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Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance

  • Authors:
    • Jian‑Song Sun
    • Xiu‑Hai Yang
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    Affiliations: Department of Otolaryngology‑Head and Neck Surgery, The People's Hospital of Guizhou Province, Guiyang, Guizhou 550002, P.R. China
    Copyright: © Sun et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3295-3301
    |
    Published online on: February 1, 2018
       https://doi.org/10.3892/etm.2018.5826
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Abstract

The aim of the present study was to explore the expression and distribution of DNA‑dependent protein kinase catalytic subunit (DNA‑PKcs) in tumor tissues and adjacent normal mucosa tissues of patients with laryngeal squamous cell carcinoma (LSCC), and further analyze the association between the expression and the clinicopathological parameters of patients with LSCC. Clinical data of tumor tissues and corresponding adjacent normal mucosa tissues of pathologically diagnosed LSCC in 96 cases were collected in the present study. Of these specimens, the mRNA and protein expression levels of DNA‑PKcs in LSCC tissues and the adjacent normal mucosa tissues were analyzed via reverse transcription‑quantitative polymerase chain reaction and western blot analysis. Immunohistochemistry was used to detect expression and distribution of DNA‑PKcs protein in LSCC tissues and corresponding adjacent normal mucosa tissues. The association between DNA‑PKcs expression and the specific clinicopathologic features was evaluated by the χ2 test. Kaplan‑Meier and Cox proportional hazards regression models were used to analyze the data. It was revealed that the expression of DNA‑PKcs mRNA and protein was significantly higher in LSCC tissues than the adjacent normal mucosa tissues (P<0.05). DNA‑PKcs was expressed predominantly in the nucleus. DNA‑PKcs expression showed significant correlation with the differentiation degree of LSCC (P<0.05), and changes of DNA‑PKcs expression gradually increased with the decrease of the differentiation degree. However, DNA‑PKcs expression was not significantly associated with sex, age, lymph node metastasis or TMN stage (P>0.05). Patients with LSCC exhibited higher DNA‑PKcs expression had markedly shorter survival than those with lower DNA‑PKcs expression. In conclusion, the present results suggested that the expression levels of DNA‑PKcs were significantly increased in LSCC tumor tissues than in adjacent normal mucosa. DNA‑PKcs expression was correlated with differentiation of LSCC, and may become a novel prognostic marker for patients with LSCC.
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Copy and paste a formatted citation
Spandidos Publications style
Sun JS and Yang XH: Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance. Exp Ther Med 15: 3295-3301, 2018.
APA
Sun, J., & Yang, X. (2018). Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance. Experimental and Therapeutic Medicine, 15, 3295-3301. https://doi.org/10.3892/etm.2018.5826
MLA
Sun, J., Yang, X."Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance". Experimental and Therapeutic Medicine 15.4 (2018): 3295-3301.
Chicago
Sun, J., Yang, X."Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance". Experimental and Therapeutic Medicine 15, no. 4 (2018): 3295-3301. https://doi.org/10.3892/etm.2018.5826
Copy and paste a formatted citation
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Spandidos Publications style
Sun JS and Yang XH: Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance. Exp Ther Med 15: 3295-3301, 2018.
APA
Sun, J., & Yang, X. (2018). Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance. Experimental and Therapeutic Medicine, 15, 3295-3301. https://doi.org/10.3892/etm.2018.5826
MLA
Sun, J., Yang, X."Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance". Experimental and Therapeutic Medicine 15.4 (2018): 3295-3301.
Chicago
Sun, J., Yang, X."Expression of DNA‑dependent protein kinase catalytic subunit in laryngeal squamous cell carcinoma and its importance". Experimental and Therapeutic Medicine 15, no. 4 (2018): 3295-3301. https://doi.org/10.3892/etm.2018.5826
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