Open Access

Genistein and AG1024 synergistically increase the radiosensitivity of prostate cancer cells

  • Authors:
    • Qisheng Tang
    • Jianjun Ma
    • Jinbo Sun
    • Longfei Yang
    • Fan Yang
    • Wei Zhang
    • Ruixiao Li
    • Lei Wang
    • Yong Wang
    • He Wang
  • View Affiliations

  • Published online on: May 30, 2018     https://doi.org/10.3892/or.2018.6468
  • Pages: 579-588
  • Copyright: © Tang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Radiosensitivity of prostate cancer (PCa) cells promotes the curative treatment for PCa. The present study was designed to investigate the synergistic effect of genistein and AG1024 on the radiosensitivity of PCa cells. The optimal X‑irradiation dose (4 Gy) and genistein concentration (30 µM) were selected by using the CCK‑8 assay. Before X‑irradiation (4 Gy), PC3 and DU145 cells were treated with genistein (30 µM), AG1024 (10 µM) and their combination. All treatments significantly reduced cell proliferation and enhanced cell apoptosis. Using flow cytometric analysis, we found that genistein arrested the cell cycle at S phase and AG1024 arrested the cell cycle at G2/M phase. Genistein treatment suppressed the homologous recombination (HRR) and the non‑homologous end joining (NHEJ) pathways by inhibiting the expression of Rad51 and Ku70, and AG1024 treatment only inhibited the NHEJ pathway via the inactivation of Ku70 as detected by western blot analysis. Moreover, the combination treatment with genistein and AG1024 more effectively radiosensitized PCa cells than single treatments by suppressing cell proliferation, enhancing cell apoptosis and inactivating the HRR and NHEJ pathways. In vivo experiments demonstrated that animals receiving the combination treatment with genistein and AG1024 displayed obviously decreased tumor volume compared with animals treated with single treatment with either genistein or AG1024. We conclude that the combination of genistein (30 µM) and AG1024 (10 µM) exhibited a synergistic effect on the radiosensitivity of PCa cells by suppressing the HRR and NHEJ pathways.
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August-2018
Volume 40 Issue 2

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Tang Q, Ma J, Sun J, Yang L, Yang F, Zhang W, Li R, Wang L, Wang Y, Wang H, Wang H, et al: Genistein and AG1024 synergistically increase the radiosensitivity of prostate cancer cells. Oncol Rep 40: 579-588, 2018
APA
Tang, Q., Ma, J., Sun, J., Yang, L., Yang, F., Zhang, W. ... Wang, H. (2018). Genistein and AG1024 synergistically increase the radiosensitivity of prostate cancer cells. Oncology Reports, 40, 579-588. https://doi.org/10.3892/or.2018.6468
MLA
Tang, Q., Ma, J., Sun, J., Yang, L., Yang, F., Zhang, W., Li, R., Wang, L., Wang, Y., Wang, H."Genistein and AG1024 synergistically increase the radiosensitivity of prostate cancer cells". Oncology Reports 40.2 (2018): 579-588.
Chicago
Tang, Q., Ma, J., Sun, J., Yang, L., Yang, F., Zhang, W., Li, R., Wang, L., Wang, Y., Wang, H."Genistein and AG1024 synergistically increase the radiosensitivity of prostate cancer cells". Oncology Reports 40, no. 2 (2018): 579-588. https://doi.org/10.3892/or.2018.6468