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Published online 16 July 2001. doi:10.1083/jcb.200102028
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© The Rockefeller University Press, 0021-9525/2001/7/369 $5.00
The Journal of Cell Biology, Volume 154, Number 2, July 23, 2001 369-388


Article

Vitamin D3 promotes the differentiation of colon carcinoma cells by the induction of E-cadherin and the inhibition of ß-catenin signaling



Héctor G. Pálmer1, José Manuel González-Sancho1, Jesús Espada1, María T. Berciano2, Isabel Puig3, Josep Baulida3, Miguel Quintanilla1, Amparo Cano1, Antonio García de Herreros3, Miguel Lafarga2 and Alberto Muñoz1

1 Instituto de Investigaciones Biomédicas "Alberto Sols, " Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, E-28029 Madrid, Spain
2 Departamento de Anatomía y Biología Celular, Universidad de Cantabria, E-39011 Santander, Spain
3 Unitat de Biologia Celular i Molecular, Institut Municipal Investigació Mèdica, Universitat Pompeu Fabra, E-08003 Barcelona, Spain

Address correspondence to Alberto Muñoz, Instituto de Investigaciones Biomédicas "Alberto Sols," Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Arturo Duperier 4, E-28029 Madrid, Spain. Tel.: 34-91-5854640. Fax: 34-91-5854587. E-mail: amunoz{at}iib.uam.es

The ß-catenin signaling pathway is deregulated in nearly all colon cancers. Nonhypercalcemic vitamin D3 (1{alpha},25-dehydroxyvitamin D3) analogues are candidate drugs to treat this neoplasia. We show that these compounds promote the differentiation of human colon carcinoma SW480 cells expressing vitamin D receptors (VDRs) (SW480-ADH) but not that of a malignant subline (SW480-R) or metastasic derivative (SW620) cells lacking VDR. 1{alpha},25(OH)2D3 induced the expression of E-cadherin and other adhesion proteins (occludin, Zonula occludens [ZO]-1, ZO-2, vinculin) and promoted the translocation of ß-catenin, plakoglobin, and ZO-1 from the nucleus to the plasma membrane. Ligand-activated VDR competed with T cell transcription factor (TCF)-4 for ß-catenin binding. Accordingly, 1{alpha},25(OH)2D3 repressed ß-catenin–TCF-4 transcriptional activity. Moreover, VDR activity was enhanced by ectopic ß-catenin and reduced by TCF-4. Also, 1{alpha},25(OH)2D3 inhibited expression of ß-catenin–TCF-4-responsive genes, c-myc, peroxisome proliferator-activated receptor {delta}, Tcf-1, and CD44, whereas it induced expression of ZO-1. Our results show that 1{alpha},25(OH)2D3 induces E-cadherin and modulates ß-catenin–TCF-4 target genes in a manner opposite to that of ß-catenin, promoting the differentiation of colon carcinoma cells.

Key Words: vitamin D; vitamin D receptor; ß-catenin; E-cadherin; colon cancer


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