Augmentation of T(H)-1 type response by immunoactive AT oligonucleotide from lactic acid bacteria via Toll-like receptor 9 signaling.

TitleAugmentation of T(H)-1 type response by immunoactive AT oligonucleotide from lactic acid bacteria via Toll-like receptor 9 signaling.
Publication TypeJournal Article
Year of Publication2005
AuthorsShimosato T, Kitazawa H, Katoh S, Tohno M, Iliev ID, Nagasawa C, Kimura T, Kawai Y, Saito T
JournalBiochem Biophys Res Commun
Volume326
Issue4
Pagination782-7
Date Published2005 Jan 28
ISSN0006-291X
KeywordsAnimals, AT Rich Sequence, Cell Line, CpG Islands, DNA, Bacterial, Dose-Response Relationship, Drug, Humans, Kidney, Lactobacillus, Membrane Glycoproteins, Oligodeoxyribonucleotides, Receptors, Cell Surface, Signal Transduction, Swine, Th1 Cells, Toll-Like Receptor 9, Toll-Like Receptors
Abstract

Toll-like receptor 9, which is expressed on the surface of antigen presenting cells and which was recently identified in the cytoplasmic follicle, recognizes bacterial CpG oligodeoxynucleotides (ODNs), resulting in the induction of a potent immune response. However, in our previous study, we found that TLR9 potentially recognizes not only CpG ODN but also non-CpG ODN such as AT ODN. Therefore, in the present study, to investigate this possibility, we elucidated the effects of AT ODN on T(H)-1, T(H)-2 type cytokine induction via TLR9 by real-time quantitative PCR analysis and ELISA of the swine TLR9 transfectant. The results demonstrated that the T(H)-1 type cytokines such as interleukin (IL)-12p70 and interferon (IFN)-gamma were strongly induced by AT ODN compared to the unexposed controls, while T(H)-2 type cytokines were not induced. These results indicate that the AT ODN can augment the T(H)-1 immune response, which plays an important role in prevention of allergic responses. Moreover, the swine TLR9 transfectant demonstrated its usefulness for evaluation of immunostimulation by bacterial DNA through the detection of T(H)-1, T(H)-2 type cytokine induction via TLR9 signaling.

DOI10.1016/j.bbrc.2004.11.119
Alternate JournalBiochem. Biophys. Res. Commun.
PubMed ID15607737

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