Comparative effects of SNX-7081 and SNX-2112 on cell cycle, apoptosis and Hsp90 client proteins in human cancer cells

  • Authors:
    • Xiao Wang
    • Shaoxiang Wang
    • Yuting Liu
    • Dane Huang
    • Kai Zheng
    • Yi Zhang
    • Xiaoyan Wang
    • Qiuying Liu
    • Depo Yang
    • Yifei Wang
  • View Affiliations

  • Published online on: October 20, 2014     https://doi.org/10.3892/or.2014.3552
  • Pages: 230-238
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Abstract

SNX-2112, a novel 2-aminobenzamide inhibitor of Hsp90, previously showed a broad spectrum of anticancer activity. However, subsequent development has been discontinued due to ocular toxicity as identified in a phase I study. SNX-7081, another closely related Hsp90 inhibitor with a side chain of indole instead of indazole, has recently attracted attention. The aim of the present study was to investigate the anticancer effects of SNX-7081 in eleven cell lines, as well as the mechanisms involved, with SNX-2112 serving as a reference. The cytotoxic effects were determined using an MTT assay and apoptosis was measured using flow cytometry. The results showed that SNX-7081 exerted better inhibitory effects than SNX-2112 in six eighths of the human cancer cell lines, with an average IC50 of 1 µM. The two inhibitors exerted low cytotoxicity in L-02, HDF and MRC5 normal human cells (IC50 >50 µM), and arrested cancer cells at the G2/M phase in a similar manner to normal cells. Compared with SNX-2112, SNX-7081 exhibited more potent effects on cell apoptosis in four sixths of the human cancer cell lines, and was more active in the downregulation of Hsp90 client proteins. In addition, SNX-7081 exhibited a stronger binding affinity to Hsp90 than SNX-2112 in molecular docking experiments. Considering the superior effects against Hsp90 affinity, cell growth, apoptosis, and Hsp90 client proteins in a majority of human cancer cells, the novel SNX-7081 may be a promising alternative to SNX-2112, which merits further evaluation.
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January-2015
Volume 33 Issue 1

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

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Spandidos Publications style
Wang X, Wang S, Liu Y, Huang D, Zheng K, Zhang Y, Wang X, Liu Q, Yang D, Wang Y, Wang Y, et al: Comparative effects of SNX-7081 and SNX-2112 on cell cycle, apoptosis and Hsp90 client proteins in human cancer cells. Oncol Rep 33: 230-238, 2015.
APA
Wang, X., Wang, S., Liu, Y., Huang, D., Zheng, K., Zhang, Y. ... Wang, Y. (2015). Comparative effects of SNX-7081 and SNX-2112 on cell cycle, apoptosis and Hsp90 client proteins in human cancer cells. Oncology Reports, 33, 230-238. https://doi.org/10.3892/or.2014.3552
MLA
Wang, X., Wang, S., Liu, Y., Huang, D., Zheng, K., Zhang, Y., Wang, X., Liu, Q., Yang, D., Wang, Y."Comparative effects of SNX-7081 and SNX-2112 on cell cycle, apoptosis and Hsp90 client proteins in human cancer cells". Oncology Reports 33.1 (2015): 230-238.
Chicago
Wang, X., Wang, S., Liu, Y., Huang, D., Zheng, K., Zhang, Y., Wang, X., Liu, Q., Yang, D., Wang, Y."Comparative effects of SNX-7081 and SNX-2112 on cell cycle, apoptosis and Hsp90 client proteins in human cancer cells". Oncology Reports 33, no. 1 (2015): 230-238. https://doi.org/10.3892/or.2014.3552