Curcumin exerts antitumor effects in retinoblastoma cells by regulating the JNK and p38 MAPK pathways

  • Authors:
    • Xiaoming Yu
    • Jingtao Zhong
    • Li Yan
    • Jie Li
    • Hui Wang
    • Yan Wen
    • Yu Zhao
  • View Affiliations

  • Published online on: July 13, 2016     https://doi.org/10.3892/ijmm.2016.2676
  • Pages: 861-868
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Abstract

Curcumin, a naturally occurring polyphenolic compound present in turmeric (Curcuma longa), exerts antitumor effects in various types of malignancy. However, the precise mechanisms responsible for the effects of curcumin on retinoblastoma (RB) cells have not been fully explored. In the present study, the molecular mechanisms by which curcumin exerts its anticancer effects in RB Y79 cells were investigated. The results showed that curcumin reduced cell viability in Y79 cells. Curcumin induced G1 phase arrest through downregulating the expression of cyclin D3 and cyclin-dependent kinase (CDK)2/6 and upregulating the expression of CDK inhibitor proteins p21 and p27. Curcumin-induced apoptosis of Y79 cells occurred through the activation of caspases-9/-3. Moreover, flow cytometric analysis showed that curcumin induced mitochondrial membrane potential (∆Ψm) collapse in Y79 cells. We also found that curcumin induced the phosphorylation of c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinase (MAPK). JNK and p38 MAPK inhibitors significantly suppressed curcumin‑induced activation of caspases-9/-3 and inhibited the apoptosis of Y79 cells. Taken together, our results suggest that curcumin induced the apoptosis of Y79 cells through the activation of JNK and p38 MAPK pathways. These findings provide a novel treatment strategy for human RB.
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September-2016
Volume 38 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos
Yu X, Zhong J, Yan L, Li J, Wang H, Wen Y and Zhao Y: Curcumin exerts antitumor effects in retinoblastoma cells by regulating the JNK and p38 MAPK pathways. Int J Mol Med 38: 861-868, 2016
APA
Yu, X., Zhong, J., Yan, L., Li, J., Wang, H., Wen, Y., & Zhao, Y. (2016). Curcumin exerts antitumor effects in retinoblastoma cells by regulating the JNK and p38 MAPK pathways. International Journal of Molecular Medicine, 38, 861-868. https://doi.org/10.3892/ijmm.2016.2676
MLA
Yu, X., Zhong, J., Yan, L., Li, J., Wang, H., Wen, Y., Zhao, Y."Curcumin exerts antitumor effects in retinoblastoma cells by regulating the JNK and p38 MAPK pathways". International Journal of Molecular Medicine 38.3 (2016): 861-868.
Chicago
Yu, X., Zhong, J., Yan, L., Li, J., Wang, H., Wen, Y., Zhao, Y."Curcumin exerts antitumor effects in retinoblastoma cells by regulating the JNK and p38 MAPK pathways". International Journal of Molecular Medicine 38, no. 3 (2016): 861-868. https://doi.org/10.3892/ijmm.2016.2676