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Cancers 2014, 6(3), 1394-1407; doi:10.3390/cancers6031394

STAT3: An Anti-Invasive Factor in Colorectal Cancer?

1
Department of Medicine, University of California, San Diego, 9500 Gilman Dr. MC 0663, La Jolla, CA 92093, USA
2
Department of Otorhinolaryngology, Dankook University College of Medicine, 16-5 Anseo-dong, Cheonan, Chungcheongnam-do 330-715, Korea
*
Author to whom correspondence should be addressed.
Received: 5 March 2014 / Revised: 13 June 2014 / Accepted: 20 June 2014 / Published: 3 July 2014
(This article belongs to the Special Issue STAT3 Signalling in Cancer: Friend or Foe)
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Abstract

Signal Transducer and Activator of Transcription 3 (STAT3) is activated in a majority of cancers, and promotes tumorigenesis and even metastasis through transcriptional activation of its target genes. Recently, we discovered that STAT3 suppresses epithelial-to-mesenchymal transition (EMT) and thus metastasis in a mouse model of colorectal cancer (CRC), while it did not affect the overall tumor burden. Furthermore, we found that STAT3 in intestinal epithelial cells (IEC) suppresses EMT by regulating stability of an EMT inducer, SNAI-1 (Snail-1). Here, STAT3 functions as an adaptor rather than a transcription factor in the post-translational modification of SNAI-1. In this review, we discuss the unexpected and contradictory role of STAT3 in metastasis of CRC and its clinical implications.
Keywords: signal transducer and activator of transcription 3 (STAT3); colorectal cancer (CRC); metastasis; epithelial to mesenchymal transition (EMT); Snail-1 (SNAI-1); glycogen synthase kinase 3β (GSK3β); Snail; adenomatous polyposis coli (APC); tight junction (TJ); matrix metalloproteinases (MMPs) signal transducer and activator of transcription 3 (STAT3); colorectal cancer (CRC); metastasis; epithelial to mesenchymal transition (EMT); Snail-1 (SNAI-1); glycogen synthase kinase 3β (GSK3β); Snail; adenomatous polyposis coli (APC); tight junction (TJ); matrix metalloproteinases (MMPs)
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

de Jong, P.R.; Mo, J.-H.; Harris, A.R.; Lee, J.; Raz, E. STAT3: An Anti-Invasive Factor in Colorectal Cancer? Cancers 2014, 6, 1394-1407.

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