title: Hypersensitivity to aspirin: common eicosanoid alterations in urticaria and asthma.
abstract: BACKGROUND
  Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) can precipitate adverse reactions in two apparently different clinical conditions: bronchial asthma and chronic idiopathic urticaria (CIU). Recent evidence indicates that the reactions are triggered by the drugs that inhibit cyclooxygenase-1 but not cyclooxygenase-2.
  
  
  OBJECTIVE
  To assess whether patients with CIU and aspirin sensitivity share common eicosanoid alterations with patients who have aspirin-sensitive asthma.
  
  
  METHODS
  Seventy-four patients with CIU and a history of sensitivity to aspirin and NSAIDs underwent placebo-controlled oral aspirin challenge tests. Concentrations of urinary leukotriene E4 (uLTE4) were measured by ELISA and plasma stable prostaglandin D2 metabolite, 9alpha,11beta prostaglandin F(2) by GC/MS. All measurements were carried out at baseline and after aspirin dosing. Patients were genotyped for the leukotriene C4 synthase (LTC4S) promoter single nucleotide polymorphism.
  
  
  RESULTS
  In 30 of 74 patients, the aspirin challenge was positive, resulting in urticaria/angioedema. In these 30 patients, baseline uLTE4 levels were higher than in nonresponders and the healthy control subjects and increased further (significantly) after the onset of clinical reaction. No such increase occurred in subjects with negative aspirin challenge. Baseline uLTE4 levels correlated with severity of skin reactions. Plasma 9alpha,11beta prostaglandin F(2) levels rose significantly in both aspirin responders and nonresponders, although in the latter group the increase occurred later than in the former. In patients who reacted to aspirin, frequency of (-444)C allele of LTC4S was significantly higher than in patients who did not react.
  
  
  CONCLUSIONS
  CIU with aspirin sensitivity is characterized by the eicosanoid alterations, which are similar to those present in aspirin-induced asthma.
authors.affiliation: Departments of Medicine and Dermatology, Jagiellonian University School of Medicine, ul. Skawinska 8, 31-066 Kraków, Poland.
authors.forename: Lucyna
authors.initials: L
authors.lastname: Mastalerz
authors.forename: Malgorzta
authors.initials: M
authors.lastname: Setkowicz
authors.forename: Marek
authors.initials: M
authors.lastname: Sanak
authors.forename: Andrew
authors.initials: A
authors.lastname: Szczeklik
mesh_terms: D000328:Adult; D000483:Alleles; D001241:Aspirin / Q000009:adverse effects*; D001249:Asthma / Q000209:etiology / Q000378:metabolism*; D015237:Dinoprost / Q000097:blood; D004342:Drug Hypersensitivity / Q000150:complications / Q000209:etiology* / Q000235:genetics; D015777:Eicosanoids / Q000378:metabolism*; D005260:Female; D005838:Genotype; D005982:Glutathione Transferase / Q000235:genetics; D006801:Humans; D017999:Leukotriene E4 / Q000652:urine; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D016037:Single-Blind Method; D014581:Urticaria / Q000209:etiology / Q000378:metabolism*
chemical_list: D015777:Eicosanoids; D017999:Leukotriene E4; D015237:Dinoprost; D005982:Glutathione Transferase; C041116:leukotriene-C4 synthase; D001241:Aspirin