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

Development of methods for the quantitative in vitro analysis of androgen-dependent and autonomous Shionogi carcinoma 115 cells.

Androgen-dependent and androgen-independent (autonomous), cloned, cultured cell lines of the androgen-dependent mouse mammary adenocarcinoma, Shionogi carcinoma 115, have been established. Growth of the dependent cells requires the presence of androgen, provided they are growth in suspension culture in medium containing dextran-charcoal-treated fetal calf serum. The growth rate of autonomous cells in the presence or absence of DHT is similar to that of dependent cells grown in its presence. An agar culture method has been developed that enables the proportion of dependent and autonomous cells in mixed populations to be determined. Autonomous cells appear in dependent clones, and their frequency increases with increasing time of subculture. Dependent cells form tumors preferentially in male animals and dependent cell cytosols contain significant amounts (approximately 300 femtomoles per mg protein) of a specific androgen-binding macromolecule. Autonomous cells formed tumors equally well in both male and female mice, and autonomous cell cytols contain very low levels (less than or equal to 7 femtomoles per mg protein) of the specific androgen-binding macromolecule(s). These studies delineate a system which can be used to investigate the mechanism of steroid hormone-dependent and autonomous tumor growth, and the transitions between the hormone-dependent and autonomous states.[1]


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