Advanced application of porcine intestinal epithelial cells for the selection of immunobiotics modulating toll-like receptor 3-mediated inflammation.
OBJECTIVE
In this study, we aimed to characterize toll-like receptor (TLR)-3-mediated inflammatory immune response in porcine intestinal epithelial (PIE) cells and in PIE-immune cell co-cultures and, to evaluate if these in vitro systems are useful for selecting immunomodulatory lactic acid bacteria.


RESULTS
We demonstrated that these systems are valuable tools for the in vitro study of the inflammatory response triggered by TLR3 in intestinal epithelial cells (IECs) and of the interaction between IECs and immune cells. In addition, we showed that PIE cells could be used for the selection of immunobiotic lactobacilli strains with anti-inflammatory activities. We found that Lactobacillus casei MEP221114 is an immunobiotic candidate for modulation of TLR3-mediated inflammatory responses.


CONCLUSIONS
The present study deepened our understanding of the mechanisms of immunobiotic action by demonstrating that the interaction between some lactobacilli strains and IECs can up-regulate the mRNA expression of TLR negative regulators and that this effect could help to regulate the production of inflammatory mediators during the generation of a TLR3-mediated immune response.
Food Immunology Group, Laboratory of Animal Products Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan.
Shoichi
S
Hosoya
Food Immunology Group, Laboratory of Animal Products Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan.
Julio
J
Villena
Food Immunology Group, Laboratory of Animal Products Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan.
Eriko
E
Chiba
Laboratory of Animal Breading and Genetics, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan.
Tomoyuki
T
Shimazu
Department of Food, Agriculture and Environmental Sciences, Miyagi University, Sendai 982-0215, Japan.
Yoshihito
Y
Suda
Cell Biology Laboratory, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan.
Hisashi
H
Aso
Food Immunology Group, Laboratory of Animal Products Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan.
Tadao
T
Saito
Food Immunology Group, Laboratory of Animal Products Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai 981-8555, Japan. Electronic address: haruki@bios.tohoku.ac.jp.
Haruki
H
Kitazawa
D000818:Animals; D002460:Cell Line; D004847:Epithelial Cells / Q000187:drug effects*; D007155:Immunologic Factors / Q000302:isolation & purification* / Q000494:pharmacology*; D007249:Inflammation / Q000517:prevention & control*; D056546:Lactobacillales / Q000276:immunology*; D019936:Probiotics / Q000302:isolation & purification / Q000494:pharmacology; D013552:Swine; D051196:Toll-Like Receptor 3 / Q000037:antagonists & inhibitors* / Q000378:metabolism*
D007155:Immunologic Factors; D051196:Toll-Like Receptor 3