Genistein and AG1024 synergistically increase the radiosensitivity of prostate cancer cells.

Genistein and AG1024 synergistically increase the radiosensitivity of prostate cancer cells.
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金雀异黄素和 AG1024 协同增加前列腺癌细胞的放射敏感性

DOI:
10.3892/or.2018.6468
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发表时间:
2018-08
期刊:
影响因子:
4.2
通讯作者:
Wang H
Wang H
中科院分区:
医学3区
文献类型:
--
作者:
Tang Q;Ma J;Sun J;Yang L;Yang F;Zhang W;Li R;Wang L;Wang Y;Wang H

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前列腺癌 (PCa) 细胞的放射敏感性促进了 PCa 的治疗。本研究旨在探讨金雀异黄素和 AG1024 对 PCa 细胞放射敏感性的协同作用。通过 CCK-8 测定选择最佳 X 辐射剂量 (4 Gy) 和金雀异黄素浓度 (30 µM)。在 X 射线照射 (4 Gy) 之前,用金雀异黄素 (30 µM)、AG1024 (10 µM) 及其组合处理 PC3 和 DU145 细胞。所有治疗均显着减少细胞增殖并增强细胞凋亡。使用流式细胞术分析,我们发现金雀异黄素将细胞周期阻滞在 S 期,而 AG1024 将细胞周期阻滞在 G2/M 期。根据蛋白质印迹分析检测,金雀异黄素处理通过抑制 Rad51 和 Ku70 的表达来抑制同源重组 (HRR) 和非同源末端连接 (NHEJ) 途径,而 AG1024 处理仅通过 Ku70 失活来抑制 NHEJ 途径。此外,与单一治疗相比,金雀异黄素和 AG1024 联合治疗通过抑制细胞增殖、增强细胞凋亡和灭活 HRR 和 NHEJ 通路,更有效地使 PCa 细胞放射增敏。体内实验表明,与单独使用金雀异黄素或 AG1024 治疗的动物相比,接受金雀异黄素和 AG1024 联合治疗的动物的肿瘤体积明显减小。我们得出结论,金雀异黄素 (30 µM) 和 AG1024 (10 µM) 的组合通过抑制 HRR 和 NHEJ 途径,对 PCa 细胞的放射敏感性表现出协同作用。
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.
金雀异黄素通过增强细胞凋亡和抑制 DSB 修复途径在体外和体内使肉瘤细胞变得敏感
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发表时间: 2016-03-01
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