SIRT3 participates in glucose metabolism interruption and apoptosis induced by BH3 mimetic S1 in ovarian cancer cells

  • Authors:
    • Xi-Yan Xiang
    • Jin-Song Kang
    • Xiao-Chun Yang
    • Jing Su
    • Yao Wu
    • Xiao-Yu Yan
    • Ya-Nan Xue
    • Ye Xu
    • Yu-He Liu
    • Chun-Yan Yu
    • Zhi-Chao Zhang
    • Lian-Kun Sun
  • View Affiliations

  • Published online on: June 1, 2016     https://doi.org/10.3892/ijo.2016.3552
  • Pages: 773-784
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Abstract

The Bcl-2 antiapoptotic proteins are important cancer therapy targets; however, their role in cancer cell metabolism remains unclear. We found that the BH3-only protein mimetic S1, a novel pan Bcl-2 inhibitor, simultaneously interrupted glucose metabolism and induced apoptosis in human SKOV3 ovarian cancer cells, which was related to the activation of SIRT3, a stress-responsive deacetylase. S1 interrupted the cellular glucose metabolism mainly through causing damage to mitochondrial respiration and inhibiting glycolysis. Moreover, S1 upregulated the gene and protein expression of SIRT3, and induced the translocation of SIRT3 from the nucleus to mitochondria. SIRT3 silencing reversed the effects of S1 on glucose metabolism and apoptosis through increasing the level of HK-II localized to the mitochondria, while a combination of the glycolysis inhibitor 2-DG and S1 intensified the cytotoxicity through further upregulation of SIRT3 expression. This study underscores an essential role of SIRT3 in the antitumor effect of Bcl-2 inhibitors in human ovarian cancer through regulating both metabolism and apoptosis. The manipulation of Bcl-2 inhibitors combined with the use of classic glycolysis inhibitors may be rational strategies to improve ovarian cancer therapy.
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August-2016
Volume 49 Issue 2

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

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Spandidos Publications style
Xiang X, Kang J, Yang X, Su J, Wu Y, Yan X, Xue Y, Xu Y, Liu Y, Yu C, Yu C, et al: SIRT3 participates in glucose metabolism interruption and apoptosis induced by BH3 mimetic S1 in ovarian cancer cells. Int J Oncol 49: 773-784, 2016
APA
Xiang, X., Kang, J., Yang, X., Su, J., Wu, Y., Yan, X. ... Sun, L. (2016). SIRT3 participates in glucose metabolism interruption and apoptosis induced by BH3 mimetic S1 in ovarian cancer cells. International Journal of Oncology, 49, 773-784. https://doi.org/10.3892/ijo.2016.3552
MLA
Xiang, X., Kang, J., Yang, X., Su, J., Wu, Y., Yan, X., Xue, Y., Xu, Y., Liu, Y., Yu, C., Zhang, Z., Sun, L."SIRT3 participates in glucose metabolism interruption and apoptosis induced by BH3 mimetic S1 in ovarian cancer cells". International Journal of Oncology 49.2 (2016): 773-784.
Chicago
Xiang, X., Kang, J., Yang, X., Su, J., Wu, Y., Yan, X., Xue, Y., Xu, Y., Liu, Y., Yu, C., Zhang, Z., Sun, L."SIRT3 participates in glucose metabolism interruption and apoptosis induced by BH3 mimetic S1 in ovarian cancer cells". International Journal of Oncology 49, no. 2 (2016): 773-784. https://doi.org/10.3892/ijo.2016.3552