Abstract
Purpose
Prostate cancer chemoresistance is a major contributor to the poor survival of patients. MicroRNAs (miRNAs) play an important role in regulating cancer resistance. Here we aim to explore the role and mechanism of miR-199a in regulating prostate cancer resistance.
Methods
MiR-199a expressions in human prostate cancer tissues and cell lines were investigated with real-time PCR (RT-PCR). MiR-199a was ectopically overexpressed in PC3 cells, and resistance to paclitaxel (PTX) was evaluated consequently. The interaction between miR-199a and the oncogene Yamaguchi sarcoma viral homolog 1 (YES1) was assessed after miR-199a overexpression. YES1 was ectopically overexpressed, followed by evaluation of PTX resistance. The efficacy of miR-199a as a therapeutic agent was also investigated in vivo.
Results
Downregulation of miR-199a was characteristic of prostate cancer, particularly recurrent cancers. MiR-199a was suppressed in PTX-resistant cell line. Overexpression of miR-199a inhibited PTX resistance. YES1 was a target of miR-199a, and overexpression of YES1 reversed the effect of miR-199a in suppressing PTX resistance. In vivo, miR-199a increased tumor PTX sensitivity.
Conclusions
The downregulation of miR-199a contributes to PTX resistance in prostate cancer. YES1 mediates the regulation of miR-199a in prostate cancer PTX resistance. This miR-199a replacement therapy has potential to overcome PTX resistance.
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LC and HC contributed to data collection and manuscript writing. YF helped in project development and manuscript writing
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This study was supported by The Third Batch of young Chinese Name Training Program of LongHua Hospital Shanghai University of Traditional Chinese Medicine (Chen Lei). Subject number: RC-2017-01-14; Shanghai Municipal Health and Family Planning Commission Special Subject of Chinese Medicine Research: Inhibitory Effect of Indirubin on Proliferation and Induction of Apoptosis in Prostate Cancer DU145 cells. Subject number: 2016JP014.
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None of the authors declare competing financial interests.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. All applicable international, national and/or institutional guidelines for the care and use of animals were followed.
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Chen, L., Cao, H. & Feng, Y. MiR-199a suppresses prostate cancer paclitaxel resistance by targeting YES1. World J Urol 36, 357–365 (2018). https://doi.org/10.1007/s00345-017-2143-0
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DOI: https://doi.org/10.1007/s00345-017-2143-0