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Title: Differential allergen sensitization patterns in chestnut allergy with or without associated latex-fruit syndrome
Authors: Sánchez-Monge, Rosa
Blanco, Carlos
López-Torrejón, Gema
Cumplido, Jose
Recas, Munia
Figueroa Rivero, Javier 
Carrillo, Teresa 
Salcedo, Gabriel
UNESCO Clasification: 32 Ciencias médicas
320701 Alergias
Keywords: Chestnut
Food allergy
Latex-fruit syndrome
Lipid transfer protein
Class I chitinase, et al
Issue Date: 2006
Journal: Journal of Allergy and Clinical Immunology 
Abstract: Background Chestnut allergy has been almost exclusively considered in the context of the latex-fruit syndrome. Chestnut allergens not linked to latex hypersensitivity have not been studied. Objective We sought to explore whether differences in sensitization patterns between chestnut allergy with or without associated latex-fruit syndrome can be detected. Methods Twelve patients sensitized to chestnut but not to latex and 3 control patients with latex-chestnut allergy were analyzed. A major chestnut allergen was purified and characterized. IgE immunoblotting, specific IgE determination, and skin prick tests with 5 isolated allergens involved in food allergy or latex-fruit syndrome were also performed. Results A major 9-kd allergen was detected in chestnut extract, isolated, and identified as lipid transfer protein (LTP) Cas s 8. Specific IgE to this allergen was found in 91% (by means of IgE immunoblotting) and 58% (by means of ELISA) of sera from patients with chestnut but not latex allergy. Moreover, 66% of these patients had positive skin prick test responses to Cas s 8. Additionally, allergenic LTPs from peach fruit and Artemisia vulgaris pollen were also reactive. In contrast, avocado class I chitinase and latex hevein, allergens associated with the latex-fruit syndrome, showed no reaction. The opposite situation was exhibited by patients with latex-chestnut allergy. Conclusions Patients with chestnut allergy with or without associated latex hypersensitivity present different patterns of major allergens (LTPs and class I chitinases, respectively). Clinical implications LTPs and class I chitinases can be used as diagnostic tools in patients with chestnut allergy to predict whether an associated latex sensitization and a risk of potential cross-reactivity with other plant foods and pollens exist.
ISSN: 0091-6749
DOI: 10.1016/j.jaci.2006.04.058
Source: Journal of Allergy and Clinical Immunology[ISSN 0091-6749],v. 118(3), p. 705-710 (Septiembre 2006)
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