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Article

Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo

  • Authors:
    • Xiaoming Li
    • Hairu Wang
    • Xiuying Lu
    • Bin Di
  • View Affiliations / Copyright

    Affiliations: Department of Otolaryngology-Head and Neck Surgery, Bethune International Peace Hospital, Shijiazhuang, Hebei 050082, P.R. China, The Pepole's Hospital of Haikou, Haikou, Hainan 570208, P.R. China
  • Pages: 947-953
    |
    Published online on: September 29, 2010
       https://doi.org/10.3892/etm.2010.156
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Abstract

Short hairpin RNA (shRNA) targeting signal transducer and activator of transcription 3 (STAT3) potentiate the radiosensitivity of human laryngeal squamous carcinoma cells in vitro. In the present study, we investigated the inhibitory effect of STAT3 shRNA plus radiotherapy on nude mouse laryngeal squamous cell carcinoma xenografts. The xenotransplanted tumors were treated with STAT3 shRNA, with or without radiation, following a planned scheme. The inhibition rate for tumor growth was calculated and the tumor growth curve was plotted. In addition, the expression of p-STAT3, B cell lymphoma 2 (Bcl-2), p53, vascular endothelial growth factor (VEGF) protein and intratumoral microvessel density (MVD) was determined by immunohistochemistry. Flow cytometry was used to detect the rate of cell apoptosis. The results revealed that STAT3 shRNA transfection plus radiotherapy significantly minimized tumor volume and increased the rate of tumor inhibition. p-STAT3 protein expression and intratumoral MVD were observed to be down-regulated, whereas apoptosis was increased. There was a positive correlation between the expression of p-STAT3 and Bcl-2, and also between the expression of p53 and VEGF, and MVD. These findings indicate that STAT3 shRNA potentiate the radiosensitivity of laryngeal carcinoma xenografts in vivo by regulating downstream signaling proteins in the STAT3 pathway.
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Copy and paste a formatted citation
Spandidos Publications style
Li X, Wang H, Lu X and Di B: Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo. Exp Ther Med 1: 947-953, 2010.
APA
Li, X., Wang, H., Lu, X., & Di, B. (2010). Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo. Experimental and Therapeutic Medicine, 1, 947-953. https://doi.org/10.3892/etm.2010.156
MLA
Li, X., Wang, H., Lu, X., Di, B."Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo". Experimental and Therapeutic Medicine 1.6 (2010): 947-953.
Chicago
Li, X., Wang, H., Lu, X., Di, B."Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo". Experimental and Therapeutic Medicine 1, no. 6 (2010): 947-953. https://doi.org/10.3892/etm.2010.156
Copy and paste a formatted citation
x
Spandidos Publications style
Li X, Wang H, Lu X and Di B: Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo. Exp Ther Med 1: 947-953, 2010.
APA
Li, X., Wang, H., Lu, X., & Di, B. (2010). Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo. Experimental and Therapeutic Medicine, 1, 947-953. https://doi.org/10.3892/etm.2010.156
MLA
Li, X., Wang, H., Lu, X., Di, B."Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo". Experimental and Therapeutic Medicine 1.6 (2010): 947-953.
Chicago
Li, X., Wang, H., Lu, X., Di, B."Silencing STAT3 with short hairpin RNA enhances radiosensitivity of human laryngeal squamous cell carcinoma xenografts in vivo". Experimental and Therapeutic Medicine 1, no. 6 (2010): 947-953. https://doi.org/10.3892/etm.2010.156
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