胃癌c-Jun 和MMP-9 表达与其生物学行为的关系*

目的:研究转录因子c-Jun 及下游蛋白MMP-9 在胃癌组织中的表达状况，分析其与临床病理特征和生存之间的关系。方法:应用免疫组化SP法，采用组织芯片技术，分析189 例胃癌组织、54例癌旁组织、41例淋巴结转移灶及32例正常对照组织中c-Jun 和MMP-9 蛋白表达。结果:胃癌中c-Jun 和MMP-9 蛋白的阳性表达率分别为73.0% 和78.3% 。c-Jun 蛋白的表达与分化程度有关（P<0.05）；MMP-9 的表达与浸润深度、淋巴结转移、分化程度及Lauren 分型有关（P<0.05）。 胃癌中c-Jun 和MMP-9 蛋白表达水平呈正相关（P<0.05）。 41例淋巴结转移灶和相对应的41例胃癌组织各因子表达比较发现，MMP-9 阳性表达率有显著性差异（P<0.05），c-Jun 阳性表达率无显著性差异（P>0.05）。 单因素生存分析显示c-Jun 和MMP-9 阳性组对胃癌患者生存期的影响有统计学意义（P<0.05），COX
多元回归分析显示c-Jun 和MMP-9 的异常表达均不可作为影响胃癌预后的独立因素（P>0.05）。 结论:c-Jun 和MMP-9 在胃癌组织中均有高表达。c-Jun 阳性表达与胃癌的组织学分级密切相关，提示其异常表达可能是胃癌发生过程中的一个早期分子事件。MMP-9 阳性表达与肿瘤的浸润、转移密切相关，可作为判断胃癌恶性行为的重要生物学标记物。c-Jun 和MMP-9 蛋白表达水平呈正相关。c-Jun 和MMP-9 蛋白阳性表达对于胃癌患者是一个不利的预后因素，尚不能作为一个独立的预后指标。 

The Expression of c-Jun and MMP-9 in Gastric Carcinoma and Its Relationship with the Biological Behaviors

Objective:To investigate the expression of c-Jun and MMP-9 in gastric cancer tissues,para-cancerous tissues and metastastic lymph nodes,and to explore its role and significance for the clinicopathology and prognosis.Methods:Immunohistochemistry was employed to detect the expression of c-Jun and MMP-9 in tissue microarrays containing gastric normal mucosa(n=32),para-cancerous tissues(n=54),metastastic lymph nodes(n=41),and gastric cancer tissues(n=189).Results:The positive rates for c-Jun and MMP-9 expression in gastric cancer were 73.0%and 78.3%,respectively.The positive rates of c-Jun protein was significantly associated with the degree of differentiation(P<0.05),but was not associated with the depth of invasion,lymph node metastasis,Lauren type,sex,age or size of tumor(P>0.05).The positive rates of MMP-9 was significantly associated with the depth of invasion,lymph node metastasis,Lauren type and degree of differentiation(P<0.05),but was not associated with sex,age or size of tumor(P>0.05).The positive rates of MMP-9 expression in the 41 gastnc cancer tissue samples and 41 metastastic lymph node tissue samples were significantly different(P<0.05).In metastastic lymph nodes,the positive rate of MMP-9 expression was higher.Kaplan-Meier survival analysis showed that the survival rate of patients with negative c-Jun and MMP-9 expression was higher than that of patients with positive c-Jun and MMP-9 expression(P<0.05).COX regression analysis showed that c-Jun and MMP-9 expressioh was not independent prognostic factor for gastric cancer. Conclusion:The expression of c-Jun is positively associated with the degree of differentiation.The increased c-Jun expression maybe an early indicator of gastric Cancer. The high expression of MMP-9 may involve the Occurrence,development,invasion,and metastasis of gastric cancer. C-Jun and MMP-9 are useful markers for predicting the outcome of gastric cancer,but they are not independent prognostic factors.