RECK和基质金属蛋白酶9及血管内皮生长因子C在结直肠癌中的表达及意义

目的 探讨RECK、基质金属蛋白酶9（MMP-9）及血管内皮生长因子C（VEGF-C）在结直肠癌中的表达及意义.方法 选取经病理证实为结直肠癌的手术切除石腊标本60例,取距癌组织至少10 cm的近端切缘组织30例,作为癌旁对照.采用免疫组织化学方法检测RECK、MMP-9及VEGF-C的表达,并分析其与结直肠癌临床病理特征的关系.结果 本组结直肠癌与癌旁组织中RECK阳性表达率分别为53.3%（32/60）和100%（30/30）,MMP-9阳性表达率分别为86.7%（52/60）和23.3%（7/30）,VEGF-C阳性表达率分别为71.7%（43/60）13.3%（4/30）;差异均有统计学意义（均P＜0.01）.结直肠癌组织中RECK与MMP-9和VEGF-C表达呈负相关,MMP-9与VEGF-C的表达呈正相关（均P＜0.05）;三者的表达均与结直肠癌淋巴结转移、远处转移及TNM分期有关（均P＜0.05）.结论 结直肠癌组织中RECK呈低表达,而MMP-9和VEGF-C呈高表达,联合检测这3个指标对于评估结直肠癌浸润转移及判断病情、监测预后有重要意义.

Expression and significance of RECK, metalloproteinase-9 and vascular endothelial growth factor-C in colorectal cancer

Objective To investigate the expression of reversion-inducing cysteine-rich protein with Kazal motifs(RECK), matrix metalloproteinase-9(MMP-9), and vascular endothelial growth factor-C(VEGF-C) in colorectal cancer. Methods S-P immunohistochemistry was used to detect the expression of RECK, MMP-9 and VEGF-C in colorectal cancer specimen. Colorectal mucosal tissue at least 10 cm away from the tumor was used as control. Results The positive expression of RECK in colorectal cancer was significantly lower than that in the controls(53.3% vs. 100%,P＜0.05). Both MMP-9 and VEGF-C were over expressed compared with the controls(86.7% vs. 23.3% and 71.7% vs. 13.3% respectively,P＜0.01). The expression of RECK was negatively correlated with that of MMP-9 and VEGF-C, and the expression of MMP-9 was positively correlated with that of VEGF-C. There were significant associations between the expression of these proteins and lymph node metastasis, distant metastasis, and TNM staging(all P＜0.05). Conclusions RECK expression is low in colorectal cancer, while MMP-9 and VEGF-C expressions are high. Combined testing of these 3 markers is important in the evaluation of tumor metastasis and invasion, and is helpful in the prediction of the prognosis.