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Article Open Access

Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway

  • Authors:
    • Zhong‑Quan Zhao
    • Zhong‑Yang Yu
    • Jie Li
    • Xue‑Nong Ouyang
  • View Affiliations / Copyright

    Affiliations: Department of Oncology, Fuzhou General Hospital, Fuzhou, Fujian 350025, P.R. China
    Copyright: © Zhao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 63-68
    |
    Published online on: May 18, 2016
       https://doi.org/10.3892/ol.2016.4606
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Abstract

Gefitinib is a selective inhibitor of the tyrosine kinase epidermal growth factor receptor, which inhibits tumor pathogenesis, metastasis and angiogenesis, as well as promoting apoptosis. Therefore, gefitinib presents an effective drug for the targeted therapy of lung cancer. However, the underlying mechanisms by which gefitinib induces lung cancer cell death remain unclear. To investigate the effects of gefitinib on lung cancer cells and the mechanism of such, the present study analyzed the effect of gefitinib on the autophagy, apoptosis and proliferation of the A549 and A549‑gefitinib‑resistant (GR) cell lines GR. The regulation of the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT)/ mammalian target of rapamycin (mTOR) pathway was also investigated. Acridine orange staining revealed that gefitinib induced autophagy of A549 cells but not A549‑GR cells. In addition, gefitinib promoted apoptosis and inhibited proliferation of A549 cells but not A549‑GR cells. Furthermore, western blot analysis demonstrated that gefitinib treatment led to the downregulation of PI3K, AKT, pAKT, mTOR and phosphorylated‑mTOR protein expression in A549 cells but not A549‑GR cells. LY294002 blocked the PI3K/AKT/mTOR pathway and induced autophagy and apoptosis of A549 cells, however, no synergistic effect was observed following combined treatment with gefitinib and LY294002. In conclusion, the results of the present study indicate that gefitinib promotes autophagy and apoptosis of lung cancer cells via blockade of the PI3K/AKT/mTOR pathway, which leads to lung cancer cell death.
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Copy and paste a formatted citation
Spandidos Publications style
Zhao ZQ, Yu ZY, Li J and Ouyang XN: Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway. Oncol Lett 12: 63-68, 2016.
APA
Zhao, Z., Yu, Z., Li, J., & Ouyang, X. (2016). Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway. Oncology Letters, 12, 63-68. https://doi.org/10.3892/ol.2016.4606
MLA
Zhao, Z., Yu, Z., Li, J., Ouyang, X."Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway". Oncology Letters 12.1 (2016): 63-68.
Chicago
Zhao, Z., Yu, Z., Li, J., Ouyang, X."Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway". Oncology Letters 12, no. 1 (2016): 63-68. https://doi.org/10.3892/ol.2016.4606
Copy and paste a formatted citation
x
Spandidos Publications style
Zhao ZQ, Yu ZY, Li J and Ouyang XN: Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway. Oncol Lett 12: 63-68, 2016.
APA
Zhao, Z., Yu, Z., Li, J., & Ouyang, X. (2016). Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway. Oncology Letters, 12, 63-68. https://doi.org/10.3892/ol.2016.4606
MLA
Zhao, Z., Yu, Z., Li, J., Ouyang, X."Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway". Oncology Letters 12.1 (2016): 63-68.
Chicago
Zhao, Z., Yu, Z., Li, J., Ouyang, X."Gefitinib induces lung cancer cell autophagy and apoptosis via blockade of the PI3K/AKT/mTOR pathway". Oncology Letters 12, no. 1 (2016): 63-68. https://doi.org/10.3892/ol.2016.4606
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