title: [The study of nitric oxide synthase in ovary tumor].
abstract: 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.
  
  
  CONCLUSIONS
  Increase in nitric oxide synthase activity might be related to the growth and malignant behavior of ovarian cancer.
authors.affiliation: Department of Gynecology, First Clinical College, China Medical University, Shenyang 110001, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Wu
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: H
authors.initials: H
authors.lastname: Song
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002462:Cell Membrane / Q000201:enzymology; D003593:Cytoplasm / Q000201:enzymology; D005260:Female; D006801:Humans; D008875:Middle Aged; D019001:Nitric Oxide Synthase / Q000378:metabolism*; D010051:Ovarian Neoplasms / Q000201:enzymology*; D013799:Theca Cells / Q000201:enzymology*
chemical_list: D019001:Nitric Oxide Synthase