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Dig Liver Dis ; 38(10): 732-6, 2006 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-16880015

RESUMO

BACKGROUND: An abnormal intestinal permeability could contribute to establish an altered sensitivity to food-allergen. AIM: To evaluate the intestinal permeability in subjects with adverse reactions to food on allergen-free diet. SUBJECTS: Twenty-one patients with food allergy and 20 with food hypersensitivity on allergen-free diet were enrolled and divided in four groups according to the seriousness of their referred clinical symptoms when they were on a free diet. METHODS: Intestinal permeability was evaluated by Lactulose/Mannitol ratio urinary detection determined by anion-exchange chromatography. RESULTS: Statistically significant different Lactulose/Mannitol ratio was evidenced in subjects with food allergy (p=0.003) or hypersensitivity (p=0.0008) compared to control patients. The correlation between Lactulose/Mannitol ratio and the seriousness of clinical symptoms, by using Spearman test, was statistically significant for food allergy (p=0.0195) and hypersensitivity (p=0.005) patients. CONCLUSIONS: The present data demonstrate that impaired intestinal permeability, measured in our conditions, is present in all subjects with adverse reactions to food. In addition, for the first time, we report a statistically significant association between the severity of referred clinical symptoms and the increasing of Intestinal Permeability Index. These data reveal that intestinal permeability is not strictly dependent on IgE-mediated processes but could better be related to other mechanisms involved in early food sensitisation, as breast-feeding, or microbial environment that influence the development of oral tolerance in early infancy.


Assuntos
Hipersensibilidade Alimentar/metabolismo , Alimentos/efeitos adversos , Absorção Intestinal/fisiologia , Mucosa Intestinal/metabolismo , Adolescente , Adulto , Estudos de Casos e Controles , Feminino , Humanos , Intestinos/fisiopatologia , Lactulose/urina , Masculino , Manitol/urina , Pessoa de Meia-Idade , Permeabilidade
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