Tetrodotoxin suppresses morphological enhancement of the metastatic MAT-LyLu rat prostate cancer cell line |
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Authors: | S P Fraser Y Ding A Liu C S Foster M B A Djamgoz |
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Institution: | (1) Department of Biology, Neurobiology Group, Imperial College of Science, Technology and Medicine, London SW7 2AZ, UK Tel.: +44 171 594 5441; Fax: +44 171 584 2056; e-mail: s.p.fraser@ic.ac.uk, GB;(2) Department of Cellular and Molecular Pathology, University of Liverpool, Liverpool L69 3GA, UK, GB |
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Abstract: | Voltage-gated Na+ channels are expressed by highly metastatic MAT-LyLu cells, but not by poorly metastatic AT-2 cells, derived from the rodent
Dunning model of prostatic cancer. We have investigated the possible involvement of these channels in the morphological development
of the cells. Incubation of both the MAT-LyLu and the AT-2 cell line for 24 h with the Na+ channel blocker tetrodotoxin (TTX) at 6 μM altered the morphology only of the MAT-LyLu cell line. TTX produced significant
decreases in: (a) cell process length and (b) field diameter, and increases in (c) cell body diameter and (d) process thickness.
Importantly, 6 μM TTX had no significant effects on proliferation rates or cellular toxicity. The results suggest that Na+ channel activity plays a significant role in determining the morphological development of MAT-LyLu cells in such a way as
to enhance their metastatic potential.
Received: 9 March 1998 / Accepted: 5 October 1998 |
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Keywords: | Voltage-gated Na+ channels Dunning cells Prostate cancer Morphology Tetrodotoxin Rat (Copenhagen) |
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