title: Immunobiotic Lactobacillus jensenii elicits anti-inflammatory activity in porcine intestinal epithelial cells by modulating negative regulators of the Toll-like receptor signaling pathway.
abstract: The effect of Lactobacillus jensenii TL2937 on the inflammatory immune response triggered by enterotoxigenic Escherichia coli (ETEC) and lipopolysaccharide (LPS) in a porcine intestinal epitheliocyte cell line (PIE cells) was evaluated. Challenges with ETEC or LPS elicited Toll-like receptor 4 (TLR4)-mediated inflammatory responses in cultured PIE cells, indicating that our cell line may be useful for studying inflammation in the guts of weaning piglets. In addition, we demonstrated that L. jensenii TL2937 attenuated the expression of proinflammatory cytokines and chemokines caused by ETEC or LPS challenge by downregulating TLR4-dependent nuclear factorκB (NF-κB) and mitogen-activated protein kinase (MAPK) activation. Furthermore, we demonstrated that L. jensenii TL2937 stimulation of PIE cells upregulated three negative regulators of TLRs: A20, Bcl-3, and MKP-1, deepening the understanding of an immunobiotic mechanism of action. L. jensenii TL2937-mediated induction of negative regulators of TLRs would have a substantial physiological impact on homeostasis in PIE cells, because excessive TLR inflammatory signaling would be downregulated. These results indicated that PIE cells can be used to study the mechanisms involved in the protective activity of immunobiotics against intestinal inflammatory damage and may provide useful information for the development of new immunologically functional feeds that help to prevent inflammatory intestinal disorders, including weaning-associated intestinal inflammation.
authors.affiliation: Food Immunology Group, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Shimazu
authors.forename: Julio
authors.initials: J
authors.lastname: Villena
authors.forename: Masanori
authors.initials: M
authors.lastname: Tohno
authors.forename: Hitomi
authors.initials: H
authors.lastname: Fujie
authors.forename: Shoichi
authors.initials: S
authors.lastname: Hosoya
authors.forename: Takeshi
authors.initials: T
authors.lastname: Shimosato
authors.forename: Hisashi
authors.initials: H
authors.lastname: Aso
authors.forename: Yoshihito
authors.initials: Y
authors.lastname: Suda
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Kawai
authors.forename: Tadao
authors.initials: T
authors.lastname: Saito
authors.forename: Seiya
authors.initials: S
authors.lastname: Makino
authors.forename: Shuji
authors.initials: S
authors.lastname: Ikegami
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Itoh
authors.forename: Haruki
authors.initials: H
authors.lastname: Kitazawa
mesh_terms: D000818:Animals; D002460:Cell Line; D015536:Down-Regulation; D004847:Epithelial Cells / Q000187:drug effects / Q000276:immunology* / Q000382:microbiology; D004926:Escherichia coli / Q000276:immunology; D005786:Gene Expression Regulation; D007778:Lactobacillus / Q000276:immunology*; D008070:Lipopolysaccharides / Q000276:immunology; D020929:Mitogen-Activated Protein Kinase Kinases / Q000037:antagonists & inhibitors; D008969:Molecular Sequence Data; D016328:NF-kappa B / Q000037:antagonists & inhibitors; D017422:Sequence Analysis, DNA; D015398:Signal Transduction; D013552:Swine; D051193:Toll-Like Receptors / Q000276:immunology*; D015533:Transcriptional Activation
chemical_list: D008070:Lipopolysaccharides; D016328:NF-kappa B; D051193:Toll-Like Receptors; D020929:Mitogen-Activated Protein Kinase Kinases
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