title: Platanus acerifolia pollinosis and food allergy.
abstract: BACKGROUND
  In Mediterranean areas, oral allergy syndrome (OAS) occurs independently of an associated birch pollinosis; moreover, on occasions it presents with no other associated pollinosis. The aim of this study was to assess the possible association of OAS with Platanus acerifolia pollinosis.
  
  
  METHODS
  We evaluated consecutive patients seen for pollinosis in an allergy department. Seven hundred and twenty patients were selected on the basis of seasonal or perennial rhinitis, or asthma, or both. Respiratory and food allergies were studied in all patients. Clinical history was recorded and examinations and skin prick tests were performed with a battery of available common inhalant allergens and plant-derived food allergens. Specific IgE levels to P. acerifolia pollen extract and food allergens tested were measured. Molecular masses of the IgE-binding proteins and cross-reactivity among the P. acerifolia pollen and different food extracts were also determined.
  
  
  RESULTS
  Of the 720 patients evaluated, 61 (8.48%) were sensitized to P. acerifolia pollen. Food allergy was observed in 32 (52.45%) of the 61 patients sensitized to P. acerifolia pollen. Food allergens most frequently implicated were hazelnuts, peach, apple, peanuts, maize, chickpea and lettuce. Enzyme allergosorbent (EAST)-inhibition showed high inhibition values when P. acerifolia pollen extract was used as free phase. On the contrary low inhibition was observed when plant-derived food allergens were used as free phase and P. acerifolia pollen extract as solid phase.
  
  
  CONCLUSIONS
  Cross-reactivity was observed among P. acerifolia pollen and plant-derived foods. OAS in these patients may have been caused by primary respiratory sensitization.
authors.affiliation: Allergy Department, Institut Universitari Dexeus, Barcelona, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Enrique
authors.forename: A
authors.initials: A
authors.lastname: Cisteró-Bahíma
authors.forename: B
authors.initials: B
authors.lastname: Bartolomé
authors.forename: R
authors.initials: R
authors.lastname: Alonso
authors.forename: M M
authors.initials: MM
authors.lastname: San Miguel-Moncín
authors.forename: J
authors.initials: J
authors.lastname: Bartra
authors.forename: A
authors.initials: A
authors.lastname: Martínez
mesh_terms: D000328:Adult; D000485:Allergens / Q000009:adverse effects* / Q000145:classification / Q000276:immunology*; D003231:Conjunctivitis / Q000209:etiology; D003429:Cross Reactions / Q000276:immunology; D005512:Food Hypersensitivity / Q000209:etiology*; D006801:Humans; D015151:Immunoblotting; D007073:Immunoglobulin E / Q000276:immunology; D008875:Middle Aged; D010940:Plant Proteins / Q000009:adverse effects* / Q000145:classification / Q000276:immunology*; D011058:Pollen / Q000009:adverse effects* / Q000145:classification / Q000276:immunology*; D012220:Rhinitis / Q000209:etiology; D013030:Spain / Q000453:epidemiology; D014197:Trees
chemical_list: D000485:Allergens; D010940:Plant Proteins; D007073:Immunoglobulin E