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Article

Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo

  • Authors:
    • Peng Pan
    • Bai‑Xia Yang
    • Xiao‑Lin Ge
  • View Affiliations / Copyright

    Affiliations: Department of Radiotherapy, Huai'an First People's Hospital, Huai'an, Jiangsu 223300, P.R. China, Department of Radiotherapy, Nantong Tumor Hospital, Nantong, Jiangsu 226000, P.R. China, Department of Radiotherapy, Jiangsu Province Hospital, Nanjing, Jiangsu 210000, P.R. China
  • Pages: 3870-3875
    |
    Published online on: January 12, 2018
       https://doi.org/10.3892/ol.2018.7779
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Abstract

Brucea javanica oil emulsion (BJOE) has been used clinically to treat esophageal cancer combined with radiotherapy for numerous years in China. However, the detailed mechanism remains unclear. Thus, the effects of BJOE on the radiosensitivity of esophageal squamous cell carcinoma (ESCC) were evaluated in vitro and in vivo. The growth inhibitory effects of different BJOE concentrations were determined through an MTT assay. Radiosensitivity was evaluated through focal formation measurements and clone formation assays. The effects of BJOE on radiation‑induced apoptosis were examined through flow cytometric analysis. The effects of BJOE on hypoxia‑inducible factor 1α (HIF‑1α) protein levels in vitro and in vivo were respectively analyzed through western blot analyses and enzyme‑linked immunosorbent assays. BJOE significantly inhibited ECA109 cell proliferation in a dose‑ and time‑dependent manner. Pretreatment with 2.5 mg/ml BJOE increased ECA109 radiosensitivity. BJOE in combination with radiation increased the DNA double‑strand breaks. Compared with radiation alone, BJOE and radiation significantly increased the apoptotic rate of ECA109 cells. BJOE also decreased the HIF‑1α protein levels in vitro and in vivo. The results from the present study demonstrated that BJOE enhanced the radiosensitivity of human ESCC. This finding was associated with the inhibition of HIF‑1α expression. Therefore, BJOE may be a potential radiotherapy sensitization drug due to its significant anti‑hypoxic activity.
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Copy and paste a formatted citation
Spandidos Publications style
Pan P, Yang BX and Ge XL: Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo. Oncol Lett 15: 3870-3875, 2018.
APA
Pan, P., Yang, B., & Ge, X. (2018). Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo. Oncology Letters, 15, 3870-3875. https://doi.org/10.3892/ol.2018.7779
MLA
Pan, P., Yang, B., Ge, X."Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo". Oncology Letters 15.3 (2018): 3870-3875.
Chicago
Pan, P., Yang, B., Ge, X."Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo". Oncology Letters 15, no. 3 (2018): 3870-3875. https://doi.org/10.3892/ol.2018.7779
Copy and paste a formatted citation
x
Spandidos Publications style
Pan P, Yang BX and Ge XL: Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo. Oncol Lett 15: 3870-3875, 2018.
APA
Pan, P., Yang, B., & Ge, X. (2018). Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo. Oncology Letters, 15, 3870-3875. https://doi.org/10.3892/ol.2018.7779
MLA
Pan, P., Yang, B., Ge, X."Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo". Oncology Letters 15.3 (2018): 3870-3875.
Chicago
Pan, P., Yang, B., Ge, X."Brucea javanica seed oil enhances the radiosensitivity of esophageal cancer by inhibiting hypoxia-inducible factor 1α, in vitro and in vivo". Oncology Letters 15, no. 3 (2018): 3870-3875. https://doi.org/10.3892/ol.2018.7779
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