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Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin

  • Authors:
    • Jingjing Wu
    • Qin Tang
    • Shunyu Zhao
    • Fang Zheng
    • Yan Wu
    • Ge Tang
    • Swei Sunny Hahn
  • View Affiliations / Copyright

    Affiliations: Laboratory of Tumor Molecular Biology and Targeted Therapies of Chinese Medicine, University of Guangzhou Traditional Chinese Medicine, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510120, P.R. China
    Copyright: © Wu et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 95-103
    |
    Published online on: May 6, 2014
       https://doi.org/10.3892/ijo.2014.2420
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Abstract

Curcumin, one of the main bioactive components extracted from a traditional Chinese medicinal herb, exhibits potent anticancer activity against many types of cancer cells including nasopharyngeal carcinoma (NPC). However, the detailed molecular mechanism underlying this is not clearly understood. In this study, we showed that curcumin significantly inhibited the growth of NPC cells in a dose- and time-dependent manner as determined by MTT assays, while increasing apoptosis was also observed as measured by flow cytometry for the FITC-Annexin V and propidium iodide (PI) label and Hoechst 33258 staining. To further explore the potential mechanism, we showed that curcumin increased the phosphorylation of ERK1/2 but not p38 MAPK in a time-dependent manner, and induced protein expression of the tumor suppressors FOXO3a and p53 in a dose‑dependent manner, which were not observed in the presence of PD98059, an inhibitor of ERK1/2. Furthermore, silencing of FOXO3a and p53 genes by siRNAs overcame the inhibitory effect of curcumin on cell proliferation. Silencing or blockade of p53 using siRNA or chemical inhibitor abrogated the effect of curcumin on expression of FOXO3a protein; silencing or overexpression of FOXO3a had no further effect on curcumin-induced p53 protein expression. Furthermore, blockade of ERK1/2 and exogenous expression of FOXO3a restored the effect of curcumin on growth of cells. Together, our studies show that curcumin inhibits growth and induces apoptosis of NPC cells through ERK1/2-mediated increase in the protein expression and interaction of p53 and FOXO3a. p53 is upstream of FOXO3a, which form a regulatory loop that mediates the effect of curcumin. This study unveils a new mechanism by which curcumin inhibits the proliferation and induces apoptosis of human NPC cells.
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Copy and paste a formatted citation
Spandidos Publications style
Wu J, Tang Q, Zhao S, Zheng F, Wu Y, Tang G and Hahn SS: Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin. Int J Oncol 45: 95-103, 2014.
APA
Wu, J., Tang, Q., Zhao, S., Zheng, F., Wu, Y., Tang, G., & Hahn, S.S. (2014). Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin. International Journal of Oncology, 45, 95-103. https://doi.org/10.3892/ijo.2014.2420
MLA
Wu, J., Tang, Q., Zhao, S., Zheng, F., Wu, Y., Tang, G., Hahn, S. S."Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin". International Journal of Oncology 45.1 (2014): 95-103.
Chicago
Wu, J., Tang, Q., Zhao, S., Zheng, F., Wu, Y., Tang, G., Hahn, S. S."Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin". International Journal of Oncology 45, no. 1 (2014): 95-103. https://doi.org/10.3892/ijo.2014.2420
Copy and paste a formatted citation
x
Spandidos Publications style
Wu J, Tang Q, Zhao S, Zheng F, Wu Y, Tang G and Hahn SS: Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin. Int J Oncol 45: 95-103, 2014.
APA
Wu, J., Tang, Q., Zhao, S., Zheng, F., Wu, Y., Tang, G., & Hahn, S.S. (2014). Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin. International Journal of Oncology, 45, 95-103. https://doi.org/10.3892/ijo.2014.2420
MLA
Wu, J., Tang, Q., Zhao, S., Zheng, F., Wu, Y., Tang, G., Hahn, S. S."Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin". International Journal of Oncology 45.1 (2014): 95-103.
Chicago
Wu, J., Tang, Q., Zhao, S., Zheng, F., Wu, Y., Tang, G., Hahn, S. S."Extracellular signal-regulated kinase signaling-mediated induction and interaction of FOXO3a and p53 contribute to the inhibition of nasopharyngeal carcinoma cell growth by curcumin". International Journal of Oncology 45, no. 1 (2014): 95-103. https://doi.org/10.3892/ijo.2014.2420
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