E-cadherin knockdown increases β-catenin reducing colorectal cancer chemosensitivity only in three-dimensional cultures

  • Authors:
    • Xi Liang
    • Xueqing Xu
    • Fengchao Wang
    • Xuedan Chen
    • Ni Li
    • Cancan Wang
    • Jianming He
  • View Affiliations

  • Published online on: August 27, 2015     https://doi.org/10.3892/ijo.2015.3137
  • Pages: 1517-1527
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Abstract

Decreased expression of E-cadherin correlates with poor prognosis in colorectal cancer. Certain E-cadherin signaling cascades are triggered by intercellular force or binding to cadherins on adjacent cells. Three-dimensional (3D) cell cultures represent a better approximation of cell-cell adhesion in vivo than two-dimensional (2D) cultures. Here, we explored the role of E-cadherin in colorectal cancer chemosensitivity in 3D cultures. Cell-cell junctions, including tight junctions, gap junctions, intermediate junctions and desmosomes, were commonly found in 3D cultures. Knockdown of E-cadherin by lentiviral delivery of shRNA significantly reduced chemosensitivity to 5-fluorouracil and irinotecan, increased β-catenin protein level in HCT116 3D cultures. However, these effects were not observed in 2D cultures. Knockdown of β-catenin significantly increased chemosensitivity to 5-fluorouracil and irinotecan in HCT116 3D cultures and LoVo 3D cultures. 5-Fluorouracil activated p38, ERK1/2 and JNK1/2 in a time-dependent manner in HCT116 3D cultures. E-cadherin knockdown enhanced p-p38 and p-ERK1/2, except p-JNK1/2 in HCT116 3D cultures. Knockdown of β-catenin attenuated p-p38 and p-ERK1/2 in HCT116 3D cultures and LoVo 3D cultures. Inhibition of p-p38 or p-ERK1/2 in HCT116 3D cultures significantly increased chemosensitivity. Our results indicate E-cadherin knockdown increases β-catenin resulting in reduction of chemosensitivity only in 3D cultures, and β-catenin increasing the p-p38/p-ERK1/2 is involved in this mechanism.
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October-2015
Volume 47 Issue 4

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Liang X, Xu X, Wang F, Chen X, Li N, Wang C and He J: E-cadherin knockdown increases β-catenin reducing colorectal cancer chemosensitivity only in three-dimensional cultures. Int J Oncol 47: 1517-1527, 2015
APA
Liang, X., Xu, X., Wang, F., Chen, X., Li, N., Wang, C., & He, J. (2015). E-cadherin knockdown increases β-catenin reducing colorectal cancer chemosensitivity only in three-dimensional cultures. International Journal of Oncology, 47, 1517-1527. https://doi.org/10.3892/ijo.2015.3137
MLA
Liang, X., Xu, X., Wang, F., Chen, X., Li, N., Wang, C., He, J."E-cadherin knockdown increases β-catenin reducing colorectal cancer chemosensitivity only in three-dimensional cultures". International Journal of Oncology 47.4 (2015): 1517-1527.
Chicago
Liang, X., Xu, X., Wang, F., Chen, X., Li, N., Wang, C., He, J."E-cadherin knockdown increases β-catenin reducing colorectal cancer chemosensitivity only in three-dimensional cultures". International Journal of Oncology 47, no. 4 (2015): 1517-1527. https://doi.org/10.3892/ijo.2015.3137