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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2017 ; 114 (16): 4159-64 Nephropedia Template TP
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Bidirectional KCNQ1:?-catenin interaction drives colorectal cancer cell differentiation #MMPMID28373572
Proc Natl Acad Sci U S A 2017[Apr]; 114 (16): 4159-64 PMID28373572show ga
The K+ channel KCNQ1 has been proposed as a tumor suppressor in colorectal cancer (CRC), but nothing is known about its regulatory role in early disease stages. KCNQ1 is a target gene of Wnt/?-catenin, which is tonically activated in CRC. We demonstrate a bidirectional interaction between KCNQ1 and ?-catenin as a key regulator of CRC cell differentiation, proliferation, and invasion. KCNQ1 stabilizes ?-catenin at adherent junctions to maintain an epithelial phenotype. The ?-catenin:T-cell factor (TCF)-4 transcriptional pathway directly represses KCNQ1 expression, and the loss of KCNQ1 was associated with an epithelial?mesenchymal transition. The KCNQ1:KCNE3 ion channel complex expression in primary tumors was correlated with good survival outcome for patients with CRC. KCNQ1 is a potential early prognostic biomarker for CRC.