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Expression of E-cadherin in gastric carcinoma and its correlation with lymph node micrometastasis

查看全文 作　　者：Ze-[1]YuWu;Wen-[1]HuaZhan;Jing-[2]HuaLi;Yu-[1]LongHe;Jian-[1]PingWang;[1]PingLan;Jun-[1]ShengPeng;Shi-[1]RongCai 高影响力作者 机构地区：[1]DepartmentofGastrointestinalandPancreaticSurgery,theFirstAffiliatedHospital,SunYat-SenUniversity,Guangzhou510080,GuangdongProvince,China;[2]DepartmentofParasitology,ZhongShanMedicalCollege,SunYat-SenUniversity,Guangzhou510089,GuangdongProvince,China高影响力机构 出　　处：《World Journal of Gastroenterology》索引2005年第11卷第20期,共5页高影响力期刊 基　　金：Supported by the National Natural Science Foundation of China,No. 30271276 摘　　要：AIM: To examine the expression of E-cadherin in the primary tumor and to evaluate its relationship with lymph node micrometastasis (LNM).METHODS: The authors studied 850 lymph nodes resected from 30 patients with gastric carcinoma who underwent gastrectomy with lymphadenectomy using reverse transcription polymerase chain reaction (RT-PCR) assay in addition to H&E staining. Cytokeratin-20 (CK-20)gene marker was used in this assay. The level of E-cadherin expression in the primary tumor was examined by immunochemical technique (EliVisionTM plus).RESULTS: LNM was detected in 77 (12.5%) lymph nodes of 14 patients (46.7%) with gastric carcinoma. The incidence of LNM was significantly higher in the diffuse type (12 of 19 cases, 63.2%) than in the intestinal type of gastric carcinoma (2 of 11 cases, 18.2%, P = 0.026). The incidence of LNM also increased in accordance with the depth of tumor invasion. The loss of expression of E cadherin in primary tumors was found in 14 (46.7) of 30 tumors. The absence of E-cadherin expression was significantly associated with the Lauren classification (P = 0.026), lymph node metastasis (P = 0.011), the grade of differentiation (P = 0.004) and the lymphatic invasion (P = 0.001). Expression of E-cadherin was negative in 10 (71.4%) of the 14 patients with LNM, and in 4 (25%) of the 16 patients without LNM (P = 0.026). CONCLUSION: The current results indicate that the RT PCR assay is useful for the detection of LNM and can significantly increase the detection rate of lymph node metastasis in patients with gastric carcinoma. The Laurenclassification and depth of tumor invasion are significantlyassociated with lymph node micrometastases. Our findings also indicate that E-cadherin may play an important role in determining the growth type and differentiation of gastric carcinoma. The loss of E-cadherin expression may contribute to LNM. 关 键 词：E-钙粘素 胃癌 淋巴结 肿瘤转移
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