抑癌基因DPC4蛋白在食管癌中的表达及其意义

    Expression of DPC4 gene in esophageal carcinoma and its significance

    • 摘要: 目的:探讨DPC4与血管内皮细胞生长因子(VEGF)表达与食管癌生物学行为的关系。方法:应用免疫组化S-P法检测174例食管癌组织抑癌基因DPC4与VEGF蛋白的表达。结果:DPC4在癌旁正常食管黏膜和食管癌中的阳性表达率分别为80.0%和40.8%(P<0.005),食管腺癌中DPC4的阳性率高于食管鳞癌(P<0.05)。随着分化程度的降低,DPC4的阳性表达率呈下降趋势,但差异无统计学意义(P>0.05);有淋巴结转移的食管癌组DPC4阳性率显著低于无淋巴结转移组(P<0.005);而VEGF在癌旁正常食管黏膜和食管癌中阳性表达率分别为23.3%和43.1%(P<0.05);随着分化程度的降低,其阳性表达率呈明显上升,有淋巴结转移组的阳性率显著高于无淋巴结转移组(P<0.005)。DPC4和VEGF两者呈明显的负相关关系(P<0.001)。结论:DPC4的低表达是食管癌发生的一个重要原因;DPC4的低表达可能与促进食管癌血管的生成和淋巴结转移有关。

       

      Abstract: Objective: To investigate the correlationship between the expressions of DPC4 and vascular endothelial growth factor(VEGF) in esophageal carcinoma and their clinicopathological behavior.Methods: The expressions of DPC4 and VEGF proteins were examined by immunohistochemical method in 174 cases of esophageal carcinoma tissues.Results: The positive rates of DPC4 in normal esophageal mucosa.and esophageal carcinoma were 80% and 40.8%,respectively(P<0.005).The expression of DPC4 was higher in adenocarcinomas than in squamous carcinomas(P<0.05).With the depression of differentiation,the positive rate of DPC4 descended,but was not significant(P>0.05).The DPC4 expression of the group with lymph node metastasis was lower than the group without that(P<0.005).But the positive rates of VEGF in normal esophageal mucosa.and esophageal carcinoma were 23.3% and 43.1%,respectively(P<0.005).With the depression of differentiation,the positive rate of VEGF ascend.The VEGF expression of the group with lymph node metastasis was higher than the group without that(P<0.05).The expression of DPC4 was nagtive correlated with the expression of VEGF(P<0.001).Conclusions: The low expression of DPC4 is an important factor of esophageal carcinoma occurrence;The low expression of DPC4 may accelerate creating blood vessels and lymph node metastasis of esophageal carcinoma.

       

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