Expression of TrkB and BDNF is associated with poor prognosis in non-small cell lung cancer

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• 作者：Kyoko Okamura ; Taishi Harada ; Shuo Wang ; Kayo Ijichi ; Kazuto Furuyama ; Takaomi Koga ; Tatsuro Okamoto ; Koichi Takayama ; Tokujiro Yano ; Yoichi Nakanishi
• 关键词：TrkB ; BDNF ; Survival ; Prognosis ; Invasion ; Lung cancer
• 刊名：Lung Cancer
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：78
• 期：1
• 页码：100-106
• 全文大小：628 K

文摘

High expression levels of TrkB and BDNF are associated with aggressive malignant behavior in tumor cells and a poor prognosis in patients with various types of cancer. In this study, we aimed to identify the relationship between TrkB and BDNF expression and clinicopathological variables and prognosis in non-small cell lung cancer (NSCLC). We evaluated TrkB and BDNF expression in the tumor cells of 102 NSCLC patients by immunohistochemistry. Out of all clinicopathological factors examined, only vascular invasion was significantly correlated with TrkB (P = 0.010) and BDNF (P = 0.015) expression. TrkB-positive tumors had significantly worse disease-free survival (P = 0.0094) and overall survival (P = 0.0019) than TrkB-negative tumors, and TrkB expression was an independent prognostic factor for disease-free survival (HR 3.735, 95 % C.I. 1.560-11.068, P = 0.002) and overall survival (HR 4.335, 95 % C.I. 1.534-15.963, P = 0.004) in multivariate analysis. Finally, our analysis revealed that co-expression of TrkB and BDNF conferred poorer prognosis compared with overexpression of either protein alone. Our results indicate that expression of TrkB and BDNF is associated with poor prognosis in NSCLC patients.