VEGF-C和COX-2与结肠癌发病及淋巴结转移的关系

目的 探讨VEGF-C和COX-2与结肠癌发病及淋巴结转移的关系.方法 选择62例结肠癌(肠癌组)、22例结肠腺瘤(腺瘤组)和22例正常结肠黏膜(正常组)标本,采用原位分子杂交法检测环氧化酶2(COX-2)mRNA,以MaxVisionTM快捷免疫组化法检测血管内皮生长因子C(VEGF-C)及血管内皮细胞表面抗原(CD34)表达,光镜下记录微血管计数(MVD).结果 VEGF-C在肠癌组的阳性率为74.19%(46/62)明显高于腺瘤组(36.36%、8/22)和正常组(36.36%、8/22)(P<0.01).VEGF-C表达阳性者中高表达占82.61%,随着肿瘤体积的增大、组织分化程度的降低阳性表达率也有升高,淋巴结有转移组表达阳性率略高于无转移组.COX-2 mRNA在肠癌组、腺瘤组的阳性表达率明显高于正常组(74.19%vs.36.36%,P<0.01;72.73%vs.36.36%,P<0.05);COX-2 mRNA在高分化组阳性率高于低分化组(P<0.05);VEGF-C和COX-2的表达呈正相关(P<0.01);肠癌组平均MVD值明显高于腺瘤组和正常组(P<0.01).进展期癌组的MVD高于早期癌组(P<0.01);淋巴结有转移组MVD高于无转移组(P<0.01);有血管侵犯组高于无血管侵犯组(P<0.05).结论 COX-2通过上调VEGF-C的表达在结肠癌肿瘤血管形成及淋巴结转移中起促进作用.

The correlation between VEGF-C and COX-2 mRNA expression in colon carcinoma and its role in metastasis

Objective To study the expressions of vascular endotheliol growth factor C(VEGF-C), cyclooxygenase-2(COX-2) mRNA and microvessel density (MVD) in colon carcinoma and their significance in the angiogenesis, lymph node metastasis and clinical pathologic characteristics. Methods Expression of COX-2 mRNA was evaluated by in situ hybridization method and that of VEGF-C and CD34 was detected immunohistochemically by MaxvisionTM method in 62 cases of colon carcinoma, 22 cases of colon adenoma and 22 cases normal c...