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. 2011 Oct 3;6(10):e25941. doi: 10.1371/journal.pone.0025941

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Li et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Tumor cells from parental, vector control and STAT3-silenced SW1990 cells were grown in a monolayer or in nude mice. The monolayer cells and tumor xenografts were then subjected to immunocytochemistry and immunohistochemistry staining of MMP-7 protein. A, parental cells; B, STAT3-silenced cells; C, parental tumors; D, STAT3-silecnced tumors. X 400 magnification. Red arrow, tumor cells.