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International Journal of Molecular Medicine
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Article

STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells

  • Authors:
    • Chien-Hung Lin
    • Ming-Chang Chiang
    • Yann-Jang Chen
  • View Affiliations / Copyright

    Affiliations: Institute of Clinical Medicine, National Yang-Ming University, Taipei 112, Taiwan, R.O.C., Department of Life Science, College of Science and Engineering, Fu Jen Catholic University, New Taipei City 24205, Taiwan, R.O.C.
  • Pages: 1549-1556
    |
    Published online on: September 25, 2017
       https://doi.org/10.3892/ijmm.2017.3151
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Abstract

Nasopharyngeal carcinoma (NPC), a tumor arising from the epithelial cells of the nasopharynx, is endemic in Southeast Asia and Taiwan. The prognosis of NPC patients with local recurrence and metastasis is poor. Resistance to anoikis is a primary characteristic of tumor cells that metastasize. However, the mechanism through which NPC cells resist anoikis and are able to metastasize has not been fully elucidated. In the present study, the acquisition of anoikis resistance was analyzed in the TW01 and TW06 human NPC cell lines growing under anchorage-independent conditions. A considerable number of TW01 and TW06 cells was found to be resistant to anoikis and exhibited a higher capability of migration and invasion. These anoikis-resistant NPC cells exhibited significantly increased expression of signal transducer and activation of transcription 3 (Stat3) compared with adherent cells. Furthermore, blockade of STAT3 expression by STAT3 inhibitors or STAT3 silencing significant increased anoikis in anoikis-resistant NPC cells. Moreover, silencing STAT3 not only reduced the capacity of NPC cells to resist anoikis, but also reversed their invasive properties. The expression of epithelial‑to-mesenchymal transition‑related proteins and CD44 was also significantly decreased following STAT3 knockdown. The results of the present study established that STAT3 mediates anoikis resistance, with enhanced cell migration and invasion of NPC cells, and that activation of STAT3 may increase metastatic capacity, indicating the crucial role of STAT3 in conferring anoikis resistance and enhanced invasive properties to NPC cells.
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Copy and paste a formatted citation
Spandidos Publications style
Lin C, Chiang M and Chen Y: STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells. Int J Mol Med 40: 1549-1556, 2017.
APA
Lin, C., Chiang, M., & Chen, Y. (2017). STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells. International Journal of Molecular Medicine, 40, 1549-1556. https://doi.org/10.3892/ijmm.2017.3151
MLA
Lin, C., Chiang, M., Chen, Y."STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells". International Journal of Molecular Medicine 40.5 (2017): 1549-1556.
Chicago
Lin, C., Chiang, M., Chen, Y."STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells". International Journal of Molecular Medicine 40, no. 5 (2017): 1549-1556. https://doi.org/10.3892/ijmm.2017.3151
Copy and paste a formatted citation
x
Spandidos Publications style
Lin C, Chiang M and Chen Y: STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells. Int J Mol Med 40: 1549-1556, 2017.
APA
Lin, C., Chiang, M., & Chen, Y. (2017). STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells. International Journal of Molecular Medicine, 40, 1549-1556. https://doi.org/10.3892/ijmm.2017.3151
MLA
Lin, C., Chiang, M., Chen, Y."STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells". International Journal of Molecular Medicine 40.5 (2017): 1549-1556.
Chicago
Lin, C., Chiang, M., Chen, Y."STAT3 mediates resistance to anoikis and promotes invasiveness of nasopharyngeal cancer cells". International Journal of Molecular Medicine 40, no. 5 (2017): 1549-1556. https://doi.org/10.3892/ijmm.2017.3151
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