血管内皮细胞生长因子与增殖细胞核抗原联合检测用于大肠癌临床预后判定

目的　探讨大肠癌血管内皮细胞生长因子 (VEGF)及增殖细胞核抗原 (PCNA)与大肠癌术后有无潜在性转移及复发的关系。方法　对 5 9例已获确诊的大肠癌石蜡标本作免疫组化SP法染色 ,检测其VEGF及PCNA的表达 ,并与 12例正常大肠组织和 16例大肠腺瘤进行比较。结果　大肠癌VEGF的表达明显高于大肠腺瘤 (P<0 .0 5 ) ;DukesA +B期大肠癌VEGF的表达与DukesC +D期比较 ,差异有显著性 (P<0 .0 5 ) ;术后复发组VEGF的表达明显高于无复发组 (P<0 .0 5 )。增殖活性表达提示 ,大肠癌分化程度越低 ,有淋巴结或肝转移时 ,其PCNA指数增高 ;术后有、无复发者之间 ,其PCNA指数差异有显著性 (P<0 .0 5 )。结论　大肠癌VEGF与PCNA的表达与肿瘤的浸润、转移密切相关。手术时虽然无明显转移灶 ,VEGF阳性及PCNA活性增强时仍可能有潜在的转移存在。

The Expression of Vascular Endothelial Growth Factor and Proliferating Cell Nuclear Antigen and Its Clinical Significance in Colorectal Cancer

Objective To investigate the expression of vascular endothelial growth factor (VEGF) and proliferating cell nuclear antigen (PCNA) in colorectal cancer and its relationship with metastasis and recurrence. Methods Paraffin-embedded specimens from 59 patients with colorectal cancer, 16 patients with adenomas and 12 normal colonic tissues were examined and compared by SP immunohistochemical method. Results The positive rate of VEGF in colorectal cancer were significantly higher than that in adenomas ( P <0.05). The positive rate of VEGF in Dukes A and B stage of colorectal cancer were significantly higher than those in Dukes C and D ( P <0.05). Expression of VEGF in postoperative recurrence group was markedly higher than that in the group with no recurrence ( P <0.05). Proliferative activity expression suggested that the poorer the differentiation, the more PCNA increased in case of lymphnode or hepatic metastasis. The PCNA showed marked difference between postoperative and non-postoperative recurrences ( P <0.05). Conclusion The expression of VEGF and PCNA is closely related to the invasion and metastasis of tumor during the operation. The increased VEGF and high PCNA implies that there may be some potential metastasis present.