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High CD133 expression in the nucleus and cytoplasm predicts poor prognosis in non-small cell lung cancer
Minjie Huang1, Huijun Zhu2, Jian Feng1
1Department of Respiratory Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, China.
Objective:
The aim of this study was to investigate the expression of Prominin-1 (CD133) in cancer cells and its potential value as a prognostic indicator of survival in patients with non-small cell lung cancer (NSCLC).
Methods:
Cancerous tissues and matched normal tissues adjacent to the carcinoma from 239 NSCLC patients were obtained immediately after surgery. Immunohistochemistry of tissue microarrays was used to characterize the expression of CD133 in NSCLC and adjacent tissues. The correlation of CD133 expression with clinical characteristics and prognosis was determined by statistical analysis.
Results:
CD133 protein expression levels in both the cytoplasm and nucleus were significantly higher in NSCLC tissues compared with corresponding peritumoral tissue (P < 0.05). CD133 expression in the nucleus of NSCLC cells was related to tumor diameter (P = 0.027), tumor differentiation (P < 0.001), and TNM stage (P = 0.007). Kaplan-Meier survival and Cox regression analyses revealed that high CD133 expression in the nucleus was an independent predictor of poor prognosis of NSCLC, as was high cytoplasmic CD133 expression (P < 0.001).
Conclusion:
Our findings provide the first evidence that high expression of CD133 in both the nucleus and cytoplasm is associated with poor prognosis in NSCLC.
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