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Background: Peach is a common food allergen source throughout Europe. The aim of this study was to characterize peach allergy in a Portuguese patient population.
Methods: Thirty peach-allergic patients confirmed by double-blind placebo-controlled food challenges and 29 controls were included. All subjects completed a standardized questionnaire regarding symptoms and epidemiologic characteristics, skin prick tests with inhalant allergens and foods as well as specific IgE antibodies to peach, recombinant peach allergens rPru p 1, rPru p 3, rPru p 4 and cross-reactive carbohydrate determinants.
Results: Thirty-seven percent of patients reported only oral allergy syndrome, while 37% reported generalized urticaria and/or angioedema, 17% localized contact urticaria and 10% anaphylaxis with peach. Sensitization to other Rosaceae fruits and tree nuts was present in 90 and 77% of the patients, respectively. Respiratory allergy history was associated with less severe symptoms (oral allergy syndrome or contact urticaria; p < 0.01) and positive skin prick test to peach peel or plum with more severe symptoms (urticaria and/or angioedema or anaphylaxis; p < 0.05). Ninety-seven percent were sensitized to Pru p 3, 13% to Pru p 4, 3% to Pru p 1 and 10% to cross-reactive carbohydrate determinants. Pru p 3 specific IgE was associated with Artemisia vulgaris sensitization and tree nut allergy (p < 0.05) but not with clinical severity.
Conclusions: Half the patients reported systemic reactions to peach. Peach allergy appeared predominantly mediated by Pru p 3 but some patients were sensitized to Pru p 4. Applying a 0.10 kU(A)/l cutoff level, the diagnostic value of combining the 3 recombinant allergens was noteworthy, with 100% sensitivity and 90% specificity.
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http://dx.doi.org/10.1159/000176308 | DOI Listing |
Front Allergy
December 2024
Gregorio Marañón Health Research Institute, Allergy Department, Gregorio Marañón General University Hospital, Madrid, Spain.
Background: Lipid transfer proteins (LTP) are associated with a wide range of severity of allergic reactions. However, the risk factors associated with this severity are not fully understood.
Objectives: To describe the clinical characteristics of peach-allergic patients due to LTP sensitization and analyze the relationship between the severity of the reactions and patients' sensitization profiles.
Sci Rep
December 2024
Molecular Allergology, Paul-Ehrlich-Institut, Federal Institute for Vaccines and Biomedicines, Langen, Germany.
Since therapeutic options are limited the utilization of prebiotics is suggested to prevent food allergies (FAs). Using an experimental peach allergy model we explored the effect of dietary fiber pectin, a high-methoxyl heteropolysaccharide, on the manifestation of FA. CBA/J mice were sensitized, subsequently orally boosted and provoked with peach peel extract.
View Article and Find Full Text PDFFood Funct
December 2024
Departamento de Producción Animal y Ciencia de Los Alimentos. Facultad de Veterinaria. Instituto Agroalimentario de Aragón (IA2) (Universidad de Zaragoza-CITA), Spain.
Pru p 3, a member of the lipid transfer protein family, is considered a major allergen from peach as it often induces serious allergic reactions in peach-allergic individuals. The high resistance of Pru p 3 to processing treatments and to digestion or enzymatic hydrolysis is probably the cause of the severity of this fruit allergy. The aim of this study was to determine the effect of treatment with a large number of proteases from different origins (vegetal, animal and microbial) on the degradation and allergenicity of Pru p 3.
View Article and Find Full Text PDFJ Agric Food Chem
October 2024
Chinese Academy of Inspection and Quarantine, Beijing 100176, People's Republic of China.
Pru p 7 (also named Peamaclein) is a member of the gibberellin-regulated protein family, which is the latest foodborne allergenic protein identified in peach. In this paper, the prokaryotic expression and identification of Pru p 7 were performed, and the protein properties, structure, and homology were analyzed. In addition, a preliminary screening of B-cell linear epitopes of Pru p 7 was performed by the bioinformatics software prediction method, and three epitopes were identified using slot-blot immune microarray assay combined with an immune score matrix (P-1, AA16-21, AGYQER; P-2, AA40-46, TYGNKDE; P-3, AA52-59, DLKNSKGN).
View Article and Find Full Text PDFFront Allergy
September 2024
Department of Allergy, Beijing Children's Hospital, National Center for Children's Health, Capital Medical University, Beijing, China.
Exercise-induced anaphylaxis (EIA) is a rare and potentially life-threatening disorder. In difficult to control and refractory cases of EIA, biologics such as omalizumab and dupilumab have shown promise, with documented successful outcomes. Here, we present a case of EIA with lipid transfer protein (LTP) sensitization successfully treated with omalizumab with long-term follow-up.
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