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

Anchorage-independent colony formation of SV40 transformed BALB/c-3T3 cells in serum-free medium: role of cell- and serum-derived factors.

The colony-forming response of SV40 transformed BALB/c-3T3 cells in agarose suspension culture was studied in a serum-free medium (with insulin, transferrin and serum albumin as the only macromolecular supplements) that was optimized for colony formation of fibronectin-attached monolayer cultures. In this serum-free medium, the SV3T3 cells fail to form colonies in agarose suspension. However, they can be induced to anchorage-independent colony formation by the growth factors that are additionally required by their untransformed counterparts for proliferation in monolayer culture. The SV3T3 cells are also rendered anchorage-independent for colony formation in serum-free medium by conditioned medium from dense monolayer serum-free SV3T3 cultures. These experiments suggest that it is the cell-substrate interaction that is responsible for the growth factor autonomy of fibronectin-attached transformed cells.[1]

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