Open Access

Curcumin induces G2/M arrest and triggers apoptosis via FoxO1 signaling in U87 human glioma cells

  • Authors:
    • Chao Cheng
    • Jian‑Tong Jiao
    • Yu Qian
    • Xiao‑Yi Guo
    • Jin Huang
    • Min‑Chao Dai
    • Lei Zhang
    • Xiao‑Peng Ding
    • Da Zong
    • Jun‑Fei Shao
  • View Affiliations

  • Published online on: March 21, 2016     https://doi.org/10.3892/mmr.2016.5037
  • Pages: 3763-3770
  • Copyright: © Cheng et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

It has previously been demonstrated that curcumin possesses an antitumor activity, which is associated with its ability to induce G2/M cell cycle arrest and apoptosis. However the detailed underlying mechanisms remain unclear. The present study aimed to investigate the efficacy and underlying mechanism of curcumin‑induced cell cycle arrest and apoptosis in U87 human glioblastoma cells. By immunofluorescence staining, subcellular fractionation and western blotting, the present study demonstrated that curcumin was able to induce G2/M cell cycle arrest and apoptosis by increasing the expression levels of cyclin G2, cleaved caspase‑3 and Fas ligand (FasL), and decreasing the expression of cyclin‑dependent kinase 1 (CDK1). In addition, increased expression of forkhead box protein O1 (FoxO1) and decreased expression of phosphorylated (p)‑FoxO1 were detected in the curcumin‑treated U87 cells. Curcumin was also able to induce the translocation of FoxO1 from the cytoplasm to the nucleus. Furthermore, following knockdown of FoxO1 expression in curcumin‑treated U87 cells using FoxO1 small interfering RNA, the expression levels of cyclin G2, cleaved caspase‑3 and FasL were inhibited; however, the expression levels of CDK1 were not markedly altered. Notably, following knockdown of CDK1 expression under normal conditions, the total expression of FoxO1 was not affected; however, p‑FoxO1 expression was decreased and FoxO1 nuclear expression was increased. Furthermore, curcumin‑induced G2/M cell cycle arrest and apoptosis could be attenuated by FoxO1 knockdown. These results indicated that curcumin may induce G2/M cell cycle arrest and apoptosis in U87 cells by increasing FoxO1 expression. The present study identified a novel mechanism underlying the antitumor effects of curcumin, and may provide a theoretical basis for the application of curcumin in glioma treatment.
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May-2016
Volume 13 Issue 5

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Cheng C, Jiao JT, Qian Y, Guo XY, Huang J, Dai MC, Zhang L, Ding XP, Zong D, Shao JF, Shao JF, et al: Curcumin induces G2/M arrest and triggers apoptosis via FoxO1 signaling in U87 human glioma cells. Mol Med Rep 13: 3763-3770, 2016
APA
Cheng, C., Jiao, J., Qian, Y., Guo, X., Huang, J., Dai, M. ... Shao, J. (2016). Curcumin induces G2/M arrest and triggers apoptosis via FoxO1 signaling in U87 human glioma cells. Molecular Medicine Reports, 13, 3763-3770. https://doi.org/10.3892/mmr.2016.5037
MLA
Cheng, C., Jiao, J., Qian, Y., Guo, X., Huang, J., Dai, M., Zhang, L., Ding, X., Zong, D., Shao, J."Curcumin induces G2/M arrest and triggers apoptosis via FoxO1 signaling in U87 human glioma cells". Molecular Medicine Reports 13.5 (2016): 3763-3770.
Chicago
Cheng, C., Jiao, J., Qian, Y., Guo, X., Huang, J., Dai, M., Zhang, L., Ding, X., Zong, D., Shao, J."Curcumin induces G2/M arrest and triggers apoptosis via FoxO1 signaling in U87 human glioma cells". Molecular Medicine Reports 13, no. 5 (2016): 3763-3770. https://doi.org/10.3892/mmr.2016.5037