title: Add-on therapy with montelukast in the treatment of Henoch-Schönlein purpura.
abstract: BACKGROUND
  Previous studies suggested that leukotrienes (LT) were involved in the pathogenesis of Henoch-Schönlein purpura (HSP). This study investigated the efficacy of an add-on therapy with montelukast in the treatment of HSP.
  
  
  METHODS
  In this four-center, double-blind, placebo-controlled, parallel paired comparative study, 130 children with HSP were divided into two large groups: 84 patients without nephritis and 46 patients with nephritis. For each pair of patients with the same severity of disease, one subject was randomly allocated to one subgroup and the other allocated to the other subbroup; one subgroup received routine treatment plus placebo treatment, while the other subgroup received routine treatment plus montelukast treatment for 3 months. The efficacy was determined using Severity Scale Score (SSS). Blood eosinophil count, eosinophil cationic protein (ECP), IgE, interleukin (IL)-4, IL-5, IL-6, IL-8, IL-17, LTB4 , and urinary LTE4 were measured.
  
  
  RESULTS
  Add-on therapy with montelukast alleviated the symptoms of HSP including purpura, abdominal pain, stool occult blood, arthritis, proteinuria and hematuria, and, accordingly, shortened the length of hospital stay, and lowered blood eosinophil count, ECP, IgE, IL-4, IL-5, IL-6, IL-8, IL-17, LTB4 , and urinary LTE4 production, and also lowered the HSP relapse rate during the 3 months of treatment, but did not alter the outcome of nephritis at the end of follow up.
  
  
  CONCLUSIONS
  Add-on therapy with montelukast alleviated the symptoms of HSP. HSP may be improved by add-on therapy with a leukotriene receptor antagonist.
authors.affiliation: Department of Pediatrics, First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu, China.
authors.forename: Sheng-Hua
authors.initials: SH
authors.lastname: Wu
authors.forename: Pei-Yuan
authors.initials: PY
authors.lastname: Liao
authors.forename: Xiao-Qing
authors.initials: XQ
authors.lastname: Chen
authors.forename: Pei-Ling
authors.initials: PL
authors.lastname: Yin
authors.forename: Ling
authors.initials: L
authors.lastname: Dong
mesh_terms: D000085:Acetates / Q000008:administration & dosage*; D002648:Child; D003521:Cyclopropanes; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D011695:IgA Vasculitis / Q000628:therapy*; D020024:Leukotriene Antagonists / Q000008:administration & dosage*; D008297:Male; D011804:Quinolines / Q000008:administration & dosage*; D013440:Sulfides
chemical_list: D000085:Acetates; D003521:Cyclopropanes; D020024:Leukotriene Antagonists; D011804:Quinolines; D013440:Sulfides; C093875:montelukast
keywords: Henoch-Schönlein purpura; interleukin; leukotrienes; montelukast; nephritis