PMID- 21893216 OWN - NLM STAT- MEDLINE DCOM- 20120413 LR - 20220318 IS - 1878-1705 (Electronic) IS - 1567-5769 (Linking) VI - 11 IP - 12 DP - 2011 Dec TI - Lactobacillus plantarum strain YU from fermented foods activates Th1 and protective immune responses. PG - 2017-24 LID - 10.1016/j.intimp.2011.08.013 [doi] AB - Lactic acid bacteria (LAB) are known to have effects on immune function. From 203 strains of LAB isolated from fermented foods, we selected a beneficial strain, Lactobacillus plantarum strain YU (LpYU), which has high interleukin (IL)-12-inducing activity in mouse peritoneal macrophages. This activity of LpYU was partially mediated by Toll-like receptor (TLR) 2, but not TLR4 or TLR9. Oral administration of LpYU to ovalbumin (OVA)-immunized mice caused suppression of serum OVA-specific immunoglobulin E (IgE) levels, enhancing interferon (IFN)-gamma production from spleen cells in response to OVA. Furthermore, LpYU enhanced natural killer cell activity in spleen cells and the production of IgA from Peyer's patch cells. Because activation of Th1 immune responses and IgA production induce antiviral effects, we evaluated the inhibitory effects of LpYU against the influenza A virus (A/NWS/33, H1N1) (IFV). Oral administration of LpYU suppressed viral proliferation in the lungs and in bronchoalveolar lavage fluids (BALFs). Both levels of IFV-specific secretory IgA in BALF and feces and titers of IFV-specific neutralizing antibody in BALFs and sera were increased. These results indicate that LpYU has a protective effect against IFV replication. We conclude that this strain has a beneficial effect in activating Th1 immune responses and preventing viral infection. CI - Copyright (c) 2011 Elsevier B.V. All rights reserved. FAU - Kawashima, Tadaomi AU - Kawashima T AD - Research and Development Division, Kikkoman Corporation, Chiba, Japan. takawashima@mail.kikkoman.co.jp FAU - Hayashi, Kyoko AU - Hayashi K FAU - Kosaka, Akemi AU - Kosaka A FAU - Kawashima, Megumi AU - Kawashima M FAU - Igarashi, Toshinori AU - Igarashi T FAU - Tsutsui, Hiroko AU - Tsutsui H FAU - Tsuji, Noriko M AU - Tsuji NM FAU - Nishimura, Ikuko AU - Nishimura I FAU - Hayashi, Toshimitsu AU - Hayashi T FAU - Obata, Akio AU - Obata A LA - eng PT - Journal Article DEP - 20110903 PL - Netherlands TA - Int Immunopharmacol JT - International immunopharmacology JID - 100965259 RN - 0 (Antibodies, Neutralizing) RN - 0 (Immunoglobulin A) RN - 0 (Tlr2 protein, mouse) RN - 0 (Toll-Like Receptor 2) RN - 187348-17-0 (Interleukin-12) RN - 37341-29-0 (Immunoglobulin E) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Animals MH - Antibodies, Neutralizing/blood MH - Bronchoalveolar Lavage Fluid/immunology/virology MH - Cell Proliferation MH - Feces/microbiology MH - Immunoglobulin A/biosynthesis/immunology MH - Immunoglobulin E/blood MH - Influenza A virus/*immunology MH - Interferon-gamma/biosynthesis/immunology MH - Interleukin-12/biosynthesis/immunology MH - Killer Cells, Natural/immunology/metabolism/microbiology MH - Lactobacillus plantarum/*immunology MH - Lung/immunology/virology MH - Macrophages, Peritoneal/immunology/metabolism/microbiology MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Orthomyxoviridae Infections/*immunology/microbiology MH - Peyer's Patches/immunology/metabolism/microbiology MH - Probiotics/*administration & dosage MH - Spleen/immunology/metabolism/microbiology MH - Th1 Cells/*immunology/microbiology MH - Toll-Like Receptor 2/immunology MH - Treatment Outcome EDAT- 2011/09/07 06:00 MHDA- 2012/04/14 06:00 CRDT- 2011/09/07 06:00 PHST- 2011/04/01 00:00 [received] PHST- 2011/08/18 00:00 [revised] PHST- 2011/08/21 00:00 [accepted] PHST- 2011/09/07 06:00 [entrez] PHST- 2011/09/07 06:00 [pubmed] PHST- 2012/04/14 06:00 [medline] AID - S1567-5769(11)00333-X [pii] AID - 10.1016/j.intimp.2011.08.013 [doi] PST - ppublish SO - Int Immunopharmacol. 2011 Dec;11(12):2017-24. doi: 10.1016/j.intimp.2011.08.013. Epub 2011 Sep 3.