目的:探讨CDw75(cluster of differentiation antigen 75)在大肠癌组织中的表达及其和大肠癌浸润、转移和TNM分期等病理特征之间的关系。方法:采用免疫组化SP法检测CDw75抗原在61例大肠癌组织和30例相应正常大肠黏膜组织中的表达,计算阳性细胞的百分率。结果:CDw75在30例正常大肠黏膜中均阴性表达,在61例大肠癌组织中有30例阳性表达。CDw75表达阳性多见于肿瘤直径≥5cm、浸润深度较深、伴淋巴结转移和远处转移及TNMⅢ+Ⅳ期的大肠癌。结论:大肠癌组织中CDw75抗原的表达可作为大肠黏膜恶性转化的一个标志物,并可能用于判断大肠癌的恶性生物学行为。
AIM: TO study the expression of CDw75 in patients with gastric carcinoma and to correlate CDw75 expression with progression of the tumor. METHODS: Immunohistochemical method was used to examine the expression of CDw75 in 72 cases of the gastric carcinoma and adjacent normal gastric mucosa, and the percentage of the cells positively stained with CDw75 was calculated using a computer-aided microscopic image analysis system. RESULTS: CDw75 was not expressed in normal gastric mucosa but detected in 37 of the 72 neoplastic gastric lesions. The expression of CDw75 was associated with the tumor progression as indicated by its close correlation with the depth of the tumor infiltration (X^2=18.415, P<0.01), TNM stage (X^2=10.419, P<0.05) and lymph node metastasis (X^2=6.675, P<0.01). The overall survival rate of the patients with positive CDw75 expression (32.4%) was significantly lower than that of the patients without CDw75 expression (71.4%) (P<0.01). There was no significant correlation between the expression of CDw75 and the sex and age and histological type of patients (P>0.05). CONCLUSION: These findings suggest that the expression of CDw75 is a significant histopathological marker for more advanced stage of gastric carcinoma and indicates a poor prognosis for the patients.
