VEGF-C、VEGFR-3和LYVE-1的表达在胃癌淋巴管生成及预后中的作用*

摘要

目的检测胃癌组织中血管内皮生长因子C（VEGF-C）、血管内皮细胞生长因子受体-3（VEGFR-3）及淋巴管透明质酸受体-1（LYVE-1）的表达，探讨这3种因子在胃癌淋巴管生成和预后中的作用。方法应用组织微阵列技术（TMA），通过免疫组化SP法检测125例胃癌组织标本、96例癌旁正常组织及20例胃良性病变中VEGF-C、VEGFR-3和LYVE-1的表达，并对Podoplanin标记的微淋巴管密度（LVD）进行检测。结果 VEGF-C、VEGFR-3和LYVE-1在胃癌组织中的阳性表达率分别为62.4%、56.0%和58.4%，高于癌旁正常组织中的10.4%、12.5%和9.4%及胃良性病变组织中的20.0%、30.0%和25.0%；胃癌组织中LVD在癌内和癌周的水平分别为2.98±0.81、4.22±1.09，高于癌旁正常组织中的1.82±0.63和胃良性病变组织中的0.89±0.45（均P＜0.05），且癌周LVD高于癌内LVD（P＜0.01）；VEGF-C、VEGFR-3和LYVE-1表达与LVD均呈正相关（均P＜0.01）；也是胃癌远处和淋巴结转移的危险因素，阴性表达者5年生存率明显高于阳性表达者（P＜0.05）。结论胃癌组织中存在VEGF-C、VEGFR-3和LYVE-1的高表达，是影响胃癌患者预后的危险因素，检测这3个指标可预测胃癌淋巴管生成和判断预后。%Objective To study the role of expressions of vascular endothelial growth factor C (VEGF-C), vascular endothelial growth factor receptor-3 (VEGFR-3) and lymphatic vessel hyaluronan receptor-1(LYVE-1) on the lymphangio-genesis and prognosis in gastric cancer. Methods The tissue microarray technology was used to detect the expressions of VEGF-C, VEGFR-3 and LYVE-1 in 125 gastric cancer specimens, 96 adjacent normal tissues and 20 benign gastric lesion samples. The lymphatic vessel density (LVD) marked by Podoplanin was detected as well. Results The positive rates of VEGF-C, VEGFR-3 and LYVE-1 in gastric cancer tissues were 62.4%, 56.0%and 58.4%, which were significantly higher than those in adjacent normal tissues (10.4%,12.5%and 9.4%) and benign gastric lesion tissues (20%, 30%and 25%, P<0.05). The LVD score was significantly higher in gastric intra-tumoral and peri-tumoral samples (2.98±0.81 and 4.22±1.09) than that in adjacent normal tissues or benign gastric lesion samples (1.82±0.63 or 0.89±0.45, P<0.01). The LVD score was significantly higher in peri-tumoral samples than that of intra-tumoral samples (P<0.01). There was a positive relationship between expression levels of VEGF-C,VEGFR-3 and LYVE-1 with LVD (P<0.05). The positive expressions of the three indexes were the risk factors of lymph node metastasis and distant metastasis (P<0.05). There was a significantly longer 5-year survival rate in patients with negative expression of the three indexes (P<0.05). Conclusion VEGF-C, VEGFR-3 and LYVE-1 proteins were positively highly expressed in gastric cancer tissues, which were risk factors affecting the progno-sis of gastric cancer. The expression levels of the three indexes can be used to predict the prognosis and lymphangiogenesis of gastric cancer.