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Article Open Access

Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids

Corrigendum in: /10.3892/ijo.2022.5397
  • Authors:
    • Eunbi Ye
    • Jung Eun Lee
    • Young-Soo Lim
    • Seung Ho Yang
    • Sung-Min Park
  • View Affiliations / Copyright

    Affiliations: Department of Convergence IT Engineering, Pohang University of Science and Technology, Pohang‑si, Gyeongsangbuk‑do 37673, Republic of Korea, Department of Neurosurgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon‑si, Gyeonggi‑do 16247, Republic of Korea
    Copyright: © Ye et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 8
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    Published online on: December 28, 2021
       https://doi.org/10.3892/ijo.2021.5298
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Abstract

Tumor‑treating fields (TTFields) are emerging cancer therapies based on alternating low‑intensity electric fields that interfere with dividing cells and induce cancer cell apoptosis. However, to date, there is limited knowledge of their effects on normal cells, as well as the effects of different duty cycles on outcomes. The present study evaluated the effects of TTFields with different duty cycles on glioma spheroid cells and normal brain organoids. A customized TTFields system was developed to perform in vitro experiments with varying duty cycles. Three duty cycles were applied to three types of glioma spheroid cells and brain organoids. The efficacy and safety of the TTFields were evaluated by analyzing the cell cycle of glioma cells, and markers of neural stem cells (NSCs) and astrocytes in brain organoids. The application of the TTFields at the 75 and 100% duty cycle markedly inhibited the proliferation of the U87 and U373 compared with the control. FACS analysis revealed that the higher the duty cycle of the applied fields, the greater the increase in apoptosis detected. Exposure to a higher duty cycle resulted in a greater decrease in NSC markers and a greater increase in glial fibrillary acidic protein expression in normal brain organoids. These results suggest that TTFields at the 75 and 100% duty cycle induced cancer cell death, and that the neurotoxicity of the TTFields at 75% was less prominent than that at 100%. Although clinical studies with endpoints related to safety and efficacy need to be performed before this strategy may be adopted clinically, the findings of the present study provide meaningful evidence for the further advancement of TTFields in the treatment of various types of cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Ye E, Lee JE, Lim Y, Yang SH and Park S: Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids Corrigendum in /10.3892/ijo.2022.5397. Int J Oncol 60: 8, 2022.
APA
Ye, E., Lee, J.E., Lim, Y., Yang, S.H., & Park, S. (2022). Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids Corrigendum in /10.3892/ijo.2022.5397. International Journal of Oncology, 60, 8. https://doi.org/10.3892/ijo.2021.5298
MLA
Ye, E., Lee, J. E., Lim, Y., Yang, S. H., Park, S."Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids Corrigendum in /10.3892/ijo.2022.5397". International Journal of Oncology 60.1 (2022): 8.
Chicago
Ye, E., Lee, J. E., Lim, Y., Yang, S. H., Park, S."Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids Corrigendum in /10.3892/ijo.2022.5397". International Journal of Oncology 60, no. 1 (2022): 8. https://doi.org/10.3892/ijo.2021.5298
Copy and paste a formatted citation
x
Spandidos Publications style
Ye E, Lee JE, Lim Y, Yang SH and Park S: Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids Corrigendum in /10.3892/ijo.2022.5397. Int J Oncol 60: 8, 2022.
APA
Ye, E., Lee, J.E., Lim, Y., Yang, S.H., & Park, S. (2022). Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids Corrigendum in /10.3892/ijo.2022.5397. International Journal of Oncology, 60, 8. https://doi.org/10.3892/ijo.2021.5298
MLA
Ye, E., Lee, J. E., Lim, Y., Yang, S. H., Park, S."Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids Corrigendum in /10.3892/ijo.2022.5397". International Journal of Oncology 60.1 (2022): 8.
Chicago
Ye, E., Lee, J. E., Lim, Y., Yang, S. H., Park, S."Effect of duty cycles of tumor‑treating fields on glioblastoma cells and normal brain organoids Corrigendum in /10.3892/ijo.2022.5397". International Journal of Oncology 60, no. 1 (2022): 8. https://doi.org/10.3892/ijo.2021.5298
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