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Article Open Access

Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression

  • Authors:
    • Xuejun Chen
    • Chunxia Zhou
    • Chunxiao Yan
    • Jiong Ma
    • Wei Zheng
  • View Affiliations / Copyright

    Affiliations: Department of Gynecology, Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310006, P.R. China
    Copyright: © Chen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2055-2062
    |
    Published online on: October 26, 2015
       https://doi.org/10.3892/etm.2015.2833
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Abstract

Aquaporins (AQPs) are important mediators of water permeability and are closely associated with tumor cell proliferation, migration, angiogenesis and chemoresistance. Moreover, the chemosensitivity of tumor cells to cisplatin (CDDP) is potentially affected by osmotic pressure. The present study was undertaken to determine whether hyperosmosis regulates ovarian cancer cell sensitivity to CDDP in vitro and to explore whether this is associated with AQP expression. The hyperosmotic stress was induced by D‑sorbitol. 3AO ovarian cancer cells were treated with different concentrations of hypertonic medium and/or CDDP for various times, followed by measuring the inhibition rate of cell proliferation using an MTT assay. In addition, AQP expression in response to osmotic pressure and/or CDDP was measured by reverse transcription‑quantitative polymerase chain reaction and western blotting. Cell proliferation in response to hypertonic stress was also measured when AQP5 was knocked down by small interfering (si)RNA. 3AO cell proliferation was inhibited by hyperosmotic stress, while the expression of AQP5, but not that of AQP1, AQP3 or AQP9, was increased in a dose‑ and time‑dependent manner in hypertonic sorbitol‑containing medium. When AQP5 was silenced by siRNA, cells were susceptible to hypertonic stress. MTT analyses showed that the inhibition of cell proliferation by a low dose of CDDP increased significantly with exposure to a hyperosmotic stimulus, and this effect was reduced when a high dose of CDDP was used. AQP5 expression was induced by a low dose of CDDP, but was reduced by a high dose of CDDP. However, hyperosmosis enhanced AQP5 mRNA expression at every dose of CDDP tested, compared with isotonic medium. With prolonged treatment time, AQP5 expression was reduced by CDDP in hypertonic and isotonic culture medium. Thus, the effects of hyperosmosis on cell sensitivity to CDDP were associated with AQP5 expression. These results suggest that AQP5 expression in ovarian cancer cells is induced by hypertonic medium, and that the sensitivity of ovarian cancer cells to CDDP can be regulated by hyperosmosis associated with AQP5 expression.
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Copy and paste a formatted citation
Spandidos Publications style
Chen X, Zhou C, Yan C, Ma J and Zheng W: Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression. Exp Ther Med 10: 2055-2062, 2015.
APA
Chen, X., Zhou, C., Yan, C., Ma, J., & Zheng, W. (2015). Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression. Experimental and Therapeutic Medicine, 10, 2055-2062. https://doi.org/10.3892/etm.2015.2833
MLA
Chen, X., Zhou, C., Yan, C., Ma, J., Zheng, W."Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression". Experimental and Therapeutic Medicine 10.6 (2015): 2055-2062.
Chicago
Chen, X., Zhou, C., Yan, C., Ma, J., Zheng, W."Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression". Experimental and Therapeutic Medicine 10, no. 6 (2015): 2055-2062. https://doi.org/10.3892/etm.2015.2833
Copy and paste a formatted citation
x
Spandidos Publications style
Chen X, Zhou C, Yan C, Ma J and Zheng W: Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression. Exp Ther Med 10: 2055-2062, 2015.
APA
Chen, X., Zhou, C., Yan, C., Ma, J., & Zheng, W. (2015). Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression. Experimental and Therapeutic Medicine, 10, 2055-2062. https://doi.org/10.3892/etm.2015.2833
MLA
Chen, X., Zhou, C., Yan, C., Ma, J., Zheng, W."Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression". Experimental and Therapeutic Medicine 10.6 (2015): 2055-2062.
Chicago
Chen, X., Zhou, C., Yan, C., Ma, J., Zheng, W."Hyperosmotic stress induces cisplatin sensitivity in ovarian cancer cells by stimulating aquaporin-5 expression". Experimental and Therapeutic Medicine 10, no. 6 (2015): 2055-2062. https://doi.org/10.3892/etm.2015.2833
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