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Article Open Access

SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells

  • Authors:
    • Ji‑Hoon Park
    • Kyung‑Soon Park
  • View Affiliations / Copyright

    Affiliations: Department of Biomedical Science, College of Life Science, CHA University, Seongnam‑si, Gyeonggi‑do 463‑400, Republic of Korea
    Copyright: © Park et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2749-2754
    |
    Published online on: February 6, 2020
       https://doi.org/10.3892/ol.2020.11375
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Abstract

Transforming growth factor‑β (TGFβ) is a secreted cytokine whose aberrant spatiotemporal expression is related to cancer progression and metastasis. While TGFβ acts as a tumor suppressor in normal and premalignant stages, TGFβ functions as a tumor promoter during the malignant phases of tumor progression by prompting cancer cells to undergo epithelial‑mesenchymal transition (EMT), which enhances tumor cell invasion and ultimately promotes metastasis to other organs. Extensive studies have been performed to uncover the molecular and cellular mechanisms underlying TGFβ inducing EMT in cancer cells. Here, we suggested that ELK3, which encodes a protein that orchestrates invasion and metastasis of triple negative breast cancer cells, is a downstream target of TGFβ‑SMAD3 in MDA‑MB231 cells. ELK3 expression was increased in a time‑dependent manner upon TGFβ treatment. Chemical and molecular inhibition of the TGFβ receptor blocked the ability of TGFβ to induce ELK3 expression. Small interfering RNA‑mediated suppression analysis revealed that SMAD3 induces TGFβ signaling to express ELK3. Moreover, the results of the luciferase reporter assay and chromatin immunoprecipitation analysis showed that SMAD3 directly binds to the SMAD‑binding element on the promoter of ELK3 to activate gene expression following TGFβ stimulation. We concluded that ELK3 is a novel downstream target of TGFβ‑SMAD3 signaling in aggressive breast cancer cells.
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Copy and paste a formatted citation
Spandidos Publications style
Park JH and Park KS: SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells. Oncol Lett 19: 2749-2754, 2020.
APA
Park, J., & Park, K. (2020). SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells. Oncology Letters, 19, 2749-2754. https://doi.org/10.3892/ol.2020.11375
MLA
Park, J., Park, K."SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells". Oncology Letters 19.4 (2020): 2749-2754.
Chicago
Park, J., Park, K."SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells". Oncology Letters 19, no. 4 (2020): 2749-2754. https://doi.org/10.3892/ol.2020.11375
Copy and paste a formatted citation
x
Spandidos Publications style
Park JH and Park KS: SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells. Oncol Lett 19: 2749-2754, 2020.
APA
Park, J., & Park, K. (2020). SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells. Oncology Letters, 19, 2749-2754. https://doi.org/10.3892/ol.2020.11375
MLA
Park, J., Park, K."SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells". Oncology Letters 19.4 (2020): 2749-2754.
Chicago
Park, J., Park, K."SMAD3 promotes ELK3 expression following transforming growth factor β‑mediated stimulation of MDA‑MB231 cells". Oncology Letters 19, no. 4 (2020): 2749-2754. https://doi.org/10.3892/ol.2020.11375
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