Collagen processing in ras-transfected mouse mammary epithelial cells

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A mouse mammary epithelial cell line (NMuMG), after transfection with the c-rasHoncogene, forms invasive tumors in nude mice. NMuMG and NMuMG p-rasHcells produce similar amounts of collagen (mostly type IV) when grown on plastic. NMuMG cells respond to growth on collagen gels by increasing the rate of collagen synthesis and deposition by 100%, unlike NMuMG p-rasHcells which synthesize similar amounts of collagen whether grown on plastic or collagen gels. These results suggest that ras transformation partially inhibits the interaction between epithelial cells and the surrounding stroma that is necessary for basement membrane deposition in vivo and consequently may facilitate the invasion of the stroma by transfected cells. © 1986.




Warburton, M. J., Ferns, S. A., & Hynes, N. E. (1986). Collagen processing in ras-transfected mouse mammary epithelial cells. Biochemical and Biophysical Research Communications, 137(1), 161–166.

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