Eyelid edema as a predictive factor for sensitization to Pru p 7 in peach allergy

J Dermatol. 2016 Aug;43(8):900-5. doi: 10.1111/1346-8138.13316. Epub 2016 Feb 24.

Abstract

The clinical and laboratory factors related to Pru p 7 sensitization in peach allergy, compared with those associated with sensitization to Pru p 1, which is related to pollen-food allergy syndrome (PFAS), have still not been clarified. The aim of the present study was to identify the clinical and laboratory features associated with sensitization to Pru p 7. Fifty patients (male : female, 14:36; mean age, 31.8 years) with peach allergy were enrolled in this study. Specific immunoglobulin E (sIgE) against the purified nPru p 7 was measured by enzyme-linked immunoassay, whereas using ImmunoCAP, sIgE levels against peach, rPru p 1, rPru p 3 and rPru p 4 were measured. Correlations between the clinical characteristics of peach allergy and sensitization to the allergens were statistically analyzed. In 50 patients with peach allergy, 13 and 33 patients were sensitized with nPru p 7 and rPru p 1, respectively. Laryngeal tightness, conjunctival injection, facial edema, eyelid edema and urticaria were significantly associated with Pru p 7 sensitization. In contrast, oropharyngeal symptoms were strongly related to Pru p 1 sensitization but were significantly less common in the Pru p 7-positive group. Co-sensitization to the representative pollens related to PFAS, such as alder pollens, was significantly related to Pru p 1 sensitization, but not Pru p 7 sensitization. Along with the absence of co-sensitization to pollens related to PFAS, facial edema and especially eyelid edema after the ingestion of peaches could be a predictive factor for sensitization to Pru p 7.

Keywords: Pru p 7; food allergy; gibberellin-regulated protein; peach; peamaclein.

MeSH terms

  • Adolescent
  • Adult
  • Allergens / adverse effects*
  • Allergens / immunology
  • Antibody Specificity
  • Antigens, Plant / adverse effects
  • Antigens, Plant / immunology
  • Child
  • Edema / etiology*
  • Edema / immunology
  • Eyelid Diseases / etiology*
  • Eyelid Diseases / immunology
  • Female
  • Food Hypersensitivity / etiology*
  • Food Hypersensitivity / immunology
  • Humans
  • Immunoglobulin E / blood
  • Male
  • Middle Aged
  • Plant Proteins / adverse effects*
  • Plant Proteins / immunology
  • Pollen / adverse effects
  • Pollen / immunology
  • Prunus persica / adverse effects*
  • Prunus persica / immunology
  • Young Adult

Substances

  • Allergens
  • Antigens, Plant
  • Plant Proteins
  • Pru p 1 allergen
  • peamaclein protein, Prunus persica
  • Immunoglobulin E