title: Nitric oxide in Henoch-Schönlein purpura.
abstract: OBJECTIVE
  To assess the value of nitric oxide (NO) production on the disease activity in children with Henoch-Sch6nlein purpura (HSP) by measuring serum nitrate levels and urinary nitrate excretion as an indicator for NO production.
  
  
  METHODS
  The study group consisted of 25 patients and 20 healthy children. We measured serum nitrate, urinary excretion of nitrate, and CRP levels in the acute phase and after remission.
  
  
  RESULTS
  Serum nitrate levels in the acute phase of the disease were found to be increased compared to the remission phase (28.67 +/- 10.3 mmol/l. 14.16 +/- 2.02 mmol/l) (p < 0.001) and the control group (13.15 +/- 2.28 mmol/l) (p < 0.001). Urinary nitrate excretion in the acute phase of the patients (15.32 +/- 9 mmol/mg) was increased compared to that in the remission phase (8.26 +/- 4.3 mmol/mg) (p = 0.016) and in the control group (7.24 +/- 4.9 mmol/mg) (p < 0.01).
  
  
  CONCLUSIONS
  Serum NO and urinary nitrate excretion were found to be elevated in patients with HSP and this increase was associated with activation of the disease rather than its severity. These findings suggest a role for NO in the pathogenesis of HSP, but nitric oxide in HSP should be further studied in order to elucidate the pathophysiology of the disease.
authors.affiliation: Department of Pediatric Nephrology, Gazi University, Ankara, Turkey. soylemez@med.gazi.edu.tr
authors.forename: Oğuz
authors.initials: O
authors.lastname: Söylemezoğlu
authors.forename: Ozan
authors.initials: O
authors.lastname: Ozkaya
authors.forename: Deniz
authors.initials: D
authors.lastname: Erbaş
authors.forename: Nermin
authors.initials: N
authors.lastname: Akkök
authors.forename: Necla
authors.initials: N
authors.lastname: Buyan
authors.forename: Enver
authors.initials: E
authors.lastname: Hasanoğlu
mesh_terms: D000293:Adolescent; D002097:C-Reactive Protein / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D005260:Female; D005767:Gastrointestinal Diseases / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D011695:IgA Vasculitis / Q000150:complications / Q000378:metabolism* / Q000503:physiopathology; D007592:Joint Diseases / Q000209:etiology / Q000503:physiopathology; D008297:Male; D009393:Nephritis / Q000209:etiology / Q000503:physiopathology; D009566:Nitrates / Q000097:blood / Q000652:urine; D009569:Nitric Oxide / Q000096:biosynthesis*
chemical_list: D009566:Nitrates; D009569:Nitric Oxide; D002097:C-Reactive Protein