Open Access

Gadd45β silencing impaired viability and metastatic phenotypes in cholangiocarcinoma cells by modulating the EMT pathway

  • Authors:
    • Kyaw Zwar Myint
    • Pornparn Kongpracha
    • Panthip Rattanasinganchan
    • Kawin Leelawat
    • Penpak Moolthiya
    • Kittipong Chaiyabutr
    • Rutaiwan Tohtong
  • View Affiliations

  • Published online on: December 28, 2017     https://doi.org/10.3892/ol.2017.7706
  • Pages: 3031-3041
  • Copyright: © Myint et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Growth arrest and DNA damage-inducible-β (Gadd45β) is a stress-response protein involved in a number of processes, including cell cycle control, DNA repair, survival and death control, and stress signaling, depending on its interactions. Gadd45β expression is dysregulated in numerous types of cancer, functioning as either a tumor promoter or a tumor suppressor. However, the functions of Gadd45β in cholangiocarcinoma (CCA), particularly in metastasis, has not been studied. The immunohistochemical analysis of Gadd45β expression revealed that 75% of histological specimens from patients with CCA expressed high levels of Gadd45β, and that high Gadd45β expression was associated with metastasis. The role of Gadd45β in CCA was examined using siRNA‑mediated gene knockdown in HuCCA‑1, a human CCA cell line established from a Thai patient. The effects of Gadd45β downregulation upon cell viability and death, invasion, migration, matrix metalloproteinase (MMP) activity and epithelial‑mesenchymal transition (EMT) marker expression were investigated. Gadd45β knockdown impaired cell viability, which was associated with the induction of apoptosis. In addition, there was a marked reduction in invasion and migration, although MMP activity was unaffected. Impairment of these metastatic properties was accompanied by the decreased expression of EMT markers, including Slug, vimentin, claudin‑1 and zona occludens protein 1, whereas E‑cadherin expression was increased. The present study suggests that Gadd45β is involved in regulating the viability and the metastatic potential of CCA cells, which may be mediated by the modulation of the EMT pathway.
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March-2018
Volume 15 Issue 3

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Myint KZ, Kongpracha P, Rattanasinganchan P, Leelawat K, Moolthiya P, Chaiyabutr K and Tohtong R: Gadd45β silencing impaired viability and metastatic phenotypes in cholangiocarcinoma cells by modulating the EMT pathway. Oncol Lett 15: 3031-3041, 2018
APA
Myint, K.Z., Kongpracha, P., Rattanasinganchan, P., Leelawat, K., Moolthiya, P., Chaiyabutr, K., & Tohtong, R. (2018). Gadd45β silencing impaired viability and metastatic phenotypes in cholangiocarcinoma cells by modulating the EMT pathway. Oncology Letters, 15, 3031-3041. https://doi.org/10.3892/ol.2017.7706
MLA
Myint, K. Z., Kongpracha, P., Rattanasinganchan, P., Leelawat, K., Moolthiya, P., Chaiyabutr, K., Tohtong, R."Gadd45β silencing impaired viability and metastatic phenotypes in cholangiocarcinoma cells by modulating the EMT pathway". Oncology Letters 15.3 (2018): 3031-3041.
Chicago
Myint, K. Z., Kongpracha, P., Rattanasinganchan, P., Leelawat, K., Moolthiya, P., Chaiyabutr, K., Tohtong, R."Gadd45β silencing impaired viability and metastatic phenotypes in cholangiocarcinoma cells by modulating the EMT pathway". Oncology Letters 15, no. 3 (2018): 3031-3041. https://doi.org/10.3892/ol.2017.7706