-expression.[1]

References

  1. Establishment of human oral-cancer cell lines (KOSC-2 and -3) carrying p53 and c-myc abnormalities by geneticin treatment. Inagaki, T., Matsuwari, S., Takahashi, R., Shimada, K., Fujie, K., Maeda, S. Int. J. Cancer (1994) [Pubmed]
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