alexa Stimulation of Innate Immune Cells Induced by Probiotics: Participation of Toll-Like Receptors
ISSN: 2155-9899

Journal of Clinical & Cellular Immunology
Open Access

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Research Article

Stimulation of Innate Immune Cells Induced by Probiotics: Participation of Toll-Like Receptors

Maldonado GC1,2, Lemme-Dumit JM2, Thieblemont N3-6, Carmuega E7, Weill R8 and Perdigón G1,2*
1Laboratorio de Inmunología, Centro de Referencia para Lactobacilos (CERELA-CONICET), Tucumán, Argentina
2Cátedra de Inmunología, Instituto de Microbiología, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Argentina
3INSERM U1016 Cochin Institute, Paris, France
4CNRS UMR 8104, Paris, France
5Université Paris Descartes, France
6Center of Excellence, LABEX, France
7CESNI (Centro de Estudios Sobre Nutrición Infantil), Buenos Aires, Argentina
8Científico LATAM, DANONE Argentina SA, Buenos Aires, Argentina
Corresponding Author : Perdigón G
Centro de Referencia para Lactobacilos (CERELA-CONICET)
Chacabuco 145 (T4000ILC), Tucumán, Argentina
Tel: 54 381 4310465
Fax: 54 381 4005600
E-mail: [email protected]
Received November 07, 2014; Accepted January 13, 2015; Published January 20, 2015
Citation: Maldonado GC, Lemme DJM, Thieblemont N, Carmuega E, Weill R, et al. (2015) Stimulation of Innate Immune Cells Induced by Probiotics: Participation of Toll-Like Receptors. J Clin Cell Immunol 6:283. doi:10.4172/2155-9899.1000283
Copyright: © 2015 Maldonado GC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Objective: The present work aimed to study the functionality of macrophages from different locations (peritoneum, spleen and Peyer´s patches) when they were stimulated with probiotics microorganisms: Lactobacillus casei CRL 431 and Lactobacillus paracasei CNCM I-1518 or a Probiotic Fermented Milk (PFM) through Toll-Like Receptors (TLRs), prior challenged with agonists or antagonists of TLRs.
Methods: BALB/c mice received in the drinking water, the probiotic bacteria (L. casei CRL 431 and L. paracasei CNCM I-1518) or the PFM. We focused our investigation mainly on the phagocytic activity of macrophages from peritoneum, spleen and Peyer’s patches and cytokine production were evaluated prior challenged with TLR2 and TLR4 agonists or antagonists. The microbicidal activity of macrophages and against an infection with Salmonella typhimurium was also studied. To assess the role of TLR in probiotic stimulation, we evaluated the phagocytic activity, cytokine production and Immunoglobin G (IgG) anti-OVA in C57BL/6 knockout mice to MyD88, TLR2 and TLR4.
Results: In BALB/c mice, the best effect in the phagocytosis assay was obtained with the probiotic bacteria L. casei CRL 431, this effect was reinforced with TLR2 agonist. The production of different cytokines (IL-10 and IL-6) was improved with the probiotic treatments and this production was ameliorated with TLRs agonists. The antimicrobial activity was increased with L. casei CRL 431 and L. paracasei CNCM I-1518, TLR2 and TLR4 antagonists had a negative effect on microbicidal activity. The administration of probiotic bacteria or PFM improved the host response against S. typhimurium controlling the infection during the first hours post-infection. In C57BL/6 knockout mice, phagocytic activity was significantly diminished in comparison to wild type mice and the probiotic bacteria or PFM administration was not able to improve this activity. The IL-10 production was increased at a concentration of 108 cells/ml of L. casei CRL 431 in TLR2-/- and TLR4-/-, but not in MyD88-/- mice. The administration of probiotic bacteria or PFM did not play a stimulating effect in the systemic immune response against to OVA antigen in knockout mice.
Conclusions: Probiotics modulate the different signaling pathways of innate immune cells through the TLRs. The macrophages activation depends on location of them and that different probiotic strains of Lactobacilli can evoke different intensity of responses. The data suggest that probiotic not only promote a major expression of TLRs but also use these receptors via the innate immune cells as macrophages to stimulate and modulate the immune response.

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