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Norcantharidin induces autophagy-related prostate cancer cell death through Beclin-1 upregulation by miR-129-5p suppression

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Tumor Biology

Abstract

Norcantharidin (NCTD) has an anticancer potential to allow it to be used in the treatment of some malignant cancers. However, whether NCTD may have similar anticancer effects on prostate cancer (PC) is unknown. Here, we aimed to examine the effects of NCTD on PC cells and the underlying mechanisms. We found that NCTD dose-dependently inhibited the PC cell growth, in either a cell counting kit-8 (CCK-8) assay or a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Moreover, NCTD dose-dependently increased the PC cell autophagy, through upregulation of Beclin-1. Furthermore, the Beclin-1 protein, but not mRNA, was regulated by NCTD in PC cells, suggesting post-transcriptional control of Beclin-1 by NCTD. Finally, microRNA (miR)-129-5p was found to be regulated by NCTD, and bioinformatics analyses showed that miR-129-5p targeted the 3′-UTR of Beclin-1 mRNA to inhibit its translation, which was confirmed by luciferase reporter assay. Together, these data suggest that NCTD may upregulate Beclin-1 through suppression of miR-129-5p to induce autophagic cell death and cell proliferation arrest in PC cells. Our study sheds light on using NCTD as a novel treatment for PC.

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Authors and Affiliations

  1. Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China

    Wenjun Xiao, Bo Dai, Yao Zhu & Dingwei Ye

  2. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China

    Wenjun Xiao, Bo Dai, Yao Zhu & Dingwei Ye

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  1. Wenjun Xiao
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  2. Bo Dai
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Correspondence to Dingwei Ye.

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Xiao, W., Dai, B., Zhu, Y. et al. Norcantharidin induces autophagy-related prostate cancer cell death through Beclin-1 upregulation by miR-129-5p suppression. Tumor Biol. 37, 15643–15648 (2016). https://doi.org/10.1007/s13277-015-4488-6

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  • DOI: https://doi.org/10.1007/s13277-015-4488-6

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