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Published in: Molecular Cancer 1/2010

Open Access 01-12-2010 | Research

Tetrathiomolybdate inhibits head and neck cancer metastasis by decreasing tumor cell motility, invasiveness and by promoting tumor cell anoikis

Authors: Pawan Kumar, Arti Yadav, Samip N Patel, Mozaffarul Islam, Quintin Pan, Sofia D Merajver, Theodoros N Teknos

Published in: Molecular Cancer | Issue 1/2010

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Abstract

Background

The metastatic spread of solid tumors is directly or indirectly responsible for most cancer-related deaths. Tumor metastasis is very complex and this process requires a tumor cell to acquire enhanced motility, invasiveness and anoikis resistance to successfully establish a tumor at a distal site. Metastatic potential of tumor cells is directly correlated with the expression levels of several angiogenic cytokines. Copper is a mandatory cofactor for the function of many of these angiogenic mediators as well as other proteins that play an important role in tumor cell motility and invasiveness. We have previously shown that tetrathiomolybdate (TM) is a potent chelator of copper and it mediates its anti-tumor effects by suppressing tumor angiogenesis. However, very little is known about the effect of TM on tumor cell function and tumor metastasis. In this study, we explored the mechanisms underlying TM-mediated inhibition of tumor metastasis.

Results

We used two in vivo models to examine the effects of TM on tumor metastasis. Animals treated with TM showed a significant decrease in lung metastasis in both in vivo models as compared to the control group. In addition, tumor cells from the lungs of TM treated animals developed significantly smaller colonies and these colonies had significantly fewer tumor cells. TM treatment significantly decreased tumor cell motility and invasiveness by inhibiting lysyl oxidase (LOX) activity, FAK activation and MMP2 levels. Furthermore, TM treatment significantly enhanced tumor cell anoikis by activating p38 MAPK cell death pathway and by downregulating XIAP survival protein expression.

Conclusions

Taken together, these results suggest that TM is a potent suppressor of head and neck tumor metastasis by modulating key regulators of tumor cell motility, invasiveness and anoikis resistance.
Appendix
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Metadata
Title
Tetrathiomolybdate inhibits head and neck cancer metastasis by decreasing tumor cell motility, invasiveness and by promoting tumor cell anoikis
Authors
Pawan Kumar
Arti Yadav
Samip N Patel
Mozaffarul Islam
Quintin Pan
Sofia D Merajver
Theodoros N Teknos
Publication date
01-12-2010
Publisher
BioMed Central
Published in
Molecular Cancer / Issue 1/2010
Electronic ISSN: 1476-4598
DOI
https://doi.org/10.1186/1476-4598-9-206

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