Abstract
Metastasis to the liver is a frequent event in clinical oncology, the molecular mechanisms of which are not fully understood. We have recently reported a consistent overexpression of c-met in B16 melanoma cells selected in vivo for enhanced liver metastatic ability. In this study we address the question as to whether constitutive activation of c-met is a necessary and sufficient condition for enhanced liver colonization B16 melanoma cells. Different levels of c-met expression and/or activation in B16 cells were achieved subcloning, or by c-DNA transfection with either HGF/SF or the oncogenic form of c-met (tpr-met). Metastatic ability of the different populations was then evaluated in vivo by the lung colonization (experimental metastasis) assay. Results indicate that c-met (but not tpr-met) activation in B16 melanoma cells may increase their liver colonizing potential, probably by enhancing motility and invasion in response paracrine interactions with its ligand. C-met expres sion per se, however, is not able to change the organ specificity of the cells. C-met activation appears instead to be required at later stages of liver colonization by B16 melanoma cells, in order to enhance their site-specific metastatic ability. © Rapid Science 1998
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Lin, S., Rusciano, D., Lorenzoni, P. et al. C-met activation is necessary but not sufficient for liver colonization by B16 murine melanoma cells. Clin Exp Metastasis 16, 253–265 (1998). https://doi.org/10.1023/A:1006596909948
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DOI: https://doi.org/10.1023/A:1006596909948