title: Probiotic fermented milk consumption modulates the allergic process induced by ovoalbumin in mice.
abstract: Orally administered probiotic micro-organisms are able to regulate the exacerbated immune response during the antigenic sensitisation process. The aim of the present study was to evaluate the potential efficacy of probiotic fermented milk (PFM) in preventing or treating allergy in an experimental model, and to investigate its underlying mechanisms. Ovoalbumin (OVA)-sensitised BALB/c mice were fed with PFM before the sensitisation procedure or fed continuously with PFM. At 7 and 15 d post-sensitisation, anti-OVA-specific IgE, IgG, IgG1 and IgG2a concentrations were measured in the serum and broncho-alveolar lavage fluid (BALF). Concentrations of interferon-γ (IFN-γ), IL-4, IL-10 and total secretory IgA (S-IgA) were measured in the supernatants of macerated lungs or in the BALF. The levels of IgA+, CD4+ and CD8+ T lymphocytes and F4/80+ cells were measured in the lungs by immunofluorescence. Inducible CD4+/CD25/Foxp3+ regulatory T (Treg) cells were evaluated in the lungs. PFM shifted the T helper (Th)2 profile response towards a Th1 response that led to the production of IgG instead of IgE, with increasing levels of IL-10 and IFN-γ that play an important role in immunomodulation exerted by PFM administration in sensitised mice. Anti-OVA-specific IgE levels were significantly decreased; however, there was no modification in the levels of anti-OVA-specific IgG and total S-IgA. PFM did not influence Treg cells in treated mice. Consumption of PFM could be a promising strategy in the amelioration of airway allergies, considering that the effect is mediated by the production of IgG through the activation of Th1 instead of the direct activation of Th2 cells to produce IgE.
authors.affiliation: Centro de Referencia para Lactobacilos, CERELA-CONICET,Chacabuco 145,San Miguel de Tucumán-Tucumán,Argentina.
authors.forename: Eva M M
authors.initials: EM
authors.lastname: Velez
authors.affiliation: Centro de Referencia para Lactobacilos, CERELA-CONICET,Chacabuco 145,San Miguel de Tucumán-Tucumán,Argentina.
authors.forename: Carolina
authors.initials: C
authors.lastname: Maldonado Galdeano
authors.affiliation: CESNI (Centro de Estudios Nutricionales Infantiles),Buenos Aires,Argentina.
authors.forename: Esteban
authors.initials: E
authors.lastname: Carmuega
authors.affiliation: Director Científico Latam, DANONE Argentina S.A.,Buenos Aires,Argentina.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Weill
authors.affiliation: Cátedra de Inmunología, Instituto de Microbiología, Facultad de Bioquímica, Química y Farmacia, UNT,Argentina.
authors.forename: María E
authors.initials: ME
authors.lastname: Bibas Bonet
authors.affiliation: Centro de Referencia para Lactobacilos, CERELA-CONICET,Chacabuco 145,San Miguel de Tucumán-Tucumán,Argentina.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Perdigón
mesh_terms: D000818:Animals; D001419:Bacteria; D001992:Bronchoalveolar Lavage Fluid; D043302:Cultured Milk Products / Q000382:microbiology; D016207:Cytokines / Q000378:metabolism; D004032:Diet; D005285:Fermentation; D006967:Hypersensitivity / Q000188:drug therapy* / Q000276:immunology / Q000378:metabolism; D007074:Immunoglobulin G / Q000378:metabolism*; D007136:Immunoglobulins / Q000378:metabolism; D008168:Lung / Q000276:immunology / Q000378:metabolism; D008297:Male; D008807:Mice, Inbred BALB C; D010047:Ovalbumin / Q000009:adverse effects / Q000276:immunology*; D019936:Probiotics / Q000627:therapeutic use*; D050378:T-Lymphocytes, Regulatory / Q000378:metabolism; D018417:Th1 Cells / Q000378:metabolism; D058408:Th1-Th2 Balance; D018418:Th2 Cells / Q000378:metabolism
chemical_list: D016207:Cytokines; D007074:Immunoglobulin G; D007136:Immunoglobulins; D010047:Ovalbumin
keywords: Allergy model; Interferon-γ; Ovoalbumin; Probiotic fermented milk; T helper 1/T helper 2 balance