环加氧酶-2在人结直肠肿瘤中的表达及其临床意义

The expression of cyclooxygenase-2(COX-2) in human colorectal cancer and its clinical significance

目的 :探索环加氧酶 2 (cyclooxygenase 2 ,COX 2 )在人结直肠癌发生、发展过程中的地位。 方法 :应用免疫组化法检测 1 2 2例 (结直肠腺瘤 35例 ,结直肠癌 64例 ,结直肠癌伴同时性肝转移 2 3例 )组织标本中COX 2的表达 ,采用形态定量法分析 ,计算每张切片的平均COX 2染色强度。结果 :结直肠腺瘤组的COX 2平均染色强度为 70 4 .5± 1 31 .8,结直肠癌组为 1 1 97.2± 2 0 4 .3 ,结直肠癌伴肝转移组为 1 90 1 .2± 32 4 .8,三组之间有统计学差异(P <0 .0 1 )。按Dukes分期来分 ,B期 1 1 4 5 .3± 1 87.0 ,C期 1 2 37.0± 2 98.7,D期 1 90 1 .2± 32 4 .8,D期显著高于B、C期 (P <0 .0 1 )。结直肠肿瘤COX 2的表达与性别、年龄、肿瘤部位、肿瘤大小无关。结论 :COX 2在结直肠腺癌组织中的表达远高于腺瘤组织 (P <0 .0 1 ) ;伴同时性肝转移的结直肠腺癌组织显著高于无肝转移者 (P <0 .0 1 ) ;DukesD期者显著高于B、C期 (P <0 .0 1 )。因此 ,COX 2在结直肠癌发生、发展过程中起着重要的作用 ,非甾体类抗炎药或其他新型药物作为COX

Purpose:To evaluate the role of COX 2 in the carcinogenesis and progression of human colorectal neoplasms. Methods:The expression level of COX 2 in 122 colorectal neoplasm tissues(including 35 colorectal adenomas, 67 colorectal carcinoma and 23 colorectal cancer with synchoronous hepatic metastasis) was assayed by immunohistochemical methods. All specimens was analyzed by Conformation quantitative assay system, their stain strength was calculated.Results:Conformation quantitative assay showed the mean stain strength is 704.5 131.8 in colorectal adenoma, 1197.2 204.3 in colorectal cancer without hepatic metastasis and 1901.2 324.8 in colorectal cancer with synchoronous hepatic metastasis, there are significant differences among them statistically. According to the Dukes stages, mean stain strength is 1145.3 187.0 in B stage,1237.0±298.7 in C stage,1901.2 in D stage. There is statistic difference between Dukes stage D and B, C. Also our study indicated there was no relationship between age, sex, tumor location, tumor differentiation or tumor size with the level of COX 2 protein expression.Conclusions:In our test,higher COX 2 expression is seen in colorectal cancer than colorectal adenomas, colorectal cancer with synchoronous hepatic metastasis than colorectal cancer without hepatic metastasis,and Dukes D stage than the B?C. Thus COX 2 responses is important in the carcinogenesis and progression of colorectal cancer. NSAIDs or the others may play a role in the chemoprevention strategies of colorectal neoplasm as the COX 2 inhibitor.