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2014-March Volume 9 Issue 3

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Article

α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling

  • Authors:
    • Ren-Jie Zhuo
    • Feng Wang
    • Xiao-Hong Zhang
    • Jin‑Jie Zhang
    • Jin Xu
    • Wei Dong
    • Zu-Quan Zou
  • View Affiliations / Copyright

    Affiliations: Medical School, Ningbo University, Ningbo, Zhejiang 315211, P.R. China, Clinical Laboratory, Lihuili Hospital, Ningbo, P.R. China, Maritime Faculty, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
  • Pages: 993-998
    |
    Published online on: January 13, 2014
       https://doi.org/10.3892/mmr.2014.1892
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Abstract

α-eleostearic acid (α-ESA) has been shown to possess antitumor activity in cancer cells. However, the underlying mechanism(s) remain largely unknown. The present study was designed to investigate the antitumor effect of α-ESA in breast cancer cells showing different expression levels of the human epidermal growth factor receptor 2 (HER2). α-ESA inhibited cell growth and induced apoptosis in the SKBR3 and T47D breast cancer cell lines. The mechanism by which cell growth was inhibited involved G0/G1 and G2/M cell cycle phase arrest. The MTT assay showed that SKBR3 cells are more sensitive to α-ESA compared to T47D cells. Western blot analysis revealed that α-ESA treatment not only reduced HER2/HER3 protein expression, but also increased the level of phosphorylated phosphatase and tensin homolog protein (PTEN), which led to decreased levels of phosphorylated Akt. Inactive Akt further reduced phosphorylation of glycogen synthase kinase-3β (GSK-3β) and B-cell lymphoma 2 (Bcl-2)‑associated death promoter (BAD) proteins. Furthermore, the level of the anti-apoptotic protein Bcl-2 was found to be reduced following α-ESA treatment. Notably, nuclear factor κB (NF-κB) was activated by α-ESA treatment. Data of the present study showed that the antitumor activity of α-ESA is at least partly mediated by reduction of the HER2/HER3 heterodimer protein level, activation of the Akt/BAD/Bcl-2 apoptotic pathway and inhibition of the Akt/GSK-3β survival pathway in the two breast cancer cell lines investigated in this study. Therefore, α-ESA may be considered a beneficial dietary factor for the prevention and treatment of invasive breast cancer in cells overexpressing HER2.
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Copy and paste a formatted citation
Spandidos Publications style
Zhuo R, Wang F, Zhang X, Zhang JJ, Xu J, Dong W and Zou Z: α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling. Mol Med Rep 9: 993-998, 2014.
APA
Zhuo, R., Wang, F., Zhang, X., Zhang, J., Xu, J., Dong, W., & Zou, Z. (2014). α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling. Molecular Medicine Reports, 9, 993-998. https://doi.org/10.3892/mmr.2014.1892
MLA
Zhuo, R., Wang, F., Zhang, X., Zhang, J., Xu, J., Dong, W., Zou, Z."α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling". Molecular Medicine Reports 9.3 (2014): 993-998.
Chicago
Zhuo, R., Wang, F., Zhang, X., Zhang, J., Xu, J., Dong, W., Zou, Z."α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling". Molecular Medicine Reports 9, no. 3 (2014): 993-998. https://doi.org/10.3892/mmr.2014.1892
Copy and paste a formatted citation
x
Spandidos Publications style
Zhuo R, Wang F, Zhang X, Zhang JJ, Xu J, Dong W and Zou Z: α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling. Mol Med Rep 9: 993-998, 2014.
APA
Zhuo, R., Wang, F., Zhang, X., Zhang, J., Xu, J., Dong, W., & Zou, Z. (2014). α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling. Molecular Medicine Reports, 9, 993-998. https://doi.org/10.3892/mmr.2014.1892
MLA
Zhuo, R., Wang, F., Zhang, X., Zhang, J., Xu, J., Dong, W., Zou, Z."α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling". Molecular Medicine Reports 9.3 (2014): 993-998.
Chicago
Zhuo, R., Wang, F., Zhang, X., Zhang, J., Xu, J., Dong, W., Zou, Z."α-eleostearic acid inhibits growth and induces apoptosis in breast cancer cells via HER2/HER3 signaling". Molecular Medicine Reports 9, no. 3 (2014): 993-998. https://doi.org/10.3892/mmr.2014.1892
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