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Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression

  • Authors:
    • Peijie He
    • Shen Bo
    • Phil‑Sang Chung
    • Jin‑Chul Ahn
    • Liang Zhou
  • View Affiliations / Copyright

    Affiliations: Department of Otolaryngology‑Head and Neck Surgery, Shanghai Key Clinical Disciplines of Otorhinolaryngology, Eye and ENT Hospital of Fudan University, Shanghai 200031, P.R. China, Institute of Radiation Medicine, Fudan University, Shanghai 200032, P.R. China, Department of Otolaryngology‑Head and Neck Surgery, Medical Laser Research Center, College of Medicine, Dankook University, Cheonan 330‑715, Republic of Korea
    Copyright: © He et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1889-1895
    |
    Published online on: July 20, 2016
       https://doi.org/10.3892/ol.2016.4889
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Abstract

The present study aimed to investigate the effect, and elucidate the potential mechanisms, of 9-hydroxypheophorbide α‑based photodynamic therapy (9‑HPbD‑PDT) on apoptosis and necrosis induction, and migration suppression of laryngeal cancer AMC‑HN‑3 (HN‑3) cells. Phototoxicity initiated by 9‑HPbD‑PDT on HN‑3 cells was observed in a photosensitizer dose-dependent pattern. There was an initial increase of apoptotic cells coupled with gradual enhancement of reactive oxygen series (ROS) generation at lower doses of 9‑HPbD. By contrast, at a higher dose of 9-HPbD, there was a clear increase of necrotic cells with a gradual decrease of ROS generation. Following PDT, an elevated percentage of apoptotic cells with shrinkage or condensing nuclei was observed using Hoechst 33342/propidium iodide double staining, and an upregulated expression of poly ADP‑ribose polymerase was detected through western blotting. A disruption of the mitochondrial membrane potential was detected 2 h following PDT. Significant suppression of cell migration and downregulation of epidermal growth factor receptor (EGFR) expression were recorded following PDT. These results indicate that the distribution of photosensitizer leads to differences in the generation of ROS, which subsequently determines the type of cell death. Overall, mitochondrial activation under oxidative stress is important in the 9-HPbD-PDT-induced apoptosis of HN‑3 cells. Migration suppression of HN‑3 cells following PDT may be associated with the inhibited expression of EGFR, due to oxidative stress.
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Copy and paste a formatted citation
Spandidos Publications style
He P, Bo S, Chung PS, Ahn JC and Zhou L: Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression. Oncol Lett 12: 1889-1895, 2016.
APA
He, P., Bo, S., Chung, P., Ahn, J., & Zhou, L. (2016). Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression. Oncology Letters, 12, 1889-1895. https://doi.org/10.3892/ol.2016.4889
MLA
He, P., Bo, S., Chung, P., Ahn, J., Zhou, L."Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression". Oncology Letters 12.3 (2016): 1889-1895.
Chicago
He, P., Bo, S., Chung, P., Ahn, J., Zhou, L."Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression". Oncology Letters 12, no. 3 (2016): 1889-1895. https://doi.org/10.3892/ol.2016.4889
Copy and paste a formatted citation
x
Spandidos Publications style
He P, Bo S, Chung PS, Ahn JC and Zhou L: Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression. Oncol Lett 12: 1889-1895, 2016.
APA
He, P., Bo, S., Chung, P., Ahn, J., & Zhou, L. (2016). Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression. Oncology Letters, 12, 1889-1895. https://doi.org/10.3892/ol.2016.4889
MLA
He, P., Bo, S., Chung, P., Ahn, J., Zhou, L."Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression". Oncology Letters 12.3 (2016): 1889-1895.
Chicago
He, P., Bo, S., Chung, P., Ahn, J., Zhou, L."Photosensitizer effect of 9-hydroxypheophorbide α on diode laser-irradiated laryngeal cancer cells: Oxidative stress-directed cell death and migration suppression". Oncology Letters 12, no. 3 (2016): 1889-1895. https://doi.org/10.3892/ol.2016.4889
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