Overexpression of Ku80 correlates with aggressive clinicopathological features and adverse prognosis in esophageal squamous cell carcinoma.

Abstract:

:Ku80, a subunit of the heterodymeric Ku protein, is clearly implicated in nonhomologous end joining DNA repair, chemoresistance and radioresistance in malignant tumors. In the present study, the clinicopathological significance of Ku80 in esophageal squamous cell carcinoma (ESCC) was investigated. The expression levels of Ku80 were determined by reverse transcription-quantitative polymerase chain reaction and immunohistochemistry in ESCC specimens and normal esophageal mucosa. The mRNA and protein levels of Ku80 were significantly higher in ESCC tissues than in normal esophageal mucosa, and were significantly associated with tumor differentiation, local invasion, lymph node metastasis and tumor-node-metastasis (TNM) stage. However, overexpression of Ku80 mRNA and protein levels were not significantly correlated with age, gender, tumor site or tumor size. Cox proportional hazards regression model demonstrated that tumor local invasion, lymph node metastasis, TNM stage and Ku80 mRNA and protein levels were independent risk factors indicating the overall survival of patients with ESCC. The present study demonstrated that aberrant Ku80 overexpression is observed in ESCC. In addition, high expression levels of Ku80 are associated with adverse clinicopathological features and unfavorable prognosis in ESCC patients.

journal_name

Oncol Lett

journal_title

Oncology letters

authors

Wang S,Wang Z,Yang YU,Shi MO,Sun Z

doi

10.3892/ol.2015.3635

subject

Has Abstract

pub_date

2015-11-01 00:00:00

pages

2705-2712

issue

5

eissn

1792-1074

issn

1792-1082

pii

OL-0-0-3635

journal_volume

10

pub_type

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