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International Journal of Molecular Medicine
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August 2013 Volume 32 Issue 2

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HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo

  • Authors:
    • Wei Li
    • Yu-Qing Chen
    • Yuan-Bing Shen
    • Hong-Mei Shu
    • Xiao-Jing Wang
    • Cheng-Ling Zhao
    • Chang-Jie Chen
  • View Affiliations / Copyright

    Affiliations: Department of Respiration, First Affiliated Hospital, Bengbu Medical College, Provincial Key Laboratory of Respiratory disease in Anhui, Bengbu, Anhui 233004, P.R. China, Department of Biochemistry, First Affiliated Hospital, Bengbu Medical College, Provincial Key Laboratory of Respiratory disease in Anhui, Bengbu, Anhui 233004, P.R. China
    Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 271-280
    |
    Published online on: June 4, 2013
       https://doi.org/10.3892/ijmm.2013.1405
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Abstract

The present study examined the downregulation of survivin expression by hypoxia-inducible factor-1α (HIF-1α) miRNA and its effect in the inhibition of A549 cell growth in vitro and in vivo. Survivin expression, apoptosis, proliferation and migration under normoxic and hypoxic conditions were assessed by standard methods. Cotransfection and chromatin immunoprecipitation were used to observe the effects of HIF-1α on survivin transcription. HIF-1α knockdown in A549 cells were injected into nude mice to examine survivin expression and suppression of tumorigenicity. Transfection of A549 cells with HIF-1α miRNA led to decreased expression of HIF-1α and survivin mRNA and protein. Survivin overexpression is mediated by HIF-1α by direct binding to a putative binding site in the survivin core promoter. HIF-1α-miRNA induced apoptosis and inhibited proliferation of A549 cells under hypoxic, but not normoxic, conditions, whereas transfection by survivin expression vectors partly rescued the apoptotic phenotype and revived cell proliferation under hypoxic conditions. However, cell migration was substantially suppressed by HIF-1α silencing under normoxic and hypoxic conditions. After A549 cells were xenografted in nude mice, survivin expression in mice treated with HIF-1α miRNA was downregulated, and tumor growth was significantly inhibited. Silenced HIF-1α gene expression induced apoptosis and suppressed growth of A549 cells by downregulating survivin expression in vitro and in vivo. Our results also provide a basis to target the HIF-1α pathway in lung cancer therapy.
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Copy and paste a formatted citation
Spandidos Publications style
Li W, Chen Y, Shen Y, Shu H, Wang X, Zhao C and Chen C: HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo. Int J Mol Med 32: 271-280, 2013.
APA
Li, W., Chen, Y., Shen, Y., Shu, H., Wang, X., Zhao, C., & Chen, C. (2013). HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo. International Journal of Molecular Medicine, 32, 271-280. https://doi.org/10.3892/ijmm.2013.1405
MLA
Li, W., Chen, Y., Shen, Y., Shu, H., Wang, X., Zhao, C., Chen, C."HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo". International Journal of Molecular Medicine 32.2 (2013): 271-280.
Chicago
Li, W., Chen, Y., Shen, Y., Shu, H., Wang, X., Zhao, C., Chen, C."HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo". International Journal of Molecular Medicine 32, no. 2 (2013): 271-280. https://doi.org/10.3892/ijmm.2013.1405
Copy and paste a formatted citation
x
Spandidos Publications style
Li W, Chen Y, Shen Y, Shu H, Wang X, Zhao C and Chen C: HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo. Int J Mol Med 32: 271-280, 2013.
APA
Li, W., Chen, Y., Shen, Y., Shu, H., Wang, X., Zhao, C., & Chen, C. (2013). HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo. International Journal of Molecular Medicine, 32, 271-280. https://doi.org/10.3892/ijmm.2013.1405
MLA
Li, W., Chen, Y., Shen, Y., Shu, H., Wang, X., Zhao, C., Chen, C."HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo". International Journal of Molecular Medicine 32.2 (2013): 271-280.
Chicago
Li, W., Chen, Y., Shen, Y., Shu, H., Wang, X., Zhao, C., Chen, C."HIF-1α knockdown by miRNA decreases survivin expression and inhibits A549 cell growth in vitro and in vivo". International Journal of Molecular Medicine 32, no. 2 (2013): 271-280. https://doi.org/10.3892/ijmm.2013.1405
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