Open Access
Dickkopf-1 enhances migration of HEK293 cell by beta-catenin/E-cadherin degradation
Hai-Bin Kuang1,Cheng-Lin Miao1,Wei-Xiang Guo1,Sha Peng1,Yu-Jing Cao1,En-Kui Duan1
State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P.R. China
DOI: 10.2741/3373 Volume 14 Issue 6, pp.2212-2220
Published: 01 January 2009

Migration is an important process during cellular activity and embryo development. We recently showed that Dickkopf-1(Dkk-1), an antagonist of Wnt/ beta-catenin signaling pathway, could promote trophoblast cell invasion during murine placentation. However, mechanism of Dkk-1 action on cell migration was not clear. The objective of this study was to further evaluate the effect of Dkk-1 on cell migration and to identify the underlining mechanisms. Functional assays with stable Dkk-1 transfected HEK293 cells revealed that Dkk-1 expression increased cell migration by decreasing cell-cell adhesion, not cell-matrix adhesion. Treatment with LiCl and Genistein (widely used inhibitor of glycogen synthase kinase-3 and tyrosine protein kinase, respectively.) could inhibit the migration effect of Dkk-1, and significantly increased the membrane localization of beta-catenin and E-cadherin in HEK293 cells transfected with Dkk-1. Further data showed that HEK293 cells transfected with Dkk-1 have significantly decreased accumulation of both beta-catenin and E-cadherin at the cell membrane. Together, our data suggest that Dkk-1 stimulates the release of beta-catenin from cell membrane and facilitates cell migration which accompanies degradation of beta-catenin/E-cadherin.

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Hai-Bin Kuang, Cheng-Lin Miao, Wei-Xiang Guo, Sha Peng, Yu-Jing Cao, En-Kui Duan. Dickkopf-1 enhances migration of HEK293 cell by beta-catenin/E-cadherin degradation. Frontiers in Bioscience-Landmark. 2009. 14(6); 2212-2220.