卵巢肿瘤一氧化氮合酶的活性研究

The study of nitric oxide synthase in ovary tumor

目的 探讨一氧化氮合酶 (nitricoxidesynthase ,NOS)与卵巢肿瘤间的关系 ,并观察其在卵巢肿瘤组织中的分布。方法 NOS的比活性用分光光度法 ,NOS在组织中的分布用NADPH 黄递酶组化染色法。结果 (1)卵巢恶性肿瘤组织中NOS活性较正常卵巢组织和卵巢良性肿瘤组织显著增高 (P <0 0 1)。 (2 )卵巢良性肿瘤和正常卵巢组织中NOS含量差异无显著性 (P >0 0 5 )。 (3)NOS活性随卵巢恶性肿瘤组织分化程度降低而增高 (P <0 0 1)。 (4)恶性肿瘤患者血清中NOS活性高于正常对照。 (5 )在卵巢恶性肿瘤组织中NADPH 黄递酶染色呈阳性 ,而间质呈阴性 ;癌组织中染色深度高于正常卵巢及卵巢良性肿瘤组织 (P <0 0 1)。 (6 )NOS主要分布于癌细胞的胞膜和胞浆 ,胞核基本不着色。结论 一氧化氮 (nitricoxide,NO)合成的增多 ,可能与卵巢恶性肿瘤生长及恶性行为有关 ,卵巢恶性肿瘤组织中NOS含量增高是NO合成增多的重要原因之一。

Objective To study the activity of nitric oxide synthase (NOS) in ovarian tumors.Methods Spectrophotometry was used to examine NOS activity and NADPH diaphorase histochemistry to identify its localization. Results The activity of NOS was significantly higher in malignant than in normal ovarian tissue and benign ovarian tumors ( P <0.01). There was negative correlation between NOS activity and tumor cell differentiation. NOS reaction product was mainly located in cancer cells, and was negative in the interstitial tissue. Furthermore, NOS was mostly located in membrane and cytoplasm of the cancer cell.Conclusion Increase in nitric oxide synthase activity might be related to the growth and malignant behavior of ovarian cancer.