Abstract
This study was designed to investigate the association of HAb18G/CD147 expression and localization with clinicopathological parameters and prognosis in NSCLC. Two hundred and eight (208) specimens of surgically resected NSCLC were stained by immunohistochemistry utilizing mouse anti-human HAb18G/CD147 monoclonal antibody. High levels of HAb18G/CD147 expression were associated with male gender, smoking history, tumor position, distant metastasis status, and clinical stage (p<0.05) in squamous cell carcinoma. In adenocarcinomas, HAb18G/CD147 expression was associated with male gender, tumor diameter, differentiation, lymph node status, distant metastasis status, and clinical stage (p<0.05). HAb18G/CD147 expression with higher PU was predominantly localized in the tumor cell membranes rather than in cytoplasms. In squamous cell carcinomas, membranous localization of HAb18G/CD147 was linked to distant metastasis status and TNM stage (p<0.05). Cytoplasmic localization of HAb18G/CD147 was associated with male gender and smoking history. In adenocarcinomas, membranous localization of HAb18G/CD147 correlated with tumor diameter, differentiation and distant metastasis (p<0.05). Univariate analysis indicated that patients with high HAb18G/CD147 expression and membranous localization predicted poor prognosis in both squamous cell carcinomas and adenocarcinomas. Multivariate analysis showed that lymph node status (HR=1.762, 95%CI 1.105–2.811, p=0.017), distant metastasis status (HR=3.789, 95%CI 2.196–6.539, p=0.000), expression (HR=6.632, 95%CI 2.457–17.904, p=0.000), and localization (HR=0.520, 95%CI 0.341–0.794, p=0.002) were good or excellent independent predictors of patient survival. HAb18G/CD147 is a biomarker characterizing progression and survival of NSCLC. More importantly, its cellular localizations should be considered in the analysis of clinicopathological characteristics and prognostic factors in NSCLC.
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