title: Aspirin-triggered 15-HETE generation in peripheral blood leukocytes is a specific and sensitive Aspirin-Sensitive Patients Identification Test (ASPITest).
abstract: BACKGROUND
  We have previously demonstrated that aspirin triggers specific generation of 15-hydroxyeicosateraenoic acid (15-HETE) from nasal polyp epithelial cells and peripheral blood leukocytes (PBL) from aspirin-sensitive (AS) but not aspirin-tolerant (AT) patients with asthma/rhinosinusitis. The goal of this study was to assess the diagnostic value of ASA-induced 15-HETE generation measurement to identify AS patients.
  
  
  METHODS
  PBL were obtained from 43 AS patients with asthma and rhinosinusitis, 35 AT asthmatics and 17 healthy control (HC) subjects. PBL were incubated with 2-200 muM aspirin (ASA) and 15-HETE release was measured in cell supernatants with competitive ELISA.
  
  
  RESULTS
  Unstimulated PBL from all three groups of patients generated similar amount of 15-HETE. Incubation with 200 microM ASA resulted in an increase in an 15-HETE generation (mean increase +421%) in AS-asthmatics but small and nonsignificant response in AT-asthmatics or control subjects. Receiver operating curve (ROC) analysis revealed that the sensitivity of the test for confirmation of ASA-sensitivity was 83% and the specificity 82%. Positive predictive value was 0.79 and negative predictive value was 0.86. Naproxen induced a significant increase in 15-HETE only in some AS-asthmatics, but not in AT-asthmatics.
  
  
  CONCLUSIONS
  Our data demonstrate that ASA-induced 15-HETE generation by PBL is a specific and sensitive aspirin-sensitive patients identification test (ASPITest).
authors.affiliation: Department of Clinical Immunology and Allergy, Faculty of Medicine, Medical University, Lodz, Poland.
authors.forename: M L
authors.initials: ML
authors.lastname: Kowalski
authors.forename: A
authors.initials: A
authors.lastname: Ptasinska
authors.forename: M
authors.initials: M
authors.lastname: Jedrzejczak
authors.forename: B
authors.initials: B
authors.lastname: Bienkiewicz
authors.forename: M
authors.initials: M
authors.lastname: Cieslak
authors.forename: J
authors.initials: J
authors.lastname: Grzegorczyk
authors.forename: R
authors.initials: R
authors.lastname: Pawliczak
authors.forename: L
authors.initials: L
authors.lastname: Dubuske
mesh_terms: D000328:Adult; D000368:Aged; D001241:Aspirin / Q000009:adverse effects*; D001249:Asthma / Q000276:immunology*; D004342:Drug Hypersensitivity / Q000175:diagnosis* / Q000276:immunology; D005260:Female; D006801:Humans; D006893:Hydroxyeicosatetraenoic Acids / Q000096:biosynthesis*; D007159:Immunologic Tests; D007962:Leukocytes / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012220:Rhinitis / Q000276:immunology; D012852:Sinusitis / Q000276:immunology
chemical_list: D006893:Hydroxyeicosatetraenoic Acids; C025984:15-hydroxy-5,8,11,13-eicosatetraenoic acid; D001241:Aspirin