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Probiotic Lactobacillus casei activates innate immunity via NF-kappaB and p38 MAP kinase signaling pathways.
- Source :
-
Microbes and infection [Microbes Infect] 2006 Apr; Vol. 8 (4), pp. 994-1005. Date of Electronic Publication: 2006 Jan 18. - Publication Year :
- 2006
-
Abstract
- Probiotic bacteria are microorganisms that benefit the host through improvement of the balance of intestinal microflora and possibly by augmentation of host defense systems. We examined the mechanisms for the up-regulation of innate immune responses by a probiotic Lactobacillus casei ATCC27139, in vivo. Using mouse models of systemic Listeria monocytogenes infection and MethA fibrosarcoma tumorigenesis in combination with BALB/c and SCID mice, we found that parenteral administration of L. casei ATCC27139 confers a protective effect against L. monocytogenes infection and anti-tumor activity against MethA fibrosarcoma by activation of innate immunity, while L. casei ATCC27139-J1R strains, which are J1 phage-resistant strains that have been selected from MNNG-treated clones, lacked these activities. Substantial differences between ATCC27139 and ATCC27139-J1R strains were observed in the capacity to induce innate cytokines such as TNF-alpha, IL-12, IL-18, and IFN-gamma, and pathogen-associated molecular pattern receptors, TLR2 and Nod2, by spleen cells. In addition, although phosphorylation of NF-kappaB p65 in spleen was equally enhanced in the ATCC27139- and the ATCC27139-J1R-treated groups, phosphorylation of both p38 MAPK and MAPKAPK-2 was significantly induced only by ATCC27139. Furthermore, inhibitors of NF-kappaB (sulfasalazine) and p38 MAPK (SB203580) significantly reduced cytokine production by the spleen cells of the mice treated with L. casei ATCC27139, suggesting that both NF-kappaB and p38 MAPK signaling pathways play important roles in the augmentation of innate immunity by the probiotic L. casei.
- Subjects :
- Animals
Cells, Cultured
Cytokines biosynthesis
Fibrosarcoma immunology
Hot Temperature
Intracellular Signaling Peptides and Proteins metabolism
Listeria monocytogenes
Listeriosis immunology
Mice
Mice, Inbred BALB C
Mice, Inbred C57BL
Microbial Viability
NF-kappa B metabolism
Neoplasms, Experimental immunology
Nod2 Signaling Adaptor Protein
Severe Combined Immunodeficiency
Signal Transduction
Spleen cytology
Spleen immunology
Spleen metabolism
Toll-Like Receptor 2 metabolism
p38 Mitogen-Activated Protein Kinases metabolism
Immunity, Innate
Lacticaseibacillus casei physiology
NF-kappa B immunology
p38 Mitogen-Activated Protein Kinases immunology
Subjects
Details
- Language :
- English
- ISSN :
- 1286-4579
- Volume :
- 8
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Microbes and infection
- Publication Type :
- Academic Journal
- Accession number :
- 16513392
- Full Text :
- https://doi.org/10.1016/j.micinf.2005.10.019