title: Aspirin idiosyncrasy in systemic mast cell disease: a new look at mediator release during aspirin desensitization.
abstract: OBJECTIVE
  To report the clinical responses and mediator-release profiles of an aspirin-sensitive man with systemic mast cell disease during aspirin desensitization.
  
  
  METHODS
  We quantified the release of six mediators during aspirin desensitization.
  
  
  RESULTS
  Although aspirin was administered cautiously with an initial dose of 20 mg, successful aspirin desensitization necessitated complete monitoring and resuscitation capabilities of a medical intensive-care unit for 4.5 days because of frequent, severe anaphylactoid responses. To our knowledge, this is the first report of a pronounced increase in plasma levels of the vasodilator peptide calcitonin gene-related peptide during episodes of aspirin-induced hypotension. Increases in plasma levels of calcitonin and serum levels of tryptase paralleled those of calcitonin gene-related peptide, but plasma levels of calcitonin remained increased for up to 18 hours. Urinary excretion of histamine and 1-methyl-4-imidazoleacetic acid also showed precipitous, although delayed, increases. Excretion of the prostaglandin D2 metabolite 11 beta-prostaglandin F2 alpha followed a bimodal pattern during aspirin desensitization; after severe hypotensive responses, the maximal value was more than 490,000 pg/mL, but the level decreased to less than 100 pg/mL after therapeutic serum levels of salicylate were attained.
  
  
  CONCLUSIONS
  These data suggest that the hypotensive responses to aspirin in some patients with systemic mast cell disease may result from the combined effects of several mediators.
authors.affiliation: Division of Allergic Diseases and Internal Medicine, Mayo Clinic Rochester, MN 55905, USA.
authors.forename: J H
authors.initials: JH
authors.lastname: Butterfield
authors.forename: P C
authors.initials: PC
authors.lastname: Kao
authors.forename: G C
authors.initials: GC
authors.lastname: Klee
authors.forename: M W
authors.initials: MW
authors.lastname: Yocum
mesh_terms: D000328:Adult; D001241:Aspirin / Q000008:administration & dosage / Q000009:adverse effects*; D002116:Calcitonin / Q000097:blood; D015740:Calcitonin Gene-Related Peptide / Q000097:blood; D053818:Chymases; D003888:Desensitization, Immunologic / Q000379:methods*; D004837:Epinephrine / Q000627:therapeutic use; D006801:Humans; D007022:Hypotension / Q000097:blood / Q000139:chemically induced; D007093:Imidazoles / Q000097:blood; D018836:Inflammation Mediators / Q000097:blood; D008297:Male; D008415:Mastocytosis / Q000097:blood / Q000188:drug therapy*; D015230:Prostaglandin D2 / Q000097:blood; D012697:Serine Endopeptidases / Q000097:blood; D053802:Tryptases
chemical_list: D007093:Imidazoles; D018836:Inflammation Mediators; C002667:methylimidazoleacetic acid; D002116:Calcitonin; D012697:Serine Endopeptidases; C083294:chymase 2; D053818:Chymases; D053802:Tryptases; D015740:Calcitonin Gene-Related Peptide; D001241:Aspirin; D015230:Prostaglandin D2; D004837:Epinephrine