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Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells

  • Authors:
    • Zhiyuan Zhuo
    • Zhenyu Song
    • Zhe Ma
    • Yuanfang Zhang
    • Guoxiong Xu
    • Gang Chen
  • View Affiliations / Copyright

    Affiliations: Department of Urology, Jinshan Hospital, Fudan University, Shanghai 201508, P.R. China, Department of Urology, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China, Center Laboratory, Jinshan Hospital, Fudan University, Shanghai 201508, P.R. China
    Copyright: © Zhuo et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2181-2193
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    Published online on: February 14, 2019
       https://doi.org/10.3892/or.2019.7013
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Abstract

Patients with non‑muscle invasive bladder cancer (NMIBC) frequently relapse following surgery due to incomplete resection and chemoresistance, highlighting the importance of developing novel therapeutic strategies that mechanistically assist in eradicating the residual tumor. The aim of the present study was to evaluate the anticancer effect of chlorophyllin e6‑mediated photodynamic therapy (e6‑PDT) and its potential mechanisms by using monolayer cells or multicellular tumor spheroid models of human bladder cancer cells (T24 and 5637). The results revealed that e6‑PDT exhibited significant cytotoxicity in the T24 and 5637 cells of these two models as detected by the Water‑Soluble Tetrazolium Salts‑1 and CellTiter‑Glo Luminescent Cell Viability assays, respectively. Cell migration and invasion capacities decreased markedly following e6‑PDT. In addition, the cells following e6‑PDT exhibited typical morphological changes of apoptosis as detected by fluorescence microscopy with 4',6‑diamidino‑2‑phenylindole staining and transmission electron microscopy. A greater number of apoptotic cells were observed post‑e6‑PDT by flow cytometry. The expression levels of poly(adenosine diphosphate‑ribose) polymerase (PARP) and B‑cell lymphoma 2 protein were decreased, while cleaved PARP was increased, significantly following e6‑PDT as determined by western blotting. The level of intracellular reactive oxygen species (ROS) was increased, while the activity of superoxide dismutase (SOD) was decreased, significantly in e6‑PDT‑treated cells. Thus, the novel e6‑PDT exhibits prominent photo‑cytotoxicity effect and the induction of apoptosis was probably due to the inhibition of SOD activity and the generation of ROS. These results indicate that chlorophyllin e6 is an effective photosensitizer and that e6‑PDT may have a therapeutic application for the treatment of bladder cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Zhuo Z, Song Z, Ma Z, Zhang Y, Xu G and Chen G: Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells. Oncol Rep 41: 2181-2193, 2019.
APA
Zhuo, Z., Song, Z., Ma, Z., Zhang, Y., Xu, G., & Chen, G. (2019). Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells. Oncology Reports, 41, 2181-2193. https://doi.org/10.3892/or.2019.7013
MLA
Zhuo, Z., Song, Z., Ma, Z., Zhang, Y., Xu, G., Chen, G."Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells". Oncology Reports 41.4 (2019): 2181-2193.
Chicago
Zhuo, Z., Song, Z., Ma, Z., Zhang, Y., Xu, G., Chen, G."Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells". Oncology Reports 41, no. 4 (2019): 2181-2193. https://doi.org/10.3892/or.2019.7013
Copy and paste a formatted citation
x
Spandidos Publications style
Zhuo Z, Song Z, Ma Z, Zhang Y, Xu G and Chen G: Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells. Oncol Rep 41: 2181-2193, 2019.
APA
Zhuo, Z., Song, Z., Ma, Z., Zhang, Y., Xu, G., & Chen, G. (2019). Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells. Oncology Reports, 41, 2181-2193. https://doi.org/10.3892/or.2019.7013
MLA
Zhuo, Z., Song, Z., Ma, Z., Zhang, Y., Xu, G., Chen, G."Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells". Oncology Reports 41.4 (2019): 2181-2193.
Chicago
Zhuo, Z., Song, Z., Ma, Z., Zhang, Y., Xu, G., Chen, G."Chlorophyllin e6‑mediated photodynamic therapy inhibits proliferation and induces apoptosis in human bladder cancer cells". Oncology Reports 41, no. 4 (2019): 2181-2193. https://doi.org/10.3892/or.2019.7013
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