缺氧诱导因子-1α和血管内皮生长因子在肾细胞癌组织中的表达及意义

目的检测缺氧诱导因子-1α（HIF-1α）和血管内皮生长因子（VEGF）在肾细胞癌中的表达及其相互关系。方法用免疫组织化学SABC法检测42例肾细胞癌组织中HIF-1α及VEGF蛋白的表达。结果肾细胞癌组织中HIF-1α阳性表达率为57．1％，癌旁及正常组织不表达；肾细胞癌VEGF阳性表达率为61．9％，与癌旁及正常组织（阳性表达率为20％）相比有显著性差异（P〈0．05）；癌转移患者与无癌转移者HIF-1α、VEGF比较均有显著性差异（P〈0．01）；HIF-1α与VEGF表达呈正相关（Kappa=0．41,P〈0．01）。结论HIF-1α在肾细胞癌组织中呈高表达，其与VEGF有相关性，有望成为判断肾细胞癌转移和预后等生物学行为的重要参考指标，HIF-1α是VEGF表达的调控因子之一。

Expressions of hypoxia inducible factor-1alpha and vascular endothelial growth factor in human renal cell carcinoma]

OBJECTIVE: To explore the expression of hypoxia inducible factor-1alpha (HIF-1alpha) and vascular endothelial growth factor (VEGF) in renal cell carcinoma (RCC) and their relationship. METHODS: The expression of HIF-1alphaand VEGF was examined in 42 patients with renal cell carcinoma by SABC methods of immunohistochemistry. RESULTS: The positivity rate of HIF-1alpha was 57.1% in the RCC tissues, and there was no expression in the tissue adjacent to the tumor and normal tissues. The positivity rate of VEGF was 61.9% in the tumor tissues, with significant difference from the control tissues (P<0.05). The expression levels of HIF-1alpha and VEGF were significantly higher in metastatic RCC than in non-metastatic RCC (P<0.01) tissues, and there was a significant correlation between HIF-1alpha and VEGF expressions (Kappa=0.41, P<0.01). CONCLUSIONS: HIF-1alpha is highly expressed in renal cell carcinoma tissues in close correlation with VEGF. HIF-1alpha and VEGF may serve as important indicators to evaluate the biological behaviors of RCC such as metastasis and prognosis. HIF-1alpha is an important regulator of VEGF.