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International Journal of Molecular Medicine
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2014-April Volume 33 Issue 4

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Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner

  • Authors:
    • Guen Tae Kim
    • Se Hee Lee
    • Jong Il Kim
    • Young Min Kim
  • View Affiliations / Copyright

    Affiliations: Department of Biological Sciences, College of Life Science and Nanotechnology, Hannam University, Yuseong-gu, Daejeon 305-811, Republic of Korea
    Copyright: © Kim et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 863-869
    |
    Published online on: February 13, 2014
       https://doi.org/10.3892/ijmm.2014.1658
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Abstract

The induction of apoptosis in cancer cells is a therapeutic strategy for the treatment of cancer. In the present study, we investigated the regulatory mechanisms responsible for quercetin-induced apoptosis, mamely the increased expression of sestrin 2 and the activation of the 5' AMP-activated protein kinase (AMPK)/p38 MAPK signaling pathway. Our results revealed that quercetin induced apoptosis by generating the production of intracellular reactive oxygen species (ROS) and increasing the expression of sestrin 2. The induction of apoptosis by quercetin occurred through the activation of the AMPK/p38 signaling pathway and was dependent on sestrin 2. However, the silencing of sestrin 2 using small interfering RNA (siRNA) targeting sestrin 2 revealed that quercetin did not regulate AMPK or p38 phosphorylation in the cells in which sestrin 2 was silenced. On the other hand, it has been previously reported that sestrin 2 expression is not dependent on p53 expression under hypoxic conditions, whereas DNA damage is dependent on p53. We demonstrate that the increase in the expression of sestrin 2 by quercetin-generated intracellular ROS is p53-independent. The increased expression of sestrin 2 induced apoptosis through the AMPK/p38 signaling pathway in the HT-29 colon cancer cells, which are p53 mutant, treated with quercetin. Thus, our data suggest that quercetin induces apoptosis by reducing mitochondrial membrane potential, generating intracellular ROS production and increasing sestrin 2 expression through the AMPK/p38 pathway. In addition, p53 is not a necessary element for an apoptotic event induced by sestrin 2.
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Copy and paste a formatted citation
Spandidos Publications style
Kim GT, Lee SH, Kim JI and Kim YM: Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner. Int J Mol Med 33: 863-869, 2014.
APA
Kim, G.T., Lee, S.H., Kim, J.I., & Kim, Y.M. (2014). Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner. International Journal of Molecular Medicine, 33, 863-869. https://doi.org/10.3892/ijmm.2014.1658
MLA
Kim, G. T., Lee, S. H., Kim, J. I., Kim, Y. M."Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner". International Journal of Molecular Medicine 33.4 (2014): 863-869.
Chicago
Kim, G. T., Lee, S. H., Kim, J. I., Kim, Y. M."Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner". International Journal of Molecular Medicine 33, no. 4 (2014): 863-869. https://doi.org/10.3892/ijmm.2014.1658
Copy and paste a formatted citation
x
Spandidos Publications style
Kim GT, Lee SH, Kim JI and Kim YM: Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner. Int J Mol Med 33: 863-869, 2014.
APA
Kim, G.T., Lee, S.H., Kim, J.I., & Kim, Y.M. (2014). Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner. International Journal of Molecular Medicine, 33, 863-869. https://doi.org/10.3892/ijmm.2014.1658
MLA
Kim, G. T., Lee, S. H., Kim, J. I., Kim, Y. M."Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner". International Journal of Molecular Medicine 33.4 (2014): 863-869.
Chicago
Kim, G. T., Lee, S. H., Kim, J. I., Kim, Y. M."Quercetin regulates the sestrin 2-AMPK-p38 MAPK signaling pathway and induces apoptosis by increasing the generation of intracellular ROS in a p53-independent manner". International Journal of Molecular Medicine 33, no. 4 (2014): 863-869. https://doi.org/10.3892/ijmm.2014.1658
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