title: Increased nitric oxide in peritoneal fluid from women with idiopathic infertility and endometriosis.
abstract: OBJECTIVE
  To verify whether nitric oxide in peritoneal fluid is associated with endometriosis and infertility.
  
  
  METHODS
  Twenty-five women with idiopathic infertility and 38 with endometriosis were recruited, and 18 cases of uterine myomata and 2 cases of ovarian cyst served as controls. Peritoneal fluid samples were aspirated from the pouch of Douglas during laparoscopy or laparotomy. Metabolites of nitric oxide (nitrite and nitrate) in peritoneal fluid were determined by a method using nitrate reductase and the Griess reaction.
  
  
  RESULTS
  Peritoneal concentrations of nitrate/nitrite in both infertile women (42.02 +/- 12.98 mmol/L) and patients with endometriosis (41.75 +/- 16.42 mmol/L) were significantly higher than that in controls (33.96 +/- 13.07, P < .05 for both). No significant difference in peritoneal nitrate/nitrite level was found between infertile women and patients with endometriosis (P > .5). Peritoneal levels of nitrate/nitrite were comparable among patients with endometriosis at different stages (P > .5). Patients with endometriosis had more peritoneal fluid than controls and idiopathic infertile women, while controls and idiopathic infertile women had comparable amounts of peritoneal fluid.
  
  
  CONCLUSIONS
  An increased peritoneal level of nitric oxide is a common alteration in endometriosis, endometriosis-associated infertility and idiopathic infertility and may be associated with the pathogenesis of these diseases.
authors.affiliation: Women's Hospital, School of Medicine, Zhejiang University, 2 Xueshi Road, Hangzhou, Zhejiang 310006, P.R.C. mydong@mail.hz.zj.cn
authors.forename: M
authors.initials: M
authors.lastname: Dong
authors.forename: Y
authors.initials: Y
authors.lastname: Shi
authors.forename: Q
authors.initials: Q
authors.lastname: Cheng
authors.forename: M
authors.initials: M
authors.lastname: Hao
mesh_terms: D000328:Adult; D001202:Ascitic Fluid / Q000737:chemistry*; D015415:Biomarkers / Q000032:analysis; D004715:Endometriosis / Q000473:pathology*; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000473:pathology*; D009569:Nitric Oxide / Q000097:blood*
chemical_list: D015415:Biomarkers; D009569:Nitric Oxide