Premium
Homotypic cell–cell contacts stimulate the motile activity of rat prostate cancer cells
Author(s) -
Madeja Z.,
Miȩkus K.,
Sroka J.,
Djamgoz M.B.A.,
Korohoda W.
Publication year - 2001
Publication title -
bju international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.773
H-Index - 148
eISSN - 1464-410X
pISSN - 1464-4096
DOI - 10.1046/j.1464-410x.2001.02349.x
Subject(s) - motility , cell , contact inhibition , cancer cell , cell culture , video microscopy , microbiology and biotechnology , cell migration , biology , displacement (psychology) , chemistry , cancer , medicine , psychology , biochemistry , genetics , psychotherapist
Objective To characterize the effect of homotypic cell‐to‐cell collisions upon the motile activities of two rat prostatic cancer cell lines of markedly different metastatic potential. Materials and methods The movements of strongly and weakly metastatic MAT‐LyLu and AT‐2 cells, respectively, were recorded under an inverted microscope at 37 °C. The motile activities of the cells at various cell densities were characterized quantitatively by computer‐aided tracking methods and image analysis. The following variables were assessed: speed of movement, final displacement, coefficient of movement efficiency, diffusion constant and positive flow. Results MAT‐LyLu and AT‐2 cells showed only limited motile activity in sparse cultures where there was little contact amongst the cells. However, under these and all other subsequent conditions tested, the motile activity of the MAT‐LyLu cells was higher than the AT‐2 cells. As the density of the cultured cells was increased (leading to more cell‐to‐cell contacts) there was a significant increase in motility. This effect was more pronounced for the AT‐2 than for the MAT‐LyLu cells, resulting in visible acceleration of movement by direct physical contact among the colliding cells. The motile activities of the tumour cells was only slightly affected by conditioned media. Conclusion Homotypic collisions between migrating prostatic cancer cells can strongly stimulate their motility. The effect of increased contact is greater on the weakly metastatic cells, such that at high cell density, the difference in the motilities of weak and strong metastatic cells is greatly reduced.