Survivin、VEGF的表达及微血管密度与非小细胞肺癌临床病理特征的关系

Microvessel Density and Expressions of Survivin and Vascular Endothelial Growth Factor in Non-small Cell Lung Cancer and Their Correlations to Clinicopathologic Features

背景与目的研究发现,Survivin在大多数肿瘤中有表达,但在成人组织不表达或低表达,且参与肿瘤血管形成。本研究中我们主要检测非小细胞肺癌(non鄄smallcelllungcancer,NSCLC)、癌旁及肺良性病变组织中凋亡抑制基因Survivin及血管内皮生长因子(vascularendothelialgrowthfactor,VEGF)的表达和微血管密度(microvesseldensity,MVD)值,并探讨三者间的相互关系。方法应用免疫组化(S鄄P)法检测96例NSCLC组织中Survivin、VEGF及MVD。分析Survivin、VEGF及MVD与NSCLC临床病理特征的关系,以及Survivin、VEGF、MVD间的相互关系。结果NSCLC组织中Survivin阳性率69.8%(67/96),明显高于癌旁(16.1%)和肺良性病变组织(0%)(P<0.01),其表达与肿瘤分化程度、TNM分期有关。VEGF在肺癌、癌旁、肺良性病变组织中的阳性率分别为72.9%(70/96)、45.2%(14/31)和25.0%(5/20)(P<0.05),其表达与肿瘤的TNM分期及淋巴结转移有关。肺癌、癌旁、肺良性病变组织中MVD值分别为24.44±7.79、19.37±5.26、11.83±6.25,且MVD值的高低与肿瘤大小、淋巴结转移和TNM分期有关(P<0.05)。Survivin在肺癌组织中的表达与VEGF、MVD密切相关,随着Survivin强度的增加VEGF分级及MVD值亦增加。结论不同性质的肺病变组织中Survivin、VEGF的表达水平和MVD值不同,NSCLC中Survivin表达明显增高,其表达与肿瘤分化、分期有关;Survivin的过度表达与NSCLC的血管生成有关,细胞凋亡与血管生成在肺癌的发生发展中起协调作用。

BACKGROUND & OBJECTIVE: Survivin, an anti-apoptosis gene, expresses in most tumors, and takes part in tumor angiogenesis. This study was to investigate microvessel density (MVD) and expressions of Survivin and vascular endothelial growth factor (VEGF) in non-small cell lung cancer (NSCLC), and explore their correlations to clinicopathologic features of NSCLC. METHODS: MVD and expressions of Survivin and VEGF in 96 specimens of NSCLC tissues, 31 specimens of tumor adjacent tissues, and 20 specimens of benign lesions were detected by SP immunohistochemistry; their interrelations and correlations to clinicopathologic features of NSCLC were analyzed. RESULTS: Positive rate of Survivin was significantly higher in NSCLC than in adjacent tissues and benign lesions (69.8% vs. 16.1% and 0, P<0.05); its expression was related with differentiation and TNM stage of NSCLC. Positive rate of VEGF was significantly higher in NSCLC than in adjacent tissues and benign lesions (72.9% vs. 45.2% and 25.0%, P<0.05); its expression was related with lymph node metastasis and TNM stage of NSCLC. MVD was significantly higher in NSCLC than in adjacent tissues and benign lesions (24.44±7.79 vs. 19.37±5.26 and 11.83±6.25, P<0.05), and was related with lymph node metastasis and TNM stage of NSCLC. Survivin expression was positively correlated with VEGF expression and MVD. CONCLUSION: Survivin is overexpressed in NSCLC, which relates with differentiation and TNM stage of NSCLC and takes part in angiogenesis.