Open Access

Butyrate enhances the efficacy of radiotherapy via FOXO3A in colorectal cancer patient‑derived organoids

  • Authors:
    • Misun Park
    • Junhye Kwon
    • Hye‑Jin Shin
    • Sun Mi Moon
    • Sang Bum Kim
    • Ui Sup Shin
    • Young‑Hoon Han
    • Younjoo Kim
  • View Affiliations

  • Published online on: October 13, 2020     https://doi.org/10.3892/ijo.2020.5132
  • Pages: 1307-1318
  • Copyright: © Park et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Enhancing the radioresponsiveness of colorectal cancer (CRC) is essential for local control and prognosis. However, consequent damage to surrounding healthy cells can lead to treatment failure. We hypothesized that short‑chain fatty acids (SCFAs) could act as radiosensitizers for cancer cells, allowing the administration of a lower and safer dose of radiation. To test this hypothesis, the responses of three‑dimensional‑cultured organoids, derived from CRC patients, to radiotherapy, as well as the effects of combined radiotherapy with the SCFAs butyrate, propionate and acetate as candidate radiosensitizers, were evaluated via reverse transcription‑quantitative polymerase chain reaction, immunohistochemistry and organoid viability assay. Of the three SCFAs tested, only butyrate suppressed the proliferation of the organoids. Moreover, butyrate significantly enhanced radiation‑induced cell death and enhanced treatment effects compared with administration of radiation alone. The radiation‑butyrate combination reduced the proportion of Ki‑67 (proliferation marker)‑positive cells and decreased the number of S phase cells via FOXO3A. Meanwhile, 3/8 CRC organoids were found to be non‑responsive to butyrate with lower expression levels of FOXO3A compared with the responsive cases. Notably, butyrate did not increase radiation‑induced cell death and improved regeneration capacity after irradiation in normal organoids. These results suggest that butyrate could enhance the efficacy of radiotherapy while protecting the normal mucosa, thus highlighting a potential strategy for minimizing the associated toxicity of radiotherapy.
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December-2020
Volume 57 Issue 6

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Park M, Kwon J, Shin HJ, Moon SM, Kim SB, Shin US, Han YH and Kim Y: Butyrate enhances the efficacy of radiotherapy via FOXO3A in colorectal cancer patient‑derived organoids. Int J Oncol 57: 1307-1318, 2020.
APA
Park, M., Kwon, J., Shin, H., Moon, S.M., Kim, S.B., Shin, U.S. ... Kim, Y. (2020). Butyrate enhances the efficacy of radiotherapy via FOXO3A in colorectal cancer patient‑derived organoids. International Journal of Oncology, 57, 1307-1318. https://doi.org/10.3892/ijo.2020.5132
MLA
Park, M., Kwon, J., Shin, H., Moon, S. M., Kim, S. B., Shin, U. S., Han, Y., Kim, Y."Butyrate enhances the efficacy of radiotherapy via FOXO3A in colorectal cancer patient‑derived organoids". International Journal of Oncology 57.6 (2020): 1307-1318.
Chicago
Park, M., Kwon, J., Shin, H., Moon, S. M., Kim, S. B., Shin, U. S., Han, Y., Kim, Y."Butyrate enhances the efficacy of radiotherapy via FOXO3A in colorectal cancer patient‑derived organoids". International Journal of Oncology 57, no. 6 (2020): 1307-1318. https://doi.org/10.3892/ijo.2020.5132