涎腺腺样囊性癌中NOS和VEGF的表达与血管生成及临床病理因素的关系

目的：研究血管内皮生长因子（vascular endothelial growth factor,VEGF）、诱导型一氧化氮合酶（induciblenitric oxide synthase,iNOS）和内皮型一氧化氮合酶（endothelial nitric oxide synthase,eNOS）在涎腺腺样囊性癌（salivaryadenoid cystic carcinoma,SACC）中表达的相关性;探讨三者与SACC血管生成和临床病理特征的关系;研究一氧化氮（nitric oxide,NO）和VEGF的相互作用及NO在VEGF促肿瘤生长中的作用机制。方法：应用免疫组织化学方法检测32例SACC手术切除标本VEGF、iNOS和eNOS的表达,CD34血管内皮细胞特异性染色计数肿瘤微血管密度（microvesseldensity,MVD）。结果：①20例SACC组织表达VEGF,22例表达iNOS,25例表达eNOS;②VEGF与iNOS的表达正相关,与eNOS的表达无相关;③VEGF、iNOS的表达与涎腺腺样囊性癌MVD呈正相关,eNOS的表达与涎腺腺样囊性癌MVD的差异无显著性意义;④VEGF的表达与SACC病理类型、淋巴结转移、肿瘤部位及临床分期密切相关;iNOS的表达与病理类型、肿瘤部位及临床分期密切相关;与淋巴结转移未见相关。eNOS表达与以上因素均无关。结论：①iNOS对VEGF的生成和发挥作用的过程有重要影响;②MVD随着VEGF和iNOS表达的增强而增加,说明两者对SACC血管生成具有促进作用.

Expression of VEGF and NOS in Salivary adenoid cystic carcinoma and its relation to angiogenesis and clinical pathology

Objective:To study the relation of protein expression of inducible nitric oxide synthase(iNOS),endothelial nitric oxide synthase(eNOS) and vascular endothelial growth factor(VECF)in salivary adenoid cystic carcinoma(SACC)and its relation to clinical pathology and angiogenesis.Method:SACC tissue specimens were obtained from 32 patients undergoing operation,by using the immunohistochemisry technique,the expression of iNOS,eNOS and VEGF were studied.Microvessel density(MVD) was counted by endothelial cell immu...