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- W2061796256 abstract "Nasopharyngeal carcinoma (NPC) is predominantly of the undifferentiated histological subtype. Histological differentiation is of limited prognostic significance in NPC. Recent studies have suggested that downregulation of the cadherin-catenin cell adhesion complex may play a crucial role in the initial stage of cancer invasion and metastasis and is associated with poor prognosis in human cancers. Expression of E-cadherin has not been reported previously in NPC, and its prognostic value in NPC is unknown. The purpose of this study was to examine the expression pattern of E-cadherin and its associated partner, β-catenin, in NPC and their possible applications as prognostic markers to predict the clinical outcome of NPC. Expression of the E-cadherin and β-catenin was examined by immunohistochemical methods in 74 cases of primary NPC and 17 of their corresponding lymph node metastases. Normal nasopharyngeal epithelium showed strong and homogeneous immunocytochemical staining of E-cadherin and β-catenin at the cell membranes and intercellular junctions. In contrast, primary NPC showed variable and heterogeneous staining patterns of E-cadherin and β-catenin. Loss of membranous E-cadherin expression was significantly associated with advanced stages of diseases (P < .001). Eighty percent to ninety percent of NPC in stages IV and V (Ho's staging), respectively, showed a reduced (<35%) membranous staining of E-cadherin compared with normal nasopharyngeal epithelium. Expression of β-catenin also was downregulated in advanced NPC. Ninety percent to one hundred percent of NPC in stages IV and V (Ho's staging) expressed a reduction (<35%) of immunocytochemical staining of β-catenin. The expression pattern of β-catenin staining was strongly associated with the expression of E-cadherin (P < .001). Unlike E-cadherin, nuclear staining of β-catenin expression was observed in some of the primary NPC and lymph node metastasis. Reduced expression of E-cadherin and β-catenin expression was associated with a shorter survival of NPC patients (P < .001). In advanced NPC patients (stages IV and V), a significant difference in survival was observed in tumors with higher or lower levels of E-cadherin expression (P = .0224, log-rank test). These observations suggests that expression of E-cadherin and β-catenin may have prognostic values in NPC patients." @default.
- W2061796256 created "2016-06-24" @default.
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- W2061796256 date "1999-04-01" @default.
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- W2061796256 title "Downregulation and abnormal expression of E-cadherin and β-catenin in nasopharyngeal carcinoma: Close association with advanced disease stage and lymph node metastasis" @default.
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- W2061796256 doi "https://doi.org/10.1016/s0046-8177(99)90123-5" @default.
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