Oral delivery of Brucella spp. recombinant protein U-Omp16 abrogates the IgE-mediated milk allergy

Food allergies are increasingly common disorders and no therapeutic strategies are yet approved. The unlipidated Omp16 (U-Omp16) is the outer membrane protein of 16 kDa from B. abortus and possesses a mucosal adjuvant property. In this study, we aimed to examine the U-Omp16 capacity to abrogate an a...

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Detalles Bibliográficos
Autores principales: Smaldini, Paola Lorena, Ibañez, Andrés Esteban, Fossati, Carlos Alberto, Cassataro, Juliana, Docena, Guillermo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Médicas
IgE
Immunomodulation
Intestinal mucosa
Milk allergy
Oral adjuvant
U-Omp16
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85127
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85127
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Médicas
IgE
Immunomodulation
Intestinal mucosa
Milk allergy
Oral adjuvant
U-Omp16
spellingShingle Ciencias Médicas
IgE
Immunomodulation
Intestinal mucosa
Milk allergy
Oral adjuvant
U-Omp16
Smaldini, Paola Lorena
Ibañez, Andrés Esteban
Fossati, Carlos Alberto
Cassataro, Juliana
Docena, Guillermo
Oral delivery of Brucella spp. recombinant protein U-Omp16 abrogates the IgE-mediated milk allergy
topic_facet Ciencias Médicas
IgE
Immunomodulation
Intestinal mucosa
Milk allergy
Oral adjuvant
U-Omp16
description Food allergies are increasingly common disorders and no therapeutic strategies are yet approved. The unlipidated Omp16 (U-Omp16) is the outer membrane protein of 16 kDa from B. abortus and possesses a mucosal adjuvant property. In this study, we aimed to examine the U-Omp16 capacity to abrogate an allergen-specific Th2 immune response when it is administered as an oral adjuvant in a mouse model of food allergy. Balb/c mice were sensitized with cholera toxin and cow's milk proteins (CMP) by gavage and simultaneously treated with U-Omp16 and CMP. Oral challenge with CMP was performed to evaluate the allergic status of mice. Symptoms, local (small bowel cytokine and transcription factor gene expression) and systemic (specific isotypes and spleen cell-secreted cytokines) parameters, and skin tests were done to evaluate the immune response. We found that the oral administration of U-Omp16 with CMP during sensitization dampened the allergic symptoms, with negativization of immediate skin test and increased skin DTH response. Serum specific IgE and IL-5 were inhibited and a Th1 response was promoted (specific IgG2a antibodies and CMP-induced IFN-γ secretion). We found at the mucosal site an inhibition of the gene expression corresponding to IL-13 and Gata-3, with an induction of IFN-γ and T-bet. These results indicated that the oral administration of U-Omp16 significantly controlled the allergic response in sensitized mice with a shift of the balance of Th1- and Th2-T cells toward Th1 predominance. These findings suggest that U-Omp16 may be useful as a Th1-directing adjuvant in an oral vaccine.
format Articulo
Articulo
author Smaldini, Paola Lorena
Ibañez, Andrés Esteban
Fossati, Carlos Alberto
Cassataro, Juliana
Docena, Guillermo
author_facet Smaldini, Paola Lorena
Ibañez, Andrés Esteban
Fossati, Carlos Alberto
Cassataro, Juliana
Docena, Guillermo
author_sort Smaldini, Paola Lorena
title Oral delivery of Brucella spp. recombinant protein U-Omp16 abrogates the IgE-mediated milk allergy
title_short Oral delivery of Brucella spp. recombinant protein U-Omp16 abrogates the IgE-mediated milk allergy
title_full Oral delivery of Brucella spp. recombinant protein U-Omp16 abrogates the IgE-mediated milk allergy
title_fullStr Oral delivery of Brucella spp. recombinant protein U-Omp16 abrogates the IgE-mediated milk allergy
title_full_unstemmed Oral delivery of Brucella spp. recombinant protein U-Omp16 abrogates the IgE-mediated milk allergy
title_sort oral delivery of brucella spp. recombinant protein u-omp16 abrogates the ige-mediated milk allergy
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/85127
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