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Article Open Access

Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo

  • Authors:
    • Chuandong Zhu
    • Lixue Wang
    • Yang Cai
    • Guoxiang Wang
    • Hanfeng Xu
    • Yuan Wan
    • Qin Zheng
  • View Affiliations / Copyright

    Affiliations: Department of Oncology, The Second Hospital of Nanjing Affiliated to Medical School of Southeast University, Nanjing, Jiangsu 210003, P.R. China, Department of Oncological Radiotherapy, The Second Hospital of Nanjing Affiliated to Medical School of Southeast University, Nanjing, Jiangsu 210003, P.R. China, Department of Oncology, Xishan People's Hospital, Wuxi, Jiangsu 214011, P.R. China, Nanjing Zetect Bioscience Incorporated, Nanjing, Jiangsu 210061, P.R. China, Department of Biomedical Engineering, Pennsylvania State University, State College, PA 16801, USA
    Copyright: © Zhu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 4221-4228
    |
    Published online on: January 25, 2018
       https://doi.org/10.3892/ol.2018.7864
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Abstract

The high atomic number of gold nanoparticles (GNPs) enables them to offer potential as practical and efficient radiosensitizing agents for cancer radiotherapy applications. In the present study, it was demonstrated that GNPs can significantly modulate the irradiation response of hepatocellular carcinoma (HCC) cells in vitro and in vivo, of which the underlying mechanisms were investigated. Cetuximab (C225) is a targeting agent, which binds to the extracellular domain of epidermal growth factor receptor (EGFR). Hepatocyte‑targeting, EGFR‑specific C225 was synthesized onto GNP surfaces (C225‑GNPs) to increase the GNP targeting specificity. C225‑GNPs was synthesized successfully and characterized. The cytotoxicity was tested using a Cell Counting Kit‑8 assay and 50% inhibition concentration of SMCC7721 cells was calculated. Cell uptake assay was detected using transmission electron microscopy. Radiosensitization was tested using a cell colony formation assay and cell cycle was detected using flow cytometry. The expression of a number of apoptotic proteins were tested by western blot analysis. Orthotropic SMCC7721 xenografts were used in order to verify its radiosensitizing effect. The results revealed that a higher number of C225‑GNPs were effectively uptaken by SMCC7721 cells and markedly enhanced cancer cell death. The sensitization mechanism of C225‑GNPs was associated with the apoptotic gene signalling process activated by endoplasmic reticulum stress and the unfolded protein response in cancer cells. In orthotopic SMCC7721 xenografts, the C225‑GNPs significantly enhanced the radiation‑induced suppression of tumour growth. The results of the present study provided evidence that C225‑GNPs are potent radiosensitizers with radiotherapeutic value for HCC with the overexpression of EGFR.
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Copy and paste a formatted citation
Spandidos Publications style
Zhu C, Wang L, Cai Y, Wang G, Xu H, Wan Y and Zheng Q: Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo. Oncol Lett 15: 4221-4228, 2018.
APA
Zhu, C., Wang, L., Cai, Y., Wang, G., Xu, H., Wan, Y., & Zheng, Q. (2018). Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo. Oncology Letters, 15, 4221-4228. https://doi.org/10.3892/ol.2018.7864
MLA
Zhu, C., Wang, L., Cai, Y., Wang, G., Xu, H., Wan, Y., Zheng, Q."Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo". Oncology Letters 15.4 (2018): 4221-4228.
Chicago
Zhu, C., Wang, L., Cai, Y., Wang, G., Xu, H., Wan, Y., Zheng, Q."Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo". Oncology Letters 15, no. 4 (2018): 4221-4228. https://doi.org/10.3892/ol.2018.7864
Copy and paste a formatted citation
x
Spandidos Publications style
Zhu C, Wang L, Cai Y, Wang G, Xu H, Wan Y and Zheng Q: Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo. Oncol Lett 15: 4221-4228, 2018.
APA
Zhu, C., Wang, L., Cai, Y., Wang, G., Xu, H., Wan, Y., & Zheng, Q. (2018). Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo. Oncology Letters, 15, 4221-4228. https://doi.org/10.3892/ol.2018.7864
MLA
Zhu, C., Wang, L., Cai, Y., Wang, G., Xu, H., Wan, Y., Zheng, Q."Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo". Oncology Letters 15.4 (2018): 4221-4228.
Chicago
Zhu, C., Wang, L., Cai, Y., Wang, G., Xu, H., Wan, Y., Zheng, Q."Enhanced radiation effect on SMCC7721 cells through endoplasmic reticulum stress induced by C225-GNPs in vitro and in vivo". Oncology Letters 15, no. 4 (2018): 4221-4228. https://doi.org/10.3892/ol.2018.7864
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