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MicroRNA-294 promotes cellular proliferation and motility through the PI3K/AKT and JAK/STAT pathways by upregulation of NRAS in bladder cancer

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Abstract

In our study we examined the role of microRNA-294 (miR-294) in bladder cancer and related mechanisms. Realtime polymerase chain reaction (RT-PCR) was performed to determine the expression level of miR-294. Western blot was used to determine the expression of NRAS, mainly factors in the PI3K/AKT and JAK/STAT pathways. Cell counting kit8 assay, clonogenic assay, wound-healing assay, transwell and flow cytometry were used to explore, respectively, cell proliferation, survival, migration, invasion, and apoptosis of bladder cancer cell line T24. The expressions of miR-294 in bladder cancer cells including J82, HT1376, T24, and SW780 were significantly increased compared to those in human bladder epithelium cells (both HCV29 and SV-HUC-1). The proliferation rate, surviving fraction, migration, and invasion of T24 cells in miR-294 mimetic transfected group were significantly increased, while they were significantly decreased by miR294 inhibitor transfection. Moreover, miR-294 suppression could increase the apoptotic rate of T24 cells. In addition, drug resistance of T24 cells to cisplatin was increased in miR-294 mimetic-treated group, while it was decreased by miR-294 inhibitor compared to empty control. Overexpression of miR-294 could upregulate NRAS expression in T24 cells and activate PI3K/AKT and JAK/STAT pathways. We found that miR-294 expression was positively related with proliferation and motility of T24 cells. Moreover, miR-294 suppression could promote the sensitivity of T24 cells to cisplatin. We also found miR-294 could upregulate NRAS and activate the PI3K/AKT and JAK/STAT pathways in T24 cells.

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Authors and Affiliations

  1. Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, 264000, China

    Yongwei Li, Zhengfei Shan, Chu Liu, Diandong Yang, Jitao Wu & Changping Men

  2. Department of Urology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, 264100, China

    Yankai Xu

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  1. Yongwei Li
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  2. Zhengfei Shan
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  3. Chu Liu
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  4. Diandong Yang
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  5. Jitao Wu
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  6. Changping Men
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Correspondence to Jitao Wu.

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These authors contributed equally to this work.

Published in Russian in Biokhimiya, 2017, Vol. 82, No. 4, pp. 644-654.

Originally published in Biochemistry (Moscow) On-Line Papers in Press, as Manuscript BM16-330, December 26, 2016.

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Li, Y., Shan, Z., Liu, C. et al. MicroRNA-294 promotes cellular proliferation and motility through the PI3K/AKT and JAK/STAT pathways by upregulation of NRAS in bladder cancer. Biochemistry Moscow 82, 474–482 (2017). https://doi.org/10.1134/S0006297917040095

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  • DOI: https://doi.org/10.1134/S0006297917040095

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